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Apache HttpComponents Client
/*
* ====================================================================
* 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
* This class is not synchronized.
*
* @see org.apache.http.conn.ClientConnectionManager#closeIdleConnections
*
* @since 4.0
*
* @deprecated (4.1) no longer used
*/
@Deprecated
public class IdleConnectionHandler {
private final Log log = LogFactory.getLog(getClass());
/** Holds connections and the time they were added. */
private final Map connectionToTimes;
public IdleConnectionHandler() {
super();
connectionToTimes = new HashMap();
}
/**
* Registers the given connection with this handler. The connection will be held until
* {@link #remove} or {@link #closeIdleConnections} is called.
*
* @param connection the connection to add
*
* @see #remove
*/
public void add(final HttpConnection connection, final long validDuration, final TimeUnit unit) {
final long timeAdded = System.currentTimeMillis();
if (log.isDebugEnabled()) {
log.debug("Adding connection at: " + timeAdded);
}
connectionToTimes.put(connection, new TimeValues(timeAdded, validDuration, unit));
}
/**
* Removes the given connection from the list of connections to be closed when idle.
* This will return true if the connection is still valid, and false
* if the connection should be considered expired and not used.
*
* @param connection
* @return True if the connection is still valid.
*/
public boolean remove(final HttpConnection connection) {
final TimeValues times = connectionToTimes.remove(connection);
if(times == null) {
log.warn("Removing a connection that never existed!");
return true;
} else {
return System.currentTimeMillis() <= times.timeExpires;
}
}
/**
* Removes all connections referenced by this handler.
*/
public void removeAll() {
this.connectionToTimes.clear();
}
/**
* Closes connections that have been idle for at least the given amount of time.
*
* @param idleTime the minimum idle time, in milliseconds, for connections to be closed
*/
public void closeIdleConnections(final long idleTime) {
// the latest time for which connections will be closed
final long idleTimeout = System.currentTimeMillis() - idleTime;
if (log.isDebugEnabled()) {
log.debug("Checking for connections, idle timeout: " + idleTimeout);
}
for (final Entry entry : connectionToTimes.entrySet()) {
final HttpConnection conn = entry.getKey();
final TimeValues times = entry.getValue();
final long connectionTime = times.timeAdded;
if (connectionTime <= idleTimeout) {
if (log.isDebugEnabled()) {
log.debug("Closing idle connection, connection time: " + connectionTime);
}
try {
conn.close();
} catch (final IOException ex) {
log.debug("I/O error closing connection", ex);
}
}
}
}
public void closeExpiredConnections() {
final long now = System.currentTimeMillis();
if (log.isDebugEnabled()) {
log.debug("Checking for expired connections, now: " + now);
}
for (final Entry entry : connectionToTimes.entrySet()) {
final HttpConnection conn = entry.getKey();
final TimeValues times = entry.getValue();
if(times.timeExpires <= now) {
if (log.isDebugEnabled()) {
log.debug("Closing connection, expired @: " + times.timeExpires);
}
try {
conn.close();
} catch (final IOException ex) {
log.debug("I/O error closing connection", ex);
}
}
}
}
private static class TimeValues {
private final long timeAdded;
private final long timeExpires;
/**
* @param now The current time in milliseconds
* @param validDuration The duration this connection is valid for
* @param validUnit The unit of time the duration is specified in.
*/
TimeValues(final long now, final long validDuration, final TimeUnit validUnit) {
this.timeAdded = now;
if(validDuration > 0) {
this.timeExpires = now + validUnit.toMillis(validDuration);
} else {
this.timeExpires = Long.MAX_VALUE;
}
}
}
}