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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;

/**
 *
 * 

* Implements {@link javax.servlet.http.HttpSession} from the javax.servlet package. *

* */ @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 _attributes=new HashMap(); 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 _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 getAttributeNames() { synchronized (this) { checkValid(); List names=_attributes==null?Collections.EMPTY_LIST:new ArrayList(_attributes.keySet()); return Collections.enumeration(names); } } /* ------------------------------------------------------------ */ public Set getNames() { synchronized (this) { return new HashSet(_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 keys; synchronized(this) { keys=new ArrayList(_attributes.keySet()); } Iterator 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 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 iter = _attributes.values().iterator(); iter.hasNext();) { Object value = iter.next(); if (value instanceof HttpSessionActivationListener) { HttpSessionActivationListener listener = (HttpSessionActivationListener) value; listener.sessionDidActivate(event); } } } } }