Friday Nov 28, 2014

Oracle Linux Docker Base Image on Ubuntu 14.10

Oracle Linux team has been working hard to provide Docker support. You will be glad to see that they, since August, are releasing Docker binaries in Oracle Linux YUM repositories. Now recently they are also publishing the Oracle Linux Docker Base Images for OL6 and OL7! The documentation of Oracle Linux (OL6 and OL7) and Docker is also well advanced and explanatory. Keep track of everything about Docker and Oracle Linux from this yum page.

And why is this important you may ask? Well because it's definitely a required step if at some point the Fusion Middleware product teams move forward in certifying their products, such as WebLogic, on Docker as well. So if you want to work with Oracle products on Docker right now, although yet not certified nor supported, make sure you use the OL base images.

As a developer, I like to use Ubuntu Linux on my laptop. To use the OL7 Docker Base Image for example, I had to follow the following very short and easy steps:

  1. Make sure you have Docker installed on your Ubuntu environment

  2. Download the OL7 Base Image.

  3. Uncompress the file first with xz. You may find an issue where docker can't find the xz binary.
    $ sudo docker load -i oraclelinux-7.0.tar.xz
    2014/11/28 18:36:08 Error: Untar exit status 1 exec: "xz": executable file not found in $PATH

    $ unxz oraclelinux-7.0.tar.xz


  4. Load the image in your local Docker repository, as root, after extracting with xz (but keeping tar)
    $ sudo docker load -i oraclelinux-7.0.tar

  5. Check installation
    $ sudo docker images
    REPOSITORY     TAG  IMAGE ID       CREATED      VIRTUAL SIZE
    oraclelinux    7.0  5f1be1559ccf   2 weeks ago    265.2 MB


  6. Create and run a container based on this image
    $ sudo docker run -t -i oraclelinux:7.0 bash
Now have fun with Docker and Oracle Linux, and let me know if you create something cool with Fusion Middleware products!

Monday Oct 20, 2014

The Developers Conference 2014

Chegou ao fim a edição 2014 do The Developers Conference, com a última parada em Porto Alegre, que aconteceu entre os dias 16 e 18 de Outubro. E colocando na conta as cidades de Florianópolis, com 4 dias de evento no mês de Maio, e São Paulo com 5 dias de evento no mês de Agosto, a participação da Oracle no evento contou com 23 palestras de 15 papers em 12 trilhas, realizadas com muito empenho e dedicação por 5 palestrantes da Oracle.


A Oracle esteve presente nas seguintes trilhas de cada cidade:

Florianópolis - 15 a 18 de Maio  São Paulo - 5 a 9 de Agosto Porto Alegre - 16 a 18 de Outubro
Internet of Things  Internet of Things  Internet of Things
 Java  Arquitetura Java  Java University
 SOA & BPM  NoSQL  Mobile
 Games  Cloud  Cloud & DevOps
 Javascript  Javascript  Javascript
 Java EE  Java EE  Java EE

Fotos da participação da Oracle no TDC 2014

The Developer's Conference 2014 Florianopolis Edition
The Developer's Conference 2014 São Paulo
The Developer's Conference 2014 Porto Alegre

Palestras dos mais diversos assuntos, sempre alinhados com Padrões Abertos e Open Source. Veja abaixo todo o material apresentado pela Oracle no The Developers Conference 2014.

Palestras apresentadas

Foi sem dúvida, a maior participação da Oracle já registrada no TDC! E fica aqui meu muito obrigado aos amigos Marco Maciel, Denis Abrantes,  Fernando Ribeiro, e Giovani Bassan, que completaram o time de palestrantes desta edição. Todas as fotos do evento você pode encontrar diretamente nos álbums do próprio #TDC2014 no Facebook! Separei algumas fotos da Oracle no TDC 2014 Florianópolis, e que venha TDC2015!

Valeu pessoal!



JavaOne 2014 - Java Is What Java Does

Sunday Sep 21, 2014

WebLogic Encrypt Tool Script for Remote and Cloud Servers

One of the upcoming offerings of Oracle Java Cloud Service is a fully manageable instance of Oracle WebLogic in the Cloud. The service allows customers to manage a full instance of WebLogic the way they want. To do some tasks though, customers must connect through SSH to the server. Since security is important to us, WebLogic server is running Production Mode, and thus developers and operators are by default not allowed to use plain text passwords when executing WLST scripts, or deploying artifacts such as JDBC resources containing such plain text sensitive informations (you know... like... passwords!).

I've created this script to facilitate the encryption, and I'm quite sure it will be very useful to those Cloud operators and developers, but also for On Premise deployments where plain text passwords shouldn't be stored around on scripts and XML files. 

1 2 3 4 5 6 7 8 9 10 11 12 13 14
#!/bin/sh
# Util script to encrypt a password on a remote WebLogic domain through SSH
 
REMOTE_DOMAIN_HOME=/home/bruno/Work/tools/oracle/mw1212/user_projects/domains/base_domain
 
DIR="$( cd "$( dirname "$0" )" && pwd )"
 
PRIVATE_KEYFILE=~/.ssh/id_rsa
 
ssh bruno@localhost -i $PRIVATE_KEYFILE DOMAIN_HOME=$REMOTE_DOMAIN_HOME PASSWORD=$1 '/bin/bash -s' <<'ENDSSHSESSION'
cd $DOMAIN_HOME/bin
source setDomainEnv.sh
java weblogic.security.Encrypt $PASSWORD
ENDSSHSESSION

Let me know what you think! 

Thursday Jul 17, 2014

O Futuro do Java no Windows XP

Aviso Legal: Este texto foi traduzido do inglês para a sua conveniência. O texto original pode ser encontrado no post de Henrik Stahl, VP of Product Management for Java, "The Future of Java on Windows XP". Se houver qualquer discrepância entre esta versão e a versão original, dê prioridade para o texto original. Para outras dúvidas, consulte meu post Java FAQ Brasil.

Em Abril deste ano de 2014, a Microsoft anunciou o fim do suporte ao Windows XP. Como resultado direto, a Oracle anunciou que não mais dará suporte oficial para o Java no Windows XP. O que isso resulta é que um cliente com um contrato de suporte junto à Oracle pode ter que reproduzir um problema encontrado no Windows XP numa versão recente do Windows, e caso o problema seja específico ao Windows XP a Oracle não é obrigada (ou pode não ter os meios) para corrigir o problema ou oferecer uma solução de contorno (workaround).

 Este anúncio do fim do suporte tem sido interpretado incorretamente como "Java não funciona mais no Windows XP" ou "Oracle não irá disponibilizar mais atualizações para o Java no Windows XP". Estas afirmativas estão incorretas.

Nossa expectativa é que todas as versões do Java, que eram suportadas antes do anúncio de fim de suporte da Microsoft, continuarão funcionando no Windows XP num futuro próximo. Em particular, nossa expectativa é que o JDK 7 continuará funcionando no Windows XP. Atualizações de segurança lançadas pela Oracle continuarão sendo disponibilizadas para desktops com Windows XP. Usuários que fizerem o download do JDK 7 no java.oracle.com ou java.com continuarão podendo instalar no Windows XP.

JDK 8 não é suportado no Windows XP, e existem problemas conhecidos com o instalador para Windows XP que impedem de instalar o Java sem intervenção manual. Nós estamos buscando possíveis formas para resolver este problema mas talvez não o faremos - caso você esteja usando Windows XP talvez não valha a pena atualizar para o Java 8 sem atualizar também para uma versão recente do Sistema Operacional Windows.

O ponto importante aqui é que nós não podemos mais oferecer completa garantia do Java no Windows XP, já que este SO não é mais atualizado pela Microsoft. Nós fortemente recomendamos que usuários atualizem para uma versão recente do Windows que seja suportada pela Microsoft para manter um ambiente estável e seguro.

P: Eu recentemente li na Internet que a próxima atualização de segurança da Oracle para o JDK 7 não funcionará no Windows XP. Isto está correto?
R: Não. Não acredite em tudo que você lê na Internet.

P: Eu tenho um desktop/laptop com Windows XP. Continuarei recebendo atualizações automáticas do JDK 7 quando a Oracle lançar uma nova atualização de segurança?
R: Sim, ao menos até o End of Public Updates para o JDK 7 que no momento está agendado para Abril de 2015. Leia mais em Java Support Roadmap.

P: O que acontecerá após o End of Public Updates para o JDK 7?
R: Nós continuaremos monitorando as aplicações das atualizações no Windows XP. Se o uso continuar alto quanto chegarmos perto desta data, nós tomaremos medidas para manter usuários do Java seguros. Existem opções disponíveis ao nosso alcance caso isso se torne necessário.

P: Posso instalar JDK 8 no Windows XP? Vai funcionar? 
R: O instalador não funciona no Windows XP. Você pode descompactá-lo manualmente e provavelmente irá funcionar.

P: Minha empresa está usando Windows XP Embedded, que ainda é suportado pela Microsoft. A Oracle irá suportar neste caso?
R: Nós nunca suportamos oficialmente Windows XP Embedded para qualquer versão do Java. No entanto, desde que a Microsoft forneça suporte para o Windows XP Embedded, poderemos considerar isso. Entre em contato com um representante de vendas do Java na sua região se você tem uma necessidade para isso.

Monday Jun 30, 2014

Docker, Java EE 7, and Maven with WebLogic 12.1.3

WebLogic 12.1.3 was released and with it the support for perhaps the most important Java EE 7 APIs for database-backed Web Applications development. These are the specifications supported in this release:
As you can see above, WebLogic is bundled with the same implementations used by GlassFish 4.0, which gives you a compatible application server if you have already started developing Java EE 7 applications (well, of course limited to these APIs) and now seek for a commercially supported environment.

There are also some improvements in the Apache Maven Plugin, which makes developers' life much easier, allows for much better automated testing (Arquillian!), Continuous Integration and Delivery. IDEs that support Maven-based projects also benefit from this.

Does this makes WebLogic the best Java EE application server to run modern web HTML5/Javascript applications with RESTful and WebSockets services? Wouldn't be fair if I told you yes, now would it? So to give you a nice way to test WebLogic, I created a Dockerfile for you to in order to create a WebLogic domain on your development environment to test it as you wish. Go to the weblogic-docker for the Developer ZIP Distro Dockerfile on the WebLogic Community GitHub repository.

Getting started with WebLogic 12.1.3, Java EE 7, Maven, and Docker

Now let's get it started. First go to Oracle.com and download WebLogic 12.1.3 ZIP Distro for Developers. Save that file for later use.

Installing WebLogic 12.1.3 without Docker (easy)
WebLogic ZIP is very easy to install:
  1. Extract the content in a folder where you want to hold the wls12130 directory that comes inside the ZIP file. On my Linux machine, I use /home/bruno/Work/tools/.
  2. Go to the wls12130 folder and run the configure.cmd (Windows) or configure.sh (Unix).
    • Creating the domain may take too long and may be seen as the installer is freezed. Make sure to configure this if you are on Linux:
      $ export CONFIG_JVM_ARGS=-Djava.security.egd=file:/dev/./urandom
  3. When the installer asks you if you want to create a domain, type [Y]
  4. Installer will ask you for username/password. On dev environments, I usually use weblogic/welcome1
  5. Installer will start WebLogic right away and you can check it running at http://localhost:7001/console

Installing WebLogic 12.1.3 with Docker (easier)

If you work on a Linux-based machine as your development environment and you aren't familiar with Docker yet, check the What is Docker, then give it a try. Long story short: Docker is a Linux container; it is like a virtual machine, but it is not (there are people running Docker on top of Vagrant virtual machines, for example). The most important thing for us here is that it will create a virtual network interface with a virtual IP address.

My laptop runs Ubuntu 14.04, so I used this Docker Installation Instruction to set it up. I will assume you will have Docker installed on your computer somehow, following instructions for your own operational system.
  1. Download the ZIP or checkout the weblogic-docker Git repository and extract somewhere on your computer. I will use $DOCKER_HOME as a reference to that location.
  2. Copy the wls12130_dev.zip you download previously into $DOCKER_HOME/weblogic-docker/weblogic12c-zip/
  3. Call the build.sh script (as sudo) and wait for Docker to do its magic
  4. Call dockWebLogic.sh and see WebLogic going up and running on a Docker container. 
    • It will attach port 7001 to your host interfaces
  5. Open http://localhost:7001/console. Username/password are weblogic/welcome1
** Please be aware: we don't provide support for WebLogic on Docker in any environment so use this at your own risk. The developer distribution (ZIP) is only for development environments and also unsupported, as it is not patchable. If you still really want to run WebLogic 12c Full Distribution on top of Docker, here's a way to set it up.

Configuring your local Maven repository

It is now possible to use Maven without a local installation of WebLogic, which is perfect for CI environments (Hudson/Jenkins). You will still require a installation though to set up the Maven Plugin initially, but as soon you install this to your remote Maven repository for example, other developers and CI envs won't need to have WebLogic installed locally, if deploying to a remote server. For local development, you can also point to WebLogic as a "remote" server, of course. 

The steps to configure Maven are well documented and it is done by the Maven Synchronization Plug-in. After installing it to your local repository, you can call the sync goal to populate a local or remote repository. Here are the steps for a local environment:
  1. Go to the WebLogic home installation directory. For example:
    $ cd /home/bruno/Work/wls12130/
  2. Go to the subdir
    $ cd oracle_common/plugins/maven/com/oracle/maven/oracle-maven-sync/12.1.3/
  3. Execute the following command:
    $ mvn install:install-file -DpomFile=oracle-maven-sync-12.1.3.pom -Dfile=oracle-maven-sync-12.1.3.jar
  4. Finally you call the push command to upload all Maven artifacts (plugins, archetypes, etc) to your repository (local in this case)
    $ mvn com.oracle.maven:oracle-maven-sync:push -DoracleHome=/home/bruno/Work/wls12130/
If you want to setup a remote repository, check the documentation.

Create Java EE applications with WebLogic Maven Archetypes

WebLogic provides a set of archetypes that come with the Maven Plug-in pre-configured. Let's create a simple Web project by using the Basic WebApp Maven Archetype
mvn archetype:generate
    -DarchetypeGroupId=com.oracle.weblogic.archetype
    -DarchetypeArtifactId=basic-webapp
    -DarchetypeVersion=12.1.3-0-0
    -DgroupId=org.mycompany
    -DartifactId=my-basic-webapp-project
    -Dversion=1.0-SNAPSHOT
Now of course you can open this Maven project on your NetBeans, IntelliJ IDEA, Eclipse, and then setup WebLogic in your IDE. Or you can just issue the command below to build, package, and deploy this WAR artifact to the WebLogic server you have running on your computer (either using Docker or the normal installation):
mvn package pre-integration-test 
    -DoracleUsername=weblogic 
    -DoraclePassword=welcome1 
    -Dupload=true
Here we make sure to use -Dupload=true since I'm not sure if you are using Docker or not. If you are, then upload is required since the container has no access to your local file system (although possible!)

Description of wls_02.jpg follows

Now open http://localhost:7001/basicWebapp and see this sample application up and running!

Bonus!

By the way if you are an IntelliJ IDEA user you may want to watch this recent Webinar I did with JetBrains team: Developing Java EE Applications for WebLogic 12c with IntelliJ IDEA. The slides are available as well:

Check Bruno Borges slideshare repository


Monday May 26, 2014

Java FAQ: Tudo o que você precisa saber

Com frequência recebo e-mails de clientes com dúvidas sobre "quando sairá a próxima versão do Java?", ou então "quando vai expirar o Java?" ou ainda "quais as mudanças da próxima versão?". Por isso resolvi escrever aqui um FAQ, respondendo estas dúvidas e muitas outras. Este post estará sempre atualizado, então se você possui alguma dúvida, envie para mim no Twitter @brunoborges.

Qual a diferença entre o Oracle JDK e o OpenJDK?

O projeto OpenJDK funciona como a implementação de referência Open Source do Java Standard Edition. Empresas como a Oracle, IBM, e Azul Systems suportam e investem no projeto OpenJDK para continuar evoluindo a plataforma Java. O Oracle JDK é baseado no OpenJDK, mas traz outras ferramentas como o Mission Control, e a máquina virtual traz algumas features avançadas como por exemplo o Flight Recorder. Até a versão 6, a Oracle oferecia duas máquinas virtuais: JRockit (BEA) e HotSpot (Sun). A partir da versão 7 a Oracle unificou as máquinas virtuais, e levou as features avançadas do JRockit para dentro da VM HotSpot. Leia também o OpenJDK FAQ.

Onde posso obter binários beta Early Access do JDK 7, JDK 8, JDK 9 para testar?

A partir do projeto OpenJDK, existe um projeto específico para cada versão do Java. Nestes projetos você pode encontrar binários beta Early Access, além do código-fonte.

Quando acaba o suporte do Oracle Java SE 6, 7, 8?

Somente produtos e versões com release oficial são suportados pela Oracle (exemplo: não há suporte para binários beta do JDK 7, JDK 8, ou JDK 9). Existem duas categorias de datas que o usuriário do Java deve estar ciente: 
  • EOPU - End of Public Updates
    Momento em que a Oracle não mais disponibiliza publicamente atualizações
  • Oracle Support
    Política de suporte da Oracle para produtos, incluindo o Oracle Java SE
O Oracle Java SE é um produto e portando os períodos de suporte são regidos pelo Oracle Lifetime Support Policy. Consulte este documento para datas atualizadas e específicas para cada versão do Java. O Oracle Java SE 6 já atingiu EOPU (End of Public Updates) e agora é mantido e atualizado somente para clientes através de contrato comercial de suporte. Para maiores informações, consulte a página sobre Oracle Java SE Support.  O mais importante aqui é você estar ciente sobre as datas de EOPU para as versões do Java SE da Oracle.

Consulte a página do Oracle Java SE Support Roadmap e busque nesta página pela tabela com nome Java SE Public Updates. Nela você encontrará a data em que determinada versão do Java irá atingir EOPU.

Como funciona o versionamento do Java?

Em 2013, a Oracle divulgou um novo esquema de versionamento do Java para facilmente identificar quando é um release CPU e quando é um release LFR, e também para facilitar o planejamento e desenvolvimento de correções e features para futuras versões.

  • CPU - Critical Patch Update
    Atualizações com correções de segurança. Versão será múltipla de 5, ou com soma de 1 para manter o número ímpar. Exemplos: 7u45, 7u51, 7u55.
  • LFR - Limited Feature Release
    Atualizações com correções de funcionalidade, melhorias de performance, e novos recursos. Versões de números pares múltiplos de 20, com final 0. Exemplos: 7u40, 7u60, 8u20.

Qual a data da próxima atualização de segurança (CPU) do Java SE?

Lançamentos do tipo CPU são controlados e pré-agendados pela Oracle e se aplicam a todos os produtos, inclusive o Oracle Java SE. Estes releases acontecem a cada 3 meses, sempre na Terça-feira mais próxima do dia 17 dos meses de Janeiro, Abril, Julho, e Outubro. Consulte a página Critical Patch Updates, Security Alerts and Third Party Bulleting para saber das próximas datas. Caso tenha interesse, você pode acompanhar através de recebimentos destes boletins diretamente no seu email. Veja como assinar o Boletim de Segurança da Oracle.

Qual a data da próxima atualização de features (LFR) do Java SE?

A Oracle reserva o direito de não divulgar estas datas, assim como o faz para todos os seus produtos. Entretanto é possível acompanhar o desenvolvimento da próxima versão pelos sites do projeto OpenJDK. A próxima versão do JDK 7 será o update 60 e binários beta Early Access já estão disponíveis para testes. A próxima versão doJDK 8 será o update 20 e binários beta Early Access já estão disponíveis para testes.

Onde posso ver as mudanças e o que foi corrigido para a próxima versão do Java?

A Oracle disponibiliza um changelog para cada binário beta Early Access divulgado no portal Java.net.



Quando o Java da minha máquina (ou do meu usuário) vai expirar?

Conheçendo o sistema de versionamento do Java e a periodicidade dos releases de CPU, o usuário pode determinar quando que um update do Java irá expirar. De todo modo, a cada novo update, a Oracle já informa quando que este update deverá expirar diretamente no release notes da versão. Por exemplo, no release notes da versão Oracle Java SE 7 update 55, está escrito na seção JRE Expiration Date o seguinte:
The JRE expires whenever a new release with security vulnerability fixes becomes available. Critical patch updates, which contain security vulnerability fixes, are announced one year in advance on Critical Patch Updates, Security Alerts and Third Party Bulletin. This JRE (version 7u55) will expire with the release of the next critical patch update scheduled for July 15, 2014.
For systems unable to reach the Oracle Servers, a secondary mechanism expires this JRE (version 7u55) on August 15, 2014. After either condition is met (new release becoming available or expiration date reached), the JRE will provide additional warnings and reminders to users to update to the newer version. For more information, see JRE Expiration Date.
Ou seja, a versão 7u55 irá expirar com o lançamento do próximo release CPU, pré-agendado para o dia 15 de Julho de 2014. E caso o computador do usuário não possa se comunicar com o servidor da Oracle, esta versão irá expirar forçadamente no dia 15 de Agosto de 2014 (através de um mecanismo embutido na versão 7u55). O usuário não é obrigado a atualizar para versões LFR e portanto, mesmo com o release da versão 7u60, a versão atual 7u55 não irá expirar.

Veja o release notes do Oracle Java SE 8 update 5.

Encontrei um bug. Como posso reportar bugs ou problemas no Java SE, para a Oracle?

Sempre que possível, faça testes com os binários beta antes da versão final ser lançada. Qualquer problema que você encontrar com estes binários beta, por favor descreva o problema através do fórum de Project Feebdack do JDK.

Caso você encontre algum problema em uma versão final do Java, utilize o formulário de Bug Report. Importante: bugs reportados por estes sistemas não são considerados Suporte e portanto não há SLA de atendimento. A Oracle reserva o direito de manter o bug público ou privado, e também de informar ou não o usuário sobre o progresso da resolução do problema.

Tenho uma dúvida que não foi respondida aqui. Como faço?

Se você possui uma pergunta que não foi respondida aqui, entre em contato pelo meu Twitter @brunoborges e eu tentarei responder neste artigo.

Wednesday May 14, 2014

Oracle no #TDC2014 Florianópolis

Este ano a presença da Oracle no The Developers Conference 2014 - Edição Florianópolis vai fazer a diferença! Sem contar que fomos até mencionados pelo Cacau Menezes, grande figura da região da Ilha da Magia. Vejam só o que ele disse em seu blog:
"Já pensou em controlar uma torneira de chopp via dispositivos móveis e ser avisado pelo Twitter quando você já tomou todas? Pois é, essa ideia se tornou realidade pelos profissionais da gigante tecnológica Oracle Bruno Borges (@brunoborges) e Marco Antonio Maciel (@marcomaciel)." - Cacau Menezes

Enfim, estaremos presente no evento com as seguintes palestras e trilhas:

Trilha Games - Quinta
15:40 - Como criar o game 2048 em JavaFX

Trilha Javascript - Quinta
17:40 - Nashorn: novo motor Javascript no Java

Trilha Java EE - Sexta
10:10 - Criando uma aplicação HTML5 com Java EE 7 e WebSockets

Trilha SOA & BPM - Sexta
15:40 - Integrando Oracle BPM com Java EE e WebSockets

Trilha Java - Sábado
10:10 - Migrando de Applets para JavaFX, e novos modelos de distribuição de aplicativos Java

Trilha Internet das Coisas - Domingo
15:40 - Controle de Eventos em Tempo Real através de Java Embarcado
17:40 - Tweet para cerveja! Torneira de chopp controlada por Java, JavaFX, e IoT!

Se você quiser saber mais sobre os palestrantes da Oracle que estarão presentes no evento, acompanhe o Giovani Bassan, o Marco Maciel, e o Bruno Borges (eu) no LinkedIn :-) E acompanhe no Twitter com a hashtag #TDC2014!

Este post foi originalmente publicado em Just Blogging by Bruno Borges

Tuesday Apr 08, 2014

JavaOne 2014 na faixa, 0800, grátis!

Existem muitas coisas interessantes sobre o JavaOne, a maior conferência de Java deste planeta. Talvez a oportunidade de ficar sabendo em primeira mão sobre grandes lançamentos, ou ouvir sobre novas formas de utilizar a tecnologia, ou ainda conversar com desenvolvedores de todo o mundo, ou melhor: conhecer pessoalmente aqueles com quem conversamos somente por redes sociais e mailing lists. E é claro, a oportunidade de conhecer San Francisco, e o Vale do Silício: os escritórios da Oracle, do Google, da Apple, ou até da Microsoft. :D


Se você nunca foi ao JavaOne, mas tem muito interesse, curiosidade, e muita disposição (são várias sessões, e muitos eventos pós-sessões como happy hours, shows musicais, hackathons, etc!), e quer uma ajudinha para ir no evento, um bom patrocínio, existem duas formas de você fazer isso. A melhor opção é participar do JavaOne 2014 IoT Developer Challenge!.

Continue lendo o post...

Saturday Mar 29, 2014

Get all countries using Java SE 8 Locale

I saw this blog post "Get all the country using Java Locale List" and then I thought about posting something similar, but using Lambda and the Stream API of Java SE 8. Here's my "fork", including a call to sort the locales based on "display country" property.

Continue reading...

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
jdbc/__TimerPool
jdbc/__default
jdbc/gf2wls
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
__TimerPool
DerbyPool
mysql_gf2wls_gf2wlsPool
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.*
resources.jdbc-resource.jdbc/gf2wls.enabled=true
resources.jdbc-resource.jdbc/gf2wls.jndi-name=jdbc/gf2wls
resources.jdbc-resource.jdbc/gf2wls.object-type=user
resources.jdbc-resource.jdbc/gf2wls.pool-name=mysql_gf2wls_gf2wlsPool

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.*
resources.jdbc-connection-pool.mysql_gf2wls_gf2wlsPool.property.portNumber=3306
resources.jdbc-connection-pool.mysql_gf2wls_gf2wlsPool.property.serverName=localhost
resources.jdbc-connection-pool.mysql_gf2wls_gf2wlsPool.property.databaseName=gf2wls
resources.jdbc-connection-pool.mysql_gf2wls_gf2wlsPool.property.User=gf2wls
resources.jdbc-connection-pool.mysql_gf2wls_gf2wlsPool.property.URL=jdbc:mysql://localhost:3306/gf2wls?zeroDateTimeBehavior=convertToNull
resources.jdbc-connection-pool.mysql_gf2wls_gf2wlsPool.property.driverClass=com.mysql.jdbc.Driver
resources.jdbc-connection-pool.mysql_gf2wls_gf2wlsPool.property.Password=gf2wls
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 resources.jdbc-connection-pool.mysql_gf2wls_gf2wlsPool.property.* , so if you want to list only these, change the asadmin method above to the following: asadmin get resources.jdbc-connection-pool.mysql_gf2wls_gf2wlsPool.property.*

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 setDomainEnv.sh (or the proper script for your environment). Then execute the WLST script: $ java weblogic.WLST ds_gf2wls.py

You should see the following output:

$ java weblogic.WLST ds_gf2wls.py
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 java.io import FileInputStream

propIS = FileInputStream("MyGFDS.properties")
configDS = Properties()
configDS.load(propIS)

dsName=configDS.get("dsName")
dsFileName=configDS.get("dsFileName")
dsDatabaseName=configDS.get("dsDataBaseName")
datasourceTarget=configDS.get("datasourceTarget")
dsJNDIName=configDS.get("dsJNDIName")
dsDriverName=configDS.get("dsDriverName")
dsURL=configDS.get("dsURL")
dsUserName=configDS.get("dsUserName")
dsPassword=configDS.get("dsPassword")
dsTestQuery=configDS.get("dsTestQuery")

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:

dsMaxPoolSize=25

cd('/JDBCSystemResources/' + dsName + '/JDBCResource/' + dsName + '/JDBCConnectionPoolParams/' + dsName)
cmo.setMaxCapacity(dsMaxPoolSize)

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 3.1.2.2Oracle 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 wls1212_dev.zip -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 configure.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:

/opt/wls12120/user_projects/domains/mydomain/bin
  • $ sh startWebLogic.sh
  • $ sh stopWebLogic.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 3.1.2.2

Since this is an article about migrating from GlassFish to WebLogic, I will assume you know how to get this application running on GlassFish 3.1.2.2 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 3.1.2.2), 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:
    /opt/wls12120
  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 com.oracle.maven:oracle-maven-sync:push -Doracle-maven-sync.oracleHome=/opt/wls12120/oracle_home/.
You have now successfully installed WLS Maven Plugin. To validate the installation, type:
$ mvn help:describe -DgroupId=com.oracle.weblogic-DartifactId=weblogic-maven-plugin -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!

Conclusion

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!

Cheers!

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 https://www.sitedomeubanco.com.br 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
 Perde

 Ganha 


 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: https://www.meubanco.com.br/ib/
    • Errado: https://www.meubanco.com.br/ib/pagina.html
  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
C:\Users\%USER%\AppData\LocalLow\Sun\Java\Deployment\security\exception.sites

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

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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 configure.sh (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 configure.sh 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 startWebLogic.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 netbeans.org 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 :-)

About


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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