An RPC framework based on Netty, ZooKeeper and Spring
中文详情：Chinese Details

• Simple code and framework
• Service registry/discovery support by ZooKeeper
• High availability, load balance and failover
• Support different load balance strategy
• Support asynchronous/synchronous call
• Support different versions of service
• Support different serializer/deserializer
• Dead TCP connection detecting with heartbeat

1. Define an interface:

   public interface HelloService { 
       String hello(String name); 
       String hello(Person person);
   }
   

2. Implement the interface with annotation @NettyRpcService:

   @NettyRpcService(HelloService.class, version = "1.0")
   public class HelloServiceImpl implements HelloService {
       public HelloServiceImpl(){}
   
       @Override
       public String hello(String name) {
           return "Hello " + name;
       }
   
       @Override
       public String hello(Person person) {
           return "Hello " + person.getFirstName() + " " + person.getLastName();
       }
   }
   

3. Run zookeeper

   For example: zookeeper is running on 127.0.0.1:2181

4. Start server:

   1. Start server with spring config: RpcServerBootstrap
   2. Start server without spring config: RpcServerBootstrap2

5. Call the service:

   1. Use the client:

   final RpcClient rpcClient = new RpcClient("127.0.0.1:2181");
   	
   // Sync call
   HelloService helloService = rpcClient.createService(HelloService.class, "1.0");
   String result = helloService.hello("World");
   	
   // Async call
   RpcService client = rpcClient.createAsyncService(HelloService.class, "2.0");
   RPCFuture helloFuture = client.call("hello", "World");
   String result = (String) helloFuture.get(3000, TimeUnit.MILLISECONDS);
   

   2. Use annotation @RpcAutowired:

   public class Baz implements Foo {
       @RpcAutowired(version = "1.0")
       private HelloService helloService1;
          
       @RpcAutowired(version = "2.0")
       private HelloService helloService2;
          
       @Override
       public String say(String s) {
           return helloService1.hello(s);
       }
   }