/*
 * 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.catalina;

import javax.servlet.http.HttpSession;

import org.apache.catalina.Session;

import org.apache.geode.cache.EntryNotFoundException;
import org.apache.geode.cache.Region;
import org.apache.geode.modules.session.catalina.internal.DeltaSessionStatistics;
import org.apache.geode.modules.util.RegionConfiguration;
import org.apache.geode.modules.util.SessionCustomExpiry;

public abstract class AbstractSessionCache implements SessionCache {

  protected SessionManager sessionManager;

  /**
   * The sessionRegion is the <code>Region</code> that actually stores and replicates the
   * <code>Session</code>s.
   */
  Region<String, HttpSession> sessionRegion;

  /**
   * The operatingRegion is the <code>Region</code> used to do HTTP operations. if local cache is
   * enabled, then this will be the local <code>Region</code>; otherwise, it will be the session
   * <code>Region</code>.
   */
  Region<String, HttpSession> operatingRegion;

  protected DeltaSessionStatistics statistics;

  AbstractSessionCache(SessionManager sessionManager) {
    this.sessionManager = sessionManager;
  }

  @Override
  public String getOperatingRegionName() {
    return getOperatingRegion().getFullPath();
  }

  @Override
  public void putSession(Session session) {
    getOperatingRegion().put(session.getId(), (HttpSession) session);
  }

  @Override
  public HttpSession getSession(String sessionId) {
    return getOperatingRegion().get(sessionId);
  }

  @Override
  public void destroySession(String sessionId) {
    try {
      getOperatingRegion().destroy(sessionId);
    } catch (EntryNotFoundException enex) {
      // Ignored
    }
  }

  @Override
  public DeltaSessionStatistics getStatistics() {
    return this.statistics;
  }

  protected SessionManager getSessionManager() {
    return this.sessionManager;
  }

  @Override
  public Region<String, HttpSession> getSessionRegion() {
    return this.sessionRegion;
  }

  @Override
  public Region<String, HttpSession> getOperatingRegion() {
    return this.operatingRegion;
  }

  void createStatistics() {
    this.statistics = new DeltaSessionStatistics(getCache().getDistributedSystem(),
        getSessionManager().getStatisticsName());
  }

  RegionConfiguration createRegionConfiguration() {
    RegionConfiguration configuration = getNewRegionConfiguration();
    configuration.setRegionName(getSessionManager().getRegionName());
    configuration.setRegionAttributesId(getSessionManager().getRegionAttributesId());
    if (getSessionManager()
        .getMaxInactiveInterval() != RegionConfiguration.DEFAULT_MAX_INACTIVE_INTERVAL) {
      configuration.setMaxInactiveInterval(getSessionManager().getMaxInactiveInterval());
      configuration.setCustomExpiry(new SessionCustomExpiry());
    }
    configuration
        .setEnableGatewayDeltaReplication(getSessionManager().getEnableGatewayDeltaReplication());
    configuration.setEnableGatewayReplication(getSessionManager().getEnableGatewayReplication());
    configuration.setEnableDebugListener(getSessionManager().getEnableDebugListener());
    return configuration;
  }

  // Helper methods added to improve unit testing of class
  RegionConfiguration getNewRegionConfiguration() {
    return new RegionConfiguration();
  }
}