com.github.ibole.infrastructure.cache.session.redis.RedisHttpSession Maven / Gradle / Ivy

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package com.github.ibole.infrastructure.cache.session.redis;

import java.io.Serializable;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpSessionContext;

/*********************************************************************************************
 * .
 * 
 * 
 * Copyright 2016, iBole Inc. All rights reserved.
 * 
 * 

 * 
 *********************************************************************************************/


/**
 * 实现HttpSession接口，替换原生的Session存取操作.
 * 
 * @author bwang
 *
 */
public class RedisHttpSession implements HttpSession, Serializable {
  private static final long serialVersionUID = 1L;
  protected long creationTime = 0L;
  protected long lastAccessedTime = 0L;
  protected String id;
  protected int maxInactiveInterval;
  /**
   * Session过期标志.
   */
  protected transient boolean expired;
  /**
   * Session新建标志.
   */
  protected transient boolean isNew;
  /**
   * Session同步标志，用于标记本地进程中的缓存对象与远程Redis中是否一致.
   */
  protected transient boolean isDirty;
  private transient RedisSessionListener listener;
  // 本地Session缓存，需要注意同远程Redis的数据同步.
  private Map data;

  /**
   * Default constructor.
   */
  public RedisHttpSession() {
    this.expired = false;
    this.isNew = false;
    this.isDirty = false;
    this.data = new HashMap();
  }

  public void setListener(RedisSessionListener listener) {
    this.listener = listener;
  }

  public long getCreationTime() {
    return this.creationTime;
  }

  public String getId() {
    return this.id;
  }

  public long getLastAccessedTime() {
    return this.lastAccessedTime;
  }

  public void setLastAccessedTime(long lastAccessedTime) {
    this.lastAccessedTime = lastAccessedTime;
  }

  public ServletContext getServletContext() {
    return null;
  }

  public void setMaxInactiveInterval(int i) {
    this.maxInactiveInterval = i;
  }

  public int getMaxInactiveInterval() {
    return this.maxInactiveInterval;
  }

  public HttpSessionContext getSessionContext() {
    return null;
  }

  public Object getAttribute(String key) {
    return this.data.get(key);
  }

  public Object getValue(String key) {
    return this.data.get(key);
  }

  public String[] getValueNames() {
    String[] names = new String[this.data.size()];
    return ((String[]) this.data.keySet().toArray(names));
  }

  public void setAttribute(String s, Object o) {
    this.data.put(s, o);
    this.isDirty = true;
  }

  public void putValue(String s, Object o) {
    this.data.put(s, o);
    this.isDirty = true;
  }

  public void removeAttribute(String s) {
    this.data.remove(s);
    this.isDirty = true;
  }

  public void removeValue(String s) {
    this.data.remove(s);
    this.isDirty = true;
  }

  /**
   * invalidate session.
   */
  public void invalidate() {
    this.expired = true;
    this.isDirty = true;
    if (this.listener != null) {
      this.listener.onInvalidated(this);
    }
  }

  public boolean isNew() {
    return this.isNew;
  }


  public Enumeration getAttributeNames() {
    return new SessionEnumeration(this.data);
  }

}