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/* * To change this template, choose Tools | Templates * and open the template in the editor. */ package net.jot.web.server; import java.util.Date; import java.util.Enumeration; import java.util.Hashtable; import javax.servlet.ServletContext; import javax.servlet.http.HttpSession; import javax.servlet.http.HttpSessionBindingEvent; import javax.servlet.http.HttpSessionBindingListener; import javax.servlet.http.HttpSessionContext; /** * Represent a web session * @author thibautc */ public class JOTWebSession implements HttpSession { private String id; private long creationTime; private long lastAccessTime; /** 30 mn default*/ private int maxInactiveInterval=30*60; boolean invalidated=true; private Hashtable attributes=new Hashtable(); private boolean isNew=true; /** * use JOTWEbSession(uniqueId) instead */ private JOTWebSession(){} /** * Instead, retrieve a session using request.getSession() (JOTSessionManager) * @param id */ JOTWebSession(String uniqueId) { this.id=uniqueId; creationTime=new Date().getTime(); lastAccessTime=creationTime; invalidated=false; } /** * return creation time as long (ms since jan 1 1970) * @see HttpSession */ public long getCreationTime() { if(invalidated) throw new IllegalStateException("Session was invalidated."); return creationTime; } /** * return the session ID * @see HttpSession */ public String getId() { return id; } /** * return the last time the session was accessed * @see HttpSession */ public long getLastAccessedTime() { return lastAccessTime; } /** * @see HttpSession * @return */ public ServletContext getServletContext() { return JOTSessionManager.getInstance().getServletContext(); } /** * Set the session expiration time (in Seconds) of inactivity * @param intervalInSec * @see HttpSession */ public void setMaxInactiveInterval(int intervalInSec) { maxInactiveInterval=intervalInSec; } /** * Get the session expiration time (in Seconds) of inactivity * @param intervalInSec * @see HttpSession */ public int getMaxInactiveInterval() { return maxInactiveInterval; } /** * Unsafe and deprecated .. not implemented * @see HttpSession * @deprecated * @return */ public HttpSessionContext getSessionContext() { throw new UnsupportedOperationException("This is not supported - Deprecated anyhow."); } /** * return a session attribute * @see HttpSession * @param name * @return */ public Object getAttribute(String name) { if(invalidated) throw new IllegalStateException("Session was invalidated."); return attributes.get(name); } /** * @deprecated * @param name * @see HttpSession * @return */ public Object getValue(String name) { return getAttribute(name); } /** * @see HttpSession * @return */ public Enumeration getAttributeNames() { if(invalidated) throw new IllegalStateException("Session was invalidated."); return attributes.keys(); } /** * @see HttpSession * @return */ public String[] getValueNames() { if(invalidated) throw new IllegalStateException("Session was invalidated."); return (String[])attributes.keySet().toArray(new String[0]); } /** * @see HttpSession * @return */ public void setAttribute(String key, Object value) { if(invalidated) throw new IllegalStateException("Session was invalidated."); attributes.put(key, value); if(value instanceof HttpSessionBindingListener) { HttpSessionBindingEvent evt=new HttpSessionBindingEvent(this, key, value); ((HttpSessionBindingListener)value).valueBound(evt); } } /** * @see HttpSession * @return */ public void putValue(String key, Object value) { setAttribute(key, value); } /** * @see HttpSession * @return */ public void removeAttribute(String key) { if(invalidated) throw new IllegalStateException("Session was invalidated."); Object value=attributes.get(key); if(value!=null && value instanceof HttpSessionBindingListener) { HttpSessionBindingEvent evt=new HttpSessionBindingEvent(this, key, value); ((HttpSessionBindingListener)value).valueUnbound(evt); // helps GC value=null; } attributes.remove(key); } /** * @see HttpSession * @return */ public void removeValue(String key) { removeAttribute(key); } /** * @see HttpSession * @return */ public void invalidate() { if(invalidated) throw new IllegalStateException("Session was already invalidated."); Enumeration e=getAttributeNames(); while(e.hasMoreElements()) { removeAttribute((String)e.nextElement()); } //help GC attributes=null; invalidated=true; } /** * * @see HttpSession * When the server creates a session in response to the first request, * the session is in a new state. So, HttpSession.isNew() will return true. * On the next request, which must include the session ID received from the server (cookies or rewritten url) * the server will associate the request with the session. * The client will then have joined the session, meaning that the session is no longer * in the new state. So, HttpSession.isNew() will return false. * @return */ public boolean isNew() { if(invalidated) throw new IllegalStateException("Session was invalidated."); return isNew; } boolean isInvalidated() { return invalidated; } void setLastAccessTime(long time) { lastAccessTime=time; } void setNew(boolean value) { isNew=value; } public boolean isExpired() { long now=new Date().getTime()/1000; return getLastAccessedTime()/1000<now-getMaxInactiveInterval(); } }