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
|
// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.messagebus.jdisc;
import com.google.inject.Inject;
import com.yahoo.jdisc.AbstractResource;
import com.yahoo.jdisc.Request;
import com.yahoo.jdisc.ResourceReference;
import com.yahoo.jdisc.Response;
import com.yahoo.jdisc.handler.ContentChannel;
import com.yahoo.jdisc.handler.ResponseHandler;
import com.yahoo.jdisc.service.CurrentContainer;
import com.yahoo.jdisc.service.ServerProvider;
import com.yahoo.log.LogLevel;
import com.yahoo.messagebus.*;
import com.yahoo.messagebus.Error;
import com.yahoo.messagebus.shared.ServerSession;
import java.net.URI;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.logging.Logger;
/**
* @author <a href="mailto:simon@yahoo-inc.com">Simon Thoresen</a>
*/
public final class MbusServer extends AbstractResource implements ServerProvider, MessageHandler {
private final static Logger log = Logger.getLogger(MbusServer.class.getName());
private final AtomicBoolean running = new AtomicBoolean(false);
private final CurrentContainer container;
private final ServerSession session;
private final URI uri;
private final ResourceReference sessionReference;
@Inject
public MbusServer(final CurrentContainer container, final ServerSession session) {
this.container = container;
this.session = session;
uri = URI.create("mbus://localhost/" + session.name());
session.setMessageHandler(this);
sessionReference = session.refer();
}
@Override
public void start() {
log.log(LogLevel.DEBUG, "Starting message bus server.");
running.set(true);
}
@Override
public void close() {
log.log(LogLevel.DEBUG, "Closing message bus server.");
running.set(false);
}
@Override
protected void destroy() {
log.log(LogLevel.DEBUG, "Destroying message bus server.");
running.set(false);
sessionReference.close();
}
@Override
public void handleMessage(final Message msg) {
if (!running.get()) {
dispatchErrorReply(msg, ErrorCode.SESSION_BUSY, "Session temporarily closed.");
return;
}
if (msg.getTrace().shouldTrace(6)) {
msg.getTrace().trace(6, "Message received by MbusServer.");
}
Request request = null;
ContentChannel content = null;
try {
request = new MbusRequest(container, uri, msg);
content = request.connect(new ServerResponseHandler(msg));
} catch (final RuntimeException e) {
dispatchErrorReply(msg, ErrorCode.APP_FATAL_ERROR, e.toString());
} finally {
if (request != null) {
request.release();
}
}
if (content != null) {
content.close(IgnoredCompletionHandler.INSTANCE);
}
}
public String connectionSpec() {
return session.connectionSpec();
}
private void dispatchErrorReply(final Message msg, final int errCode, final String errMsg) {
final Reply reply = new EmptyReply();
reply.swapState(msg);
reply.addError(new Error(errCode, errMsg));
session.sendReply(reply);
}
private class ServerResponseHandler implements ResponseHandler {
final Message msg;
ServerResponseHandler(final Message msg) {
this.msg = msg;
}
@Override
public ContentChannel handleResponse(final Response response) {
final Reply reply;
if (response instanceof MbusResponse) {
reply = ((MbusResponse)response).getReply();
} else {
reply = new EmptyReply();
reply.swapState(msg);
}
final Error err = StatusCodes.toMbusError(response.getStatus());
if (err != null) {
if (err.isFatal()) {
if (!reply.hasFatalErrors()) {
reply.addError(err);
}
} else {
if (!reply.hasErrors()) {
reply.addError(err);
}
}
}
if (reply.getTrace().shouldTrace(6)) {
reply.getTrace().trace(6, "Sending reply from MbusServer.");
}
session.sendReply(reply);
return null;
}
}
}
|
