import org.apache.hadoop.ipc.ClientId; //导入依赖的package包/类
@Test
public void testRpcClientId() {
  byte[] uuid = ClientId.getClientId();
  RpcRequestHeaderProto header = ProtoUtil.makeRpcRequestHeader(
      RpcKind.RPC_PROTOCOL_BUFFER, OperationProto.RPC_FINAL_PACKET, 0,
      RpcConstants.INVALID_RETRY_COUNT, uuid);
  assertTrue(Arrays.equals(uuid, header.getClientId().toByteArray()));
}
 

import org.apache.hadoop.ipc.ClientId; //导入依赖的package包/类
void readRpcIdsFromXml(Stanza st) {
  this.rpcClientId = st.hasChildren("RPC_CLIENTID") ? 
      ClientId.toBytes(st.getValue("RPC_CLIENTID"))
      : RpcConstants.DUMMY_CLIENT_ID;
  this.rpcCallId = st.hasChildren("RPC_CALLID") ? 
      Integer.parseInt(st.getValue("RPC_CALLID"))
      : RpcConstants.INVALID_CALL_ID;
}
 

import org.apache.hadoop.ipc.ClientId; //导入依赖的package包/类
private static void appendRpcIdsToString(final StringBuilder builder,
    final byte[] clientId, final int callId) {
  builder.append(", RpcClientId=");
  builder.append(ClientId.toString(clientId));
  builder.append(", RpcCallId=");
  builder.append(callId);
}
 

import org.apache.hadoop.ipc.ClientId; //导入依赖的package包/类
private static void appendRpcIdsToXml(ContentHandler contentHandler,
    final byte[] clientId, final int callId) throws SAXException {
  XMLUtils.addSaxString(contentHandler, "RPC_CLIENTID",
      ClientId.toString(clientId));
  XMLUtils.addSaxString(contentHandler, "RPC_CALLID", 
      Integer.toString(callId));
}
 

import org.apache.hadoop.ipc.ClientId; //导入依赖的package包/类
void readRpcIdsFromXml(Stanza st) {
  this.rpcClientId = st.hasChildren("RPC_CLIENTID") ? 
      ClientId.toBytes(st.getValue("RPC_CLIENTID"))
      : RpcConstants.DUMMY_CLIENT_ID;
  this.rpcCallId = st.hasChildren("RPC_CALLID") ? 
      Integer.valueOf(st.getValue("RPC_CALLID"))
      : RpcConstants.INVALID_CALL_ID;
}
 

import org.apache.hadoop.ipc.ClientId; //导入依赖的package包/类
private static void appendRpcIdsToXml(ContentHandler contentHandler,
    final byte[] clientId, final int callId) throws SAXException {
  XMLUtils.addSaxString(contentHandler, "RPC_CLIENTID",
      ClientId.toString(clientId));
  XMLUtils.addSaxString(contentHandler, "RPC_CALLID", 
      Integer.valueOf(callId).toString());
}
 

import org.apache.hadoop.ipc.ClientId; //导入依赖的package包/类
@Override
public TestProtos.EmptyResponseProto ping(
    RpcController unused, TestProtos.EmptyRequestProto request)
    throws ServiceException {
  // Ensure clientId is received
  byte[] clientId = Server.getClientId();
  Assert.assertNotNull(clientId);
  Assert.assertEquals(ClientId.BYTE_LENGTH, clientId.length);
  // test with ip set
  testSuccessLogFormat(true);
  testFailureLogFormat(true);
  return TestProtos.EmptyResponseProto.newBuilder().build();
}