Monday Feb 15, 2016

WebLogic on Docker Containers Series, Part 3: Creating a Domain Image

You already know how to quickly get started with WebLogic on Docker. You also learned with more details how to build an installation Docker image of WebLogic and Oracle JDK. This time, you will learn how to create a WebLogic Domain Image for Docker Containers.

We are pushing some interesting samples of Docker images on GitHub so this way WebLogic customers and users can have a good idea of what is possible (although not everything in there may be officially supported as of this moment, like multihost), but to experiment and learn more about Docker itself. This blog post focuses on the 1221-domain sample, but make sure to subscribe to this blog or follow me on Twitter for future posts that will look into the other samples.

I will also assume that you have the docker-images repository checked out and updated in your computer (with commit 4c36ef9f99c98), and of course you have Docker installed and properly working. Now moving on. 

WebLogic Domains

WebLogic uses a Domain concept for its infrastructure. This is the first thing a developer or administrator must create in order to be able to run a WebLogic Server. There are many ways to create a WebLogic Server Domain: using the Configuration Wizard, using WLST, or even bootstrapping the weblogic.Server class. Since we are using Docker and we want to automate everything, we create the domain with WLST.

TL;DR; Building the Domain Image in 1221-domain sample

First things first, make sure you have image oracle/weblogic:12.2.1-developer already created. If not, check Part 2 of this series to learn how. 

Now go into folder samples/1221-domain and run the following command:

$ pwd
~/docker-images/OracleWebLogic/samples/1221-domain
$ docker build -t 1221-domain --build-arg ADMIN_PASSWORD=welcome1 .
[...]
$ docker images
REPOSITORY              TAG                     IMAGE ID            CREATED             SIZE
1221-domain             latest                  327a95a2fbc8        2 days ago          1.195 GB
oracle/weblogic         12.2.1-developer        b793273b4c9b        2 days ago          1.194 GB
oraclelinux             latest                  4d457431af34        10 weeks ago        205.9 MB

This is what you will end up having in your environment. 

Understanding the sample WLST domain creation script

Customers and users are always welcome to come up with their own scripts and automation process to create WebLogic domains (either for Docker or not), but we shared some examples here to make things easier for them.

The 1221-domain sample has a subfolder named container-scripts that holds a set of handy scripts to create and run a domain image. The most important script though is the create-wls-domain.py WLST script. This file is executed when docker build is called, as you can see in the Dockerfile. In this sample, you learn how to read variables in create-wls-domain.py script with default values, that may be defined in the Dockerfile.

The script defined in this sample requires a set of information in order to create a domain. Mainly, you need to provide:

  • Domain name: by default 'base_domain'
  • Admin port (although WLS has 7001 by default when installed, this script defaults to 8001 if nothing is provided)
  • Admin password: no default. Must inform during build with --build-arg ADMIN_PASSWORD=<your password>
  •  Cluster Name: defaults to 'DockerCluster' 

Note about About Clustering

This sample shows how to define a cluster named with whatever is in $CLUSTER_NAME (defaults to DockerCluster) to demonstrate scalability of WebLogic on Docker containers. You can see how the Cluster is created in the WLST file.

Back to the domain creation

How to read variables in WLST with default values? Pretty simple:


domain_name = os.environ.get("DOMAIN_NAME", "base_domain")
admin_port = int(os.environ.get("ADMIN_PORT", "8001"))
admin_pass = os.environ.get("ADMIN_PASSWORD")
cluster_name = os.environ.get("CLUSTER_NAME", "DockerCluster")

These variables can be defined as part of your Dockerfile, or even passed as arguments during build if you are using Docker 1.10 with the new ARG command, as the ADMIN_PASSWORD example shows.

ARG ADMIN_PASSWORD
ENV DOMAIN_NAME="base_domain" \
ADMIN_PORT="8001" \
ADMIN_HOST="wlsadmin" \
NM_PORT="5556" \
MS_PORT="7001" \
CLUSTER_NAME="DockerCluster" \

Other variables are defined here (NM_PORT, MS_PORT, ADMIN_HOST), but I'll explain them later on a future post. Meanwhile, let's continue.

The next step as part of a domain image creation, is that you may want to reuse some Domain Template. In the sample script, we used the default template for new domains wlst.jar, but agan if you are working on your own set of domains feel free to use any template you may already have.

Next we tell WLST to configure the AdminServer to listen on all addresses that will be available (in the container), and to listen on port as in $ADMIN_PORT.

The 'weblogic' admin user needs a password that you had to provide with --build-arg (or defined directly inside Dockerfile) in $ADMIN_PASSWORD, and then we set that in the script.

For the sake of providing some examples, we also define a JMS Server in the script, but we only target it to the AdminServer. If you want to target to the Cluster, you will have to tweak your own script. 

The script is configured to set this domain in Production Mode too. 

We set some Node Manager options, since we will be using NM as Per Domain (see docs for more details). Remember that each instance of this image (a container) has the same "filesystem", so it is as if you had copied the domain to different servers. If you are an experienced WebLogic administrator, you will quickly understand. If not, please comment and I'll share some links. This is important to be able to run Managed Servers inside containers based on this image. I'll get back to this in the future on running a Clustered WebLogic environment on Docker containers.

There are a couple of other things we could've done in this script, such as:

  • Create and define a Data Source
  • Create, define, and deploy applications (this is demonstrated as part of the 1221-appdeploy sample)
  • And anything else you can do with WLST in Offline mode (remember that domain does not exist and thus is not running)

But sure you will quickly find out how to do these for your own domains.

Now that you have a domain Docker image 1221-domain, you are able to start it with:

 

$ docker run -ti 1221-domain

 

Now have some fun with tweaking your own WLST scripts for domain creation in Docker.

Wednesday Jan 06, 2016

WebLogic on Docker Containers Series, Part 2

On my previous post, the first part of this series, I've shown to you how to quickly get started with WebLogic on Docker. You've learned how to create a base Docker image with WebLogic and Oracle JDK installed, and then how to create a second image that contains a configured WebLogic domain. Today's post will break down and explain what happens behind the scenes of that process

Note: for the sake of history and keep this blog post useful in the future, I will refer to the commit 7741161 from the docker-images GitHub project, and version 12.2.1 of WebLogic.

Walking through the build process of a WebLogic base image

A base image of WebLogic means an image that contains only the software installed with minimum configuration, to further be extended and customized. It may be based on a Red Hat base Docker image, but preferably, we recommend you to use the Oracle Linux base image.

Samples for how to build a base image are presented in the dockerfiles folder. Files for WebLogic versions 12.1.3 and 12.2.1 are maintained there, as well for two kinds of distributions: Developer, and Generic. Other versions and distributions may be added in the future.

Differences between Developer and Generic distributions

There aren't many differences between them, except these (extracted from the README.txt file inside the Quick Installer for Developer):

WHAT IS NOT INCLUDED IN THE QUICK INSTALLER

- Native JNI libraries for unsupported platforms.
- Samples, non-english console help (can be added by using the WLS supplemental Quick Install)
- Oracle Configuration Manager (OCM) is not included in the Quick installer
- SCA is not included in the Quick Installer

Also, the Quick Installer for Developers is compressed using pack200, an optimized compression tool for Java classes and JAR files, to reduce the download size of the installer. Besides these differences, the two distributions work perfectly fine for Java EE development and deployment.

Building the Developer distribution base image

Although we provide a handy shell script to help you in this process, what really matters relies inside 12.2.1 folder and the Dockerfile.developer file. That recipe does a COPY of two packages, the RPM of JDK, and the WebLogic Quick Installer. These files must be present. We've put these .download files as placeholders to remind you of the need to download them. This same approach will apply for the Generic distribution.

The installation of JDK uses rpm tool, which enables us to run Java inside the base image. A very obvious requirement. After JDK is installed, we proceed with the installation of WebLogic by simply calling "java -jar", and later we clean up yum.

An important observation is the use of /dev/urandom in the Dockerfile. WebLogic requires some level of entropy for random bits that are generated during install, and as well domain creation. It is up to customers to decide whether they want to use /dev/random or /dev/urandom. Please configure this as desired.

You can build this image in two ways:

  1. Using buildDockerImage.sh script. Indicate you want developer distribution [-d], and version 12.2.1 [-v 12.2.1].

    $ pwd
    ~/docker-images/OracleWebLogic/dockerfiles
    $ sh buildDockerImage.sh -d -v 12.2.1


  2. Manually calling docker build:

    $ cd 12.2.1
    $ docker build -t oracle/weblogic:12.2.1-dev -f Dockerfile.developer .

Either of these calls result in the following:

REPOSITORY          TAG            IMAGE ID         CREATED          VIRTUAL SIZE
oracle/weblogic     12.2.1-dev     99a470dd2110     15 secs ago      1.748 GB
oraclelinux         7              bea04efc3319     5 weeks ago      206 MB
oraclelinux         latest         bea04efc3319     5 weeks ago      206 MB

As you may have know by now, this image contains only WebLogic and JDK installed, and thus does not serve to be executed, only to be extended.

Building the Generic distribution base image

Most of what you've learned from above applies to the Generic distribution. The differences are that you must download, obviously, the Generic installer. The installation process is a little bit different, since it uses the silent install mode, with environment definition coming from install.file and oraInst.loc.

To build this image you either do by:

  1. Call buildDockerImage.sh script. Indicate you want Generic distribution [-g], and version 12.2.1 [-v 12.2.1].

    $ pwd
    ~/docker-images/OracleWebLogic/dockerfiles
    $ sh buildDockerImage.sh -g -v 12.2.1


  2. Manually calling docker build:

    $ cd 12.2.1
    $ docker build -t oracle/weblogic:12.2.1 -f Dockerfile.generic .

Now you have two images you can extend from, either the Developer, or the Generic base image:

REPOSITORY          TAG            IMAGE ID         CREATED          VIRTUAL SIZE
oracle/weblogic     12.2.1         ea03630ee95d     18 secs ago      3.289 GB
oracle/weblogic     12.2.1-dev     99a470dd2110     2 mins ago       1.748 GB
oraclelinux         7              bea04efc3319     5 weeks ago      206 MB
oraclelinux         latest         bea04efc3319     5 weeks ago      206 MB

Note how the Generic image is larger than the developer image. That's because the Developer distribution contains less stuff inside, as described earlier. It will be up to Dev and Ops teams to decide which one to use. And how to build them.

In the next post, I will walk you through the process of building the 1221-domain sample image.

If you have any questions, feel free to comment, or tweet.

Monday Jan 04, 2016

WebLogic on Docker Containers Series, Part 1

WebLogic 12.2.1 is certified to run Java EE 7 applications, supports Java SE 8 (since 12.1.3), and can be deployed on top of Docker containers. It also supports Multitenancy through the use of Partitions in the domain, enabling you to add another level of density to your environment. Undeniably, WebLogic is so much of a great option for Java EE based deployments that both developers and operations will benefit from. Even Adam Bien, Java EE Rockstar, has agreed with that.

But you are here to play with WebLogic and Docker, so first, check these links about the certification and support:

Understanding WebLogic on Docker

We recommend our customers and users to build their own image containing WebLogic and Oracle JDK installed without any domain configured. Perhaps a second image containing a basic domain. This is to guarantee easier reuse between DevOps teams. Let me describe an example: Ops would provide a base WebLogic image to Dev team, either with or without a pre-configured domain with a set of predefined shell scripts, and Devs would perform domain configuration and application deployment. Then Ops get a new image back and just run containers out of that image. It is a good approach, but certainly customers are free to think out of the box here and figure out what works best for them.

TL;DR;

Alright, alright... Do the following:

1 - Download docker-images' master.zip file repository directly and drop somewhere.

$ unzip master.zip && mv docker-images-master docker-images

2 - Download WebLogic 12.2.1 for Developers and Oracle JDK 8 specific versions as indicated in Checksum.developer. Put them inside dockerfiles/12.2.1 folder. You will see placeholders there (*.download files).

3 - Build the installation image

$ cd docker-images/OracleWebLogic/dockerfiles

$ sh buildDockerImage.sh -d -v 12.2.1

4. Build the WebLogic Domain image

$ cd ../samples/1221-domain

$ docker build -t 1221-domain .

5. Run WebLogic from a Docker container

$ docker run -d -p 8001:8001 1221-domain

6. Access Admin Console from your browser: http://localhost:8001/console

Note that these steps are for your first image build only. Customers are encouraged to run a Docker Registry at their internal network, and store these images there just as they probably already do with Oracle software installers at some intranet FTP server. Important! Do not share binaries (either packed as a Docker image or not).

* follow this series if you want to learn more of WebLogic on Docker. But please do read the entire post... :-)

Creating your first WebLogic Docker Image

The very first step to get started, is to checkout the docker-images project on GitHub:

$ git checkout --depth=1 https://github.com/oracle/docker-images.git

If you don't have or don't want to install the Git client, you can download the ZIP file containing the repository and extract it. Use your browser, or some CLI tool.

Another thing to know before building your image, is that WebLogic comes in two flavors: one is the Developer distribution, smaller, and the other is the Generic distribution, for use in any environment. For the developer distribution, you have to download two files indicated inside Checksum.developer. If you want to build the Generic distribution instead of the Developer, see file Checksum.generic for further instructions, but tl;dr; you need two files again (or one if you have downloaded JDK already). The same instructions apply.

Next step is to go to the terminal again and use the handy shell script buildDockerImage.sh, which will do some checks (like checksum) and select the proper Dockerfile (either .developer or .generic) for the specific version you want, although I do recommend you start with 12.2.1 from now on.

$ cd docker-images/OracleWebLogic/dockerfiles
$ sh buildDockerImage.sh -d -v 12.2.1

You may notice that it takes some time to copy files during the installation process. That's because WebLogic for Developers is compressed with pack200 to be a small download. But after you build this image, you can easily create any domain image on top of it, and you can also share your customized image using docker save/load. Next step is to create a WebLogic Domain.

Creating the WebLogic Domain Image

So far you have an image that is based on Oracle Linux 7 and has WebLogic 12.2.1 for Developers, and Oracle JDK installed. To run WebLogic, you must have a domain. Luckily WebLogic is mature enough to be very handy for DevOps operations, and has support for a scripting tool called WLST (you guessed: WebLogic Scripting Tool), based on Jython (Python for Java) that allows you to script any task that you'd perform through a wizard or the web interface, from installation to configuration to management to monitoring. I've shared some samples on the GitHub project and I'll cover a couple of them in this series of WebLogic on Docker, but for now, let's just create the basic, empty WebLogic Domain.

Go to the samples folder and access folder 1221-domain. When there, just simply perform:

$ cd docker-images/OracleWebLogic/samples/1221-domain
$ docker build -t 1221-domain .


This process is very fast, at least for this sample. Time may vary if your WLST for creating a domain performs more tasks. See the sample create-wls-domain.py to have some ideas.

Starting WebLogic on Docker

You now have the image 1221-domain ready to be used. All you need to do is to call:

$ docker run -ti -p 8001:8001 1221-domain

And now you can access the Admin Console on http://localhost:8001/console.

Frequently Asked Questions, Part 1

- Can I write my own Dockerfiles and WLST scripts to install and create WebLogic?

A: absolutely! That is the entire idea of sharing these scripts. These are excellent pointers on what can be done, and how. But customers and users are free to come up with their own files. And if you have some interesting approach to share, please send to me at bruno dot borges at oracle dot com.

- Why is WebLogic Admin on port 8001 instead of default 7001?

A: Well, it is a sample. It is to show what configurations you can do. The environment variable ADMIN_PORT, as well other configurations in the samples/1221-domain/Dockerfile are picked up by the create-wls-domain.py script while creating the domain. The WLST script will even use some defaults if these variables are not defined. Again, it's a sample.

- What if I need to patch the WebLogic install?

A: you do that by defining a new Dockerfile and apply the patch as part of the build process, to create a new base image version. Then you recreate your domain image that extends the new patched base image. You may also want to simply extend your existing domain image, apply the patch, and use that one, or you can also modify your image by applying the patch in some existing container, then committing the container to a new image. There are different ways to do that, but for sure applying the patch to a live container is not one of them, since it is a good idea to keep containers as disposable as possible, and you should also have an image from where you can create new patched containers.

- What if I want a WebLogic cluster with Node Manager and Manged Servers?

A: that works too. I'll cover that in this series.

- Can I build a Docker image with a deployed artifact?

A: yes. More on that in upcoming blog posts of this series.

- Can I have a Load Balancer in front of a Swarm of Docker containers?

A: yes. That will also be covered as part of this series.

I hope you are excited to learn more about WebLogic on Docker.
So please follow this blog and my Twitter account for upcoming posts.

Thursday Jun 11, 2015

JavaOne, Oracle OpenWorld, e JUG Tour Brasil 2015

As palestras selecionadas para o JavaOne Brasil, e também para o Oracle OpenWorld Brasil, foram publicadas no site. O catálogo pode ser visto nos links abaixo:

Além de centenas de palestras, o evento contará também com 2 laboratórios práticos por dia, sobre diferentes temas como Java EE, JavaFX, e Java SE 8. Aqueles que adquirirem os pacotes do JavaOne poderão se inscrever sem custo adicional aos Hands-On Labs. Também teremos o NetBeans Day, no dia 22 de Junho durante todo o dia com diferentes palestras sobre desenvolvimento em Java e Cloud com a plataforma NetBeans. Para fechar toda a programação, encontros em mais de 15 JUGs por todo o Brasil também acontecerão, com palestras de speakers nacionais e internacionais, durante o 20 Days of Java Brazil JUG Tour 2015. Confira no site se o seu JUG faz parte do tour, e inscreva-se!

Inscreva-se no JavaOne!

Sunday May 31, 2015

Trip Report: Porto Tech Hub 2015

Porto Tech Hub is a new initiative by the city of Porto, in Portugal. A smart and very well organized and combined effort between the local Government and companies to push forward the Technology Industry in the region. And I was extremely happy to be part of this. The conference happened for one and a half day, and you can see by the Program that it held different topics, enabling and feeding the community with many different areas of interest.

The City of Porto is amazing. It was my first time in Portugal, and I must be thankful for you all people, or else I wouldn't exist. Second, I lived in Rio de Janeiro for 4 great years (now back in Sao Paulo though), so when I arrived in the region of Ribeira I found myself again in Rio by feeling the great atmosphere and seafood gastronomy. Whenever you go to Porto, make sure you go to the wineries to taste Port Wine (brought a few bottles back home)

I delivered the session Tweet for Beer - Beertap Powered by Java Goes IoT, Cloud, and JavaFX. Watch this demonstration if you don't know what's this about. It was fun to deliver a session in Portuguese outside Brazil. I did doublecheck with the audience if they could understand me, since Brazilian Portuguese is not exactly the same thing (Spanish though is different! Talking to you Americans... :-)

PS: after I delivered the session, I found out I was supposed to speak in English, since all speakers even the locals, were speaking English. I guess I got too excited with the idea of speaking with Portuguse audience :-)

The conference also had the presence of the awesome Christoph Engelbert (@noctarius2k) from Hazelcast, talking about In-Memory Distributed Computing. Dude, thanks for being an awesome travel companion, and for the two first pictures above.

Mensagem aos Amigos Lusitanos!

Obrigado a todos da organização pelo carinho especial, principalmente à Silvia e ao Jorge. Fui muito bem recebido e assistido por todos os envolvidos no evento. Muito legal também a participação da audiência durante a live demo do Tweet4Beer, enviando tweets e ganhando cervejas fictícias! E estou ansioso pela próxima edição. Sucesso a todos e até 2016!



Monday Apr 13, 2015

Nashorn Maven: Easy Library Classpath Setup

Nashorn is a great technology that comes embedded with Java 8. It is a Javascript engine that allows developers to code for the Java Platform, but using the Javascript language. What does that gives to you? Well, you can basically do whatever the Java Platform allows you to do, except you don't need to set a Java project, compile, and package with a JAR to do something cool.

For example, let's say you want to test the Streams API in JDK 8. In traditional Java development, even without an IDE, you'd have to open a text editor, create a Java class, then compile it with javac, and finally run it with java command. But you just want to try an API, right? So you'd rather prefer to skip that code/compile/run and just do... code/run!

Nashorn itself can be executed by different ways: you can use JSR 223 from within a Java program, and invoke the ScriptEngine API to eval Javascript code using Nashorn, or you can use the jjs command line tool. If you have JDK 8 installed, go to your prompt line, and type jjs, and play with the Nashorn console.

Now that you have got an idea of what Nashorn is and what jjs is, and you have realized you can use any Java API programming in Javascript, what about using 3rd-party libraries? Or your own libraries? Nashorn jjs accepts a parameter -cp to configure a classpath, just like java. But libraries are usually published as Maven artifacts, and have dependencies. You can of course download all the JARs necessary to run the library, and manually setup the classpath with old school jar1:jar2:jar3, but that's not optimal! So what would be the easiest way to code a Nashorn Javascript application that depends on a Maven artifact?

Introducing you project Nasven.js

nasven.js is a tiny Nashorn script that will invoke Maven on top of a POM generated based on a configuration file. It will then call the Dependency Plugin to download all the dependency tree of your application, setup the classpath, and then invoke jjs of your actual application with the full classpath properly configured for you, automatically!

Here's how it works:

1) First you setup a configuration file, for example appdef.js:

1 2 3 4 5 6
var appdef = {
main: "jaxrs.js",
options: "-scripting",
dependencies: ["org.glassfish.jersey.core:jersey-client:2.17",
"org.glassfish.jersey.connectors:jersey-grizzly-connector:2.17"]
}
view raw gistfile1.js hosted with ❤ by GitHub

 2) Then you code your application, that in this case depends on the JAX-RS Client API implemented by GlassFish's Jersey. For example jaxrs.js:

1 2 3 4 5
var ClientBuilder = Packages.javax.ws.rs.client.ClientBuilder;
var client = ClientBuilder.newClient();
var target = client.target("http://ip.jsontest.com/");
var response = JSON.parse(target.request().get(java.lang.String.class));
print("Your IP address is ${response.ip}");
view raw gistfile1.js hosted with ❤ by GitHub

3) Finally you just need to invoke nasven.js. But make sure you have Maven properly installed and configured (in your PATH) as well JDK 8 of course.


    $ jjs -scripting nasven.js -- appdef.js 

  Or

    $ ./nasven.js -- appdef.js

Docker Image

You can also use the Docker image nasven/nasven.js to run right out of the box. The image contains OpenJDK 8 and comes with Nasven.js and their samples, as well Maven installed and with most common dependencies already downloaded for you. Here's how you run on your laptop the JAX-RS Sample (confirm you have Docker already installed);


# docker run -it nasven/nasven.js /nasven/samples/jaxrs

And that's it! Let me know if you liked this! :-)

Learn more about Nashorn

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. 

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#!/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

UPDATE January 2016 - We now officially certify and support WebLogic 12.1.3 and WebLogic 12.2.1 on Docker Containers! For more information see this blog post and this whitepaper on OTN. The Docker configuration files are also now maintained on the official Oracle GitHub Docker repository. WebLogic 12.2.1 is also Java EE 7 and JDK 8 certified. Links in the Docker section of this article have also been updated to reflect the latest updates and changes.

For more up to date information on Docker scripts and support, check the Oracle GitHub project docker-images.


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? Sure yes! So to give you a great 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 OracleWebLogic for the Developer ZIP Distro Dockerfile on the Official Oracle GitHub repository for Docker images.

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 docker-images 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/docker-images/dockerfiles/12.1.3
  3. Call the ../buildDockerImage.sh script (as sudo) and wait for Docker to do its magic
  4. Call docker run -p 8001:8001 oracle/weblogic:12.1.3-developer and see WebLogic going up and running on a Docker container. 
    • It will attach port 8001 to your host interfaces
  5. Open http://localhost:8001/console. Username/password are weblogic/welcome1

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...

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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