001: /*
002: * Copyright (c) 2001-2004 Caucho Technology, Inc. All rights reserved.
003: *
004: * The Apache Software License, Version 1.1
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 "Hessian", "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.hessian.server;
050:
051: import com.caucho.hessian.io.AbstractHessianInput;
052: import com.caucho.hessian.io.AbstractHessianOutput;
053: import com.caucho.services.server.AbstractSkeleton;
054: import com.caucho.services.server.ServiceContext;
055:
056: import java.lang.reflect.InvocationTargetException;
057: import java.lang.reflect.Method;
058: import java.util.logging.Level;
059: import java.util.logging.Logger;
060:
061: /**
062: * Proxy class for Hessian services.
063: */
064: public class HessianSkeleton extends AbstractSkeleton {
065: private static final Logger log = Logger
066: .getLogger(HessianSkeleton.class.getName());
067:
068: private Object _service;
069:
070: /**
071: * Create a new hessian skeleton.
072: *
073: * @param service the underlying service object.
074: * @param apiClass the API interface
075: */
076: public HessianSkeleton(Object service, Class apiClass) {
077: super (apiClass);
078:
079: if (service == null)
080: service = this ;
081:
082: _service = service;
083:
084: if (!apiClass.isAssignableFrom(service.getClass()))
085: throw new IllegalArgumentException("Service " + service
086: + " must be an instance of " + apiClass.getName());
087: }
088:
089: /**
090: * Create a new hessian skeleton.
091: *
092: * @param service the underlying service object.
093: * @param apiClass the API interface
094: */
095: public HessianSkeleton(Class apiClass) {
096: super (apiClass);
097: }
098:
099: /**
100: * Invoke the object with the request from the input stream.
101: *
102: * @param in the Hessian input stream
103: * @param out the Hessian output stream
104: */
105: public void invoke(AbstractHessianInput in,
106: AbstractHessianOutput out) throws Exception {
107: invoke(_service, in, out);
108: }
109:
110: /**
111: * Invoke the object with the request from the input stream.
112: *
113: * @param in the Hessian input stream
114: * @param out the Hessian output stream
115: */
116: public void invoke(Object service, AbstractHessianInput in,
117: AbstractHessianOutput out) throws Exception {
118: ServiceContext context = ServiceContext.getContext();
119:
120: // backward compatibility for some frameworks that don't read
121: // the call type first
122: in.skipOptionalCall();
123:
124: String header;
125: while ((header = in.readHeader()) != null) {
126: Object value = in.readObject();
127:
128: context.addHeader(header, value);
129: }
130:
131: String methodName = in.readMethod();
132: Method method = getMethod(methodName);
133:
134: if (method != null) {
135: } else if ("_hessian_getAttribute".equals(methodName)) {
136: String attrName = in.readString();
137: in.completeCall();
138:
139: String value = null;
140:
141: if ("java.api.class".equals(attrName))
142: value = getAPIClassName();
143: else if ("java.home.class".equals(attrName))
144: value = getHomeClassName();
145: else if ("java.object.class".equals(attrName))
146: value = getObjectClassName();
147:
148: out.startReply();
149:
150: out.writeObject(value);
151:
152: out.completeReply();
153: return;
154: } else if (method == null) {
155: out.startReply();
156: out.writeFault("NoSuchMethodException",
157: "The service has no method named: "
158: + in.getMethod(), null);
159: out.completeReply();
160: return;
161: }
162:
163: Class[] args = method.getParameterTypes();
164: Object[] values = new Object[args.length];
165:
166: for (int i = 0; i < args.length; i++) {
167: values[i] = in.readObject(args[i]);
168: }
169:
170: Object result = null;
171:
172: try {
173: result = method.invoke(service, values);
174: } catch (Throwable e) {
175: if (e instanceof InvocationTargetException)
176: e = ((InvocationTargetException) e)
177: .getTargetException();
178:
179: log.log(Level.WARNING, e.toString(), e);
180:
181: out.startReply();
182: out.writeFault("ServiceException", e.getMessage(), e);
183: out.completeReply();
184: return;
185: }
186:
187: // The complete call needs to be after the invoke to handle a
188: // trailing InputStream
189: in.completeCall();
190:
191: out.startReply();
192:
193: out.writeObject(result);
194:
195: out.completeReply();
196: out.close();
197: }
198: }
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