/**
* 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.net;
import java.net.InetAddress;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
class AsyncResult implements IAsyncResult
{
private static Logger logger = LoggerFactory.getLogger(AsyncResult.class);
private byte[] result;
private AtomicBoolean done = new AtomicBoolean(false);
private Lock lock = new ReentrantLock();
private Condition condition;
private long startTime;
private InetAddress from;
public AsyncResult()
{
condition = lock.newCondition();
startTime = System.currentTimeMillis();
}
public byte[] get(long timeout, TimeUnit tu) throws TimeoutException
{
lock.lock();
try
{
boolean bVal = true;
try
{
if (!done.get())
{
timeout = TimeUnit.MILLISECONDS.convert(timeout, tu);
long overall_timeout = timeout - (System.currentTimeMillis() - startTime);
bVal = overall_timeout > 0 && condition.await(overall_timeout, TimeUnit.MILLISECONDS);
}
}
catch (InterruptedException ex)
{
throw new AssertionError(ex);
}
if (!bVal && !done.get())
{
throw new TimeoutException("Operation timed out.");
}
}
finally
{
lock.unlock();
}
return result;
}
public void result(Message response)
{
try
{
lock.lock();
if (!done.get())
{
from = response.getFrom();
result = response.getMessageBody();
done.set(true);
condition.signal();
}
}
finally
{
lock.unlock();
}
}
public boolean isLatencyForSnitch()
{
return false;
}
public InetAddress getFrom()
{
return from;
}
}