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1 | /******************************************************************************* |
2 | * Copyright (c) 2011 Ericsson | |
3 | * | |
4 | * All rights reserved. This program and the accompanying materials are | |
5 | * made available under the terms of the Eclipse Public License v1.0 which | |
6 | * accompanies this distribution, and is available at | |
7 | * http://www.eclipse.org/legal/epl-v10.html | |
8 | * | |
9 | * Contributors: | |
10 | * Polytechnique Montréal - Initial API and implementation (based on TCFConnectorService) | |
11 | * Bernd Hufmann - Productification, enhancements and fixes | |
12 | * | |
13 | *******************************************************************************/ | |
14 | package org.eclipse.linuxtools.lttng.ui.tracecontrol.connectorservice; | |
15 | ||
16 | import java.io.IOException; | |
17 | import java.util.ArrayList; | |
18 | import java.util.HashMap; | |
19 | import java.util.List; | |
20 | import java.util.Map; | |
21 | ||
22 | import org.eclipse.core.runtime.IProgressMonitor; | |
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23 | import org.eclipse.linuxtools.lttng.core.LttngConstants; |
24 | import org.eclipse.linuxtools.lttng.core.tracecontrol.service.ILttControllerService; | |
25 | import org.eclipse.linuxtools.lttng.core.tracecontrol.service.LttControllerServiceProxy; | |
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26 | import org.eclipse.linuxtools.lttng.ui.tracecontrol.Messages; |
27 | import org.eclipse.linuxtools.lttng.ui.tracecontrol.TraceControlConstants; | |
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28 | import org.eclipse.linuxtools.lttng.ui.tracecontrol.subsystems.TraceSubSystem; |
29 | import org.eclipse.linuxtools.lttng.ui.tracecontrol.utility.DownloadProxy; | |
30 | import org.eclipse.rse.core.model.IHost; | |
31 | import org.eclipse.rse.core.subsystems.CommunicationsEvent; | |
32 | import org.eclipse.rse.core.subsystems.ISubSystem; | |
33 | import org.eclipse.rse.ui.SystemBasePlugin; | |
34 | import org.eclipse.rse.ui.subsystems.StandardConnectorService; | |
35 | import org.eclipse.tm.tcf.core.AbstractPeer; | |
36 | import org.eclipse.tm.tcf.protocol.IChannel; | |
37 | import org.eclipse.tm.tcf.protocol.IChannel.IEventListener; | |
38 | import org.eclipse.tm.tcf.protocol.IPeer; | |
39 | import org.eclipse.tm.tcf.protocol.IService; | |
40 | import org.eclipse.tm.tcf.protocol.Protocol; | |
41 | import org.eclipse.tm.tcf.services.ILocator; | |
42 | ||
43 | /** | |
44 | * <b><u>TraceConnectorService</u></b> | |
45 | * <p> | |
46 | * Implementation of the Trace Connector class to connect to the remote agent. | |
47 | * </p> | |
48 | */ | |
49 | public class TraceConnectorService extends StandardConnectorService { | |
50 | ||
51 | // ------------------------------------------------------------------------ | |
52 | // Attributes | |
53 | // ------------------------------------------------------------------------ | |
54 | private final static int INVOCATION_TIMEOUT = 1000; | |
55 | private boolean fIsConnected = false; | |
56 | private IChannel fChannel; | |
57 | private Throwable fChannelError; | |
58 | ||
59 | private final List<Runnable> fWaitList = new ArrayList<Runnable>(); | |
60 | private boolean fPollTimerStarted; | |
61 | private DownloadProxy fDownloadProxy = null; | |
62 | ||
63 | // ------------------------------------------------------------------------ | |
64 | // Constructors | |
65 | // ------------------------------------------------------------------------ | |
66 | /** | |
67 | * Constructor for TraceConnectorService. | |
68 | * | |
69 | * @param host - host reference | |
70 | * @param port - port | |
71 | */ | |
72 | public TraceConnectorService(IHost host, int port) { | |
73 | super(Messages.Trace_Connector_Service_Name, Messages.Trace_Connector_Service_Description, host, port); | |
74 | } | |
75 | ||
76 | /* | |
77 | * (non-Javadoc) | |
78 | * @see org.eclipse.rse.core.subsystems.IConnectorService#isConnected() | |
79 | */ | |
80 | @Override | |
81 | public boolean isConnected() { | |
82 | return fIsConnected; | |
83 | } | |
84 | ||
85 | /* | |
86 | * (non-Javadoc) | |
87 | * @see org.eclipse.rse.core.subsystems.AbstractConnectorService#internalConnect(org.eclipse.core.runtime.IProgressMonitor) | |
88 | */ | |
89 | @Override | |
90 | protected void internalConnect(final IProgressMonitor monitor) throws Exception { | |
91 | assert !Protocol.isDispatchThread(); | |
92 | final Exception[] res = new Exception[1]; | |
93 | // Fire comm event to signal state about to change | |
94 | fireCommunicationsEvent(CommunicationsEvent.BEFORE_CONNECT); | |
95 | monitor.beginTask(Messages.Trace_Connector_Service_Connect_Msg + " " + getHostName(), 1); //$NON-NLS-1$ | |
96 | synchronized (res) { | |
97 | Protocol.invokeLater(new Runnable() { | |
98 | @Override | |
99 | public void run() { | |
100 | if (!connectTCFChannel(res, monitor)) { | |
101 | add_to_wait_list(this); | |
102 | } | |
103 | } | |
104 | }); | |
105 | res.wait(); | |
106 | } | |
107 | monitor.done(); | |
108 | if (res[0] != null) { | |
109 | throw res[0]; | |
110 | } | |
111 | // pretend. Normally, we'd connect to our remote server-side code here | |
112 | fIsConnected = true; | |
113 | } | |
114 | ||
115 | /* | |
116 | * (non-Javadoc) | |
117 | * @see org.eclipse.rse.core.subsystems.AbstractConnectorService#internalDisconnect(org.eclipse.core.runtime.IProgressMonitor) | |
118 | */ | |
119 | @Override | |
120 | public void internalDisconnect(final IProgressMonitor monitor) throws Exception { | |
121 | assert !Protocol.isDispatchThread(); | |
122 | final Exception[] res = new Exception[1]; | |
123 | // Fire comm event to signal state about to change | |
124 | fireCommunicationsEvent(CommunicationsEvent.BEFORE_DISCONNECT); | |
125 | monitor.beginTask(Messages.Trace_Connector_Service_Disconnect_Msg + " " + getHostName(), 1); //$NON-NLS-1$ | |
126 | synchronized (res) { | |
127 | Protocol.invokeLater(new Runnable() { | |
128 | @Override | |
129 | public void run() { | |
130 | if (!disconnectTCFChannel(res, monitor)) { | |
131 | add_to_wait_list(this); | |
132 | } | |
133 | } | |
134 | }); | |
135 | res.wait(); | |
136 | } | |
137 | monitor.done(); | |
138 | if (res[0] != null) { | |
139 | throw res[0]; | |
140 | } | |
141 | fIsConnected = false; | |
142 | } | |
143 | ||
144 | /* | |
145 | * (non-Javadoc) | |
146 | * @see org.eclipse.rse.core.subsystems.AbstractConnectorService#supportsRemoteServerLaunching() | |
147 | */ | |
148 | @Override | |
149 | public boolean supportsRemoteServerLaunching() { | |
150 | return false; | |
151 | } | |
152 | ||
153 | /* | |
154 | * (non-Javadoc) | |
155 | * @see org.eclipse.rse.core.subsystems.AbstractConnectorService#supportsServerLaunchProperties() | |
156 | */ | |
157 | @Override | |
158 | public boolean supportsServerLaunchProperties() { | |
159 | return false; | |
160 | } | |
161 | ||
162 | /* | |
163 | * Add Runnable to wait list. | |
164 | */ | |
165 | private void add_to_wait_list(Runnable cb) { | |
166 | fWaitList.add(cb); | |
167 | if (fPollTimerStarted) { | |
168 | return; | |
169 | } | |
170 | Protocol.invokeLater(INVOCATION_TIMEOUT, new Runnable() { | |
171 | @Override | |
172 | public void run() { | |
173 | fPollTimerStarted = false; | |
174 | run_wait_list(); | |
175 | } | |
176 | }); | |
177 | fPollTimerStarted = true; | |
178 | } | |
179 | ||
180 | /* | |
181 | * Run the runnables of the wait list. | |
182 | */ | |
183 | private void run_wait_list() { | |
184 | if (fWaitList.isEmpty()) { | |
185 | return; | |
186 | } | |
187 | Runnable[] runnables = fWaitList.toArray(new Runnable[fWaitList.size()]); | |
188 | fWaitList.clear(); | |
189 | for (int i = 0; i < runnables.length; i++) { | |
190 | runnables[i].run(); | |
191 | } | |
192 | } | |
193 | ||
194 | /* | |
195 | * Connect the TCF channel. | |
196 | */ | |
197 | private boolean connectTCFChannel(Exception[] res, IProgressMonitor monitor) { | |
198 | if (fChannel != null) { | |
199 | switch (fChannel.getState()) { | |
200 | case IChannel.STATE_OPEN: | |
201 | case IChannel.STATE_CLOSED: | |
202 | synchronized (res) { | |
203 | if (fChannelError instanceof Exception) { | |
204 | res[0] = (Exception) fChannelError; | |
205 | } | |
206 | else if (fChannelError != null) { | |
207 | res[0] = new Exception(fChannelError); | |
208 | } | |
209 | else { | |
210 | res[0] = null; | |
211 | } | |
212 | res.notifyAll(); | |
213 | return true; | |
214 | } | |
215 | default: | |
216 | } | |
217 | } | |
218 | if (monitor.isCanceled()) { | |
219 | synchronized (res) { | |
220 | res[0] = new Exception(Messages.Trace_Connector_Service_Canceled_Msg); | |
221 | if (fChannel != null) { | |
222 | fChannel.terminate(res[0]); | |
223 | } | |
224 | res.notifyAll(); | |
225 | return true; | |
226 | } | |
227 | } | |
228 | if (fChannel == null) { | |
229 | String host = getHostName().toLowerCase(); | |
230 | int port = getConnectPort(); | |
231 | if (port <= 0) { | |
232 | // Default fallback | |
233 | port = TraceConnectorServiceManager.TCF_PORT; | |
234 | } | |
235 | IPeer peer = null; | |
236 | String port_str = Integer.toString(port); | |
237 | ILocator locator = Protocol.getLocator(); | |
238 | for (IPeer p : locator.getPeers().values()) { | |
239 | Map<String, String> attrs = p.getAttributes(); | |
240 | if ("TCP".equals(attrs.get(IPeer.ATTR_TRANSPORT_NAME)) && //$NON-NLS-1$ | |
241 | host.equalsIgnoreCase(attrs.get(IPeer.ATTR_IP_HOST)) && port_str.equals(attrs.get(IPeer.ATTR_IP_PORT))) { | |
242 | peer = p; | |
243 | break; | |
244 | } | |
245 | } | |
246 | if (peer == null) { | |
247 | Map<String, String> attrs = new HashMap<String, String>(); | |
248 | attrs.put(IPeer.ATTR_ID, "RSE:" + host + ":" + port_str); //$NON-NLS-1$ //$NON-NLS-2$ | |
249 | attrs.put(IPeer.ATTR_NAME, getName()); | |
250 | attrs.put(IPeer.ATTR_TRANSPORT_NAME, "TCP"); //$NON-NLS-1$ | |
251 | attrs.put(IPeer.ATTR_IP_HOST, host); | |
252 | attrs.put(IPeer.ATTR_IP_PORT, port_str); | |
253 | peer = new AbstractPeer(attrs); | |
254 | } | |
255 | fChannel = peer.openChannel(); | |
256 | fChannel.addChannelListener(new IChannel.IChannelListener() { | |
257 | @Override | |
258 | public void onChannelOpened() { | |
259 | assert fChannel != null; | |
260 | ||
261 | // Check if remote server provides LTTng service | |
262 | if (fChannel.getRemoteService(ILttControllerService.NAME) == null) { | |
263 | return; | |
264 | } | |
265 | // Create service proxy, passing the fChannel to the proxy | |
266 | ILttControllerService controllerService = new LttControllerServiceProxy(fChannel); | |
267 | ||
268 | fChannel.setServiceProxy(ILttControllerService.class, controllerService); | |
269 | ||
270 | ISubSystem[] subSystems = getSubSystems(); | |
271 | ||
272 | for (int i = 0; i < subSystems.length; i++) { | |
273 | if (subSystems[i] instanceof TraceSubSystem) { | |
274 | // There is only one trace subsystem per trace connector service | |
275 | fDownloadProxy = new DownloadProxy((TraceSubSystem)subSystems[i]); | |
276 | } | |
277 | } | |
278 | ||
279 | final IEventListener listener = new IEventListener() { | |
280 | ||
281 | @Override | |
282 | public void event(String name, byte[] data) { | |
283 | if (fDownloadProxy != null) { | |
284 | if (name.compareTo(TraceControlConstants.Lttng_Control_New_Event_Data) == 0) { | |
285 | fDownloadProxy.writeDownloadedTrace(data); | |
286 | } | |
287 | else if (name.compareTo(TraceControlConstants.Lttng_Control_Unwrite_Trace_Data_Event) == 0) { | |
288 | // only for UST | |
289 | // TODO implement handling | |
290 | } | |
291 | else if (name.compareTo(TraceControlConstants.Lttng_Control_Trace_Done_Event) == 0) { | |
292 | // finished | |
293 | fDownloadProxy.handleTraceDoneEvent(data); | |
294 | } else { | |
295 | try { | |
296 | throw new IOException(LttngConstants.Lttng_Control_Command + ": " + Messages.Lttng_Control_Unknown_Event_Msg + ": " + name); //$NON-NLS-1$ //$NON-NLS-2$ | |
297 | } catch (IOException e) { | |
298 | SystemBasePlugin.logError("TraceConnectorService", e); //$NON-NLS-1$ | |
299 | } | |
300 | } | |
301 | } | |
302 | } | |
303 | }; | |
304 | fChannel.addEventListener(controllerService, listener); | |
305 | run_wait_list(); | |
306 | } | |
307 | ||
308 | @Override | |
309 | public void congestionLevel(int level) { | |
310 | } | |
311 | ||
312 | @Override | |
313 | public void onChannelClosed(Throwable error) { | |
314 | assert fChannel != null; | |
315 | fChannel.removeChannelListener(this); | |
316 | fChannelError = error; | |
317 | if (fWaitList.isEmpty()) { | |
318 | fireCommunicationsEvent(CommunicationsEvent.CONNECTION_ERROR); | |
319 | } else { | |
320 | run_wait_list(); | |
321 | } | |
322 | fChannel = null; | |
323 | fChannelError = null; | |
324 | } | |
325 | ||
326 | }); | |
327 | ||
328 | assert fChannel.getState() == IChannel.STATE_OPENING; | |
329 | } | |
330 | return false; | |
331 | } | |
332 | ||
333 | /* | |
334 | * Disconnect the TCF channel. | |
335 | */ | |
336 | private boolean disconnectTCFChannel(Exception[] res, IProgressMonitor monitor) { | |
337 | if (fChannel == null || fChannel.getState() == IChannel.STATE_CLOSED) { | |
338 | synchronized (res) { | |
339 | res[0] = null; | |
340 | res.notifyAll(); | |
341 | return true; | |
342 | } | |
343 | } | |
344 | if (monitor.isCanceled()) { | |
345 | synchronized (res) { | |
346 | res[0] = new Exception("Canceled"); //$NON-NLS-1$ | |
347 | res.notifyAll(); | |
348 | return true; | |
349 | } | |
350 | } | |
351 | if (fChannel.getState() == IChannel.STATE_OPEN) { | |
352 | fChannel.close(); | |
353 | } | |
354 | return false; | |
355 | } | |
356 | ||
357 | /** | |
358 | * Retrieve the remote service for given service interface. | |
359 | * | |
360 | * @param <V> | |
361 | * @param service_interface | |
362 | * @return Service | |
363 | * @throws Exception | |
364 | */ | |
365 | public <V extends IService> V getService(Class<V> service_interface) throws Exception { | |
366 | if (fChannel == null || fChannel.getState() != IChannel.STATE_OPEN) { | |
367 | throw new Exception(Messages.Ltt_Controller_Service_Not_Connected_Msg + ": " + service_interface.getName()); //$NON-NLS-1$ | |
368 | } | |
369 | V service = fChannel.getRemoteService(service_interface); | |
370 | if (service == null) { | |
371 | throw new Exception(Messages.Ltt_Controller_Service_Unsupported_Msg + ": " + service_interface.getName()); //$NON-NLS-1$ | |
372 | } | |
373 | return service; | |
374 | } | |
375 | ||
376 | /** | |
377 | * Retrieve the LTTng remote service. | |
378 | * | |
379 | * @return LTTng remote Service | |
380 | * @throws Exception | |
381 | */ | |
382 | public LttControllerServiceProxy getControllerService() throws Exception { | |
383 | return (LttControllerServiceProxy)getService(ILttControllerService.class); | |
384 | } | |
385 | } |