mirror of https://github.com/apache/cassandra
108 lines
3.5 KiB
Java
108 lines
3.5 KiB
Java
/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.cassandra.service;
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import java.util.List;
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import java.util.ArrayList;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.TimeoutException;
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import java.io.IOException;
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import org.apache.cassandra.config.DatabaseDescriptor;
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import org.apache.cassandra.net.IAsyncCallback;
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import org.apache.cassandra.net.Message;
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import org.apache.cassandra.net.MessagingService;
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import org.apache.cassandra.utils.SimpleCondition;
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import org.apache.log4j.Logger;
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public class WriteResponseHandler implements IAsyncCallback
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{
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protected static final Logger logger = Logger.getLogger( WriteResponseHandler.class );
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protected final SimpleCondition condition = new SimpleCondition();
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private final int responseCount;
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protected final List<Message> responses;
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protected int localResponses;
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private final long startTime;
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public WriteResponseHandler(int responseCount, String table)
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{
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// at most one node per range can bootstrap at a time, and these will be added to the write until
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// bootstrap finishes (at which point we no longer need to write to the old ones).
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assert 1 <= responseCount && responseCount <= 2 * DatabaseDescriptor.getReplicationFactor(table)
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: "invalid response count " + responseCount;
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this.responseCount = responseCount;
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responses = new ArrayList<Message>(responseCount);
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startTime = System.currentTimeMillis();
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}
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public void get() throws TimeoutException
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{
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try
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{
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long timeout = System.currentTimeMillis() - startTime + DatabaseDescriptor.getRpcTimeout();
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boolean success;
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try
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{
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success = condition.await(timeout, TimeUnit.MILLISECONDS);
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}
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catch (InterruptedException ex)
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{
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throw new AssertionError(ex);
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}
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if (!success)
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{
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throw new TimeoutException("Operation timed out - received only " + responses.size() + localResponses + " responses");
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}
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}
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finally
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{
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for (Message response : responses)
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{
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MessagingService.removeRegisteredCallback(response.getMessageId());
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}
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}
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}
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public synchronized void response(Message message)
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{
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if (condition.isSignaled())
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return;
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responses.add(message);
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maybeSignal();
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}
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public synchronized void localResponse()
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{
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if (condition.isSignaled())
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return;
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localResponses++;
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maybeSignal();
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}
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private void maybeSignal()
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{
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if (responses.size() + localResponses >= responseCount)
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{
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condition.signal();
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}
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}
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} |