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Diffstat (limited to 'src/org/apache/http/impl/conn/tsccm/ThreadSafeClientConnManager.java')
| -rw-r--r-- | src/org/apache/http/impl/conn/tsccm/ThreadSafeClientConnManager.java | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/src/org/apache/http/impl/conn/tsccm/ThreadSafeClientConnManager.java b/src/org/apache/http/impl/conn/tsccm/ThreadSafeClientConnManager.java new file mode 100644 index 0000000..0781e05 --- /dev/null +++ b/src/org/apache/http/impl/conn/tsccm/ThreadSafeClientConnManager.java @@ -0,0 +1,282 @@ +/* + * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/impl/conn/tsccm/ThreadSafeClientConnManager.java $ + * $Revision: 673450 $ + * $Date: 2008-07-02 10:35:05 -0700 (Wed, 02 Jul 2008) $ + * + * ==================================================================== + * + * 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. + * ==================================================================== + * + * This software consists of voluntary contributions made by many + * individuals on behalf of the Apache Software Foundation. For more + * information on the Apache Software Foundation, please see + * <http://www.apache.org/>. + * + */ + +package org.apache.http.impl.conn.tsccm; + +import java.io.IOException; +import java.util.concurrent.TimeUnit; + +import org.apache.commons.logging.Log; +import org.apache.commons.logging.LogFactory; +import org.apache.http.conn.routing.HttpRoute; +import org.apache.http.conn.scheme.SchemeRegistry; +import org.apache.http.conn.ClientConnectionManager; +import org.apache.http.conn.ClientConnectionOperator; +import org.apache.http.conn.ClientConnectionRequest; +import org.apache.http.conn.ConnectionPoolTimeoutException; +import org.apache.http.conn.ManagedClientConnection; +import org.apache.http.conn.OperatedClientConnection; +import org.apache.http.params.HttpParams; +import org.apache.http.impl.conn.DefaultClientConnectionOperator; + + + +/** + * Manages a pool of {@link OperatedClientConnection client connections}. + * <p> + * This class is derived from <code>MultiThreadedHttpConnectionManager</code> + * in HttpClient 3. See there for original authors. + * </p> + * + * @author <a href="mailto:rolandw at apache.org">Roland Weber</a> + * @author <a href="mailto:becke@u.washington.edu">Michael Becke</a> + * + * + * <!-- empty lines to avoid svn diff problems --> + * @version $Revision: 673450 $ $Date: 2008-07-02 10:35:05 -0700 (Wed, 02 Jul 2008) $ + * + * @since 4.0 + */ +public class ThreadSafeClientConnManager implements ClientConnectionManager { + + private final Log log = LogFactory.getLog(getClass()); + + /** The schemes supported by this connection manager. */ + protected SchemeRegistry schemeRegistry; + + /** The pool of connections being managed. */ + protected final AbstractConnPool connectionPool; + + /** The operator for opening and updating connections. */ + protected ClientConnectionOperator connOperator; + + + + /** + * Creates a new thread safe connection manager. + * + * @param params the parameters for this manager + * @param schreg the scheme registry, or + * <code>null</code> for the default registry + */ + public ThreadSafeClientConnManager(HttpParams params, + SchemeRegistry schreg) { + + if (params == null) { + throw new IllegalArgumentException("HTTP parameters may not be null"); + } + this.schemeRegistry = schreg; + this.connOperator = createConnectionOperator(schreg); + this.connectionPool = createConnectionPool(params); + + } // <constructor> + + + @Override + protected void finalize() throws Throwable { + shutdown(); + super.finalize(); + } + + + /** + * Hook for creating the connection pool. + * + * @return the connection pool to use + */ + protected AbstractConnPool createConnectionPool(final HttpParams params) { + + AbstractConnPool acp = new ConnPoolByRoute(connOperator, params); + boolean conngc = true; //@@@ check parameters to decide + if (conngc) { + acp.enableConnectionGC(); + } + return acp; + } + + + /** + * Hook for creating the connection operator. + * It is called by the constructor. + * Derived classes can override this method to change the + * instantiation of the operator. + * The default implementation here instantiates + * {@link DefaultClientConnectionOperator DefaultClientConnectionOperator}. + * + * @param schreg the scheme registry to use, or <code>null</code> + * + * @return the connection operator to use + */ + protected ClientConnectionOperator + createConnectionOperator(SchemeRegistry schreg) { + + return new DefaultClientConnectionOperator(schreg); + } + + + // non-javadoc, see interface ClientConnectionManager + public SchemeRegistry getSchemeRegistry() { + return this.schemeRegistry; + } + + + public ClientConnectionRequest requestConnection( + final HttpRoute route, + final Object state) { + + final PoolEntryRequest poolRequest = connectionPool.requestPoolEntry( + route, state); + + return new ClientConnectionRequest() { + + public void abortRequest() { + poolRequest.abortRequest(); + } + + public ManagedClientConnection getConnection( + long timeout, TimeUnit tunit) throws InterruptedException, + ConnectionPoolTimeoutException { + if (route == null) { + throw new IllegalArgumentException("Route may not be null."); + } + + if (log.isDebugEnabled()) { + log.debug("ThreadSafeClientConnManager.getConnection: " + + route + ", timeout = " + timeout); + } + + BasicPoolEntry entry = poolRequest.getPoolEntry(timeout, tunit); + return new BasicPooledConnAdapter(ThreadSafeClientConnManager.this, entry); + } + + }; + + } + + + // non-javadoc, see interface ClientConnectionManager + public void releaseConnection(ManagedClientConnection conn, long validDuration, TimeUnit timeUnit) { + + if (!(conn instanceof BasicPooledConnAdapter)) { + throw new IllegalArgumentException + ("Connection class mismatch, " + + "connection not obtained from this manager."); + } + BasicPooledConnAdapter hca = (BasicPooledConnAdapter) conn; + if ((hca.getPoolEntry() != null) && (hca.getManager() != this)) { + throw new IllegalArgumentException + ("Connection not obtained from this manager."); + } + + try { + // make sure that the response has been read completely + if (hca.isOpen() && !hca.isMarkedReusable()) { + if (log.isDebugEnabled()) { + log.debug + ("Released connection open but not marked reusable."); + } + // In MTHCM, there would be a call to + // SimpleHttpConnectionManager.finishLastResponse(conn); + // Consuming the response is handled outside in 4.0. + + // make sure this connection will not be re-used + // Shut down rather than close, we might have gotten here + // because of a shutdown trigger. + // Shutdown of the adapter also clears the tracked route. + hca.shutdown(); + } + } catch (IOException iox) { + //@@@ log as warning? let pass? + if (log.isDebugEnabled()) + log.debug("Exception shutting down released connection.", + iox); + } finally { + BasicPoolEntry entry = (BasicPoolEntry) hca.getPoolEntry(); + boolean reusable = hca.isMarkedReusable(); + hca.detach(); + if (entry != null) { + connectionPool.freeEntry(entry, reusable, validDuration, timeUnit); + } + } + } + + + // non-javadoc, see interface ClientConnectionManager + public void shutdown() { + connectionPool.shutdown(); + } + + + /** + * Gets the total number of pooled connections for the given route. + * This is the total number of connections that have been created and + * are still in use by this connection manager for the route. + * This value will not exceed the maximum number of connections per host. + * + * @param route the route in question + * + * @return the total number of pooled connections for that route + */ + public int getConnectionsInPool(HttpRoute route) { + return ((ConnPoolByRoute)connectionPool).getConnectionsInPool( + route); + } + + + /** + * Gets the total number of pooled connections. This is the total number of + * connections that have been created and are still in use by this connection + * manager. This value will not exceed the maximum number of connections + * in total. + * + * @return the total number of pooled connections + */ + public int getConnectionsInPool() { + synchronized (connectionPool) { + return connectionPool.numConnections; //@@@ + } + } + + + // non-javadoc, see interface ClientConnectionManager + public void closeIdleConnections(long idleTimeout, TimeUnit tunit) { + // combine these two in a single call? + connectionPool.closeIdleConnections(idleTimeout, tunit); + connectionPool.deleteClosedConnections(); + } + + public void closeExpiredConnections() { + connectionPool.closeExpiredConnections(); + connectionPool.deleteClosedConnections(); + } + + +} // class ThreadSafeClientConnManager + |