NFS server support added to filesystem server, includes mount and portmapper services plus an NFS v3 server.

Not enabled or wired in yet.

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@4742 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/filesys/server/oncrpc/RpcRequestQueue.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2005 Alfresco, Inc.
+ *
+ * Licensed under the Mozilla Public License version 1.1 
+ * with a permitted attribution clause. You may obtain a
+ * copy of the License at
+ *
+ *   http://www.alfresco.org/legal/license.txt
+ *
+ * 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.alfresco.filesys.server.oncrpc;
+
+import java.util.*;
+
+/**
+ * RPC Request Queue Class
+ * 
+ * <p>Provides a request queue for a thread pool of worker threads.
+ * 
+ * @author GKSpencer
+ */
+public class RpcRequestQueue {
+
+	//	List of RPC requests
+	
+	private LinkedList m_queue;
+	
+	/**
+	 * Class constructor
+	 */
+	public RpcRequestQueue()
+	{
+		m_queue = new LinkedList();
+	}
+
+	/**
+	 * Return the number of requests in the queue
+	 * 
+	 * @return int
+	 */
+	public final synchronized int numberOfRequests()
+	{
+		return m_queue.size();
+	}
+
+	/**
+	 * Add a request to the queue
+	 * 
+	 * @param req RpcPacket
+	 */
+	public final synchronized void addRequest(RpcPacket req)
+	{
+
+		//	Add the request to the queue
+
+		m_queue.add(req);
+
+		//	Notify workers that there is a request to process
+
+		notifyAll();
+	}
+
+	/**
+	 * Remove a request from the head of the queue
+	 * 
+	 * @return RpcPacket
+	 * @exception InterruptedException
+	 */
+	public final synchronized RpcPacket removeRequest()
+		throws InterruptedException
+	{
+
+		//	Wait until there is a request
+
+		waitWhileEmpty();
+
+		//	Get the request from the head of the queue
+
+		return (RpcPacket) m_queue.removeFirst();
+	}
+
+	/**
+	 * Wait for a request to be added to the queue
+	 * 
+	 * @exception InterruptedException
+	 */
+	public final synchronized void waitWhileEmpty()
+		throws InterruptedException
+	{
+
+		//	Wait until some work arrives on the queue
+
+		while (m_queue.size() == 0)
+			wait();
+	}
+
+	/**
+	 * Wait for the request queue to be emptied
+	 * 
+	 * @exception InterruptedException
+	 */
+	public final synchronized void waitUntilEmpty()
+		throws InterruptedException
+	{
+
+		//	Wait until the request queue is empty
+
+		while (m_queue.size() != 0)
+			wait();
+	}
+}