These are the protobuf definition files used by hbase. The produced java
classes are generated into src/main/java/org/apache/hadoop/hbase/protobuf/generated
and then checked in. The reasoning is that they change infrequently.
To regenerate the classes after making definition file changes, ensure first that
the protobuf protoc tool is in your $PATH (You may need to download it and build
it first; its part of the protobuf package obtainable from here:
http://code.google.com/p/protobuf/downloads/list).
Then run the following (You should be able to just copy and paste the below into a
terminal and hit return -- the protoc compiler runs fast):
UNIX_PROTO_DIR=src/main/protobuf
JAVA_DIR=src/main/java/
mkdir -p $JAVA_DIR 2> /dev/null
if which cygpath 2> /dev/null; then
PROTO_DIR=`cygpath --windows $UNIX_PROTO_DIR`
JAVA_DIR=`cygpath --windows $JAVA_DIR`
else
PROTO_DIR=$UNIX_PROTO_DIR
fi
# uncomment the next line if you want to remove before generating
# rm -fr $JAVA_DIR/org/apache/hadoop/hbase/protobuf/generated
for PROTO_FILE in $UNIX_PROTO_DIR/*.proto
do
protoc -I$PROTO_DIR --java_out=$JAVA_DIR $PROTO_FILE
done
After you've done the above, check it in and then check it in (or post a patch
on a JIRA with your definition file changes and the generated files).
Optionally, you can uncomment the hadoop-maven-plugins plugin in hbase-protocol/pom.xml.
This plugin will generate for the classes during the build. Once again, you will need protocol buffers
to be installed on your build machine (https://developers.google.com/protocol-buffers)
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