001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.ipc;
019
020import java.io.IOException;
021import java.net.InetAddress;
022import org.apache.hadoop.hbase.CellScanner;
023import org.apache.hadoop.hbase.io.ByteBuffAllocator;
024import org.apache.hadoop.hbase.ipc.RpcServer.CallCleanup;
025import org.apache.yetus.audience.InterfaceAudience;
026
027import org.apache.hbase.thirdparty.com.google.protobuf.BlockingService;
028import org.apache.hbase.thirdparty.com.google.protobuf.Descriptors.MethodDescriptor;
029import org.apache.hbase.thirdparty.com.google.protobuf.Message;
030
031import org.apache.hadoop.hbase.shaded.protobuf.generated.RPCProtos.RequestHeader;
032
033/**
034 * Datastructure that holds all necessary to a method invocation and then afterward, carries the
035 * result.
036 */
037@InterfaceAudience.Private
038class SimpleServerCall extends ServerCall<SimpleServerRpcConnection> {
039
040  final SimpleRpcServerResponder responder;
041
042  @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "NP_NULL_ON_SOME_PATH",
043      justification = "Can't figure why this complaint is happening... see below")
044  SimpleServerCall(int id, final BlockingService service, final MethodDescriptor md,
045    RequestHeader header, Message param, CellScanner cellScanner,
046    SimpleServerRpcConnection connection, long size, final InetAddress remoteAddress,
047    long receiveTime, int timeout, ByteBuffAllocator bbAllocator, CellBlockBuilder cellBlockBuilder,
048    CallCleanup reqCleanup, SimpleRpcServerResponder responder) {
049    super(id, service, md, header, param, cellScanner, connection, size, remoteAddress, receiveTime,
050      timeout, bbAllocator, cellBlockBuilder, reqCleanup);
051    this.responder = responder;
052  }
053
054  /**
055   * Call is done. Execution happened and we returned results to client. It is now safe to cleanup.
056   */
057  @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "IS2_INCONSISTENT_SYNC",
058      justification = "Presume the lock on processing request held by caller is protection enough")
059  @Override
060  public void done() {
061    super.done();
062    this.getConnection().decRpcCount(); // Say that we're done with this call.
063  }
064
065  @Override
066  public synchronized void sendResponseIfReady() throws IOException {
067    // set param null to reduce memory pressure
068    this.param = null;
069    this.responder.doRespond(getConnection(), this);
070  }
071
072  SimpleServerRpcConnection getConnection() {
073    return this.connection;
074  }
075}