Wednesday Mar 26, 2014

Migrating JDBC Resources from GlassFish to WebLogic

Following up with my series of articles about Migrating from GlassFish to WebLogic, this time I want to cover the migration of a very common resource used by every Java EE developer: JDBC resources, or simply, DataSources. And in case you haven't read yet the first article, here it is: Migrating a Java EE App from GlassFish to WebLogic. That one will walk you through redeploying a simple yet almost complete Java EE 6 application on WebLogic, without any code change nor specific deployment descriptors, and still taking advantage of the enhanced Maven Plugin in WebLogic 12c.

It is easy to migrate resources by using the Web consoles of both WebLogic and GlassFish. Just open one browser window for each server, put them side-by-side, and follow the UI menus. Most of the properties are the same. But if you walkthrough the full article below, you will not only learn the concepts and what is required to migrate JDBC resources, but also how to migrate things using Command-line Interface (asadmin from GlassFish; wlst from WebLogic). So in order to understand what I'm doing here, I strongly recommend you to read, at least the introduction of, these two docs below in case you are not familiar with asadmin or wlst:

Oracle WebLogic Types of JDBC Data Sources

WebLogic offers three types of DataSources. For this migration, the type we will use will be "Generic". To know more about each type, click on the links below:

  • Generic Data Source
    • the type you are most familiar with; we will focus on this one
  • GridLink Data Source
    • in case you have an Oracle RAC Database, this is an optimal data source with HA and Failover features
  • Multi Data Source
    • abstracts two or more Generic Data Sources; works like a 'pool of data sources' so you can use it for either failover or load balancing

JDBC Resources: DataSources and Connection Pools

In the first article this was sort of covered from a Java EE Standard point of view. I simply took advantage of the @DataSourceDefinition annotation type, which allows developers to define JDBC DataSources directly from the Java source code, and requires no vendor-specific deployment descriptors nor manual previous configuration of the application server.

Now in case you have a legacy application or you are not using @DataSourceDefinition, you will be required to migrate these resources by hand. This will require three (plus one optional) simple steps:

  1. List JDBC resources from a GlassFish domain
  2. (optional; see below) Install 3rd-party JDBC drivers in WebLogic
  3. Extract and convert relevant and required information by WebLogic
  4. Create datasources inside WebLogic
Oracle WebLogic 12c already comes with JDBC drivers for Oracle DB 11g, MySQL 5.1.x, and Derby DB, so you won't need to do anything for these databases. For more information, read the docs JDBC Drivers Installed with WebLogic Server. In this doc you will also learn how to update the versions already provided by WebLogic, for example if you want to take advantage of the new features in Oracle DB 12c

If you are using Microsoft SQL Server, PostgreSQL, or any other database, check the Setting the Environment for a Thirdy-Party JDBC Driver for more information on how to install these drivers.

Concepts of JDBC Resources

We should also learn one difference between the concept of JDBC Resources in GlassFish 3 versus WebLogic 12c. In GlassFish, there are two types of JDBC Resources:
  • JDBC Connection Pools
  • JDBC Resources (aka DataSources)
On the other hand, WebLogic treats JDBC Resources as one single thing: Data Sources. The connection pool is part of the data source definition where in GlassFish, the Data Source is a separate artifact, which allows enabling/disabling the object, and also provides the JNDI name to a specific Connection Pool. In few words, when migrating a data source from GlassFish to WebLogic, you will only care about the JDBC Connection Pool and the JNDI name given at the JDBC Resource item.

Listing JDBC Resources from a GlassFish domain

First, let's list all JDBC Resources (datasources) in our GlassFish server. Connect with asadmin and execute thelist-jdbc-resources command:

asadmin> list-jdbc-resources
Command list-jdbc-resources executed successfully.

Let's focus on our example: the jdbc/gf2wls datasource. This will be the DataSource we will migrate from GlassFish to WebLogic. Now let's list all Connection Pools in this GlassFish domain by using asadmin list-jdbc-connection-pools:

asadmin> list-jdbc-connection-pools
Command list-jdbc-connection-pools executed successfully.

Now of course in case you have dozens of connection pools created in your GlassFish domain, it would be easier to issue a command that shows you which connection pool is associated to the Data Source you want to migrate. To do this, let's use the asadmin get command:

asadmin> get resources.jdbc-resource.jdbc/gf2wls.*

We not only got which connection pool is associated to this data source but also its JNDI name, because the name of the resource may not be exactly the same as the JNDI name. 

Extracting GlassFish's JDBC Connection Pool data

Next step is to get all properties of your Connection Pool. Let's issue the asadmin get command again:

asadmin> get resources.jdbc-connection-pool.mysql_gf2wls_gf2wlsPool.*
Command get executed successfully.

Easy, isn't? Now, let's focus on the minimum required properties we need to create this DataSource in WebLogic 12c. They are under* , so if you want to list only these, change the asadmin method above to the following: asadmin get*

Create the Data Source in WebLogic using WLST

To help you witht he final step, I've created a sample WLST script to create a Data Source in WebLogic. In this script, there are a few variables you must define. To call this script, go to your WebLogic installation directory and, if you are on Linux, call $ source (or the proper script for your environment). Then execute the WLST script: $ java weblogic.WLST

You should see the following output:

$ java weblogic.WLST
Initializing WebLogic Scripting Tool (WLST) ...

Welcome to WebLogic Server Administration Scripting Shell

Type help() for help on available commands

Connecting to t3://localhost:7001 with userid weblogic ...
Starting an edit session ...
Started edit session, please be sure to save and activate your 
changes once you are done.
Saving all your changes ...
Saved all your changes successfully.
Activating all your changes, this may take a while ... 
The edit lock associated with this edit session is released 
once the activation is completed.
Activation completed

That's it. Check your WebLogic Console, by going to the Data Sources page.

Extending and improving the migration process

Now you may be wondering how to improve the process by automating everything, right? Yes you can do that! Since we have been using CLI commands, it all depends now on you by tweaking and coding some bash scripts. For example, you can use asadmin to get the information of all Data Sources, generate a bunch of files, usesed to, you know, hack the output files, then loop through them and call a more dynamic WLST script. If you want to read files from WLST, here's a fragment you can use:

from import FileInputStream

propIS = FileInputStream("")
configDS = Properties()


Migrating Advanced Settings

If you want to migrate advanced settings of the Connection Pool, take a look at the full list of properties I extracted from GlassFish in my sample Data Source. To change for example the Max Pool Size, tweak the WLST script and add the following:


cd('/JDBCSystemResources/' + dsName + '/JDBCResource/' + dsName + '/JDBCConnectionPoolParams/' + dsName)

Again, you can do whatever you want in WLST.

There you go! If you come up with a super awesome script to automate the whole process, let me know!

Monday Mar 03, 2014

Migrating a Java EE App from GlassFish to WebLogic

WebLogic is Oracle's strategic application server for the Java EE Platform. Since Oracle decided to focus on it for commercial support, and decided to leave GlassFish free of any ties with commercial decisions, I decided to bring this type of content to help GlassFish customers as well users to experiment, try, and evaluate Oracle WebLogic 12c (Java EE 6 certified).

But before getting down to the migration part, first thing you should learn is How to Install WebLogic 12c. For this migration tutorial in a developer environment, we will be using the Developer installation, but for production environments, we recommend the Full installation.

Full Installation
For full installation that can be used either in a production environment or in a developer environment, download the WebLogic Generic Installer and follow the steps descriped in the documentation for 12.1.2 on how to install WebLogic.

The difference between full and dev, is that full is targeted for any environment, and dev is well, for developers only. Oracle always recommend the full installation, but usually and specially for Java EE applications in a dev environment, the Development installation is enough. The good thing about it is the download size: less than 200Mb, and still you also get Oracle Coherence to play with. By the way, there is no licensing requirements for development purposes (either full or dev install), because WebLogic (and other Oracle products) are free for developers.

Required software

For this series of Migrating from GlassFish to WebLogic, I will be using NetBeans 8.0, GlassFish JDK 7, Oracle MySQL Community 5.6, and WebLogic 12.1.2. So make sure you have that software (except WLS for now) installed and configured in your system.

Developer Installation of WebLogic 12c

Let's get started by first installing WebLogic 12c for Developers. Instructions here are for Linux, but it is not that much different for Windows or Mac.
  1. Download WebLogic 12c ZIP Distribution for Developers (latest version: 12.1.2)
  2. Unzip it somewhere, for example:
    $ unzip -d /opt
  3. Go into the newly created directory
    $ cd /opt/wls12120
  4. Let's unpack the JAR files that were optimally compressed with pack200
    $ sh    // for Windows, call configure.cmd
  5. After the uncompression, configure script will ask you if you want to create a new domain. Say "yes" by pressing 'y', then [enter]
  6. Provide a username, a password, and then confirm again the password
  7. Wait for the domain to be created and started
In just a few minutes you will have WebLogic installed, configured, and running!

Test your WebLogic 12c Developer Installation

At this point, you should have a WebLogic domain configured, up, and running. You can access the Admin Web Console at the following URL: http://localhost:7001/console. It will ask for username/password you typed during install. Take a moment to explore the Admin Console. You can find more information at the official documentation for 12.1.2.

You may also find very useful to know you can manipulate all domain settings through the WebLogic Scripting Tool, a command-line interface for you to code in Python, and issue commands to view and edit all settings. In an upcoming version of WebLogic we will also provide a REST interface.

I will use WLST in the next posts in this series, so maybe you want to read more later.

How to Start/Stop WebLogic 12c

In order to start and stop correctly your WebLogic domain, you can either do that from an IDE such as NetBeans, or by running specific scripts. These scripts are located under the following path location:

  • $ sh
  • $ sh

The Beauty of Java EE 6

Now, instead of going through the process of creating a Java EE application, I coded a small application that covers a large set of Java EE 6 APIs and pushed it to this GitHub repository. It is an application using the following APIs:
  • CDI 1.0
  • JSF 2.1
  • Bean Validation 1.0
  • EJB 3.1
  • JPA 2.0
  • JAX-WS 2.2
  • JAXB 2.2
  • JAX-RS 1.1
The beauty of Java EE is that you will learn from this migration how good it is when you follow standards, and also the value of the platform. Simply put: we will migrate this application without touching any code. At least not for now. Let's first set some infrastructure requirements. For now, we must have a database.

JPA and Database setup

To facilitate things, and before you can run this application, make sure you have MySQL installed and running onlocalhost, and with a database named gf2wls with username/password gf2wls with all privileges. The project comes with a drop-and-create configuration when JPA (through EclipseLink) is initialized.

To setup this, connect as root to your local MySQL server and issue the following two commands:
  1. $ mysql -u root -p
  2. mysql> create database gf2wls;
  3. mysql> grant all privileges on gf2wls.* to gf2wls@localhost identified by 'gf2wls';
And you are set!

Import project to NetBeans, setup MySQL driver, and run it on GlassFish

Since this is an article about migrating from GlassFish to WebLogic, I will assume you know how to get this application running on GlassFish from NetBeans. But I will provide some highlights to make it work smoothless.

In order for the @DataSourceDefinition entry inside class InitializeSampleDataSessionBean work fine and connect to your MySQL database in GlassFish, make sure you have copied MySQL JDBC Driver into glassfish3/glassfish/domains/domain/domain1/lib/ext/ of course, before starting it up. In WebLogic, you don't need to do this since MySQL Connector/J is already part of the default installation.

Download the project 'bookmark-javaee6' to your local machine by either cloning the GitHub repository locally, or by downloading the zip and extracting somewhere. This is an Apache Maven project, so don't worry about environment. Just make sure you have this project up and running on a GlassFish domain.

Import the project bookmark-javaee6 into your NetBeans environment. Right click on bookmark-javaee6 project and select Run. Test the application by going to http://localhost:8080/bookmark-javaee6.

You should by now looking at the following screen:

Test the Bookmark WebService with a simple client

The sample Bookmark application comes with a JAX-WS WebService.

  1. You can test this WebService in many ways, but I will give you three main options: one is to try SoapUI
  2. Another option is to right click on the WebService in NetBeans, and select Test WebService
  3. Last option is to run the bookmark-javaee6-wsclient that comes with JUnit Test Cases. 
Make your choice, and see it working!

Running the sample Java EE 6 application in WebLogic 12c

Before we go to a pure Maven description on how to do this, let's give NetBeans a try. Now that you have everything ready (a Java EE 6 application running on GlassFish, with source code as a Maven project in NetBeans, let's add WebLogic as a Server to it.

  1. Go to the Services tab in NetBeans, and right click in Servers, then select Add Server....
  2. Select Oracle WebLogic Server
  3. Insert the path location of your recently installed WebLogic server. Remember to select the subfolderwlserver. If you installed as described in the beginning, you should try /opt/wls12120/wlserver
  4. Type your username and password of your WebLogic domain
  5. Finish this wizard
Now we must change from GlassFish to WebLogic in Project Properties. Select bookmark-javaee6 project and right click on it. Go to Run and select your newly created WebLogic 12.1.2 server. Press OK. See the picture below to understand what has to be done:

Start your project by right clicking in it, and select Run! Test your application running on WebLogic by going to the following location: http://localhost:7001/bookmark-javaee6

In case you had any problem, try these two articles:

Success! You have now the same application running on WebLogic 12c! Without any code change!

WebLogic understands GlassFish Deployment Descriptor

I haven't mentioned this before because I wanted you to see the sample application up and running on WebLogic, but what you can do in this application is to remove src/main/webapp/WEB-INF/weblogic.xml, and change the context-root inside glassfish-web.xml. What will happened if you redeploy this application without weblogic.xml, is that the application will start just fine, but in a different context-root: the one you typed inside glassfish-web.xml.

The reason for this is well documented on Support for GlassFish Deployment Descriptors. Give it a look in case you want to know what else does WebLogic understands from GlassFish's DD.

Now, let's try something different. Let's now use pure Apache Maven to compile and run the application on your WebLogic installation! For that, we will first need to configure the plugin.

Configuring the WebLogic Development Maven Plugin

Before you can use the plugin, you must install it in your local or remote Maven repository. Feel free to follow official instructions for WebLogic 12.1.2. But in case you want to just get it done, here's the short version:

  1. Go to your WLS installation. It is probably located here:
  2. Now change to the following directory:
    $ cd oracle_common/plugins/maven/com/oracle/maven/oracle-maven-sync/12.1.2
  3. Issue the following command to sync WLS Maven Plugin into your local repository:
    $ mvn -Doracle-maven-sync.oracleHome=/opt/wls12120/oracle_home/.
You have now successfully installed WLS Maven Plugin. To validate the installation, type:
$ mvn help:describe -Dversion=12.1.2-0-0

To continue, let's configure the plugin onto our bookmark-javaee6 sample application, and then deploy the package into WebLogic
  1. Open the POM file of bookmark-javaee6 project
  2. Uncomment the WebLogic Maven Plugin definition
  3. Make sure to enter the same username and password as your domain when you installed and configured WebLogic
  4. Make sure WebLogic is running
  5. Make sure there's no other bookmark-jaavaee6 project deployed on your WebLogic instance
  6. Execute the following command:
    $ mvn package pre-integration-test
  7. Check your logs and try http://localhost:7001/bookmark-javaee6!


As you could see, if you are working with a Java EE 6 project 100% standardized, and perhaps Maven, you will find no problems at migrating this project to WebLogic 12c. In fact, if you are using Maven it will be as simple as adding a new plugin just to facilitate deployment. But even this you won't have to do in case you have a binary only. Just open the Admin Web Console, and fire a deployment from there!

And by the way, WebLogic is not that heavyweight and unproductive application server developers thought it still is. For more information about Developer Productivity with WebLogic 12c, read my entry "WebLogic in Comparison: RebelLabs and the Java App Server Debate".

Caveats for Java EE projects, road ahead for migrations

In the next blog posts of this series, I will cover how to work around some common issues when your project is not exactly following, or taking advantage of all standards defined in the Java EE 6 platform, or simply using extra features, customizations of GlassFish.

Here's a sneak peek of what's coming next:
  • How to Migrate JDBC DataSources from GlassFish to WebLogic
  • How to Define, Deploy, and Use JMS resources
  • How to Migrate JMS resources from GlassFish to WebLogic
  • How to Add and Isolate (classpath of) 3rd-party libraries (for example PrimeFaces)
And many more things to come!
  • Applying a GlassFish Domain Topology to a WebLogic Domain (clustering, etc)
  • Migrating Security Realms
  • Migrating Custom Login Modules
If there's any other subject you'd like to see, please post a comment!


Friday Jan 24, 2014

Hackathon de Java e Raspberry Pi na CPBr14

Você que é desenvolvedor Java e vai para a Campus Party na semana que vem de 27 de Janeiro a 2 de Fevereiro de 2014, não pode perder o Hackathon de Java e RaspberryPipromovido pelo SOUJava, com apoio da Oracle, trazendo kits, premiação, e mentoring! O objetivo é aprender, praticar e inovar, e todos os participantes ainda vão ganhar uma camiseta. Um dos projetos será selecionado para apresentação no palco principal!

Presença de grandes nomes da comunidade Java brasileira como:

Para maiores informações, consulte o site do SOUJava Hackathon de Java e Raspberry Pi na Campus Party.

Monday Jan 13, 2014

Nova versão do Java para Janeiro 2014

À partir do dia 15 de Janeiro, estará disponível para os usuários a nova atualização do Java. O aviso já havia sido feito no ano passado, mas hoje saiu o anúncio pré-release do Critical Patch Update de Janeiro de 2014 com maiores detalhes. Os produtos relacionados ao Java (Java SE, Embedded, JavaFX, e JRockit) receberão 36 correções de segurança, das quais 34 podem permitir execução remota sem autenticação. Devido à ameaça representada por um ataque, a Oracle recomenda que os clientes apliquem correções Critical Patch Update assim que possível. Para usuários desktop que necessitam de Java para acessar sites que requerem a tecnologia, como Internet Banking, a atualização do Java é extremamente importante.

Esta atualização do Java é chamada de "Java SE 7u51" ou "Java SE 7 update 51" e vem com uma importante novidade. Usuários podem agora indicar manualmente quais sites são confiáveis. Desta forma, os avisos de segurança não serão exibidos, pois fica entendido que o usuário confia no site. Para saber mais sobre esta funcionalidade, leia o documento Como posso configurar a Lista de Sites de Exceção? na Central de Ajuda do Java em português. Ou veja também aqui no meu blog um post sobre esta nova feature. Outra mudança importante nesta nova versão do Java é que todos os aplicativos Java que precisam ser executados no navegador, à partir de uma página Web, deverão ser assinados digitalmente com um certificado válido. Para saber mais, veja este outro post Mudanças no Java SE 7u51 para Applets e Web Start.

Além do Java, outros produtos da Oracle receberão diversas atualizações e correções de segurança neste lançamento, como Oracle VM VirtualBox, Oracle MySQL, Oracle Database, Oracle Fusion Middleware, e muitos outros. Para maiores informações, consulte o pre-release do anúncio do Critical Patch Update de Janeiro de 2014

Friday Jan 10, 2014

Novo Java 7u51 e os Internet Banks no Brasil

Science Duke

UPDATE: Novo post com detalhes sobre a nova atualização do Java. Clique aqui.

O ano de 2013 foi conturbado para o Java, mas a Oracle resolveu e corrigiu uma série de falhas de segurança. Muitas destas correções foram relacionadas ao funcionamento do Java Browser Plugin, que integra com os navegadores Web e permite a execução de aplicativos Java a partir de páginas HTML.

Agora, 3 meses após a última atualização Java 7u45, na próxima semana teremos o lançamento do update 51. Esta nova atualização virá com mais algumas correções e uma série de novidades, mas talvez a mais importante delas chama-se Exception Site List (documentação em Português), destinada para os usuários finais.

Na atualização 40, incluimos a feature Deployment Rule Set, destinada a administradores de estações de trabalho corporativas para oferecer esta funcionalidade com facilidade de implantação. Para usuários finais, a feature Exception Site List permite uma configuração por interface gráfica bem simples. Assim como no DRS, esta funcionalidade permitirá que usuários configurem em seus computadores os domínios Web nos quais eles confiam. Por exemplo, um usuário pode digitar e o Java irá confiar nos Applets (e também aplicativos Java Web Start) hospedados nestes sites.

Comparação do Exception Site List com Deployment Rule Set

A introdução da Exception Site List cria um segundo caminho para confiar (whitelist) em RIAs (Applets e JWS) e diminui as exigências para administradores de sistema.

 Exception Site List
Deployment Rule Set
 Desde quando?  Java 7 update 51 (Janeiro 2014)
 Java 7 update 40 (Setembro 2013)
 Destinado a
 Usuário final  Administrador de Sistemas
 Forma da configuração
 Interface gráfica  Arquivo JAR assinado
 Se os dois conflitarem


 Para aplicação de políticas padrão de segurança, alguns administradores de sistema podem bloquear o uso da Exception Site List como fariam com qualquer outra configuração do painel de controle.

Adicionando um site à Lista de Exceção

Usuários finais podem acessar esta funcionalidade à partir do painel de controle do Java.

  1. Abra o painel de controle do Java
    1. Windows/Mac - abra o painel de controle do sistema ou as Prefeências do Sistema, e escolha Java
    2. Linux/Solaris - Execute o comando jcontrol
  2. Clique na aba Segurança
  3. Clique em "Gerenciar Lista de Sites" / 
  4. Uma nova janela aparecerá

  5. Clique no botão Adicionar / Incluir

  6. O endereço não deve conter nome de arquivo no final:
    • Correto:
    • Errado:
  7. Clique em OK. A janela irá fechar. Talvez você veja uma janela de confirmação caso utilize um canal de comunicação não-criptografado como http://. Prefira sempre o procolo https//.
  8. De volta ao painel de controle do Java, clique em OK para fechar.
  9. Recarregue a página onde está a aplicação Java, no seu navegador.

Distribuição da Exception Site List

Apesar de esta funcionalidade ser voltada a usuários finais controlando sua própria lista de exceções, quase todas as configurações de software podem ser automatizadas.

O arquivo que controla esta lista é armazenado no diretório do usuário descrito na configuração de deployment. Por exemplo, no Windows 7 este local é

O formato do arquivo é puro texto, uma URL por linha.

Veja também maiores informações sobre o uso de Deployment Rule Sets. Para manter-se informado sobre as mudanças no Java, acompanhe o blog (em inglês) Java Platform Group


Wednesday Jan 08, 2014

WebLogic in Comparison: RebelLabs Java Servers Report

RebelLabs did a great job comparing the main Java servers out there, where some are pure Servlet/JSP containers, others are full Java EE compliant. But they didn't want to include in the list Oracle WebLogic nor IBM WebSphere apparently for no logical reason but "they are suited for large enterprise production environments", and because the report is focused on developers.

"The Great Java Application Servers Debate"

So, I decided to write this blog post to include detailed information about WebLogic, since WLS is free for developers, even if you are going to deploy GlassFish/JBoss/Whatever in production. Which is why I didn't get why RebelLabs didn't want to compare WebLogic.

Remember, I will detail WebLogic from a "developer point of view", using the same categories RebelLabs used in their report. Here we go:

Download & Installation

WebLogic 12c is certified for Java EE 6, and 12.1.1 was released on Dec 2011. The second release is 12.1.2 and is from July 2013, part of the full Cloud Application Foundation 12c release. For developers, there is a ZIP distribution sized at 184Mb.
  1. Accept Licence agreement
  2. Download installation package *
  3. Extract the archive
  4. Run (Linux/Mac) or configure.cmd (Windows)
  5. You are ready to go!
* you must have an OTN account, required for other things like access Oracle Forums

The script will ask you if you want to create a domain. Say "yes". Then you are asked to provide username/password for it, because we do care about default security. And right after the script finishes creating the domain, you can point to http://localhost:7001/console, because the script will automatically start WebLogic for you. To start WebLogic again, just call: 
$ cd user_projects/domains/mydomain; sh
Conclusion: License accepted only once. Bigger than others indeed but enhanced default security. Starts server automatically right after creating domain.

Tooling support

The RebelLabs report says WebLogic is only integrated with JDeveloper. But that's a big mistake. WebLogic is well integrated with NetBeans, Eclipse, IntelliJ, and can even be used with Apache Maven and Ant. For a "big fat bloated enterprise production-only app server", I would say WebLogic is in very good shape for development environments.

Eclipse: you can either download Oracle Enterprise Pack for Eclipse bundled with Eclipse, or just the update by either downloading the repository, or pointing to the repository URL.

NetBeans: support comes out of the box since version 7.1 (released in January 2012). Here's an article hosted on about NetBeans and WebLogic.

IntelliJ IDEA: Jetbrains comes with native support for WebLogic not only version 12, but also older versions. 

Apache Maven: in release 12.1.2, Oracle WebLogic has an enhanced Maven support with more goals and easier installation into Maven repositories. Check the documentation to learn more.

Apache Ant: for several versions WebLogic has been coming with Ant support. And continues to do so. Check the documentation for 12.1.2

If you are developing with Eclipse, NetBeans, or JDeveloper, you can even enable FastSwap, a feature that reloads changed classes on the fly. I've blogged about how to enable and use FastSwap with NetBeans a while ago.

Conclusion: has support for 99,9999% of tools used by developers. FastSwap for on-the-fly class update. IntelliJ and NetBeans with OOTB support. Eclipse plugin or full distribution with OOTB support.

Server Configuration

In the report, RebelLabs gave GlassFish a score of 3, which is weird because the way they described this section, seems like everything is perfect. The "Reason" line gives no negative reason at all! So I asked them on Twitter.

In WebLogic, you can basically do everything through the Web console available in the Admin Server. From there you can create clusters, create new managed servers, add Java EE resources like JMS queues, Data Sources. You can create Work Managers, do Security management. Anything. But for developers that don't want to follow steps documented in Word files full of screenshots of all these Web interfaces, they can simply write a Python script, and whenever they have to configure something [again], all they need to do is to run the script. The feature is calledWebLogic Scripting Tool, or simply WLST, and several companies have been using this for many years. It's great for configuration automation and also manageability. If you want to record the commands you type in the WLST shell for future executions, call startRecording(). If you don't want to write a script from scratch, the Adminstration Web console comes with a "Recording" feature that will record all your actions and create the script for future executions. And you can also connect through JMX.

If you are really into XML configuration, you can access the domain folder, then edit theconfig/config.xml file and do your magic. But they will only take effect after a restart.

And finally, most changes don't require a server restart.

Conclusion: Python scripts. JMX. Rich web console. Recording features. XML. Most changes go live without restart.

Documentation & Community

Documentation for WebLogic is very complete, and the new 12.1.2 documentation website has an updated Look & Feel. It is easy to navigate and comes with a search (basic and advanced) feature. The community is not as small as you may think. Oracle runs the Oracle ACE program and highlights outstanding professionals all around the world. The Oracle Partner Network is also big, with several folks running meetings, bootcamps, hackathons, etc. Take for example the last edition of UK OUG Tech 13, where attendees developed Puppet modules during a WebLogic Hackathon. And finally there's an Oracle Forum for WebLogic which is ran by the Oracle Technology Network team. 

Community is not related to only Open Source products. Doesn't matter if it's Open Source or not, if there's enough people working with a product, there's a chance for a community be born.

Conclusion: There is a community. Not as know as Open Source ones. Widespread around the world. Decentralized.

Features & Open Standards compliance

WebLogic 12c is Java EE 6 Full profile certified. Customers can also develop rich web applications with Oracle ADF, and they also get extra features/support for TopLink, like Oracle Coherence Integration. TopLink can be seen as an extension of EclipseLink, the Open Source JPA implementation, maintained at the Eclipse Foundation, but with great contribution from Oracle. WebLogic 12c has also support for OSGi bundles.

For administrators and devops, in addition licensed customers gain several other products and support. So for example, if you are comparing WebLogic Standard Edition with JBoss, don't forget that WLS SE comes bundled with support for: 
  • Oracle HTTP Server (enhanced Apache)
  • Oracle TopLink/ADF
  • Configuration Wizard / Upgrade Framework / OPatch
  • Oracle Java SE
  • Oracle WebLogic Management Framework
  • WebLogic JDBC Drivers, Server Clients, Apache Plugin
  • HTTP Pub-Sub Server
If you want more details about what you get by buying WebLogic, see this table. It will show also what other flavours of WebLogic (Enterprise/Suite) have to offer.

Conclusion: of course 1 apple will be cheaper than 4. :-)

Conclusion: Java EE 6 and OSGi. Extra features/products for licensed customers starting since WebLogic Standard Edition. Most complete application server, with support for all products involved in a basic infrastructure for running server-side Java applications.

Administration & Management/UI

As I pointed in the "Server Configuration", WebLogic has several ways for the developer to configure whatever the dev wants. But to give you an impression, here's a screenshot of the Admin Console, to create a JDBC Data Source:
Conclusion: Rich web console. Allows to control, from the Admin Server, all resources, as well monitor and manage servers in one or more clusters.

Cost $$$ / Licensing

The pricelist is available publicly and can be easily googled. No secrets, full transparency, from how much you pay (at maximum, since there's always a conversation with the sales rep), to what you get in exchange. Remember: when you license and contract support for WebLogic Standard Edition, you pay per processor socket (not per core), and you get support for Oracle Java SE (JVM), Oracle HTTP Server (Apache), and several other features/products. Other editions are priced differently but come with even more features.

But anyway, WebLogic comes with no charge for developers.

Conclusion:  When comparing cost to other application servers, remember that WebLogic comes with supported JVM (Oracle HotSpot), support of an enhanced Apache (Oracle HTTP Server), and other things that most application servers don't offer when you license or subscribe for support.

The Results

I've seen developers running Tomcat or JBoss or GlassFish, and going into production with WebSphere or WebLogic. But with the information above, I say that, overall,  WebLogic has evolved a lot especially in the new 12c version, with a smaller ZIP distribution, easy and secure installation, enhanced Maven support, great features for managing, awesome tooling support, and most important, free for developers. And don't forget the community! 

If a developer wants to develop pure Java EE applications, WebLogic is a very strong candidate. Even if the customer is running WebSphere in production :-)

Tuesday Jan 07, 2014

Demoiselle Framework no WebLogic 12c

Pra quem não sabe, o Demoiselle é um framework que roda sob a plataforma Java EE 6, desenvolvido e mantido pelo SERPRO para ser usado em projetos de todas as esferas do Governo.

No dia 1 de Novermbro do ano passado (2013), foi lançada a versão 2.4.0 conforme o Twitter dos mantenedores do framework. Decidi então saber qual seria a dificuldade de rodar um projeto Demoiselle no Oracle WebLogic 12c.

O WebLogic 12c (versão 12.1.1) foi lançado em Dezembro de 2011 e é compatível e certificado na plataforma Java EE 6, mas foi no ano passado em Julho que recebeu um update (a versão 12.1.2) com uma série de novas features e algumas correções, completando assim o release 12c do Cloud Application Foundation, que serve de infraestrutura para toda a tecnologiaFusion Middleware da Oracle.

Criando um projeto de exemplo e um pacote WAR

Uma grande vantagem do Demoiselle é que é um framework desenvolvido inteiramente com Apache Maven, e possui archetypes para facilitar a criação de novos projetos. Para este teste, vou usar o seguinte archetype:
O comando para criar um projeto a partir deste archetype pode ser este:
$ mvn archetype:generate \ \
 -DarchetypeArtifactId=demoiselle-jsf-jpa \
 -DarchetypeVersion=2.4.0 \ \
-DartifactId=demoiselle-sample-2.4.0 \
 -Dversion=1.0.0-SNAPSHOT \
O nome do projeto será demoiselle-sample-2.4.0

Ajuste a configuração JPA do projeto

O Demoiselle vem com um arquivo persistence.xml no diretório src/main/resources/META-INF e este arquivo deve ser editado da seguinte maneira: 
  1. Comente a configuração que está ativa logo no início do arquivo (específica para JBoss)
  2. Descomente a segunda configuração para GlassFish, chamada "GlassFish 3 with JTA transaction"
  3. Modifique o JNDI do Data Source para o seguinte valor: jdbc/demoiselle

Geração do pacote WAR

Agora para ter um arquivo WAR pronto para ser instalado no WebLogic, basta gerar o pacote: 
$ mvn -Pglassfish3 package
Repare que especifico o profile chamado glassfish3. Isto porque o Demoiselle possui uma série de profiles para cada servidor de aplicação (tomcat6, tomcat7, glassfish3, jboss6, jboss7). No momento em que escrevo este blog, meu pedido para acrescentar o profile do WebLogic 12c ainda não foi aceito. Acompanhe o pull request no GitHub para maiores detalhes e atualizações.

Mas não tem problema especificar o profile já existente glassfish3, pois este atende às especificações do Java EE 6, e o WAR resultante funciona perfeitamente no WebLogic 12c. 

Agora você deve ter no diretório target do projeto, um arquivo chamado demoiselle-sample-2.4.0-1.0.0-SNAPSHOT.war. Anote o local e o nome deste arquivo para depois fazermos deploy deste artefato.

Download, Instalação, Configuração e Deploy no WebLogic 12c

Sobre como fazer download e como instalar o WebLogic, já escrevi em 2012, How to Install WebLogic 12c ZIP on Linux (em inglês). Se tiver alguma dúvida, comente no post!

Quanto à configuração, a única coisa que precisamos fazer é criar um Data Source apontando para um banco de dados. Desde a versão 10.3.3 o WebLogic já vem com o Derby como parte da instalação, permitindo assim configurar um Data Source para um banco de dados em memória. No WebLogic 12c, o Derby já está ativo e para criar um Data Source é bem fácil.

Primeiro, acesse o diretório onde o domínio foi criado, e depois inicialize o servidor:
$ ./
Agora acesse a URL do console administrativo Web no endereço http://localhost:7001/console. Informe o usuário/senha que você definiu durante a instalação (geralmente, é weblogic/welcome1). O passo-a-passo da configuração é bem simples:
  1. No menu esquerdo, clique em Services, Data Sources
  2. Clique no botão New
  3. Selecione a opção Generic Data Source
  4. Informe o valor jdbc/demoiselle nos dois campos texto (Name e também JNDI Name)
  5. Selecione o tipo de banco de dados Derby na combobox
  6. Clique em Next
  7. Na tela seguinte não há o que fazer. Clique em Next
  8. Na tela seguinte também não há o que fazer. Clique em Next
  9. Na tela onde diz "Connection Properties", informe o valor demoiselle no campo Database Name
  10. Nesta tela, informe localhost como o Host Name
  11. Nesta tela, informe demoiselle nos campos Username, Password, Confirm Password
  12. Clique em Next
  13. Na tela seguinte verifique os dados, e experimente a configuração clicando no botão Test Configuration
  14. Clique em Next
  15. Selecione o AdminServer e finalmente, clique em Finish
Agora você deve ter um Data Source chamado jdbc/demoiselle, de acordo com a configuração feita anteriormente no persistence.xml do projeto.

WLST - WebLogic Scripting Tool

O WebLogic vem com uma feature muito legal chamada WLST, que permite você escrever scripts em Python para automatizar tarefas administrativas no servidor de aplicação. Se você achou o passo-a-passo acima complicado, experimente rodar este script especificamente para criar o Data Source jdbc/demoiselle usando o Derby. O procedimento é simples:
  1. Faça download do arquivo no Gist
  2. Acesse a pasta do domínio WebLogic
  3. Digite o seguinte comando para incorporar as variáveis de ambiente do domínio WebLogic na shell:

    $ source bin/

  4. Digite o seguinte comando para invocar o script:

    $ java weblogic.WLST <caminho para o arquivo>/

Deployment da aplicação Demoiselle

Aproveitando o ambiente do domínio na sua shell (após executar "source bin/"), é muito simples fazer o deploy da aplicação. Execute o seguinte comando:
$ java weblogic.Deployer \  -username weblogic \  -password welcome1 \  -deploy <caminho para o projeto>/demoiselle-sample-2.4.0/target/demoiselle-sample-2.4.0-1.0.0-SNAPSHOT.war
Lembre-se de ajustar o usuário e senha do seu domínio WebLogic tanto no comando acima, quanto no script WLST. Por conveniência, deixei já o comumente utilizado u:weblogic p:welcome1.

Caso queira usar a interface Web, o processo é simples. Clique no menu Deployments, depois no botão Install e basta seguir as instruções da tela.

Testando a aplicação Demoiselle

Agora que a aplicação está rodando, você pode testar acessando a URL da aplicação, que provavelmente é esta: http://localhost:7001/demoiselle-sample-2.4.0-1.0.0-SNAPSHOT/index.jsf

Qualquer dúvida, é só comentar! Ou me procurar no Twitter @brunoborges. :-)



Thursday Dec 05, 2013

WebLogic agora é grátis para desenvolvedores!

Uma ótima notícia, que não é mais tão notícia assim, para todas as empresas desenvolvedoras de software, ISVs, fábricas de software, parceiros e não-parceiros Oracle. O WebLogic, servidor de aplicação Java EE líder de mercado pode ser baixado gratuitamente e utilizado em ambientes de desenvolvimento sem qualquer custo, através da licença da OTN. Conforme licença publicada no site, o trecho mais importante é este:

"[...] deploy the programs only on your single developer desktop computer (of any type, including physical, virtual or remote virtual), to be used and accessed by only (1) named developer."

Até então era comum acreditar que para desenvolver para uma grande empresa que adquiriu o WebLogic, seria necessário a empresa prestadora de serviço adquirir também o produto. Um exemplo comum é de empresas que desenvolvem software para outras empresas em forma de projetos (fábricas de software); estas empresas podem utilizar o WebLogic nas máquinas dos desenvolvedores sem qualquer custo Outro trecho interessante na licença da OTN é este:

"You may continue to develop, test, prototype and demonstrate your application with the programs under this license after you have deployed the application for any internal data processing, commercial or production purposes"
Veja a licença OTN completa para maiores informações

Se a sua empresa está em São Paulo, e vocês desenvolvem software para outras empresas que utilizam o WebLogic em produção, entre em contato para conhecer mais sobre o novo Oracle WebLogic 12c: bruno dot borges at oracle dot com.

Se ainda restam dúvidas sobre a simplicidade de instalar o WebLogic em ambientes de desenvolvimento, veja este outro blog post (em inglês) sobre como configurar o WebLogic distribuído em formato ZIP: How To Install WebLogic Zip on Linux!

Monday Nov 18, 2013

Você Está Pronto Para O Próximo Update do Java?

Oracle criou dois novos recursos, o 
Java RIA Security Checklist e o Java Security Resource Center para ajudar você a se preparar para a próxima atualização do Java SE, Java SE 7 update 51 (agendado para Janeiro de 2014). Esta versão modifica os requisitos de deployment para aplicações em Applet & Web Start com dois novos requisitos: 

  1. Uso do atributo Manifest, chamado Permissions
  2. Assinaturas de código válidas

Estas mudanças não afetarão desenvolvedores de aplicações back-end, ou cliente standalone; o escopo é limitado somente para Java Applets & Java Web Start (RIAs). Leia alguns destes detalhes no meu post anterior Mudanças no Java SE 7u51 para Applets e Web Start.

Java RIA Security Checklist

A mudança agendada para o Java SE 7u51 irá fazer com que o controle de segurança "default" (security slider) requererá o atributo Permissions no Manifest, e que o código esteja assinado devidamente com um certificado de código válido. O Java RIA Security Checklist
 provê as melhores práticas para ajudar os times de desenvolvimento a identificarem as tarefas necessárias para atender a estes novos requisitos.

Security Resource Center

A Oracle lançou o novo Java Security Resource Center para agrupar informações relacionadas a segurança para a comunidade Java, de acordo com o perfil de cada profissional: desenvolvedor, administrador de sistemas, usuário doméstico, ou especialista em segurança.

Recursos Adicionais


 Para garantir que sistemas de usuários finais (end users) estejam protegidos quando usando conteúdo baseado em Java, a Oracle recomenda que você esteja sempre atualizado para a mais recente versão. Você pode remover versões antigas do Java seja durante o processo de atualização, ou com usando a ferramenta Java Uninstall Tool em

Thursday Nov 14, 2013

O futuro do WebLogic 12c

Antes de falar do WebLogic 12c, uma informação importante é que prorrogamos o suporte do WebLogic 11g (versão 10.3.6) até 2018, e o suporte estendido até 2021. Isto dará maior tranquilidade aos clientes a planejarem suas migrações, reduzindo assim riscos e custos, principalmente aos clientes de Fusion Apps e SOA Suite/BPM. 

A versão atual do WebLogic 12c é a 12.1.2, lançada este ano em Junho, juntamente com todo o Cloud Application Foundation 12c (Coherence, Oracle HTTP Server, Tuxedo, etc). A versão anterior 12.1.1 já era certificada em Java EE 6, e agora esta nova versão traz uma série de recursos e funcionalidades para integrar suas aplicações com o banco de dados Oracle 12c, facilitar o operacional através de Dynamic Clustering e Elastic JMS, mais otimizações para Exalogic e JMS, administração do Oracle Coherence pelo console administrativo do WebLogic, plugins para desenvolvimento de projetos com Apache Maven, geração automática de serviços REST para seus projetos JPA com o TopLink RESTful Data Services, e muito mais.

O WebLogic 12.1.2 também substituiu o antigo instalador da BEA e os utilitários de patch BSU com o Oracle Universal Installer e o utilitário opatch para a aplicação de patches. Muitos clientes Oracle já conhecem estas ferramentas, que já eram utilizadas para outros produtos, como o próprio Banco de Dados.

Ou seja, uma série de novidades que justificam a liderança do WebLogic no mercado de Application Servers. Mas ao olhar os próximos passos e o roadmap para as versões do WebLogic 12.1.3 e 12.1.4, há motivo de sobra para se interessar na versão 12c.

A versão WebLogic 12.1.3 deverá ser a primeira homologada para diversos produtos 12c do FMW como SOA Suite 12c. Além disso, alguns novos recursos serão incluídos para melhorar ainda mais a experiência do administrador de infraestrutura para escalar ambientes com mais servidores. Por exemplo, a feature de Elastic JMS permitirá o uso do Server Migration sem perder mensagens durante esta execução. Estamos trabalhando para oferecer na versão 12.1.4 o suporte para auto-scaling de clusters dinâmicos, com base em limites e métricas definidas pelo usuário. O WebLogic 12.1.4 também deverá ter uma API para controlar os clusters dinâmicos. Desta forma, os usuários poderão facilmente programar a hora de parar, iniciar ou remover nós de um cluster dinâmico.

O WebLogic 12c conta com o driver JDBC 12c, oferecendo melhor integração com o Oracle DB 12c, e uma destas features é chamada de "Application Continuity". Esta feature permite que após uma falha de comunicação com um nó de um Oracle RAC, a transação com o banco de dados seja transferida sem qualquer efeito colateral para outro nó do cluster, garantindo disponibilidade. Na versão WebLogic 12.1.4, será introduzido também um novo recurso chamado de Multitenant Applications. Desta forma usuários poderão definir um modelo WebLogic para uma aplicação, para um ou mais clientes desta aplicação, que terá o seu próprio cluster, etc.

O conteúdo acima foi originalmente postado aqui.

AVISO LEGAL: O texto acima visa delinear nossa direção geral dos produtos. Destina-se apenas para fins informativos, e não pode ser incorporado em qualquer contrato. Não é um compromisso e não deve ser usado na tomada de decisões de compra. O desenvolvimento, lançamento e tempo dos recursos ou funcionalidades descritos para os produtos da Oracle permanecem a critério exclusivo da Oracle.

Wednesday Nov 06, 2013

6 Facts About GlassFish Announcement

Since Oracle announced the end of commercial support for future Oracle GlassFish Server versions, the Java EE world has started wondering what will happen to GlassFish Server Open Source Edition. Unfortunately, there's a lot of misleading information going around. So let me clarify some things with facts, not FUD.

Fact #1 - GlassFish Open Source Edition is not dead

GlassFish Server Open Source Edition will remain the reference implementation of Java EE. The current trunk is where an implementation for Java EE 8 will flourish, and this will become the future GlassFish 5.0. Calling "GlassFish is dead" does no good to the Java EE ecosystem. The GlassFish Community will remain strong towards the future of Java EE. Without revenue-focused mind, this might actually help the GlassFish community to shape the next version, and set free from any ties with commercial decisions.

Fact #2 - OGS support is not over

As I said before, GlassFish Server Open Source Edition will continue. Main change is that there will be no more future commercial releases of Oracle GlassFish Server. New and existing OGS 2.1.x and 3.1.x commercial customers will continue to be supported according to the Oracle Lifetime Support Policy. In parallel, I believe there's no other company in the Java EE business that offers commercial support to more than one build of a Java EE application server. This new direction can actually help customers and partners, simplifying decision through commercial negotiations.

Fact #3 - WebLogic is not always more expensive than OGS

Oracle GlassFish Server ("OGS") is a build of GlassFish Server Open Source Edition bundled with a set of commercial features called GlassFish Server Control and license bundles such as Java SE Support. OGS has at the moment of this writing the pricelist of U$ 5,000 / processor. One information that some bloggers are mentioning is that WebLogic is more expensive than this. Fact 3.1: it is not necessarily the case. The initial edition of WebLogic is called "Standard Edition" and falls into a policy where some “Standard Edition” products are licensed on a per socket basis. As of current pricelist, US$ 10,000 / socket. If you do the math, you will realize that WebLogic SE can actually be significantly more cost effective than OGS, and a customer can save money if running on a CPU with 4 cores or more for example. Quote from the price list:

“When licensing Oracle programs with Standard Edition One or Standard Edition in the product name (with the exception of Java SE Support, Java SE Advanced, and Java SE Suite), a processor is counted equivalent to an occupied socket; however, in the case of multi-chip modules, each chip in the multi-chip module is counted as one occupied socket.”

For more details speak to your Oracle sales representative - this is clearly at list price and every customer typically has a relationship with Oracle (like they do with other vendors) and different contractual details may apply.

And although OGS has always been production-ready for Java EE applications, it is no secret that WebLogic has always been more enterprise, mission critical application server than OGS since BEA. Different editions of WLS provide features and upgrade irons like the WebLogic Diagnostic Framework, Work Managers, Side by Side Deployment, ADF and TopLink bundled license, Web Tier (Oracle HTTP Server) bundled licensed, Fusion Middleware stack support, Oracle DB integration features, Oracle RAC features (such as GridLink), Coherence Management capabilities, Advanced HA (Whole Service Migration and Server Migration), Java Mission Control, Flight Recorder, Oracle JDK support, etc.

Update 24-11-2013:  clustering support is available on WebLogic Enterprise and Suite editions.

Fact #4 - There’s no major vendor supporting community builds of Java EE app servers

There are no major vendors providing support for community builds of any Open Source application server. For example, IBM used to provide community support for builds of Apache Geronimo, not anymore. Red Hat does not commercially support builds of WildFly and if I remember correctly, never supported community builds of former JBoss AS. Oracle has never commercially supported GlassFish Server Open Source Edition builds. Tomitribe appears to be the exception to the rule, offering commercial support for Apache TomEE.

Fact #5 - WebLogic and GlassFish share several Java EE implementations

It has been no secret that although GlassFish and WebLogic share some JSR implementations (as stated in the The Aquarium announcement: JPA, JSF, WebSockets, CDI, Bean Validation, JAX-WS, JAXB, and WS-AT) and WebLogic understands GlassFish deployment descriptors, they are not from the same codebase.

Fact #6 - WebLogic is not for GlassFish what JBoss EAP is for WildFly

WebLogic is closed-source offering. It is commercialized through a license-based plus support fee model. OGS although from an Open Source code, has had the same commercial model as WebLogic. Still, one cannot compare GlassFish/WebLogic to WildFly/JBoss EAP. It is simply not the same case, since Oracle has had two different products from different codebases. The comparison should be limited to GlassFish Open Source / Oracle GlassFish Server versus WildFly / JBoss EAP.

But the message now is much clear: Oracle will commercially support only the proprietary product WebLogic, and invest on GlassFish Server Open Source Edition as the reference implementation for the Java EE platform and future Java EE 8, as a developer-friendly community distribution, and encourages community participation through Adopt a JSR and contributions to GlassFish.

In comparison

Oracle's decision has pretty much the same goal as to when IBM killed support for Websphere Community Edition; and to when Red Hat decided to change the name of JBoss Community Edition to WildFly, simplifying and clarifying marketing message and leaving the commercial field wide open to JBoss EAP only. Oracle can now, as any other vendor has already been doing, focus on only one commercial offer.

Some users are saying they will now move to WildFly, but it is important to note that Red Hat does not offer commercial support for WildFly builds. Although the future JBoss EAP versions will come from the same codebase as WildFly, the builds will definitely not be the same, nor sharing 100% of their functionalities and bug fixes. This means there will be no company running a WildFly build in production with support from Red Hat.

This discussion has also raised an important and interesting information: Oracle offers a free for developers OTN License for WebLogic. For other environments this is different, but please note this is the same policy Red Hat applies to JBoss EAP, as stated in their download page and terms. Oracle had the same policy for OGS.


GlassFish Server Open Source Edition isn’t dead. Current and new OGS 2.x/3.x customers will continue to have support (respecting LSP). WebLogic is not necessarily more expensive than OGS. Oracle will focus on one commercially supported Java EE application server, like other vendors also limit themselves to support one build/product only. Community builds are hardly supported. Commercially supported builds of Open Source products are not exactly from the same codebase as community builds.

What's next for GlassFish and the Java EE community?

There are conversations in place to tackle some of the community desires, most of them stated by Markus Eisele in his blog post. We will keep you posted.

Tuesday Sep 10, 2013

Java SE 7 update 40 e o Mission Control 5.2

Java SE Downloads
Chegou uma nova atualização do Java SE 7: update 40. Esta versão inclui várias novas funcionalidades como o Java Mission Control, Deployment Rule Set, suporta para o Retina display no Mac, e suporte a Hard Float ABI no Linux ARM v7. Também inclui diversas correções de bugs. Para quem desenvolve Applets e aplicações Java Web Start, este release, fica a atenção para conhecer e enteder as mudanças.

Deployment Rule Sets

Esta funcionalidade permite um administrador de desktops a controlar o nivel de compatibilidade para clientes Java assim como níveis de segurança para a empresa. Para maiores detalhes, veja a documentação do Deployment Rule Set.

Java Mission Control

O Mission Control era até então uma ferramenta disponível para clientes Oracle, e que foi lançada há muito tempo atrás junto com o JRockit (JRMC). Mas a Oracle agora disponibilizou a ferramenta junto com a JRE HotSpot 7u40. 

Esta ferramenta permite monitorar, gerenciar, introspectar, e detectar memory leaks nas suas aplicações Java, sem ter que introduzir códigos para isso, que normalmente degradam a performance da aplicação. Hoje esta ferramenta está agora disponível no download do Oracle HotSpot JDK 7u40!

Flight Recorder

Mas a principal e mais importante característica é o Flight Recorder. Este recurso funciona através da leitura de eventos produzidos pela JVM. Mesmo ativando a geração destes eventos, a sobrecarga total  para as suas aplicações ainda fica abaixo de 2%, que considerando o tipo e o valor de informação que você recebe, é quase nada. Um exemplo de evento é a chamada de um método de uma classe Java.

Com o profile de chamadas de métodos você pode descobrir onde o aplicativo está gastando a maior parte do tempo executando seu código Java. Este é, por exemplo, útil para otimizar a aplicação onde as otimizações realmente terão impacto. Isto sem precisar introspectar seu código manualmente!

Alem disso, você tem também uma visão de otimização para alocação de objetos. Você pode ver por exemplo, a alocação em tempo real de objetos na Old Gen da memória heap. diretamente no espaço de idade, além de outras abas que oferecem diversas informações importantes sobre o processamento de informações na sua aplicação Java. Leituras de arquivos I/O, Socket I/O e muito mais.

Se você precisa de mais informações sobre o Mission Control, entre na página da ferramenta em

E obrigado ao Markus Eisele por ter cedido parte deste post! :-)

Monday Sep 09, 2013

Mudanças no Java SE 7u51 para Applets e Web Start

Science DukeA atualização do Java 7 update 51 (prevista para Janeiro, 2014) pretende incluir duas alterações de segurança desenhadas para melhorar a autenticação e autorização de aplicações Applets e Web Start. O controle de segurança slider do painel do Java está sendo atualizado para bloquear aplicações RIAs (Applets e Web Start) que não atenderem a estes novos requisitos. Importante: estas mudanças só se aplicam para RIAs, e não para Java no servidor ou em aplicações desktop fora do browser.


  • Você deve assinar todas as RIAs (Applets e aplicações Web Start)
  • Você deve definir o atributo "Permissions" dentro do Manifest
  • Sua aplicação será afetada se é inicializada a partir de um web browser. Sua aplicação não será afetada se ela é executada fora de um navegador web.

Informação completa poderá ser encontrada no release notes do Java 7 update 51, assim que for lançado em 2014.


A partir do Java 7u51 (Janeiro, 2014), RIAs devem ser atualizadas. As mudanças necessárias são no processo de empacotamento e distribuição; nenhuma mudança em código Java ou API é necessária. O estímulo para essas mudanças se refere à potencial abordagem de re-purposing de aplicações sandboxed, em que colocando permissões em um JAR assinado previne a modificação do seu nível de permissão definido. RIAs devem conter duas coisas:

  1. Assinatura de códigos de uma entidade verificadora confiável Trusted Authority. Todo o código para Applets e aplicações Web Start deve ser assinado, independente dos atributos de permissões.
  2. Atributos no Manifest
    1. Permissions - introduzido no Java 7u25, e obrigatório a partir do Java 7u51. Indica que uma aplicação RIA deve ser executada em modo sandboxed ou requerer todas as permissões.
    2. Codebase - introduzido no Java 7u25 e extremamente recomendável a partir do Java 7u51. Aponta para o local conhecido que hospeda o código (por exemplo:


Manifest-Version: 1.0
Created-By: 1.7.0_51
Permissions: sandbox 

Este arquivo manifest é criado quando o JAR  é empacotado, seja através do comando JAR, sua ferramenta de build, ou a sua IDE. 

Exemplo JNLP para apps Web Start

<?xml version="1.0" encoding="UTF-8"?>
<jnlp href="JavaDetection_applet.jnlp">
        <title>Java Detection</title>
        <vendor>Oracle Inc.</vendor>
        <jar href="JavaDetection.jar" />
          name="Java Detection Applet"
     <update check="background"/>

Veja o documento Development and Deployment of RIAs para maiores detalhes no formato do arquivo JNLP e o deployment toolkit. Para instruções sobre como assinar seu código, veja o tutorial Lesson: Signing Code and Granting It Permissions.

Administradores de Desktops

Se você é um administrador de desktops que gerencia instalações de softwares como o Java, em diversos computadores, considere o uso dos Rule Sets para cadastrar aplicações Java na whitelist. Deployment Rule Sets permite que você certifique que uma aplicação é conhecida como segura e confiável, mesmo que você não possa atualizar esta aplicação para atender a estes novos requerimentos.

Nota: este artigo foi publicado originalmente no blog do Java SE Product Management Team.

Thursday Sep 05, 2013

Install Fusion Middleware Infrastructure on Oracle DB 12c

This week I had the opportunity to play a little with the new and recently released Oracle DB 12c. This version brings a new approach for databases, calledPluggable Databases. There are plenty of articles and YouTube videos already explaining this and I will not focus this article on it. Instead, I want to help you on How to Install Oracle Fusion Middleware Infrastructure on Oracle DB 12c.
There are a couple of steps and commands to be followed, and some very important observations. Starting with a simple one:

Do NOT execute the RCU installer on top of a CDB.
One more time: do NOT execute RCU on top of a CDB. 

If you do point the RCU tool to install over a CDB, you might get this message:

ORA-65096: invalid common user or role name

Now with this in mind, I believe you have understood that the first step is, obviously, to create a PDB. There are some options, but I will use pure SQL commands.

Step 0 - Use the correct encoding for your Database install

Make sure you have installed your DB with the AL32UTF8 encoding. 
This is recommended, but it might work in case you are using something else.

Step 1 - Create a PDB to hold the FMW Infrastructure Data

The following command will create a PDB called PDBFMW with a user "fmw" and password "welcome1".


Please make sure to adjust the values to your installation. 

Step 2 - Open the PDB for changes

After you have the PDB created, make sure you change its state to READ_WRITE


Step 3 - Fix user privileges

Now you must make sure the user "fmw" has all required privileges. As this is for Development, I will just give everything.


* Important note: I'm not a DBA expert and these might not be the correct privileges for production environment. So please make sure to give only the necessary privileges following the documentation.

Step 4 - Run the RCU tool

This step considers that you have correctly installed Fusion Middleware Infrastructure into your Middleware Home / WebLogic installation folder. In my case, I'm using the full WebLogic + JDeveloper installation package, which brings the FMW Infra bundled. Now go to your $MW_HOME folder and run the RCU tool:

$ cd $MW_HOME
$ cd oracle_common/bin
$ ./rcu

Make sure to use the correct properties to connect to your recently created Pluggable Database:
Database Type: Oracle Database
Host Name: db12c (change to your DB IP address)
Port: 1521
Service Name: pdbfmw (here you use the PDB name)
Username: fmw
Password: welcome1 (or whatever you defined)
Click "Next" and see if it worked. If you are not using AL32UTF8, it will ask you to Ignore. Just do it, but remember: it might not work properly.

Step 5 - Select components and create new prefix

I like to select everything, and use the "FMW" prefix. Click "Next", "Next", "Next", etc, etc, etc... Until it finishes.


You have successfuly created the right database structure for your Fusion Middleware Infrastructure, and now you can create a WebLogic domain with ADF and everything else, pointing to this PDB.

If you have any question, post a comment!

Friday Aug 23, 2013

Java EE 7 OTN Tour 2013 Trip Report - Part 1/2

OTN Tour 2013 is over, and after 7 countries, all I have to tell you is this: #JavaEE7 rocks and people loved it! It is quite coincidence that at the end, I went to 7 cities in Latin America to give my "What's new in Java EE 7" talk plus the Hands-on Lab and other talks like the one about WebLogic 12c and another about GlassFish 4.

In reality, I had also planned to go to Panama City, and San José in Costa Rica. Well, things sometimes don't always go as planned, and I couldn't go to Panama. And when I got to Costa Rica, I was sent back to Mexico because I was not with my Yellow Fever card. But I'm looking forward to Java EE 9, if you know what I mean. :-) In the end, I visited 7 cities:
  • Mexico City, Mexico
  • Guadalajara, Mexico
  • Santiago, Chile
  • Lima, Peru
  • Montevideo, Uruguay
  • Buenos Aires, Argentina
  • São Paulo, Brazil
Now, before I talk about each city, let me explain something to you really important: OTN Tour is organized by LAOUC, the Latin America Oracle Users Community. And at each participant city, local OUGs help to organize, set a venue, local partners as sponsors, and also work with the speakers' agenda. Oracle does sponsor these events, both by supporting the local event,  as well by sponsoring Oracle ACEDs to travel with the tour. If you want to become an Oracle ACE, all you need to do is to learn about the Oracle ACE program.

We all know how Database-driven Oracle has been for the past decades, and we understand that most off the Oracle User Groups are more interested on Database stuff. But this is changing. There was a lot of interest during the whole tour on Middleware and Development technologies such as Java EE, ADF, WebLogic, and GlassFish. Dana Singleterry joined me in this tour and brought with him a lot of information on ADF 12c and ADF Mobile. Don't forget to follow him on Twitter.

By the way, this tour was great to improve my Spanish. Yeah, you read it: Spaaaanish. I'm from Brazil, and we speak Portuguese there. And Brazil is the only country in Latin America that speaks Portuguese. To improve my learning, at every country I visited I tried to learn local slangs. So for each city, I did a special slide for Java EE 7. Really, you gotta learn local slangs to be cool with a 2nd/3rd language :-P Anyway, it all started on July 21st in the morning...

Mexico City (DF), Mexico - July 26th

Like I told before, I could not go to Panama nor Costa Rica, so I stayed in Mexico the first week, and worked with Oracle folks there, did customer meetings, worked from hotel, etc. On Friday I finally started. Great venue at Egade Business School as well a very nice setup with coffeebreaks and lunch for everyone. Kudos to ORAMEX, the local OUG. In Mexico, I gave my Java EE talk, and did the Hands-on.
Spanish Lesson Part 1
By the way, chingar is a word in Mexican Spanish that means a lot of things, both for good or bad contexts. It can be used so widely that there is even a "chingonary", or a dictionary on how to use it, that I had to buy one for me in a local bookstore. In this case, it means "Java EE 7 has so many new technologies inside", but of course using a slang, almost a swearing word :P

Pictures: Facebook or Google+

Guadalajara, Mexico - July 27th

Guadalajara was not part of the official OTN Tour. Actually, it was an Oracle Java Day organized by the local Oracle office, with people from the Oracle Curriculum Development Team and where some of the great content of Oracle Learning Library is coming from. This conference was led by Edgar Martinez and I can't say how thankful I am. Edgar and his team did a great job. Everything was perfect: the great staff team, pizza for lunch, the office, the setup, the trail, and last but not least, the happy hour! Edgar blogged about this as a guest at Java blog, so you may want to read more about this there. Here I gave my Java EE 7 talk, and the hands-on. A lot of people showed up!

More pictures of the event on Flicker, my Facebook, and my Google+
Also, all the registration fee for this event was donated to a local orphans institute. Later, perhaps the best moment of it all: when we were walking on the street after the event looking for a place to dinner, we met with the supporters of this institute.


Santiago, Chile - August 1st

Santiago is an incredible city. It holds about 30% of the entire population of Chile, and I would guess perhaps more than 50% of the entire economy there. It is one of the most modern city, with great infrastructure and easy access to several touristic places. It was where I could enjoy a tourist-like day, so expect to see regular pictures. :P

Spanish Lesson Part 2
The term bacán in Chilean Spanish means "cool". I had to change my slide here.
The conference here happened at a very nice university, close to a subway station, and here I gave my Java EE 7 talk the hands-on again, and then the GlassFish in Production Environments. I met with great people here both from Oracle User Groups as well some people from the local Java community. It was also where I first met and talked to Tim Hall, really great guy, Oracle ACED, an expert on Oracle Database. If you have any questions about OraDB, follow him on Twitter and check his website,

Pictures: Facebook or Google+

Lima, Peru - August 3rd

One day after Santiago, I was flying to Lima for the third country of my list. Lima has really nice areas, like Miraflores so if you plan to visit Peru one day, make sure you stay there to enjoy the best view of the Pacific Ocean. For night life, visit Barranco, full of bars, restaurants, and nightclubs.

Here I gave my traditional Java EE 7 session, catch up with local Oracle people, and had perhaps one of the crowdest room in the whole tour. The question I made to the attendees in the picture below was: "Did you like the new stuff in Java EE 7? Raise your hand if yes!!!"

Pictures: Facebook or Google+

Spanish Lesson Part 3
The term chévere in Peruvian Spanish means "awesome". It is similar to bacán from Santiago, Chile. But people here prefer to be different. :-) So I had to change my slide again.

More next week
I still have to talk about was this tour in Argentina, Montevideo, and finally Brazil. But I will leave that for the next post.

By the way, to keep posted on this, follow me on Twitter! Or Google+... Or Facebook... :-)


Bruno has been having fun working with Java since 2000 and now helps Oracle on sharing the technology accross all Latin America. Also plays videogames, does trekking and loves beer.

Follow me on Twitter! @brunoborges


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