package org.eclipse.jetty.server.session;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSessionActivationListener;
import javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionBindingListener;
import javax.servlet.http.HttpSessionContext;
import javax.servlet.http.HttpSessionEvent;
import org.eclipse.jetty.util.log.Logger;
/**
*
* <p>
* Implements {@link javax.servlet.http.HttpSession} from the <code>javax.servlet</code> package.
* </p>
*
*/
@SuppressWarnings("deprecation")
public abstract class AbstractSession implements AbstractSessionManager.SessionIf
{
final static Logger LOG = SessionHandler.LOG;
private final AbstractSessionManager _manager;
private final String _clusterId; // ID unique within cluster
private final String _nodeId; // ID unique within node
private final Map<String,Object> _attributes=new HashMap<String, Object>();
private boolean _idChanged;
private final long _created;
private long _cookieSet;
private long _accessed; // the time of the last access
private long _lastAccessed; // the time of the last access excluding this one
private boolean _invalid;
private boolean _doInvalidate;
private long _maxIdleMs;
private boolean _newSession;
private int _requests;
// TODO remove this.
protected final Map<String,Object> _jdbcAttributes=_attributes;
/* ------------------------------------------------------------- */
protected AbstractSession(AbstractSessionManager abstractSessionManager, HttpServletRequest request)
{
_manager = abstractSessionManager;
_newSession=true;
_created=System.currentTimeMillis();
_clusterId=_manager._sessionIdManager.newSessionId(request,_created);
_nodeId=_manager._sessionIdManager.getNodeId(_clusterId,request);
_accessed=_created;
_lastAccessed=_created;
_requests=1;
_maxIdleMs=_manager._dftMaxIdleSecs>0?_manager._dftMaxIdleSecs*1000L:-1;
if (LOG.isDebugEnabled())
LOG.debug("new session & id "+_nodeId+" "+_clusterId);
}
/* ------------------------------------------------------------- */
protected AbstractSession(AbstractSessionManager abstractSessionManager, long created, long accessed, String clusterId)
{
_manager = abstractSessionManager;
_created=created;
_clusterId=clusterId;
_nodeId=_manager._sessionIdManager.getNodeId(_clusterId,null);
_accessed=accessed;
_lastAccessed=accessed;
_requests=1;
if (LOG.isDebugEnabled())
LOG.debug("new session "+_nodeId+" "+_clusterId);
}
/* ------------------------------------------------------------- */
/**
* asserts that the session is valid
*/
protected void checkValid() throws IllegalStateException
{
if (_invalid)
throw new IllegalStateException();
}
/* ------------------------------------------------------------- */
public AbstractSession getSession()
{
return this;
}
/* ------------------------------------------------------------- */
public long getAccessed()
{
synchronized (this)
{
return _accessed;
}
}
/* ------------------------------------------------------------ */
public Object getAttribute(String name)
{
synchronized (this)
{
checkValid();
return _attributes.get(name);
}
}
/* ------------------------------------------------------------ */
public int getAttributes()
{
synchronized (this)
{
checkValid();
return _attributes.size();
}
}
/* ------------------------------------------------------------ */
@SuppressWarnings({ "unchecked" })
public Enumeration<String> getAttributeNames()
{
synchronized (this)
{
checkValid();
List<String> names=_attributes==null?Collections.EMPTY_LIST:new ArrayList<String>(_attributes.keySet());
return Collections.enumeration(names);
}
}
/* ------------------------------------------------------------ */
public Set<String> getNames()
{
synchronized (this)
{
return new HashSet<String>(_attributes.keySet());
}
}
/* ------------------------------------------------------------- */
public long getCookieSetTime()
{
return _cookieSet;
}
/* ------------------------------------------------------------- */
public long getCreationTime() throws IllegalStateException
{
return _created;
}
/* ------------------------------------------------------------ */
public String getId() throws IllegalStateException
{
return _manager._nodeIdInSessionId?_nodeId:_clusterId;
}
/* ------------------------------------------------------------- */
public String getNodeId()
{
return _nodeId;
}
/* ------------------------------------------------------------- */
public String getClusterId()
{
return _clusterId;
}
/* ------------------------------------------------------------- */
public long getLastAccessedTime() throws IllegalStateException
{
checkValid();
return _lastAccessed;
}
/* ------------------------------------------------------------- */
public int getMaxInactiveInterval()
{
checkValid();
return (int)(_maxIdleMs/1000);
}
/* ------------------------------------------------------------ */
/*
* @see javax.servlet.http.HttpSession#getServletContext()
*/
public ServletContext getServletContext()
{
return _manager._context;
}
/* ------------------------------------------------------------- */
@Deprecated
public HttpSessionContext getSessionContext() throws IllegalStateException
{
checkValid();
return AbstractSessionManager.__nullSessionContext;
}
/* ------------------------------------------------------------- */
/**
* @deprecated As of Version 2.2, this method is replaced by
* {@link #getAttribute}
*/
@Deprecated
public Object getValue(String name) throws IllegalStateException
{
return getAttribute(name);
}
/* ------------------------------------------------------------- */
/**
* @deprecated As of Version 2.2, this method is replaced by
* {@link #getAttributeNames}
*/
@Deprecated
public String[] getValueNames() throws IllegalStateException
{
synchronized(this)
{
checkValid();
if (_attributes==null)
return new String[0];
String[] a=new String[_attributes.size()];
return (String[])_attributes.keySet().toArray(a);
}
}
/* ------------------------------------------------------------ */
protected boolean access(long time)
{
synchronized(this)
{
if (_invalid)
return false;
_newSession=false;
_lastAccessed=_accessed;
_accessed=time;
if (_maxIdleMs>0 && _lastAccessed>0 && _lastAccessed + _maxIdleMs < time)
{
invalidate();
return false;
}
_requests++;
return true;
}
}
/* ------------------------------------------------------------ */
protected void complete()
{
synchronized(this)
{
_requests--;
if (_doInvalidate && _requests<=0 )
doInvalidate();
}
}
/* ------------------------------------------------------------- */
protected void timeout() throws IllegalStateException
{
// remove session from context and invalidate other sessions with same ID.
_manager.removeSession(this,true);
// Notify listeners and unbind values
synchronized (this)
{
if (!_invalid)
{
if (_requests<=0)
doInvalidate();
else
_doInvalidate=true;
}
}
}
/* ------------------------------------------------------------- */
public void invalidate() throws IllegalStateException
{
// remove session from context and invalidate other sessions with same ID.
_manager.removeSession(this,true);
doInvalidate();
}
/* ------------------------------------------------------------- */
protected void doInvalidate() throws IllegalStateException
{
try
{
LOG.debug("invalidate {}",_clusterId);
if (isValid())
clearAttributes();
}
finally
{
synchronized (this)
{
// mark as invalid
_invalid=true;
}
}
}
/* ------------------------------------------------------------- */
public void clearAttributes()
{
while (_attributes!=null && _attributes.size()>0)
{
ArrayList<String> keys;
synchronized(this)
{
keys=new ArrayList<String>(_attributes.keySet());
}
Iterator<String> iter=keys.iterator();
while (iter.hasNext())
{
String key=(String)iter.next();
Object value;
synchronized(this)
{
value=doPutOrRemove(key,null);
}
unbindValue(key,value);
_manager.doSessionAttributeListeners(this,key,value,null);
}
}
if (_attributes!=null)
_attributes.clear();
}
/* ------------------------------------------------------------- */
public boolean isIdChanged()
{
return _idChanged;
}
/* ------------------------------------------------------------- */
public boolean isNew() throws IllegalStateException
{
checkValid();
return _newSession;
}
/* ------------------------------------------------------------- */
/**
* @deprecated As of Version 2.2, this method is replaced by
* {@link #setAttribute}
*/
@Deprecated
public void putValue(java.lang.String name, java.lang.Object value) throws IllegalStateException
{
setAttribute(name,value);
}
/* ------------------------------------------------------------ */
public void removeAttribute(String name)
{
setAttribute(name,null);
}
/* ------------------------------------------------------------- */
/**
* @deprecated As of Version 2.2, this method is replaced by
* {@link #removeAttribute}
*/
@Deprecated
public void removeValue(java.lang.String name) throws IllegalStateException
{
removeAttribute(name);
}
/* ------------------------------------------------------------ */
protected Object doPutOrRemove(String name, Object value)
{
return value==null?_attributes.remove(name):_attributes.put(name,value);
}
/* ------------------------------------------------------------ */
protected Object doGet(String name)
{
return _attributes.get(name);
}
/* ------------------------------------------------------------ */
public void setAttribute(String name, Object value)
{
Object old=null;
synchronized (this)
{
checkValid();
old=doPutOrRemove(name,value);
}
if (value==null || !value.equals(old))
{
if (old!=null)
unbindValue(name,old);
if (value!=null)
bindValue(name,value);
_manager.doSessionAttributeListeners(this,name,old,value);
}
}
/* ------------------------------------------------------------- */
public void setIdChanged(boolean changed)
{
_idChanged=changed;
}
/* ------------------------------------------------------------- */
public void setMaxInactiveInterval(int secs)
{
_maxIdleMs=(long)secs*1000L;
}
/* ------------------------------------------------------------- */
@Override
public String toString()
{
return this.getClass().getName()+":"+getId()+"@"+hashCode();
}
/* ------------------------------------------------------------- */
/** If value implements HttpSessionBindingListener, call valueBound() */
public void bindValue(java.lang.String name, Object value)
{
if (value!=null&&value instanceof HttpSessionBindingListener)
((HttpSessionBindingListener)value).valueBound(new HttpSessionBindingEvent(this,name));
}
/* ------------------------------------------------------------ */
public boolean isValid()
{
return !_invalid;
}
/* ------------------------------------------------------------- */
protected void cookieSet()
{
synchronized (this)
{
_cookieSet=_accessed;
}
}
/* ------------------------------------------------------------ */
public int getRequests()
{
synchronized (this)
{
return _requests;
}
}
/* ------------------------------------------------------------ */
public void setRequests(int requests)
{
synchronized (this)
{
_requests=requests;
}
}
/* ------------------------------------------------------------- */
/** If value implements HttpSessionBindingListener, call valueUnbound() */
public void unbindValue(java.lang.String name, Object value)
{
if (value!=null&&value instanceof HttpSessionBindingListener)
((HttpSessionBindingListener)value).valueUnbound(new HttpSessionBindingEvent(this,name));
}
/* ------------------------------------------------------------- */
public void willPassivate()
{
synchronized(this)
{
HttpSessionEvent event = new HttpSessionEvent(this);
for (Iterator<Object> iter = _attributes.values().iterator(); iter.hasNext();)
{
Object value = iter.next();
if (value instanceof HttpSessionActivationListener)
{
HttpSessionActivationListener listener = (HttpSessionActivationListener) value;
listener.sessionWillPassivate(event);
}
}
}
}
/* ------------------------------------------------------------- */
public void didActivate()
{
synchronized(this)
{
HttpSessionEvent event = new HttpSessionEvent(this);
for (Iterator<Object> iter = _attributes.values().iterator(); iter.hasNext();)
{
Object value = iter.next();
if (value instanceof HttpSessionActivationListener)
{
HttpSessionActivationListener listener = (HttpSessionActivationListener) value;
listener.sessionDidActivate(event);
}
}
}
}
}