Source Code Cross Referenced for RenderResponsePool.java in  » Portal » Open-Portal » com » sun » portal » portlet » impl » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Portal » Open Portal » com.sun.portal.portlet.impl 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 2002 Sun Microsystems, Inc. All 
003:         * rights reserved. Use of this product is subject 
004:         * to license terms. Federal Acquisitions: 
005:         * Commercial Software -- Government Users 
006:         * Subject to Standard License Terms and 
007:         * Conditions. 
008:         * 
009:         * Sun, Sun Microsystems, the Sun logo, and Sun ONE 
010:         * are trademarks or registered trademarks of Sun Microsystems, 
011:         * Inc. in the United States and other countries. 
012:         */
013:        package com.sun.portal.portlet.impl;
014:
015:        import java.io.StringWriter;
016:        import java.io.ByteArrayOutputStream;
017:
018:        import javax.servlet.http.HttpServletRequest;
019:        import javax.servlet.http.HttpServletResponse;
020:
021:        import javax.portlet.RenderRequest;
022:        import javax.portlet.RenderResponse;
023:
024:        import com.sun.portal.common.pool.ObjectPool;
025:        import com.sun.portal.common.pool.ObjectManager;
026:
027:        import java.util.logging.Logger;
028:        import java.util.logging.Level;
029:
030:        import com.sun.portal.portletcontainercommon.PortletContainerRenderRequest;
031:        import com.sun.portal.portletcontainercommon.PortletContainerRenderResponse;
032:
033:        import com.sun.portal.portletcontainercommon.descriptor.PortletDescriptor;
034:        import com.sun.portal.log.common.PortalLogger;
035:
036:        /**
037:         * This class maintains reusable portlet response objects in a pool.
038:         * <P>
039:         * Clients can use the <code>obtainObject()</code> method to retrieve an
040:         * portlet response object, and <code>releaseObject()</code> to release
041:         * it back to the pool once is done with it.
042:         **/
043:        public class RenderResponsePool extends ObjectPool {
044:
045:            private static java.util.logging.Logger _logger = PortalLogger
046:                    .getLogger(RenderResponsePool.class);
047:
048:            private static class RenderResponsePoolManager implements 
049:                    ObjectManager {
050:
051:                public RenderResponsePoolManager(Logger logger) {
052:                }
053:
054:                /**
055:                 * Creates a new object.
056:                 * <P>
057:                 * @param param Passed in params if needed.
058:                 */
059:                public Object createObject(Object param) {
060:                    RenderResponseImpl rRes = new RenderResponseImpl();
061:
062:                    _logger.finest("PSPL_PAECSPPI0010");
063:
064:                    return rRes;
065:                }
066:
067:                /**
068:                 * Destroys an object.
069:                 */
070:                public void destroyObject(Object o) {
071:                    //do nothing
072:                }
073:            }
074:
075:            // constructor
076:            public RenderResponsePool(int minSize, int maxSize,
077:                    boolean overflow, int partitionSize, Logger logger) {
078:
079:                super (new RenderResponsePoolManager(logger), minSize, maxSize,
080:                        overflow, partitionSize);
081:            }
082:
083:            /**
084:             * Obtains an portlet response object from the pool.
085:             * <P>
086:             * @param res The <code>HttpServletResponse</code> object
087:             * @param writer the <code>StringWriter</code> object
088:             * <P>
089:             * @return <code>RenderResponse</code>
090:             */
091:            public RenderResponse obtainObject(HttpServletRequest req,
092:                    HttpServletResponse res, RenderRequest rReq,
093:                    PortletContainerRenderRequest pContReq,
094:                    PortletContainerRenderResponse pContRes,
095:                    StringWriter writer, ByteArrayOutputStream output,
096:                    PortletDescriptor pDescriptor) {
097:
098:                _logger.finest("PSPL_PAECSPPI0011");
099:
100:                RenderResponseImpl rRes = (RenderResponseImpl) (getPool()
101:                        .obtainObject(null));
102:                rRes.init(req, res, rReq, pContReq, pContRes, writer, output,
103:                        pDescriptor, _logger);
104:                return rRes;
105:            }
106:
107:            /**
108:             * Releases an object back to the pool.
109:             *
110:             * @param <code>RenderResponse</code>
111:             */
112:            public void releaseObject(RenderResponse rRes) {
113:                ((RenderResponseImpl) rRes).clear();
114:                getPool().releaseObject(rRes);
115:                _logger.finest("PSPL_PAECSPPI0012");
116:            }
117:        }
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