As we started using Protobuf, it is important to know how you make changes to .proto files and how to compile them. Easiest way:

1. Download protobuf compiler from: http://code.google.com/p/protobuf/downloads/list

2. Install protobuf-dt eclipse plugin as detailed here: http://code.google.com/p/protobuf-dt/

3. Configure the destination directory to generate the java files as detailed in step 2 here:

Set the "Java Output Directory" to: src/main/java

4. VERY IMPORTANT FOR JBPM: jBPM Flow project has a .proto file that extends the data types defined in the .proto file in Drools Core, so you need to configure the protobuf import path as detailed here:

Add the following import paths to the jbpm-flow project:

${your drools-core project in eclipse}/src/main/resources

${your_drools_flow_project}/src/main/resources

   After doing that, when you edit and save the .proto files, eclipse will automatically compile and regenerate the java source code for them.

   Edson

 

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  Edson Tirelli
  JBoss Drools Core Development
  JBoss by Red Hat @ www.jboss.com