/*
* 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.catalina.ha.session;
import java.beans.PropertyChangeListener;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.regex.Pattern;
import org.apache.catalina.Container;
import org.apache.catalina.Lifecycle;
import org.apache.catalina.Loader;
import org.apache.catalina.ha.ClusterManager;
import org.apache.catalina.session.ManagerBase;
import org.apache.catalina.tribes.io.ReplicationStream;
/**
*
* @author Filip Hanik
* @version $Id: ClusterManagerBase.java 1175196 2011-09-24 16:39:29Z rjung $
*/
public abstract class ClusterManagerBase extends ManagerBase implements Lifecycle, PropertyChangeListener, ClusterManager{
/**
* The pattern used for including session attributes to
* replication, e.g. <code>^(userName|sessionHistory)$</code>.
* If not set, all session attributes will be eligible for replication.
*/
private String sessionAttributeFilter = null;
/**
* The compiled pattern used for including session attributes to
* replication, e.g. <code>^(userName|sessionHistory)$</code>.
* If not set, all session attributes will be eligible for replication.
*/
private Pattern sessionAttributePattern = null;
/**
* Return the string pattern used for including session attributes
* to replication.
*
* @return the sessionAttributeFilter
*/
public String getSessionAttributeFilter() {
return sessionAttributeFilter;
}
/**
* Set the pattern used for including session attributes to replication.
* If not set, all session attributes will be eligible for replication.
* <p>
* E.g. <code>^(userName|sessionHistory)$</code>
* </p>
*
* @param sessionAttributeFilter
* the filter name pattern to set
*/
public void setSessionAttributeFilter(String sessionAttributeFilter) {
if (sessionAttributeFilter == null
|| sessionAttributeFilter.trim().equals("")) {
this.sessionAttributeFilter = null;
sessionAttributePattern = null;
} else {
this.sessionAttributeFilter = sessionAttributeFilter;
sessionAttributePattern = Pattern.compile(sessionAttributeFilter);
}
}
/**
* Check whether the given session attribute should be distributed
*
* @return true if the attribute should be distributed
*/
public boolean willAttributeDistribute(String name) {
if (sessionAttributePattern == null) {
return true;
}
return sessionAttributePattern.matcher(name).matches();
}
public static ClassLoader[] getClassLoaders(Container container) {
Loader loader = null;
ClassLoader classLoader = null;
if (container != null) loader = container.getLoader();
if (loader != null) classLoader = loader.getClassLoader();
else classLoader = Thread.currentThread().getContextClassLoader();
if ( classLoader == Thread.currentThread().getContextClassLoader() ) {
return new ClassLoader[] {classLoader};
} else {
return new ClassLoader[] {classLoader,Thread.currentThread().getContextClassLoader()};
}
}
public ClassLoader[] getClassLoaders() {
return getClassLoaders(container);
}
/**
* Open Stream and use correct ClassLoader (Container) Switch
* ThreadClassLoader
*
* @param data
* @return The object input stream
* @throws IOException
*/
public ReplicationStream getReplicationStream(byte[] data) throws IOException {
return getReplicationStream(data,0,data.length);
}
public ReplicationStream getReplicationStream(byte[] data, int offset, int length) throws IOException {
ByteArrayInputStream fis = new ByteArrayInputStream(data, offset, length);
return new ReplicationStream(fis, getClassLoaders());
}
}