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
|
/*
* 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.spi.services.discovery;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamReader;
import org.apache.tuscany.host.RuntimeInfo;
import org.apache.tuscany.spi.annotation.Autowire;
import org.osoa.sca.annotations.Destroy;
import org.osoa.sca.annotations.EagerInit;
import org.osoa.sca.annotations.Init;
/**
* Abstract implementation of the discovery service.
*
* @version $Revision$ $Date$
*
*/
@EagerInit
public abstract class AbstractDiscoveryService implements DiscoveryService {
/** Runtime info. */
private RuntimeInfo runtimeInfo;
/** Request listeners. */
private Map<QName, RequestListener> requestListenerMap = new ConcurrentHashMap<QName, RequestListener>();
/** Response listeners. */
private Map<QName, ResponseListener> responseListenerMap = new ConcurrentHashMap<QName, ResponseListener>();
/**
* Registers a request listener for async messages.
*
* @param messageType Message type that can be handled by the listener.
* @param listener Recipient of the async message.
*/
public void registerRequestListener(QName messageType, RequestListener listener) {
requestListenerMap.put(messageType, listener);
}
/**
* Registers a response listener for async messages.
*
* @param messageType Message type that can be handled by the listener.
* @param listener Recipient of the async message.
*/
public void registerResponseListener(QName messageType, ResponseListener listener) {
responseListenerMap.put(messageType, listener);
}
/**
* Sets the runtime info for the runtime using the discovery service.
*
* @param runtimeInfo Runtime info for the runtime using the discovery service.
*/
@Autowire
public final void setRuntimeInfo(RuntimeInfo runtimeInfo) {
this.runtimeInfo = runtimeInfo;
}
/**
* Starts the discovery service.
*/
@Init
public final void start() throws DiscoveryException {
onStart();
}
/**
* Stops the discovery service.
*/
@Destroy
public final void stop() throws DiscoveryException {
onStop();
}
/**
* Gets the runtime info for the runtime using the discovery service.
*
* @return Runtime info for the runtime using the discovery service.
*/
protected final RuntimeInfo getRuntimeInfo() {
return runtimeInfo;
}
/**
* Returns the request listener for the specified message type.
*
* @param messageType Message type for the incoming message.
* @return Listener interested in the message type.
*/
public final RequestListener getRequestListener(QName messageType) {
return requestListenerMap.get(messageType);
}
/**
* Returns the request listener for the specified message type.
*
* @param messageType Message type for the incoming message.
* @return Listener interested in the message type.
*/
public final ResponseListener getResponseListener(QName messageType) {
return responseListenerMap.get(messageType);
}
/**
* Broadcasts the messages to all runtimes in the domain.
*
* @param content Message content.
* @return The message id.
* @throws DiscoveryException In case of discovery errors.
*/
public int broadcastMessage(XMLStreamReader content) throws DiscoveryException {
return sendMessage(null, content);
}
/**
* Required to be overridden by sub-classes.
*
*/
protected abstract void onStart() throws DiscoveryException;
/**
* Required to be overridden by sub-classes.
*
*/
protected abstract void onStop() throws DiscoveryException;
}
|
