001: /*
002: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
003: *
004: * This file is part of Resin(R) Open Source
005: *
006: * Each copy or derived work must preserve the copyright notice and this
007: * notice unmodified.
008: *
009: * Resin Open Source is free software; you can redistribute it and/or modify
010: * it under the terms of the GNU General Public License as published by
011: * the Free Software Foundation; either version 2 of the License, or
012: * (at your option) any later version.
013: *
014: * Resin Open Source is distributed in the hope that it will be useful,
015: * but WITHOUT ANY WARRANTY; without even the implied warranty of
016: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017: * of NON-INFRINGEMENT. See the GNU General Public License for more
018: * details.
019: *
020: * You should have received a copy of the GNU General Public License
021: * along with Resin Open Source; if not, write to the
022: *
023: * Free Software Foundation, Inc.
024: * 59 Temple Place, Suite 330
025: * Boston, MA 02111-1307 USA
026: *
027: * @author Scott Ferguson
028: */
029:
030: package com.caucho.webbeans.context;
031:
032: import com.caucho.server.dispatch.ServletInvocation;
033: import com.caucho.webbeans.component.*;
034:
035: import javax.servlet.*;
036: import javax.servlet.http.*;
037: import javax.webbeans.*;
038:
039: /**
040: * The session scope value
041: */
042: public class SessionScope extends ScopeContext {
043: public <T> T get(ComponentFactory<T> component, boolean create) {
044: ServletRequest request = ServletInvocation.getContextRequest();
045:
046: if (request != null) {
047: HttpSession session = ((HttpServletRequest) request)
048: .getSession();
049: ComponentImpl comp = (ComponentImpl) component;
050:
051: return (T) session.getAttribute(comp.getScopeId());
052: } else
053: return null;
054: }
055:
056: public <T> void put(ComponentFactory<T> component, T value) {
057: ServletRequest request = ServletInvocation.getContextRequest();
058:
059: if (request != null) {
060: HttpSession session = ((HttpServletRequest) request)
061: .getSession();
062: ComponentImpl comp = (ComponentImpl) component;
063:
064: session.setAttribute(comp.getScopeId(), value);
065: }
066: }
067:
068: public <T> void remove(ComponentFactory<T> component) {
069: ServletRequest request = ServletInvocation.getContextRequest();
070:
071: if (request != null) {
072: HttpSession session = ((HttpServletRequest) request)
073: .getSession();
074: ComponentImpl comp = (ComponentImpl) component;
075:
076: session.removeAttribute(comp.getScopeId());
077: }
078: }
079:
080: @Override
081: public boolean canInject(ScopeContext scope) {
082: return (scope instanceof SingletonScope
083: || scope instanceof ApplicationScope || scope instanceof SessionScope);
084: }
085:
086: public void addDestructor(ComponentImpl comp, Object value) {
087: ServletRequest request = ServletInvocation.getContextRequest();
088:
089: if (request != null) {
090: HttpSession session = ((HttpServletRequest) request)
091: .getSession();
092: DestructionListener listener = (DestructionListener) session
093: .getAttribute("caucho.destroy");
094:
095: if (listener == null) {
096: listener = new DestructionListener();
097: session.setAttribute("caucho.destroy", listener);
098: }
099:
100: listener.addValue(comp, value);
101: }
102: }
103: }
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