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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/*
* 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.core.invocation;
import java.lang.reflect.InvocationTargetException;
import java.util.UUID;
import java.util.concurrent.ExecutorService;
import org.apache.tuscany.sca.assembly.Endpoint;
import org.apache.tuscany.sca.assembly.EndpointReference;
import org.apache.tuscany.sca.context.ThreadMessageContext;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.FactoryExtensionPoint;
import org.apache.tuscany.sca.core.UtilityExtensionPoint;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.invocation.InvocationChain;
import org.apache.tuscany.sca.invocation.Invoker;
import org.apache.tuscany.sca.invocation.InvokerAsyncRequest;
import org.apache.tuscany.sca.invocation.InvokerAsyncResponse;
import org.apache.tuscany.sca.invocation.Message;
import org.apache.tuscany.sca.invocation.MessageFactory;
import org.apache.tuscany.sca.runtime.Invocable;
import org.apache.tuscany.sca.runtime.RuntimeEndpointReference;
import org.apache.tuscany.sca.work.WorkScheduler;
import org.oasisopen.sca.ServiceRuntimeException;
/**
* Invoker for a endpoint or endpoint reference
* @version $Rev$ $Date$
*/
public class RuntimeInvoker implements Invoker, InvokerAsyncRequest {
protected ExtensionPointRegistry registry;
protected MessageFactory messageFactory;
protected Invocable invocable;
// Run async service invocations using a ThreadPoolExecutor
private ExecutorService theExecutor;
public RuntimeInvoker(ExtensionPointRegistry registry, Invocable invocable) {
this.registry = registry;
this.messageFactory = registry.getExtensionPoint(FactoryExtensionPoint.class).getFactory(MessageFactory.class);
this.invocable = invocable;
UtilityExtensionPoint utilities = registry.getExtensionPoint(UtilityExtensionPoint.class);
WorkScheduler scheduler = utilities.getUtility(WorkScheduler.class);
theExecutor = scheduler.getExecutorService();
}
public Message invokeBinding(Message msg) {
Message context = ThreadMessageContext.setMessageContext(msg);
try {
return invocable.getBindingInvocationChain().getHeadInvoker().invoke(msg);
} finally {
ThreadMessageContext.setMessageContext(context);
}
} // end method invokeBinding
/**
* Async Invoke of the Binding Chain
* @param msg - the message to use in the invocation
*/
public void invokeBindingAsync(Message msg) {
Message context = ThreadMessageContext.setMessageContext(msg);
try {
((InvokerAsyncRequest)invocable.getBindingInvocationChain().getHeadInvoker()).invokeAsyncRequest(msg);
} catch (Throwable t ) {
// TODO - consider what best to do with exception
t.printStackTrace();
} finally {
ThreadMessageContext.setMessageContext(context);
} // end try
} // end method invokeBindingAsync
public Message invoke(Message msg) {
return invoke(msg.getOperation(), msg);
}
public Object invoke(Operation operation, Object[] args) throws InvocationTargetException {
Message msg = messageFactory.createMessage();
msg.setBody(args);
Message resp = invoke(operation, msg);
Object body = resp.getBody();
if (resp.isFault()) {
throw new InvocationTargetException((Throwable)body);
}
return body;
}
public Message invoke(Operation operation, Message msg) {
InvocationChain chain = invocable.getInvocationChain(operation);
return invoke(chain, msg);
}
public Message invoke(InvocationChain chain, Message msg) {
if (invocable instanceof Endpoint) {
msg.setTo((Endpoint)invocable);
} else if (invocable instanceof EndpointReference) {
msg.setFrom((EndpointReference)invocable);
}
Invoker headInvoker = chain.getHeadInvoker();
Operation operation = chain.getTargetOperation();
msg.setOperation(operation);
Message msgContext = ThreadMessageContext.setMessageContext(msg);
try {
return headInvoker.invoke(msg);
} finally {
ThreadMessageContext.setMessageContext(msgContext);
}
}
/**
* Initiate the sending of the forward part of an asynchronous
* exchange along the request part of the wire.
*
* @param msg the request message
*/
public void invokeAsync(Message msg) {
if (invocable instanceof Endpoint) {
Endpoint ep = (Endpoint)invocable;
msg.setTo(ep);
if (!ep.isAsyncInvocation()){
throw new ServiceRuntimeException("Calling invokeAsync on a non-async endpoint - " +
ep);
}
} else if (invocable instanceof EndpointReference) {
RuntimeEndpointReference epr = (RuntimeEndpointReference)invocable;
if (!epr.isAsyncInvocation()){
throw new ServiceRuntimeException("Calling invokeAsync on a non-async endpoint reference - " +
epr);
}
if (epr.isOutOfDate()) {
epr.rebuild();
}
msg.setFrom(epr);
msg.setTo(epr.getTargetEndpoint());
}
Operation operation = msg.getOperation();
InvocationChain chain = invocable.getInvocationChain(operation);
if (chain == null) {
throw new IllegalArgumentException("No matching operation is found: " + operation.getName());
}
// create an async message ID if there isn't one there already
if (!msg.getHeaders().containsKey(Constants.MESSAGE_ID)){
msg.getHeaders().put(Constants.MESSAGE_ID, UUID.randomUUID().toString());UUID.randomUUID().toString();
}
// Perform the async invocation
Invoker headInvoker = chain.getHeadInvoker();
Message msgContext = ThreadMessageContext.setMessageContext(msg);
try {
try {
((InvokerAsyncRequest)headInvoker).invokeAsyncRequest(msg);
} catch (ServiceRuntimeException ex) {
throw ex;
} catch (Throwable ex) {
// temporary fix to swallow the dummy exception that's
// thrown back to get past the response chain processing.
if (!(ex instanceof AsyncResponseException)){
throw new ServiceRuntimeException(ex);
}
}
} finally {
ThreadMessageContext.setMessageContext(msgContext);
}
return;
}
/**
* Initiate the sending of the response part of an asynchronous
* exchange along the response part of the wire.
*
* @param msg the response message
*/
public void invokeAsyncResponse(Message msg) {
InvocationChain chain = invocable.getInvocationChain(msg.getOperation());
Invoker tailInvoker = chain.getTailInvoker();
((InvokerAsyncResponse)tailInvoker).invokeAsyncResponse(msg);
} // end method invokeAsyncResponse
@Override
public void invokeAsyncRequest(Message msg) throws Throwable {
invokeAsync(msg);
} // end method invokeAsyncRequest
}
|
