import org.apache.hadoop.ipc.RpcClientUtil; //导入依赖的package包/类
@Test
public void testNamenodeProtocol() throws IOException {
  NamenodeProtocol np =
      NameNodeProxies.createNonHAProxy(conf,
          nnAddress, NamenodeProtocol.class, UserGroupInformation.getCurrentUser(),
          true).getProxy();

  boolean exists = RpcClientUtil.isMethodSupported(np,
      NamenodeProtocolPB.class, RPC.RpcKind.RPC_PROTOCOL_BUFFER,
      RPC.getProtocolVersion(NamenodeProtocolPB.class), "rollEditLog");

  assertTrue(exists);
  exists = RpcClientUtil.isMethodSupported(np,
      NamenodeProtocolPB.class, RPC.RpcKind.RPC_PROTOCOL_BUFFER,
      RPC.getProtocolVersion(NamenodeProtocolPB.class), "bogusMethod");
  assertFalse(exists);
}
 

import org.apache.hadoop.ipc.RpcClientUtil; //导入依赖的package包/类
@Override
public boolean isMethodSupported(String methodName) throws IOException {
  return RpcClientUtil
      .isMethodSupported(rpcProxy, RefreshUserMappingsProtocolPB.class,
          RPC.RpcKind.RPC_PROTOCOL_BUFFER,
          RPC.getProtocolVersion(RefreshUserMappingsProtocolPB.class),
          methodName);
}
 

import org.apache.hadoop.ipc.RpcClientUtil; //导入依赖的package包/类
@Override
public boolean isMethodSupported(String methodName) throws IOException {
  return RpcClientUtil.isMethodSupported(rpcProxy,
      RefreshAuthorizationPolicyProtocolPB.class,
      RPC.RpcKind.RPC_PROTOCOL_BUFFER,
      RPC.getProtocolVersion(RefreshAuthorizationPolicyProtocolPB.class),
      methodName);
}
 

import org.apache.hadoop.ipc.RpcClientUtil; //导入依赖的package包/类
@Override
public boolean isMethodSupported(String methodName) throws IOException {
  return RpcClientUtil.isMethodSupported(rpcProxy,
      RefreshCallQueueProtocolPB.class,
      RPC.RpcKind.RPC_PROTOCOL_BUFFER,
      RPC.getProtocolVersion(RefreshCallQueueProtocolPB.class),
      methodName);
}
 

import org.apache.hadoop.ipc.RpcClientUtil; //导入依赖的package包/类
@Override
public boolean isMethodSupported(String methodName) throws IOException {
  return RpcClientUtil.isMethodSupported(rpcProxy,
    GenericRefreshProtocolPB.class,
    RPC.RpcKind.RPC_PROTOCOL_BUFFER,
    RPC.getProtocolVersion(GenericRefreshProtocolPB.class),
    methodName);
}
 

import org.apache.hadoop.ipc.RpcClientUtil; //导入依赖的package包/类
@Override // ProtocolMetaInterface
public boolean isMethodSupported(String methodName)
    throws IOException {
  return RpcClientUtil.isMethodSupported(rpcProxy, DatanodeProtocolPB.class,
      RPC.RpcKind.RPC_PROTOCOL_BUFFER,
      RPC.getProtocolVersion(DatanodeProtocolPB.class), methodName);
}
 

import org.apache.hadoop.ipc.RpcClientUtil; //导入依赖的package包/类
@Test
public void testClientNamenodeProtocol() throws IOException {
  ClientProtocol cp =
      NameNodeProxies.createNonHAProxy(
          conf, nnAddress, ClientProtocol.class,
          UserGroupInformation.getCurrentUser(), true).getProxy();
  RpcClientUtil.isMethodSupported(cp,
      ClientNamenodeProtocolPB.class, RPC.RpcKind.RPC_PROTOCOL_BUFFER,
      RPC.getProtocolVersion(ClientNamenodeProtocolPB.class), "mkdirs");
}
 

import org.apache.hadoop.ipc.RpcClientUtil; //导入依赖的package包/类
@Override
public boolean isMethodSupported(String methodName) throws IOException {
  return RpcClientUtil.isMethodSupported(rpcProxy,
      ReconfigurationProtocolPB.class,
      RPC.RpcKind.RPC_PROTOCOL_BUFFER,
      RPC.getProtocolVersion(ReconfigurationProtocolPB.class),
      methodName);
}
 

import org.apache.hadoop.ipc.RpcClientUtil; //导入依赖的package包/类
@Override
public boolean isMethodSupported(String methodName) throws IOException {
  return RpcClientUtil
      .isMethodSupported(rpcProxy, InterDatanodeProtocolPB.class,
          RPC.RpcKind.RPC_PROTOCOL_BUFFER,
          RPC.getProtocolVersion(InterDatanodeProtocolPB.class), methodName);
}