1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany.sca.binding.ejb.corba;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Collections;
import java.util.Map;
import javax.ejb.EJBObject;
import javax.rmi.CORBA.Stub;
import javax.rmi.CORBA.Util;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;
import org.omg.CORBA.SystemException;
import org.omg.CORBA.portable.ApplicationException;
import org.omg.CORBA.portable.RemarshalException;
import org.omg.CORBA.portable.ServantObject;
import org.omg.CORBA_2_3.portable.InputStream;
import org.omg.CORBA_2_3.portable.OutputStream;
/**
* @version $Revision$ $Date$
*/
public class StubMethodInterceptor implements MethodInterceptor {
private static final Method ISIDENTICAL;
static {
try {
ISIDENTICAL = EJBObject.class.getMethod("isIdentical", new Class[]{EJBObject.class});
} catch (NoSuchMethodException e) {
throw new ExceptionInInitializerError(e);
}
}
private final Class type;
private final Map operations;
public StubMethodInterceptor(Class type) {
this.type = type;
this.operations = Collections.unmodifiableMap(org.apache.tuscany.sca.binding.ejb.corba.Java2IDLUtil.mapMethodToOperation(type));
}
public Object intercept(Object proxy, Method method, Object[] args, MethodProxy methodProxy) throws Throwable {
Stub stub = (Stub) proxy;
// handle is identical in stub to avoid unnecessary round trip
if (method.equals(ISIDENTICAL)) {
org.omg.CORBA.Object otherObject = (org.omg.CORBA.Object) args[0];
return new Boolean(stub._is_equivalent(otherObject));
}
// get the operation name object
String operationName = (String) operations.get(method);
if (operationName == null) {
throw new IllegalStateException("Unknown method: " + method);
}
while (true) {
// if this is a stub to a remote object we invoke over the wire
if (!Util.isLocal(stub)) {
InputStream in = null;
try {
// create the request output stream
OutputStream out = (OutputStream) stub._request(operationName, true);
// write the arguments
Class[] parameterTypes = method.getParameterTypes();
for (int i = 0; i < parameterTypes.length; i++) {
Class parameterType = parameterTypes[i];
org.apache.tuscany.sca.binding.ejb.corba.Java2IDLUtil.writeObject(parameterType, args[i], out);
}
// send the invocation
in = (InputStream) stub._invoke(out);
// read the result
Object result = org.apache.tuscany.sca.binding.ejb.corba.Java2IDLUtil.readObject(method.getReturnType(), in);
return result;
} catch (RemarshalException exception) {
continue;
} catch (ApplicationException exception) {
org.apache.tuscany.sca.binding.ejb.corba.Java2IDLUtil.throwException(method, (InputStream) exception.getInputStream());
} catch (SystemException e) {
throw Util.mapSystemException(e);
} finally {
stub._releaseReply(in);
}
} else {
// get the servant
ServantObject servantObject = stub._servant_preinvoke(operationName, type);
if (servantObject == null) {
continue;
}
try {
// copy the arguments
Object[] argsCopy = Util.copyObjects(args, stub._orb());
// invoke the servant
Object result = null;
try {
result = method.invoke(servantObject.servant, argsCopy);
} catch (InvocationTargetException e) {
if (e.getCause() != null) {
throw e.getCause();
}
throw e;
}
// copy the result
result = Util.copyObject(result, stub._orb());
return result;
} catch (Throwable throwable) {
// copy the exception
Throwable throwableCopy = (Throwable) Util.copyObject(throwable, stub._orb());
// if it is one of my exception rethrow it
Class[] exceptionTypes = method.getExceptionTypes();
for (int i = 0; i < exceptionTypes.length; i++) {
Class exceptionType = exceptionTypes[i];
if (exceptionType.isInstance(throwableCopy)) {
throw throwableCopy;
}
}
throw Util.wrapException(throwableCopy);
} finally {
stub._servant_postinvoke(servantObject);
}
}
}
}
}
|
