Source Code Cross Referenced for WrapperResponseStream.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:         *
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.server.connection;
031:
032:        import com.caucho.log.Log;
033:        import com.caucho.util.L10N;
034:        import com.caucho.vfs.TempBuffer;
035:
036:        import javax.servlet.ServletOutputStream;
037:        import javax.servlet.http.HttpServletResponse;
038:        import java.io.IOException;
039:        import java.io.PrintWriter;
040:        import java.util.logging.Level;
041:        import java.util.logging.Logger;
042:
043:        public class WrapperResponseStream extends AbstractResponseStream {
044:            static final Logger log = Log.open(WrapperResponseStream.class);
045:
046:            static final L10N L = new L10N(WrapperResponseStream.class);
047:
048:            private static final int SIZE = TempBuffer.SIZE;
049:
050:            private final byte[] _byteBuffer = new byte[SIZE];
051:            private final char[] _charBuffer = new char[SIZE];
052:
053:            private HttpServletResponse _next;
054:
055:            private ServletOutputStream _os;
056:            private PrintWriter _writer;
057:
058:            public WrapperResponseStream() {
059:            }
060:
061:            public void init(HttpServletResponse next) {
062:                if (next == null)
063:                    throw new NullPointerException();
064:
065:                _next = next;
066:                _os = null;
067:                _writer = null;
068:            }
069:
070:            /**
071:             * Returns true for a caucho response stream.
072:             */
073:            public boolean isCauchoResponseStream() {
074:                if (_next instanceof  AbstractHttpResponse)
075:                    return ((AbstractHttpResponse) _next)
076:                            .isCauchoResponseStream();
077:                else
078:                    return false;
079:            }
080:
081:            /**
082:             * Sets the buffer size.
083:             */
084:            public void setBufferSize(int size) {
085:                _next.setBufferSize(size);
086:            }
087:
088:            /**
089:             * Gets the buffer size.
090:             */
091:            public int getBufferSize() {
092:                return _next.getBufferSize();
093:            }
094:
095:            /**
096:             * Returns the remaining buffer entries.
097:             */
098:            public int getRemaining() {
099:                //return _next.getRemaining();
100:                return 0;
101:            }
102:
103:            /**
104:             * Returns the char buffer.
105:             */
106:            public char[] getCharBuffer() {
107:                return _charBuffer;
108:            }
109:
110:            /**
111:             * Returns the char buffer offset.
112:             */
113:            public int getCharOffset() {
114:                return 0;
115:            }
116:
117:            /**
118:             * Sets the char buffer offset.
119:             */
120:            public void setCharOffset(int offset) {
121:                if (offset > 0) {
122:                    try {
123:                        print(_charBuffer, 0, offset);
124:                    } catch (IOException e) {
125:                        log.log(Level.FINE, e.toString(), e);
126:                    }
127:                }
128:            }
129:
130:            /**
131:             * Returns the next char buffer.
132:             */
133:            public char[] nextCharBuffer(int offset) throws IOException {
134:                if (offset > 0)
135:                    print(_charBuffer, 0, offset);
136:
137:                return _charBuffer;
138:            }
139:
140:            /**
141:             * Writes the next chunk of data to the response stream.
142:             *
143:             * @param buf the buffer containing the data
144:             * @param offset start offset into the buffer
145:             * @param length length of the data in the buffer
146:             */
147:            public void print(int ch) throws IOException {
148:                if (_writer == null) {
149:                    if (_next == null)
150:                        return;
151:
152:                    _writer = _next.getWriter();
153:                }
154:
155:                _writer.write(ch);
156:            }
157:
158:            /**
159:             * Writes the next chunk of data to the response stream.
160:             *
161:             * @param buf the buffer containing the data
162:             * @param offset start offset into the buffer
163:             * @param length length of the data in the buffer
164:             */
165:            public void print(char[] buffer, int offset, int length)
166:                    throws IOException {
167:                if (length == 0)
168:                    return;
169:
170:                if (_writer == null) {
171:                    if (_next == null)
172:                        return;
173:
174:                    _writer = _next.getWriter();
175:                }
176:
177:                _writer.write(buffer, offset, length);
178:            }
179:
180:            /**
181:             * Returns the buffer offset.
182:             */
183:            public int getBufferOffset() {
184:                return 0;
185:            }
186:
187:            /**
188:             * Sets the byte buffer offset.
189:             */
190:            public void setBufferOffset(int offset) {
191:                if (offset > 0) {
192:                    try {
193:                        write(_byteBuffer, 0, offset);
194:                    } catch (IOException e) {
195:                        log.log(Level.FINE, e.toString(), e);
196:                    }
197:                }
198:            }
199:
200:            /**
201:             * Gets the byte buffer
202:             */
203:            public byte[] getBuffer() {
204:                return _byteBuffer;
205:            }
206:
207:            /**
208:             * Returns the next buffer.
209:             */
210:            public byte[] nextBuffer(int offset) throws IOException {
211:                if (offset > 0)
212:                    write(_byteBuffer, 0, offset);
213:
214:                return _byteBuffer;
215:            }
216:
217:            /**
218:             * Writes the next chunk of data to the response stream.
219:             *
220:             * @param buf the buffer containing the data
221:             * @param offset start offset into the buffer
222:             * @param length length of the data in the buffer
223:             */
224:            public void write(int ch) throws IOException {
225:                if (_os == null) {
226:                    if (_next == null)
227:                        return;
228:
229:                    _os = _next.getOutputStream();
230:                }
231:
232:                _os.write(ch);
233:            }
234:
235:            /**
236:             * Writes the next chunk of data to the response stream.
237:             *
238:             * @param buf the buffer containing the data
239:             * @param offset start offset into the buffer
240:             * @param length length of the data in the buffer
241:             */
242:            public void write(byte[] buf, int offset, int length)
243:                    throws IOException {
244:                if (length == 0)
245:                    return;
246:
247:                if (_os == null) {
248:                    if (_next == null)
249:                        return;
250:
251:                    _os = _next.getOutputStream();
252:                }
253:
254:                _os.write(buf, offset, length);
255:            }
256:
257:            /**
258:             * Writes the char buffer to the output stream.
259:             */
260:            public void flushCharBuffer() throws IOException {
261:            }
262:
263:            /**
264:             * Flushes the buffer.
265:             */
266:            public void flushBuffer() throws IOException {
267:            }
268:
269:            /**
270:             * Flushes the buffer.
271:             */
272:            public void flushChar() throws IOException {
273:                if (_writer == null) {
274:                    if (_next == null)
275:                        return;
276:
277:                    _writer = _next.getWriter();
278:                }
279:
280:                if (_writer != null)
281:                    _writer.flush();
282:            }
283:
284:            /**
285:             * Flushes the buffer.
286:             */
287:            public void flushByte() throws IOException {
288:                if (_os == null) {
289:                    if (_next == null)
290:                        return;
291:
292:                    _os = _next.getOutputStream();
293:                }
294:
295:                if (_os != null)
296:                    _os.flush();
297:            }
298:
299:            /**
300:             * Clears the buffer.
301:             */
302:            public void clearBuffer() {
303:                if (_next != null)
304:                    _next.resetBuffer();
305:            }
306:
307:            /**
308:             * Flushes the output.
309:             */
310:            public void flush() throws IOException {
311:                if (_writer != null)
312:                    _writer.flush();
313:
314:                if (_os != null)
315:                    _os.flush();
316:            }
317:
318:            /**
319:             * Finish.
320:             */
321:            public void finish() throws IOException {
322:                /*
323:                if (_writer != null)
324:                  _writer.flush();
325:                
326:                if (_os != null)
327:                  _os.flush();
328:                 */
329:
330:                _next = null;
331:                _os = null;
332:                _writer = null;
333:            }
334:
335:            /**
336:             * Close.
337:             */
338:            public void close() throws IOException {
339:                // jsp/17f0
340:                PrintWriter writer = _writer;
341:                _writer = null;
342:
343:                if (writer != null) {
344:                    try {
345:                        writer.close();
346:                    } catch (Throwable e) {
347:                        log.log(Level.FINER, e.toString(), e);
348:                    }
349:                }
350:
351:                ServletOutputStream os = _os;
352:                _os = null;
353:
354:                if (os != null) {
355:                    try {
356:                        os.close();
357:                    } catch (Throwable e) {
358:                        log.log(Level.FINER, e.toString(), e);
359:                    }
360:                }
361:
362:                _next = null;
363:            }
364:        }
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