| /* |
| * 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.axis2.transport.nhttp; |
| |
| import org.apache.http.nio.NHttpClientConnection; |
| import org.apache.http.protocol.HttpExecutionContext; |
| import org.apache.http.HttpHost; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import java.util.*; |
| import java.io.IOException; |
| |
| public class ConnectionPool { |
| |
| private static final Log log = LogFactory.getLog(ConnectionPool.class); |
| |
| /** A map of available connections for reuse. The key selects the host+port of the |
| * connection and the value contains a List of available connections to destination |
| */ |
| private static Map connMap = Collections.synchronizedMap(new HashMap()); |
| |
| public static NHttpClientConnection getConnection(String host, int port) { |
| |
| String key = host + ":" + Integer.toString(port); |
| List connections = (List) connMap.get(key); |
| |
| if (connections == null) { |
| log.debug("No connections available for reuse"); |
| return null; |
| |
| } else { |
| NHttpClientConnection conn = null; |
| |
| while (!connections.isEmpty()) { |
| conn = (NHttpClientConnection) connections.remove(0); |
| |
| if (conn.isOpen()) { |
| log.debug("A connection to host : " + host + " on port : " + |
| port + " is available in the pool, and will be reused"); |
| return conn; |
| } else { |
| log.debug("closing stale connection"); |
| try { |
| conn.close(); |
| } catch (IOException ignore) { |
| ignore.printStackTrace(); |
| } |
| } |
| } |
| return null; |
| } |
| } |
| |
| public static void release(NHttpClientConnection conn) { |
| |
| HttpHost host = (HttpHost) conn.getContext().getAttribute( |
| HttpExecutionContext.HTTP_TARGET_HOST); |
| String key = host.getHostName() + ":" + Integer.toString(host.getPort()); |
| |
| List connections = (List) connMap.get(key); |
| if (connections == null) { |
| connections = Collections.synchronizedList(new LinkedList()); |
| connMap.put(key, connections); |
| } |
| |
| connections.add(conn); |
| |
| log.debug("Released a connection to host: " + host.getHostName() + " on port : " + |
| host.getPort() + " to the connection pool of current size : " + connections.size()); |
| } |
| } |