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WSO2 invites you to contribute by checking out the source from the Subversion (SVN) source control system, building the product and making changes, and then committing your changes back to the source repository. (For more information on Subversion, see http://svnbook.red-bean.com/). ) The following sections describe this process:

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Checking out the source 

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checkout checkout

You can download the complete WSO2 Carbon platform, which is recommended if you intend to modify the source. The Carbon project comes in three sub projects: Orbit, Kernel, and Platform. Download and build them in that specific order. You can check out the source code anonymously using the checkout command as shown in the following examples. Replace x.x.x with the version of Carbon you want to build and <local-x-directory>with meaningful names, such as: svn checkout https://svn.wso2.org/repos/wso2/carbon/orbit/tags/4.1.0 wso2carbon-orbit

Orbit:

$ svn checkout https://svn.wso2.org/repos/wso2/carbon/orbit/tags/x.x.x <local-orbit-directory>

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$ svn checkout https://svn.wso2.org/repos/wso2/carbon/platform/tags/x.x.x <local-platform-directory>

Access through a firewall

If you are behind a corporate firewall that is blocking HTTP access to the Subversion repository, you can try the developer connection to the trunk. For example:

$ svn checkout https://svn.wso2.org/repos/wso2/trunk/carbon wso2carbon

Access through a proxy

The Subversion client can be configured to access through a proxy. Specify the proxy to use in the "servers" configuration file in: 

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[global]
http-proxy-host = your.proxy.name
http-proxy-port = 3128

Building the product 

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build build

Following are the Apache Maven commands you can run to create complete release artifacts of WSO2 ESBthe product, including the binary and source distributions. If you only want to build the ESB, use the -Dproduct=esb option as shown. If you want to build the entire Carbon core project, omit the -Dproduct=esb option.

Before you build:

• Install Maven and JDK. See Installation Prerequisites for compatible versions.
  
• Set the environment variable MAVEN_OPTS=”"-Xms768m -Xmx3072m -XX:MaxPermSize=1200m”" to avoid the Maven OutOfMemoryError.
• Make sure the build server has an active Internet connection to download dependencies while building.

Setting up your development environment

Before you edit the source code in your IDE, set up your development environment by running one of the following commands:

Committing your changes 

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commit commit

If you are a committer, you can commit your changes using the following command (SVN will prompt you for your password):

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