gRPC & Android

什么是 RPC

这个是知乎上的一个关于 rpc 的问题
谁能用通俗的语言解释一下什么是 RPC 框架？

gRPC的官方Demo
http://www.grpc.io/docs/quickstart/android.html#update-a-grpc-service
git clone -b v1.0.0 https://github.com/grpc/grpc-javacd grpc-java/examples./gradlew installDist./build/install/examples/bin/hello-world-server./build/install/examples/bin/hello-world-client

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按照APK 方式随意
目录:examples/android/helloworld
./gradlew assembleDebug
https://developers.google.com/protocol-buffers/docs/proto3
基于protobuf 3.x，基于Netty 4.x +
Netty是一个高性能、异步事件驱动的NIO框架，它提供了对TCP、UDP和文件传输的支持，作为一个异步NIO框架，Netty的所有IO操作都是异步非阻塞的，通过Future-Listener机制，用户可以方便的主动获取或者通过通知机制获得IO操作结果。
Java NIO(New IO)是一个可以替代标准 Java IO API 的 IO API（从 Java 1.4 开始)，Java NIO 提供了与标准 IO 不同的 IO 工作方式。
http://www.ibm.com/developerworks/cn/education/java/j-nio/j-nio.html
http://ifeve.com/netty-in-action-7/
Android dependencies
https://github.com/grpc/grpc-java
compile 'io.grpc:grpc-okhttp:1.0.3'compile 'io.grpc:grpc-protobuf-lite:1.0.3'compile 'io.grpc:grpc-stub:1.0.3'
http://square.github.io/retrofit/
https://github.com/google/protobuf/tree/master/javanano
-----------------------------------------------------------划重点---------------------------------------------------------------
1.生成代码
下载release包
https://github.com/google/protobuf/releases/download/v3.1.0/protoc-3.1.0-osx-x86_64.zip
可能需要提前创建好文件夹,如果你不打算写shell脚本的话.
解压上面下载的文件进入bin执行脚本
./protoc --proto_path=src --javanano_out=build/gen src/helloworld.proto
helloword.proto 文件内容
syntax = "proto3";
option java_multiple_files = true;

option java_package = "io.grpc.examples.helloworld";

option ignore_services = true

package helloworld;

message ProductGpid {

    ProductSource source = 1;

}

message ProductGpidResp {

    int64 gpid = 1;

}

enum ProductSource {

    ProductSourceInvalid = 0;

    ProductSourceEzbuy = 10;

    ProductSourceTaobao = 20;

}

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2.增加依赖
compile 'com.squareup.retrofit2:retrofit:2.1.0'compile 'com.squareup.retrofit2:converter-protobuf:2.1.0'compile 'com.google.protobuf.nano:protobuf-javanano:3.1.0'
ArrayList<Protocol> protocolArrayList = new ArrayList<>();protocolArrayList.add(Protocol.HTTP_1_1);protocolArrayList.add(Protocol.HTTP_2);OkHttpClient okHttpClient = new OkHttpClient.Builder().protocols(protocolArrayList).build();Retrofit retrofit = new Retrofit.Builder().client(okHttpClient).addConverterFactory(ProtoConverterFactory.create()).baseUrl("http://192.168.199.64:14151").build();SimpleService service = retrofit.create(SimpleService.class);ProductGpid productGpid = new ProductGpid();productGpid.source = Product.ProductSourceEzbuy;Call<ProductGpidResp> call = service.Gpid(productGpid);call.enqueue(new Callback<ProductGpidResp>() {@Override public void onResponse(Call<ProductGpidResp> call, Response<ProductGpidResp> response) {Log.e("asd", response.body().toString()); }@Override public void onFailure(Call<ProductGpidResp> call, Throwable t) {Log.e("asd", "onFailure"); }});
public interface SimpleService {@POST("/")Call<ProductGpidResp> Gpid(@Body ProductGpid impl);}
https://github.com/google/protobuf-gradle-plugin/blob/master/testProjectAndroid/build.gradle#L92