Source Code Cross Referenced for BurlapProxyFactory.java in  » Web-Services » hessian » com » caucho » burlap » client » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Services » hessian » com.caucho.burlap.client 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * The Apache Software License, Version 1.1
003:         *
004:         * Copyright (c) 2001-2004 Caucho Technology, Inc.  All rights reserved.
005:         *
006:         * Redistribution and use in source and binary forms, with or without
007:         * modification, are permitted provided that the following conditions
008:         * are met:
009:         *
010:         * 1. Redistributions of source code must retain the above copyright
011:         *    notice, this list of conditions and the following disclaimer.
012:         *
013:         * 2. Redistributions in binary form must reproduce the above copyright
014:         *    notice, this list of conditions and the following disclaimer in
015:         *    the documentation and/or other materials provided with the
016:         *    distribution.
017:         *
018:         * 3. The end-user documentation included with the redistribution, if
019:         *    any, must include the following acknowlegement:
020:         *       "This product includes software developed by the
021:         *        Caucho Technology (http://www.caucho.com/)."
022:         *    Alternately, this acknowlegement may appear in the software itself,
023:         *    if and wherever such third-party acknowlegements normally appear.
024:         *
025:         * 4. The names "Burlap", "Resin", and "Caucho" must not be used to
026:         *    endorse or promote products derived from this software without prior
027:         *    written permission. For written permission, please contact
028:         *    info@caucho.com.
029:         *
030:         * 5. Products derived from this software may not be called "Resin"
031:         *    nor may "Resin" appear in their names without prior written
032:         *    permission of Caucho Technology.
033:         *
034:         * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
035:         * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
036:         * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
037:         * DISCLAIMED.  IN NO EVENT SHALL CAUCHO TECHNOLOGY OR ITS CONTRIBUTORS
038:         * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
039:         * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
040:         * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
041:         * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
042:         * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
043:         * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
044:         * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
045:         *
046:         * @author Scott Ferguson
047:         */
048:
049:        package com.caucho.burlap.client;
050:
051:        import com.caucho.burlap.io.AbstractBurlapInput;
052:        import com.caucho.burlap.io.BurlapInput;
053:        import com.caucho.burlap.io.BurlapOutput;
054:        import com.caucho.burlap.io.BurlapRemoteObject;
055:        import com.caucho.burlap.io.BurlapRemoteResolver;
056:        import com.caucho.services.client.ServiceProxyFactory;
057:
058:        import javax.naming.Context;
059:        import javax.naming.Name;
060:        import javax.naming.NamingException;
061:        import javax.naming.RefAddr;
062:        import javax.naming.Reference;
063:        import javax.naming.spi.ObjectFactory;
064:        import java.io.IOException;
065:        import java.io.InputStream;
066:        import java.io.OutputStream;
067:        import java.lang.reflect.Proxy;
068:        import java.net.HttpURLConnection;
069:        import java.net.MalformedURLException;
070:        import java.net.URL;
071:        import java.net.URLConnection;
072:        import java.util.Hashtable;
073:
074:        /**
075:         * Factory for creating Burlap client stubs.  The returned stub will
076:         * call the remote object for all methods.
077:         *
078:         * <pre>
079:         * String url = "http://localhost:8080/ejb/hello";
080:         * HelloHome hello = (HelloHome) factory.create(HelloHome.class, url);
081:         * </pre>
082:         *
083:         * After creation, the stub can be like a regular Java class.  Because
084:         * it makes remote calls, it can throw more exceptions than a Java class.
085:         * In particular, it may throw protocol exceptions.
086:         *
087:         * The factory can also be configured as a JNDI resource.  The factory
088:         * expects to parameters: "type" and "url", corresponding to the two
089:         * arguments to <code>create</code>
090:         *
091:         * In Resin 3.0, the above example would be configured as:
092:         * <pre>
093:         * &lt;reference>
094:         *   &lt;name>hessian/hello&lt;/name>
095:         *   &lt;factory>com.caucho.hessian.client.HessianProxyFactory&lt;/factory>
096:         *   &lt;init url="http://localhost:8080/ejb/hello"/>
097:         *         type="test.HelloHome"/>
098:         * &lt;/reference>
099:         * </pre>
100:         *
101:         * To get the above resource, use JNDI as follows:
102:         * <pre>
103:         * Context ic = new InitialContext();
104:         * HelloHome hello = (HelloHome) ic.lookup("java:comp/env/burlap/hello");
105:         *
106:         * System.out.println("Hello: " + hello.helloWorld());
107:         * </pre>
108:         *
109:         * <h3>Authentication</h3>
110:         *
111:         * <p>The proxy can use HTTP basic authentication if the user and the
112:         * password are set.
113:         */
114:        public class BurlapProxyFactory implements  ServiceProxyFactory,
115:                ObjectFactory {
116:            private BurlapRemoteResolver _resolver;
117:
118:            private String _user;
119:            private String _password;
120:            private String _basicAuth;
121:
122:            private boolean _isOverloadEnabled = false;
123:
124:            /**
125:             * Creates the new proxy factory.
126:             */
127:            public BurlapProxyFactory() {
128:                _resolver = new BurlapProxyResolver(this );
129:            }
130:
131:            /**
132:             * Sets the user.
133:             */
134:            public void setUser(String user) {
135:                _user = user;
136:                _basicAuth = null;
137:            }
138:
139:            /**
140:             * Sets the password.
141:             */
142:            public void setPassword(String password) {
143:                _password = password;
144:                _basicAuth = null;
145:            }
146:
147:            /**
148:             * Returns true if overloaded methods are allowed (using mangling)
149:             */
150:            public boolean isOverloadEnabled() {
151:                return _isOverloadEnabled;
152:            }
153:
154:            /**
155:             * set true if overloaded methods are allowed (using mangling)
156:             */
157:            public void setOverloadEnabled(boolean isOverloadEnabled) {
158:                _isOverloadEnabled = isOverloadEnabled;
159:            }
160:
161:            /**
162:             * Returns the remote resolver.
163:             */
164:            public BurlapRemoteResolver getRemoteResolver() {
165:                return _resolver;
166:            }
167:
168:            /**
169:             * Creates the URL connection.
170:             */
171:            protected URLConnection openConnection(URL url) throws IOException {
172:                URLConnection conn = url.openConnection();
173:
174:                conn.setDoOutput(true);
175:
176:                if (_basicAuth != null)
177:                    conn.setRequestProperty("Authorization", _basicAuth);
178:                else if (_user != null && _password != null) {
179:                    _basicAuth = "Basic " + base64(_user + ":" + _password);
180:                    conn.setRequestProperty("Authorization", _basicAuth);
181:                }
182:
183:                return conn;
184:            }
185:
186:            /**
187:             * Creates a new proxy with the specified URL.  The API class uses
188:             * the java.api.class value from _hessian_
189:             *
190:             * @param url the URL where the client object is located.
191:             *
192:             * @return a proxy to the object with the specified interface.
193:             */
194:            public Object create(String url) throws MalformedURLException,
195:                    ClassNotFoundException {
196:                BurlapMetaInfoAPI metaInfo;
197:
198:                metaInfo = (BurlapMetaInfoAPI) create(BurlapMetaInfoAPI.class,
199:                        url);
200:
201:                String apiClassName = (String) metaInfo
202:                        ._burlap_getAttribute("java.api.class");
203:
204:                if (apiClassName == null)
205:                    throw new BurlapRuntimeException(url
206:                            + " has an unknown api.");
207:
208:                ClassLoader loader = Thread.currentThread()
209:                        .getContextClassLoader();
210:
211:                Class apiClass = Class.forName(apiClassName, false, loader);
212:
213:                return create(apiClass, url);
214:            }
215:
216:            /**
217:             * Creates a new proxy with the specified URL.  The returned object
218:             * is a proxy with the interface specified by api.
219:             *
220:             * <pre>
221:             * String url = "http://localhost:8080/ejb/hello");
222:             * HelloHome hello = (HelloHome) factory.create(HelloHome.class, url);
223:             * </pre>
224:             *
225:             * @param api the interface the proxy class needs to implement
226:             * @param url the URL where the client object is located.
227:             *
228:             * @return a proxy to the object with the specified interface.
229:             */
230:            public Object create(Class api, String urlName)
231:                    throws MalformedURLException {
232:                if (api == null)
233:                    throw new NullPointerException();
234:
235:                URL url = new URL(urlName);
236:
237:                try {
238:                    // clear old keepalive connections
239:                    HttpURLConnection conn = (HttpURLConnection) url
240:                            .openConnection();
241:
242:                    conn.setRequestProperty("Connection", "close");
243:
244:                    InputStream is = conn.getInputStream();
245:
246:                    is.close();
247:
248:                    conn.disconnect();
249:                } catch (IOException e) {
250:                }
251:
252:                BurlapProxy handler = new BurlapProxy(this , url);
253:
254:                return Proxy.newProxyInstance(api.getClassLoader(),
255:                        new Class[] { api, BurlapRemoteObject.class }, handler);
256:            }
257:
258:            public AbstractBurlapInput getBurlapInput(InputStream is) {
259:                AbstractBurlapInput in = new BurlapInput(is);
260:                in.setRemoteResolver(getRemoteResolver());
261:
262:                return in;
263:            }
264:
265:            public BurlapOutput getBurlapOutput(OutputStream os) {
266:                BurlapOutput out = new BurlapOutput(os);
267:
268:                return out;
269:            }
270:
271:            /**
272:             * JNDI object factory so the proxy can be used as a resource.
273:             */
274:            public Object getObjectInstance(Object obj, Name name,
275:                    Context nameCtx, Hashtable<?, ?> environment)
276:                    throws Exception {
277:                Reference ref = (Reference) obj;
278:
279:                String api = null;
280:                String url = null;
281:                String user = null;
282:                String password = null;
283:
284:                for (int i = 0; i < ref.size(); i++) {
285:                    RefAddr addr = ref.get(i);
286:
287:                    String type = addr.getType();
288:                    String value = (String) addr.getContent();
289:
290:                    if (type.equals("type"))
291:                        api = value;
292:                    else if (type.equals("url"))
293:                        url = value;
294:                    else if (type.equals("user"))
295:                        setUser(value);
296:                    else if (type.equals("password"))
297:                        setPassword(value);
298:                }
299:
300:                if (url == null)
301:                    throw new NamingException(
302:                            "`url' must be configured for BurlapProxyFactory.");
303:                // XXX: could use meta protocol to grab this
304:                if (api == null)
305:                    throw new NamingException(
306:                            "`type' must be configured for BurlapProxyFactory.");
307:
308:                ClassLoader loader = Thread.currentThread()
309:                        .getContextClassLoader();
310:                Class apiClass = Class.forName(api, false, loader);
311:
312:                return create(apiClass, url);
313:            }
314:
315:            /**
316:             * Creates the Base64 value.
317:             */
318:            private String base64(String value) {
319:                StringBuffer cb = new StringBuffer();
320:
321:                int i = 0;
322:                for (i = 0; i + 2 < value.length(); i += 3) {
323:                    long chunk = (int) value.charAt(i);
324:                    chunk = (chunk << 8) + (int) value.charAt(i + 1);
325:                    chunk = (chunk << 8) + (int) value.charAt(i + 2);
326:
327:                    cb.append(encode(chunk >> 18));
328:                    cb.append(encode(chunk >> 12));
329:                    cb.append(encode(chunk >> 6));
330:                    cb.append(encode(chunk));
331:                }
332:
333:                if (i + 1 < value.length()) {
334:                    long chunk = (int) value.charAt(i);
335:                    chunk = (chunk << 8) + (int) value.charAt(i + 1);
336:                    chunk <<= 8;
337:
338:                    cb.append(encode(chunk >> 18));
339:                    cb.append(encode(chunk >> 12));
340:                    cb.append(encode(chunk >> 6));
341:                    cb.append('=');
342:                } else if (i < value.length()) {
343:                    long chunk = (int) value.charAt(i);
344:                    chunk <<= 16;
345:
346:                    cb.append(encode(chunk >> 18));
347:                    cb.append(encode(chunk >> 12));
348:                    cb.append('=');
349:                    cb.append('=');
350:                }
351:
352:                return cb.toString();
353:            }
354:
355:            public static char encode(long d) {
356:                d &= 0x3f;
357:                if (d < 26)
358:                    return (char) (d + 'A');
359:                else if (d < 52)
360:                    return (char) (d + 'a' - 26);
361:                else if (d < 62)
362:                    return (char) (d + '0' - 52);
363:                else if (d == 62)
364:                    return '+';
365:                else
366:                    return '/';
367:            }
368:        }
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