| /* |
| * 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.net.InetAddress; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.concurrent.atomic.AtomicIntegerFieldUpdater; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.cassandra.db.Keyspace; |
| import org.apache.cassandra.net.MessageIn; |
| import org.apache.cassandra.db.ConsistencyLevel; |
| 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(Collection<InetAddress> writeEndpoints, |
| Collection<InetAddress> pendingEndpoints, |
| ConsistencyLevel consistencyLevel, |
| Keyspace keyspace, |
| Runnable callback, |
| WriteType writeType) |
| { |
| super(keyspace, writeEndpoints, pendingEndpoints, consistencyLevel, callback, writeType); |
| responses = totalBlockFor(); |
| } |
| |
| public WriteResponseHandler(InetAddress endpoint, WriteType writeType, Runnable callback) |
| { |
| this(Arrays.asList(endpoint), Collections.<InetAddress>emptyList(), ConsistencyLevel.ONE, null, callback, writeType); |
| } |
| |
| public WriteResponseHandler(InetAddress endpoint, WriteType writeType) |
| { |
| this(endpoint, writeType, null); |
| } |
| |
| public void response(MessageIn<T> m) |
| { |
| if (responsesUpdater.decrementAndGet(this) == 0) |
| signal(); |
| } |
| |
| protected int ackCount() |
| { |
| return totalBlockFor() - responses; |
| } |
| |
| public boolean isLatencyForSnitch() |
| { |
| return false; |
| } |
| } |