| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.cassandra.service; |
| |
| import java.util.concurrent.atomic.AtomicIntegerFieldUpdater; |
| import java.util.function.Supplier; |
| |
| import org.apache.cassandra.db.Mutation; |
| import org.apache.cassandra.locator.ReplicaPlan; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.cassandra.net.Message; |
| import org.apache.cassandra.db.WriteType; |
| |
| /** |
| * Handles blocking writes for ONE, ANY, TWO, THREE, QUORUM, and ALL consistency levels. |
| */ |
| public class WriteResponseHandler<T> extends AbstractWriteResponseHandler<T> |
| { |
| protected static final Logger logger = LoggerFactory.getLogger(WriteResponseHandler.class); |
| |
| protected volatile int responses; |
| private static final AtomicIntegerFieldUpdater<WriteResponseHandler> responsesUpdater |
| = AtomicIntegerFieldUpdater.newUpdater(WriteResponseHandler.class, "responses"); |
| |
| public WriteResponseHandler(ReplicaPlan.ForWrite replicaPlan, |
| Runnable callback, |
| WriteType writeType, |
| Supplier<Mutation> hintOnFailure, |
| long queryStartNanoTime) |
| { |
| super(replicaPlan, callback, writeType, hintOnFailure, queryStartNanoTime); |
| responses = blockFor(); |
| } |
| |
| public WriteResponseHandler(ReplicaPlan.ForWrite replicaPlan, WriteType writeType, Supplier<Mutation> hintOnFailure, long queryStartNanoTime) |
| { |
| this(replicaPlan, null, writeType, hintOnFailure, queryStartNanoTime); |
| } |
| |
| public void onResponse(Message<T> m) |
| { |
| if (responsesUpdater.decrementAndGet(this) == 0) |
| signal(); |
| //Must be last after all subclass processing |
| //The two current subclasses both assume logResponseToIdealCLDelegate is called |
| //here. |
| logResponseToIdealCLDelegate(m); |
| } |
| |
| protected int ackCount() |
| { |
| return blockFor() - responses; |
| } |
| } |