mirror of https://github.com/grpc/grpc-java.git
59 lines
1.8 KiB
Markdown
59 lines
1.8 KiB
Markdown
gRPC Java Codegen Plugin for Protobuf Compiler
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==============================================
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This generates the Java interfaces out of the service definition from a
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`.proto` file. It works with the Protobuf Compiler (``protoc``).
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Normally you don't need to compile the codegen by yourself, since pre-compiled
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binaries for common platforms are available on Maven Central:
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1. Navigate to https://mvnrepository.com/artifact/io.grpc/protoc-gen-grpc-java
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2. Click into a version
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3. Click "Files"
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However, if the pre-compiled binaries are not compatible with your system,
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you may want to build your own codegen.
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## Compiling and testing the codegen
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Set up your system as described in [COMPILING.md](../COMPILING.md).
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Then change to the `compiler` directory:
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```
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$ cd $GRPC_JAVA_ROOT/compiler
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```
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To compile the plugin:
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```
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$ ../gradlew java_pluginExecutable
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```
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To test the plugin with the compiler:
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```
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$ ../gradlew test
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```
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You will see a `PASS` if the test succeeds.
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To compile a proto file and generate Java interfaces out of the service definitions:
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```
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$ protoc --plugin=protoc-gen-grpc-java=build/exe/java_plugin/protoc-gen-grpc-java \
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--grpc-java_out="$OUTPUT_FILE" --proto_path="$DIR_OF_PROTO_FILE" "$PROTO_FILE"
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```
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To generate Java interfaces with protobuf lite:
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```
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$ protoc --plugin=protoc-gen-grpc-java=build/exe/java_plugin/protoc-gen-grpc-java \
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--grpc-java_out=lite:"$OUTPUT_FILE" --proto_path="$DIR_OF_PROTO_FILE" "$PROTO_FILE"
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```
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## Installing the codegen to Maven local repository
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This will compile a codegen and put it under your ``~/.m2/repository``. This
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will make it available to any build tool that pulls codegens from Maven
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repositories.
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```
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$ ../gradlew publishToMavenLocal
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```
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## Creating a release of gRPC Java
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Please follow the instructions in ``RELEASING.md`` under the root directory for
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details on how to create a new release.
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