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zpencer ab85c5ae76 Start 1.7.0 development cycle (#3357) 
This bump changelist is applied a bit late with respect to the
1.6.0 branch cut. Look at the 1.6.0 to see the source of truth of
where it was cut. Do not assume it is the commit that precedes
this one.
 		2017-08-22 12:29:03 -07:00
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src Start 1.7.0 development cycle (#3357) 2017-08-22 12:29:03 -07:00
BUILD.bazel build: Add Bazel java_grpc_library rule 2017-06-22 13:06:49 -07:00
Dockerfile all: bump to proto 3.3.1 2017-05-23 17:04:51 -07:00
README.md compiler: update path to protoc plugin in README 2017-02-23 12:55:55 -08:00
build.gradle all: bump to proto 3.3.1 2017-05-23 17:04:51 -07:00
check-artifact.sh compiler: whitelist USER32.DLL. (#2455) 2016-11-28 17:45:11 -08:00

README.md

gRPC Java Codegen Plugin for Protobuf Compiler

This generates the Java interfaces out of the service definition from a .proto file. It works with the Protobuf Compiler (protoc).

Normally you don't need to compile the codegen by yourself, since pre-compiled binaries for common platforms are available on Maven Central. However, if the pre-compiled binaries are not compatible with your system, you may want to build your own codegen.

System requirement

  • Linux, Mac OS X with Clang, or Windows with MSYS2
  • Java 7 or up
  • Protobuf 3.0.0-beta-3 or up

Compiling and testing the codegen

Change to the compiler directory:

$ cd $GRPC_JAVA_ROOT/compiler

To compile the plugin:

$ ../gradlew java_pluginExecutable

To test the plugin with the compiler:

$ ../gradlew test

You will see a PASS if the test succeeds.

To compile a proto file and generate Java interfaces out of the service definitions:

$ protoc --plugin=protoc-gen-grpc-java=build/exe/java_plugin/protoc-gen-grpc-java \
  --grpc-java_out="$OUTPUT_FILE" --proto_path="$DIR_OF_PROTO_FILE" "$PROTO_FILE"

To generate Java interfaces with protobuf lite:

$ protoc --plugin=protoc-gen-grpc-java=build/exe/java_plugin/protoc-gen-grpc-java \
  --grpc-java_out=lite:"$OUTPUT_FILE" --proto_path="$DIR_OF_PROTO_FILE" "$PROTO_FILE"

To generate Java interfaces with protobuf nano:

$ protoc --plugin=protoc-gen-grpc-java=build/exe/java_plugin/protoc-gen-grpc-java \
  --grpc-java_out=nano:"$OUTPUT_FILE" --proto_path="$DIR_OF_PROTO_FILE" "$PROTO_FILE"

Installing the codegen to Maven local repository

This will compile a codegen and put it under your ~/.m2/repository. This will make it available to any build tool that pulls codegens from Maven repostiories.

$ ../gradlew install

Creating a release of GRPC Java

Please follow the instructions in RELEASING.md under the root directory for details on how to create a new release.