Source Code Cross Referenced for HessianStubFactory.java in  » EJB-Server-resin-3.1.5 » resin » com » caucho » ejb » hessian » 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.ejb.hessian 
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.ejb.hessian;
030:
031:        import com.caucho.java.WorkDir;
032:        import com.caucho.hessian.io.AbstractHessianInput;
033:        import com.caucho.hessian.io.HessianOutput;
034:        import com.caucho.hessian.io.HessianRemoteResolver;
035:        import com.caucho.hessian.io.HessianSerializerInput;
036:        import com.caucho.server.util.CauchoSystem;
037:        import com.caucho.vfs.Path;
038:        import com.caucho.vfs.Vfs;
039:
040:        import java.io.IOException;
041:        import java.io.InputStream;
042:        import java.io.OutputStream;
043:
044:        /**
045:         * Factory for creating Hessian client stubs.  The returned stub will
046:         * call the remote object for all methods.
047:         *
048:         * <pre>
049:         * String url = "http://localhost:8080/ejb/hello";
050:         * HelloHome hello = (HelloHome) factory.create(HelloHome.class, url);
051:         * </pre>
052:         *
053:         * After creation, the stub can be like a regular Java class.  Because
054:         * it makes remote calls, it can throw more exceptions than a Java class.
055:         * In particular, it may throw protocol exceptions.
056:         */
057:
058:        public class HessianStubFactory implements  HessianRemoteResolver {
059:            private HessianRemoteResolver _resolver;
060:            private Path _workPath;
061:
062:            public HessianStubFactory() {
063:                _resolver = this ;
064:            }
065:
066:            /**
067:             * Returns the remote resolver.
068:             */
069:            public HessianRemoteResolver getRemoteResolver() {
070:                return _resolver;
071:            }
072:
073:            public void setWorkPath(Path path) {
074:                _workPath = path;
075:            }
076:
077:            public Path getWorkPath() {
078:                if (_workPath != null)
079:                    return _workPath;
080:                else
081:                    return WorkDir.getLocalWorkDir();
082:            }
083:
084:            /**
085:             * Creates a new proxy with the specified URL.  The returned object
086:             * is a proxy with the interface specified by api.
087:             *
088:             * <pre>
089:             * String url = "http://localhost:8080/ejb/hello");
090:             * HelloHome hello = (HelloHome) factory.create(HelloHome.class, url);
091:             * </pre>
092:             *
093:             * @@param api the interface the proxy class needs to implement
094:             * @@param url the URL where the client object is located.
095:             *
096:             * @@return a proxy to the object with the specified interface.
097:             */
098:            public Object create(Class api, String url) throws Exception {
099:                StubGenerator gen = new StubGenerator();
100:                gen.setClassDir(getWorkPath().lookup("ejb"));
101:
102:                Class cl = gen.createStub(api);
103:
104:                HessianStub stub = (HessianStub) cl.newInstance();
105:
106:                stub._hessian_setURLPath(Vfs.lookup(url));
107:                stub._hessian_setClientContainer(this );
108:
109:                return stub;
110:            }
111:
112:            public AbstractHessianInput getHessianInput(InputStream is) {
113:                AbstractHessianInput in = new HessianSerializerInput(is);
114:                in.setRemoteResolver(_resolver);
115:
116:                return in;
117:            }
118:
119:            public HessianOutput getHessianOutput(OutputStream os) {
120:                return new HessianWriter(os);
121:            }
122:
123:            /**
124:             * Looks up a proxy object.
125:             */
126:            public Object lookup(String type, String url) throws IOException {
127:                try {
128:                    Class api = CauchoSystem.loadClass(type);
129:
130:                    return create(api, url);
131:                } catch (Exception e) {
132:                    throw new IOException(String.valueOf(e));
133:                }
134:            }
135:        }
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