SessionExpirationCacheListener.java example

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/*
 * 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.geode.modules.session.internal.common;

import org.apache.geode.cache.Declarable;
import org.apache.geode.cache.EntryEvent;
import org.apache.geode.cache.Operation;
import org.apache.geode.cache.util.CacheListenerAdapter;

import java.util.Properties;
import javax.servlet.http.HttpSession;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class SessionExpirationCacheListener extends CacheListenerAdapter<String, HttpSession>
    implements Declarable {

  private static final Logger LOG =
      LoggerFactory.getLogger(SessionExpirationCacheListener.class.getName());

  @Override
  public void afterDestroy(EntryEvent<String, HttpSession> event) {
    /**
     * A Session expired. If it was destroyed by GemFire expiration, process it. If it was destroyed
     * via Session.invalidate, ignore it since it has already been processed.
     */
    if (event.getOperation() == Operation.EXPIRE_DESTROY) {
      HttpSession session = (HttpSession) event.getOldValue();
      session.invalidate();
    }
  }

  @Override
  public void init(Properties p) {}
}