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* Licensed to the Apache Software Foundation (ASF) under one *
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* 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.james.nntpserver;
import org.apache.avalon.cornerstone.services.connection.ConnectionHandler;
import org.apache.avalon.excalibur.pool.DefaultPool;
import org.apache.avalon.excalibur.pool.HardResourceLimitingPool;
import org.apache.avalon.excalibur.pool.ObjectFactory;
import org.apache.avalon.excalibur.pool.Pool;
import org.apache.avalon.excalibur.pool.Poolable;
import org.apache.avalon.framework.activity.Initializable;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.avalon.framework.logger.LogEnabled;
import org.apache.avalon.framework.service.ServiceException;
import org.apache.avalon.framework.service.ServiceManager;
import org.apache.james.core.AbstractJamesService;
import org.apache.james.nntpserver.repository.NNTPRepository;
import org.apache.james.services.UsersRepository;
import org.apache.james.util.watchdog.Watchdog;
import org.apache.james.util.watchdog.WatchdogFactory;
/**
* NNTP Server
*
*/
public class NNTPServer extends AbstractJamesService implements NNTPServerMBean {
/**
* Whether authentication is required to access this NNTP server
*/
private boolean authRequired = false;
/**
* The repository that stores the news articles for this NNTP server.
*/
private NNTPRepository repo;
/**
* The repository that stores the local users. Used for authentication.
*/
private UsersRepository userRepository = null;
/**
* The pool used to provide NNTP Handler objects
*/
private Pool theHandlerPool = null;
/**
* The pool used to provide NNTP Handler objects
*/
private ObjectFactory theHandlerFactory = new NNTPHandlerFactory();
/**
* The factory used to generate Watchdog objects
*/
private WatchdogFactory theWatchdogFactory;
/**
* The configuration data to be passed to the handler
*/
private NNTPHandlerConfigurationData theConfigData
= new NNTPHandlerConfigurationDataImpl();
/**
* @see org.apache.avalon.framework.service.Serviceable#service(ServiceManager)
*/
public void service( final ServiceManager componentManager )
throws ServiceException {
super.service(componentManager);
userRepository = (UsersRepository)componentManager.lookup(UsersRepository.ROLE);
repo = (NNTPRepository)componentManager
.lookup("org.apache.james.nntpserver.repository.NNTPRepository");
}
/**
* @see org.apache.avalon.framework.configuration.Configurable#configure(Configuration)
*/
public void configure(final Configuration configuration) throws ConfigurationException {
super.configure(configuration);
if (isEnabled()) {
Configuration handlerConfiguration = configuration.getChild("handler");
authRequired =
handlerConfiguration.getChild("authRequired").getValueAsBoolean(false);
if (getLogger().isDebugEnabled()) {
if (authRequired) {
getLogger().debug("NNTP Server requires authentication.");
} else {
getLogger().debug("NNTP Server doesn't require authentication.");
}
}
}
}
/**
* @see org.apache.avalon.framework.activity.Initializable#initialize()
*/
public void initialize() throws Exception {
super.initialize();
if (!isEnabled()) {
return;
}
if (connectionLimit != null) {
theHandlerPool = new HardResourceLimitingPool(theHandlerFactory, 5, connectionLimit.intValue());
getLogger().debug("Using a bounded pool for NNTP handlers with upper limit " + connectionLimit.intValue());
} else {
// NOTE: The maximum here is not a real maximum. The handler pool will continue to
// provide handlers beyond this value.
theHandlerPool = new DefaultPool(theHandlerFactory, null, 5, 30);
getLogger().debug("Using an unbounded pool for NNTP handlers.");
}
if (theHandlerPool instanceof LogEnabled) {
((LogEnabled)theHandlerPool).enableLogging(getLogger());
}
if (theHandlerPool instanceof Initializable) {
((Initializable)theHandlerPool).initialize();
}
theWatchdogFactory = getWatchdogFactory();
}
/**
* @see org.apache.james.core.AbstractJamesService#getDefaultPort()
*/
protected int getDefaultPort() {
return 119;
}
/**
* @see org.apache.james.core.AbstractJamesService#getServiceType()
*/
public String getServiceType() {
return "NNTP Service";
}
/**
* @see org.apache.avalon.cornerstone.services.connection.AbstractHandlerFactory#newHandler()
*/
protected ConnectionHandler newHandler()
throws Exception {
NNTPHandler theHandler = (NNTPHandler)theHandlerPool.get();
Watchdog theWatchdog = theWatchdogFactory.getWatchdog(theHandler.getWatchdogTarget());
theHandler.setConfigurationData(theConfigData);
theHandler.setWatchdog(theWatchdog);
return theHandler;
}
/**
* @see org.apache.avalon.cornerstone.services.connection.ConnectionHandlerFactory#releaseConnectionHandler(ConnectionHandler)
*/
public void releaseConnectionHandler( ConnectionHandler connectionHandler ) {
if (!(connectionHandler instanceof NNTPHandler)) {
throw new IllegalArgumentException("Attempted to return non-NNTPHandler to pool.");
}
theHandlerPool.put((Poolable)connectionHandler);
}
/**
* The factory for producing handlers.
*/
private static class NNTPHandlerFactory
implements ObjectFactory {
/**
* @see org.apache.avalon.excalibur.pool.ObjectFactory#newInstance()
*/
public Object newInstance() throws Exception {
return new NNTPHandler();
}
/**
* @see org.apache.avalon.excalibur.pool.ObjectFactory#getCreatedClass()
*/
public Class getCreatedClass() {
return NNTPHandler.class;
}
/**
* @see org.apache.avalon.excalibur.pool.ObjectFactory#decommision(Object)
*/
public void decommission( Object object ) throws Exception {
return;
}
}
/**
* A class to provide NNTP handler configuration to the handlers
*/
private class NNTPHandlerConfigurationDataImpl
implements NNTPHandlerConfigurationData {
/**
* @see org.apache.james.smtpserver.NNTPHandlerConfigurationData#getHelloName()
*/
public String getHelloName() {
return NNTPServer.this.helloName;
}
/**
* @see org.apache.james.smtpserver.NNTPHandlerConfigurationData#isAuthRequired()
*/
public boolean isAuthRequired() {
return NNTPServer.this.authRequired;
}
/**
* @see org.apache.james.smtpserver.NNTPHandlerConfigurationData#getUsersRepository()
*/
public UsersRepository getUsersRepository() {
return NNTPServer.this.userRepository;
}
/**
* @see org.apache.james.smtpserver.NNTPHandlerConfigurationData#getNNTPRepository()
*/
public NNTPRepository getNNTPRepository() {
return NNTPServer.this.repo;
}
}
}
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