Source Code Cross Referenced for ResponseAdapter.java in  » EJB-Server-resin-3.1.5 » resin » com » caucho » server » connection » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » EJB Server resin 3.1.5 » resin » com.caucho.server.connection 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


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:         *   Free SoftwareFoundation, Inc.
023:         *   59 Temple Place, Suite 330
024:         *   Boston, MA 02111-1307  USA
025:         *
026:         * @author Scott Ferguson
027:         */
028:
029:        package com.caucho.server.connection;
030:
031:        import com.caucho.log.Log;
032:        import com.caucho.util.FreeList;
033:        import com.caucho.vfs.FlushBuffer;
034:
035:        import javax.servlet.ServletOutputStream;
036:        import javax.servlet.ServletResponse;
037:        import javax.servlet.http.Cookie;
038:        import javax.servlet.http.HttpServletResponse;
039:        import java.io.IOException;
040:        import java.io.PrintWriter;
041:        import java.io.UnsupportedEncodingException;
042:        import java.util.logging.Logger;
043:
044:        public class ResponseAdapter extends ResponseWrapper implements 
045:                CauchoResponse {
046:            private static final Logger log = Logger
047:                    .getLogger(ResponseAdapter.class.getName());
048:
049:            private static final FreeList<ResponseAdapter> _freeList = new FreeList<ResponseAdapter>(
050:                    32);
051:
052:            protected RequestAdapter _request;
053:
054:            protected FlushBuffer _flushBuffer;
055:
056:            protected AbstractResponseStream _originalResponseStream;
057:            protected AbstractResponseStream _responseStream;
058:
059:            private ServletOutputStreamImpl _os;
060:            private ResponseWriter _writer;
061:
062:            private boolean _hasOutputStream;
063:            private boolean _hasError;
064:
065:            private ResponseAdapter() {
066:            }
067:
068:            protected ResponseAdapter(HttpServletResponse response) {
069:                setResponse(response);
070:
071:                _originalResponseStream = createWrapperResponseStream();
072:
073:                _os = new ServletOutputStreamImpl();
074:                _writer = new ResponseWriter();
075:            }
076:
077:            /**
078:             * Creates a new ResponseAdapter.
079:             */
080:            public static ResponseAdapter create(HttpServletResponse response) {
081:                ResponseAdapter resAdapt = _freeList.allocate();
082:
083:                if (resAdapt == null)
084:                    resAdapt = new ResponseAdapter(response);
085:                else
086:                    resAdapt.setResponse(response);
087:
088:                resAdapt.init(response);
089:
090:                return resAdapt;
091:            }
092:
093:            void setRequest(RequestAdapter request) {
094:                _request = request;
095:            }
096:
097:            protected AbstractResponseStream createWrapperResponseStream() {
098:                return new WrapperResponseStream();
099:            }
100:
101:            public void init(HttpServletResponse response) {
102:                setResponse(response);
103:                _hasError = false;
104:
105:                _responseStream = _originalResponseStream;
106:                if (_originalResponseStream instanceof  WrapperResponseStream) {
107:                    WrapperResponseStream wrapper = (WrapperResponseStream) _originalResponseStream;
108:                    wrapper.init(response);
109:                }
110:
111:                _originalResponseStream.start();
112:
113:                _os.init(_originalResponseStream);
114:                _writer.init(_originalResponseStream);
115:            }
116:
117:            public AbstractResponseStream getResponseStream() {
118:                return _responseStream;
119:            }
120:
121:            public boolean isCauchoResponseStream() {
122:                return false;
123:            }
124:
125:            public void setResponseStream(AbstractResponseStream responseStream) {
126:                _responseStream = responseStream;
127:
128:                _os.init(responseStream);
129:                _writer.init(responseStream);
130:            }
131:
132:            public boolean isTop() {
133:                return false;
134:            }
135:
136:            public void resetBuffer() {
137:                super .resetBuffer();
138:
139:                _responseStream.clearBuffer();
140:            }
141:
142:            public void sendRedirect(String url) throws IOException {
143:                resetBuffer();
144:
145:                super .sendRedirect(url);
146:            }
147:
148:            @Override
149:            public int getBufferSize() {
150:                return _responseStream.getBufferSize();
151:            }
152:
153:            @Override
154:            public void setBufferSize(int size) {
155:                _responseStream.setBufferSize(size);
156:            }
157:
158:            public ServletOutputStream getOutputStream() throws IOException {
159:                return _os;
160:            }
161:
162:            /**
163:             * Sets the flush buffer
164:             */
165:            public void setFlushBuffer(FlushBuffer flushBuffer) {
166:                _flushBuffer = flushBuffer;
167:            }
168:
169:            /**
170:             * Gets the flush buffer
171:             */
172:            public FlushBuffer getFlushBuffer() {
173:                return _flushBuffer;
174:            }
175:
176:            public PrintWriter getWriter() throws IOException {
177:                return _writer;
178:            }
179:
180:            public void setContentType(String value) {
181:                super .setContentType(value);
182:
183:                try {
184:                    _responseStream.setEncoding(getCharacterEncoding());
185:                } catch (UnsupportedEncodingException e) {
186:                }
187:            }
188:
189:            public void addCookie(Cookie cookie) {
190:                if (_request != null)
191:                    _request.setHasCookie();
192:
193:                super .addCookie(cookie);
194:            }
195:
196:            /*
197:             * caucho
198:             */
199:
200:            public String getHeader(String key) {
201:                return null;
202:            }
203:
204:            public boolean disableHeaders(boolean disable) {
205:                return false;
206:            }
207:
208:            public void setFooter(String key, String value) {
209:            }
210:
211:            public void addFooter(String key, String value) {
212:            }
213:
214:            public int getRemaining() {
215:                return _responseStream.getRemaining();
216:            }
217:
218:            /**
219:             * When set to true, RequestDispatcher.forward() is disallowed on
220:             * this stream.
221:             */
222:            public void setForbidForward(boolean forbid) {
223:            }
224:
225:            /**
226:             * Returns true if RequestDispatcher.forward() is disallowed on
227:             * this stream.
228:             */
229:            public boolean getForbidForward() {
230:                return false;
231:            }
232:
233:            /**
234:             * Set to true while processing an error.
235:             */
236:            public void setHasError(boolean hasError) {
237:                _hasError = hasError;
238:            }
239:
240:            /**
241:             * Returns true if we're processing an error.
242:             */
243:            public boolean hasError() {
244:                return _hasError;
245:            }
246:
247:            /**
248:             * Kills the cache for an error.
249:             */
250:            public void killCache() {
251:                if (getResponse() instanceof  CauchoResponse)
252:                    ((CauchoResponse) getResponse()).killCache();
253:            }
254:
255:            /**
256:             * Sets private caching
257:             */
258:            public void setPrivateCache(boolean isPrivate) {
259:                if (getResponse() instanceof  CauchoResponse)
260:                    ((CauchoResponse) getResponse()).setPrivateCache(isPrivate);
261:            }
262:
263:            /**
264:             * Sets no caching
265:             */
266:            public void setNoCache(boolean isPrivate) {
267:                if (getResponse() instanceof  CauchoResponse)
268:                    ((CauchoResponse) getResponse()).setNoCache(isPrivate);
269:            }
270:
271:            public void setSessionId(String id) {
272:                if (getResponse() instanceof  CauchoResponse)
273:                    ((CauchoResponse) getResponse()).setSessionId(id);
274:            }
275:
276:            public void finish() throws IOException {
277:                if (_responseStream != null)
278:                    _responseStream.flushBuffer();
279:
280:                _responseStream = _originalResponseStream;
281:            }
282:
283:            public void close() throws IOException {
284:                ServletResponse response = getResponse();
285:
286:                AbstractResponseStream responseStream = _responseStream;
287:                _responseStream = _originalResponseStream;
288:
289:                if (responseStream != null)
290:                    responseStream.close();
291:
292:                if (_originalResponseStream != responseStream)
293:                    _originalResponseStream.close();
294:
295:                if (response instanceof  CauchoResponse) {
296:                    ((CauchoResponse) response).close();
297:                }
298:                /*
299:                else {
300:                  try {
301:                PrintWriter writer = response.getWriter();
302:                writer.close();
303:                  } catch (Throwable e) {
304:                  }
305:
306:                  try {
307:                OutputStream os = response.getOutputStream();
308:                os.close();
309:                  } catch (Throwable e) {
310:                  }
311:                }
312:                 */
313:            }
314:
315:            public static void free(ResponseAdapter resAdapt) {
316:                resAdapt.free();
317:
318:                _freeList.free(resAdapt);
319:            }
320:
321:            /**
322:             * Clears the adapter.
323:             */
324:            protected void free() {
325:                _request = null;
326:                _responseStream = null;
327:
328:                setResponse(null);
329:            }
330:        }
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