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.burlap;
030:
031: import com.caucho.burlap.client.BurlapProxyFactory;
032: import com.caucho.burlap.io.BurlapInput;
033: import com.caucho.hessian.io.AbstractHessianInput;
034: import com.caucho.hessian.io.AbstractHessianOutput;
035: import com.caucho.hessian.io.HessianRemoteResolver;
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 Burlap 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 BurlapStubFactory implements HessianRemoteResolver {
059: private BurlapProxyFactory _proxyFactory = new BurlapProxyFactory();
060: private HessianRemoteResolver _resolver;
061: private Path _workPath;
062:
063: public BurlapStubFactory() {
064: _resolver = this ;
065: }
066:
067: /**
068: * Returns the remote resolver.
069: */
070: public HessianRemoteResolver getRemoteResolver() {
071: return this ;
072: }
073:
074: public void setWorkPath(Path path) {
075: _workPath = path;
076: }
077:
078: public Path getWorkPath() {
079: return _workPath;
080: }
081:
082: /**
083: * Creates a new proxy with the specified URL. The returned object
084: * is a proxy with the interface specified by api.
085: *
086: * <pre>
087: * String url = "http://localhost:8080/ejb/hello");
088: * HelloHome hello = (HelloHome) factory.create(HelloHome.class, url);
089: * </pre>
090: *
091: * @@param api the interface the proxy class needs to implement
092: * @@param url the URL where the client object is located.
093: *
094: * @@return a proxy to the object with the specified interface.
095: */
096: public Object create(Class api, String url) throws Exception {
097: return _proxyFactory.create(api, url);
098: }
099:
100: public AbstractHessianInput getBurlapInput(InputStream is) {
101: AbstractHessianInput in = new BurlapInput(is);
102: in.setRemoteResolver(_resolver);
103:
104: return in;
105: }
106:
107: public AbstractHessianOutput getBurlapOutput(OutputStream os) {
108: return new BurlapWriter(os);
109: }
110:
111: /**
112: * Looks up a proxy object.
113: */
114: public Object lookup(String type, String url) throws IOException {
115: try {
116: Class api = CauchoSystem.loadClass(type);
117:
118: return create(api, url);
119: } catch (RuntimeException e) {
120: throw e;
121: } catch (Exception e) {
122: IOException e1 = new IOException(e.toString());
123: e1.initCause(e);
124:
125: throw e1;
126: }
127: }
128: }
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