1 files changed, 227 insertions, 0 deletions
diff --git a/qpid/java/common/src/main/java/org/apache/mina/common/support/DefaultIoFuture.java b/qpid/java/common/src/main/java/org/apache/mina/common/support/DefaultIoFuture.java
new file mode 100644
index 0000000000..4fd28c4eb5
--- /dev/null
+++ b/qpid/java/common/src/main/java/org/apache/mina/common/support/DefaultIoFuture.java
@@ -0,0 +1,227 @@
+/*
+ *  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.mina.common.support;
+
+import org.apache.mina.common.IoFuture;
+import org.apache.mina.common.IoSession;
+import org.apache.mina.common.IoFutureListener;
+
+import java.util.List;
+import java.util.ArrayList;
+import java.util.Iterator;
+
+/**
+ * A default implementation of {@link org.apache.mina.common.IoFuture}.
+ *
+ * @author The Apache Directory Project (mina-dev@directory.apache.org)
+ */
+public class DefaultIoFuture implements IoFuture
+{
+    private final IoSession session;
+    private final Object lock;
+    private List listeners;
+    private Object result;
+    private boolean ready;
+
+
+    /**
+     * Creates a new instance.
+     *
+     * @param session an {@link IoSession} which is associated with this future
+     */
+    public DefaultIoFuture( IoSession session )
+    {
+        this.session = session;
+        this.lock = this;
+    }
+
+    /**
+     * Creates a new instance which uses the specified object as a lock.
+     */
+    public DefaultIoFuture( IoSession session, Object lock )
+    {
+        if( lock == null )
+        {
+            throw new NullPointerException( "lock" );
+        }
+        this.session = session;
+        this.lock = lock;
+    }
+
+    public IoSession getSession()
+    {
+        return session;
+    }
+
+    public Object getLock()
+    {
+        return lock;
+    }
+
+    public void join()
+    {
+        synchronized( lock )
+        {
+            while( !ready )
+            {
+                try
+                {
+                    lock.wait();
+                }
+                catch( InterruptedException e )
+                {
+                }
+            }
+        }
+    }
+
+    public boolean join( long timeoutInMillis )
+    {
+        long startTime = ( timeoutInMillis <= 0 ) ? 0 : System
+                .currentTimeMillis();
+        long waitTime = timeoutInMillis;
+
+        synchronized( lock )
+        {
+            if( ready )
+            {
+                return ready;
+            }
+            else if( waitTime <= 0 )
+            {
+                return ready;
+            }
+
+            for( ;; )
+            {
+                try
+                {
+                    lock.wait( waitTime );
+                }
+                catch( InterruptedException e )
+                {
+                }
+
+                if( ready )
+                    return true;
+                else
+                {
+                    waitTime = timeoutInMillis - ( System.currentTimeMillis() - startTime );
+                    if( waitTime <= 0 )
+                    {
+                        return ready;
+                    }
+                }
+            }
+        }
+    }
+
+    public boolean isReady()
+    {
+        synchronized( lock )
+        {
+            return ready;
+        }
+    }
+
+    /**
+     * Sets the result of the asynchronous operation, and mark it as finished.
+     */
+    protected void setValue( Object newValue )
+    {
+        synchronized( lock )
+        {
+            // Allow only once.
+            if( ready )
+            {
+                return;
+            }
+
+            result = newValue;
+            ready = true;
+            lock.notifyAll();
+
+            notifyListeners();
+        }
+    }
+
+    /**
+     * Returns the result of the asynchronous operation.
+     */
+    protected Object getValue()
+    {
+        synchronized( lock )
+        {
+            return result;
+        }
+    }
+
+    public void addListener( IoFutureListener listener )
+    {
+        if( listener == null )
+        {
+            throw new NullPointerException( "listener" );
+        }
+
+        synchronized( lock )
+        {
+            if(listeners == null)
+            {
+                 listeners = new ArrayList();
+            }
+            listeners.add( listener );
+            if( ready )
+            {
+                listener.operationComplete( this );
+            }
+        }
+    }
+
+    public void removeListener( IoFutureListener listener )
+    {
+        if( listener == null )
+        {
+            throw new NullPointerException( "listener" );
+        }
+
+        synchronized( lock )
+        {
+            listeners.remove( listener );
+        }
+    }
+
+    private void notifyListeners()
+    {
+        synchronized( lock )
+        {
+
+            if(listeners != null)
+            {
+
+                for( Iterator i = listeners.iterator(); i.hasNext(); ) {
+                    ( ( IoFutureListener ) i.next() ).operationComplete( this );
+                }
+            }
+        }
+    }
+}
+
+
+