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Posted to commits@cassandra.apache.org by al...@apache.org on 2009/03/27 17:17:32 UTC
svn commit: r759194 -
/incubator/cassandra/trunk/src/org/apache/cassandra/net/MultiAsyncResult.java
Author: alakshman
Date: Fri Mar 27 16:17:32 2009
New Revision: 759194
URL: http://svn.apache.org/viewvc?rev=759194&view=rev
Log:
Part of the multiget() operation.
Added:
incubator/cassandra/trunk/src/org/apache/cassandra/net/MultiAsyncResult.java
Added: incubator/cassandra/trunk/src/org/apache/cassandra/net/MultiAsyncResult.java
URL: http://svn.apache.org/viewvc/incubator/cassandra/trunk/src/org/apache/cassandra/net/MultiAsyncResult.java?rev=759194&view=auto
==============================================================================
--- incubator/cassandra/trunk/src/org/apache/cassandra/net/MultiAsyncResult.java (added)
+++ incubator/cassandra/trunk/src/org/apache/cassandra/net/MultiAsyncResult.java Fri Mar 27 16:17:32 2009
@@ -0,0 +1,133 @@
+/**
+ * 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.util.ArrayList;
+import java.util.List;
+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.apache.cassandra.utils.LogUtil;
+import org.apache.log4j.Logger;
+
+public class MultiAsyncResult implements IAsyncResult
+{
+ private static Logger logger_ = Logger.getLogger( AsyncResult.class );
+ private int expectedResults_;
+ private List<Object[]> result_ = new ArrayList<Object[]>();
+ private AtomicBoolean done_ = new AtomicBoolean(false);
+ private Lock lock_ = new ReentrantLock();
+ private Condition condition_;
+
+ MultiAsyncResult(int expectedResults)
+ {
+ expectedResults_ = expectedResults;
+ condition_ = lock_.newCondition();
+ }
+
+ public Object[] get()
+ {
+ throw new UnsupportedOperationException("This operation is not supported in the AsyncResult abstraction.");
+ }
+
+ public Object[] get(long timeout, TimeUnit tu) throws TimeoutException
+ {
+ throw new UnsupportedOperationException("This operation is not supported in the AsyncResult abstraction.");
+ }
+
+ public List<Object[]> multiget()
+ {
+ lock_.lock();
+ try
+ {
+ if ( !done_.get() )
+ {
+ condition_.await();
+ }
+ }
+ catch ( InterruptedException ex )
+ {
+ logger_.warn( LogUtil.throwableToString(ex) );
+ }
+ finally
+ {
+ lock_.unlock();
+ }
+ return result_;
+ }
+
+ public boolean isDone()
+ {
+ return done_.get();
+ }
+
+ public List<Object[]> multiget(long timeout, TimeUnit tu) throws TimeoutException
+ {
+ lock_.lock();
+ try
+ {
+ boolean bVal = true;
+ try
+ {
+ if ( !done_.get() )
+ {
+ bVal = condition_.await(timeout, tu);
+ }
+ }
+ catch ( InterruptedException ex )
+ {
+ logger_.warn( LogUtil.throwableToString(ex) );
+ }
+
+ if ( !bVal && !done_.get() )
+ {
+ throw new TimeoutException("Operation timed out.");
+ }
+ }
+ finally
+ {
+ lock_.unlock();
+ }
+ return result_;
+ }
+
+ public void result(Message result)
+ {
+ try
+ {
+ lock_.lock();
+ if ( !done_.get() )
+ {
+ result_.add(result.getMessageBody());
+ if ( result_.size() == expectedResults_ )
+ {
+ done_.set(true);
+ condition_.signal();
+ }
+ }
+ }
+ finally
+ {
+ lock_.unlock();
+ }
+ }
+}