[rules-dev] How to work with Protobuf (.proto) files
Edson Tirelli
ed.tirelli at gmail.com
Wed Mar 21 12:30:30 EDT 2012
All,
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:
http://code.google.com/p/protobuf-dt/wiki/IntegrationWithProtoc
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:
http://code.google.com/p/protobuf-dt/wiki/ImportPaths
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
--
Edson Tirelli
JBoss Drools Core Development
JBoss by Red Hat @ www.jboss.com
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