org.redisson.tomcat.UpdateValve Maven / Gradle / Ivy
/**
* Copyright (c) 2013-2024 Nikita Koksharov
*
* Licensed 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.redisson.tomcat;
import java.io.IOException;
import java.util.concurrent.atomic.AtomicInteger;
import javax.servlet.ServletException;
import org.apache.catalina.Manager;
import org.apache.catalina.connector.Request;
import org.apache.catalina.connector.Response;
import org.apache.catalina.valves.ValveBase;
/**
* Redisson Valve object for Apache Tomcat
*
* @author Nikita Koksharov
*
*/
public class UpdateValve extends ValveBase {
private static final String ALREADY_FILTERED_NOTE = UpdateValve.class.getName() + ".ALREADY_FILTERED_NOTE";
private final AtomicInteger usage = new AtomicInteger(1);
public UpdateValve() {
super(true);
}
public void incUsage() {
usage.incrementAndGet();
}
public int decUsage() {
return usage.decrementAndGet();
}
@Override
public void invoke(Request request, Response response) throws IOException, ServletException {
if (getNext() == null) {
return;
}
//check if we already filtered/processed this request
if (request.getNote(ALREADY_FILTERED_NOTE) == null) {
request.setNote(ALREADY_FILTERED_NOTE, Boolean.TRUE);
try {
getNext().invoke(request, response);
} finally {
request.removeNote(ALREADY_FILTERED_NOTE);
if (request.getContext() == null) {
return;
}
final ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
try {
ClassLoader applicationClassLoader = request.getContext().getLoader().getClassLoader();
Thread.currentThread().setContextClassLoader(applicationClassLoader);
Manager manager = request.getContext().getManager();
((RedissonSessionManager)manager).store(request.getSession(false));
} finally {
Thread.currentThread().setContextClassLoader(classLoader);
}
}
} else {
getNext().invoke(request, response);
}
}
}