Commit | Line | Data |
---|---|---|
8c8bf09f ASL |
1 | /******************************************************************************* |
2 | * Copyright (c) 2009, 2010 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 | * Francois Chouinard - Initial API and implementation | |
11 | *******************************************************************************/ | |
12 | ||
13 | package org.eclipse.linuxtools.tmf.component; | |
14 | ||
8c8bf09f ASL |
15 | import java.util.Vector; |
16 | import java.util.concurrent.BlockingQueue; | |
17 | import java.util.concurrent.LinkedBlockingQueue; | |
9b635e61 | 18 | import java.util.concurrent.SynchronousQueue; |
8c8bf09f | 19 | |
ce785d7d | 20 | import org.eclipse.linuxtools.tmf.Tracer; |
8c8bf09f | 21 | import org.eclipse.linuxtools.tmf.event.TmfData; |
951d134a | 22 | import org.eclipse.linuxtools.tmf.request.ITmfDataRequest; |
9b635e61 | 23 | import org.eclipse.linuxtools.tmf.request.ITmfDataRequest.ExecutionType; |
951d134a | 24 | import org.eclipse.linuxtools.tmf.request.TmfCoalescedDataRequest; |
8c8bf09f ASL |
25 | import org.eclipse.linuxtools.tmf.request.TmfDataRequest; |
26 | import org.eclipse.linuxtools.tmf.request.TmfRequestExecutor; | |
27 | import org.eclipse.linuxtools.tmf.signal.TmfEndSynchSignal; | |
28 | import org.eclipse.linuxtools.tmf.signal.TmfSignalHandler; | |
29 | import org.eclipse.linuxtools.tmf.signal.TmfStartSynchSignal; | |
30 | import org.eclipse.linuxtools.tmf.trace.ITmfContext; | |
31 | ||
32 | /** | |
33 | * <b><u>TmfProvider</u></b> | |
34 | * <p> | |
35 | * The TmfProvider<T> is a provider for a data of type <T>. | |
36 | * <p> | |
37 | * This abstract class implements the housekeeking methods to register/ | |
38 | * deregister the event provider and to handle generically the event requests. | |
39 | * <p> | |
40 | * The concrete class can either re-implement processRequest() entirely or | |
41 | * just implement the hooks (initializeContext() and getNext()). | |
42 | * <p> | |
43 | * TODO: Add support for providing multiple data types. | |
44 | */ | |
951d134a | 45 | public abstract class TmfDataProvider<T extends TmfData> extends TmfComponent implements ITmfDataProvider<T> { |
8c8bf09f | 46 | |
550d787e FC |
47 | // ------------------------------------------------------------------------ |
48 | // Constants | |
49 | // ------------------------------------------------------------------------ | |
50 | ||
9b635e61 | 51 | // private static final ITmfDataRequest.ExecutionType SHORT = ITmfDataRequest.ExecutionType.SHORT; |
550d787e FC |
52 | // private static final ITmfDataRequest.ExecutionType LONG = ITmfDataRequest.ExecutionType.LONG; |
53 | ||
54 | // ------------------------------------------------------------------------ | |
55 | // | |
56 | // ------------------------------------------------------------------------ | |
57 | ||
8c8bf09f | 58 | final protected Class<T> fType; |
550d787e | 59 | final protected boolean fLogData; |
cb866e08 | 60 | final protected boolean fLogError; |
8c8bf09f | 61 | |
b12f4544 | 62 | public static final int DEFAULT_BLOCK_SIZE = 50000; |
8c8bf09f | 63 | public static final int DEFAULT_QUEUE_SIZE = 1000; |
f6b14ce2 | 64 | |
8c8bf09f ASL |
65 | protected final int fQueueSize; |
66 | protected final BlockingQueue<T> fDataQueue; | |
67 | protected final TmfRequestExecutor fExecutor; | |
68 | ||
550d787e | 69 | private int fSignalDepth = 0; |
045df77d | 70 | private final Object fLock = new Object(); |
951d134a | 71 | |
c1c69938 FC |
72 | private int fRequestPendingCounter = 0; |
73 | ||
8c8bf09f | 74 | // ------------------------------------------------------------------------ |
951d134a | 75 | // Constructors |
8c8bf09f ASL |
76 | // ------------------------------------------------------------------------ |
77 | ||
78 | public TmfDataProvider(String name, Class<T> type) { | |
79 | this(name, type, DEFAULT_QUEUE_SIZE); | |
80 | } | |
81 | ||
82 | protected TmfDataProvider(String name, Class<T> type, int queueSize) { | |
83 | super(name); | |
fc6ccf6f | 84 | fType = type; |
ce785d7d | 85 | fQueueSize = queueSize; |
9b635e61 | 86 | fDataQueue = (fQueueSize > 1) ? new LinkedBlockingQueue<T>(fQueueSize) : new SynchronousQueue<T>(); |
ce785d7d FC |
87 | |
88 | fExecutor = new TmfRequestExecutor(); | |
550d787e FC |
89 | fSignalDepth = 0; |
90 | ||
cb866e08 FC |
91 | fLogData = Tracer.isEventTraced(); |
92 | fLogError = Tracer.isErrorTraced(); | |
54d55ced FC |
93 | |
94 | TmfProviderManager.register(fType, this); | |
9b635e61 | 95 | // if (Tracer.isComponentTraced()) Tracer.traceComponent(this, "started"); |
ce785d7d | 96 | } |
377f1ad8 | 97 | |
ce785d7d FC |
98 | public TmfDataProvider(TmfDataProvider<T> other) { |
99 | super(other); | |
100 | fType = other.fType; | |
101 | fQueueSize = other.fQueueSize; | |
9b635e61 | 102 | fDataQueue = (fQueueSize > 1) ? new LinkedBlockingQueue<T>(fQueueSize) : new SynchronousQueue<T>(); |
ce785d7d FC |
103 | |
104 | fExecutor = new TmfRequestExecutor(); | |
550d787e FC |
105 | fSignalDepth = 0; |
106 | ||
cb866e08 FC |
107 | fLogData = Tracer.isEventTraced(); |
108 | fLogError = Tracer.isErrorTraced(); | |
377f1ad8 WB |
109 | } |
110 | ||
fc6ccf6f | 111 | @Override |
2fb2eb37 | 112 | public void dispose() { |
8c8bf09f | 113 | TmfProviderManager.deregister(fType, this); |
54d55ced | 114 | fExecutor.stop(); |
2fb2eb37 | 115 | super.dispose(); |
3d62f8b7 | 116 | // if (Tracer.isComponentTraced()) Tracer.traceComponent(this, "stopped"); |
8c8bf09f ASL |
117 | } |
118 | ||
119 | public int getQueueSize() { | |
120 | return fQueueSize; | |
121 | } | |
122 | ||
ff4ed569 FC |
123 | public Class<?> getType() { |
124 | return fType; | |
125 | } | |
126 | ||
8c8bf09f ASL |
127 | // ------------------------------------------------------------------------ |
128 | // ITmfRequestHandler | |
129 | // ------------------------------------------------------------------------ | |
130 | ||
d4011df2 | 131 | @Override |
550d787e | 132 | public void sendRequest(final ITmfDataRequest<T> request) { |
045df77d | 133 | synchronized(fLock) { |
9b635e61 FC |
134 | if (fSignalDepth > 0) { |
135 | coalesceDataRequest(request); | |
136 | } else { | |
137 | dispatchRequest(request); | |
550d787e | 138 | } |
951d134a FC |
139 | } |
140 | } | |
141 | ||
142 | /** | |
143 | * This method queues the coalesced requests. | |
144 | * | |
145 | * @param thread | |
146 | */ | |
d4011df2 | 147 | @Override |
c1c69938 | 148 | public void fireRequest() { |
045df77d | 149 | synchronized(fLock) { |
c1c69938 FC |
150 | if (fRequestPendingCounter > 0) { |
151 | return; | |
152 | } | |
153 | if (fPendingCoalescedRequests.size() > 0) { | |
154 | for (TmfDataRequest<T> request : fPendingCoalescedRequests) { | |
155 | dispatchRequest(request); | |
156 | } | |
157 | fPendingCoalescedRequests.clear(); | |
550d787e | 158 | } |
951d134a | 159 | } |
951d134a | 160 | } |
c1c69938 FC |
161 | |
162 | /** | |
163 | * Increments/decrements the pending requests counters and fires | |
164 | * the request if necessary (counter == 0). Used for coalescing | |
165 | * requests accross multiple TmfDataProvider. | |
166 | * | |
167 | * @param isIncrement | |
168 | */ | |
169 | @Override | |
170 | public void notifyPendingRequest(boolean isIncrement) { | |
171 | synchronized(fLock) { | |
172 | if (isIncrement) { | |
173 | if (fSignalDepth > 0) { | |
174 | fRequestPendingCounter++; | |
175 | } | |
176 | } else { | |
177 | if (fRequestPendingCounter > 0) { | |
178 | fRequestPendingCounter--; | |
179 | } | |
180 | ||
181 | // fire request if all pending requests are received | |
182 | if (fRequestPendingCounter == 0) { | |
183 | fireRequest(); | |
184 | } | |
185 | } | |
186 | } | |
187 | } | |
951d134a FC |
188 | |
189 | // ------------------------------------------------------------------------ | |
190 | // Coalescing (primitive test...) | |
191 | // ------------------------------------------------------------------------ | |
8c8bf09f | 192 | |
951d134a | 193 | protected Vector<TmfCoalescedDataRequest<T>> fPendingCoalescedRequests = new Vector<TmfCoalescedDataRequest<T>>(); |
8c8bf09f | 194 | |
550d787e | 195 | protected void newCoalescedDataRequest(ITmfDataRequest<T> request) { |
045df77d | 196 | synchronized(fLock) { |
f9673903 FC |
197 | TmfCoalescedDataRequest<T> coalescedRequest = new TmfCoalescedDataRequest<T>( |
198 | fType, request.getIndex(), request.getNbRequested(),request.getExecType()); | |
550d787e | 199 | coalescedRequest.addRequest(request); |
9b635e61 | 200 | if (Tracer.isRequestTraced()) { |
3b38ea61 FC |
201 | Tracer.traceRequest(request, "coalesced with " + coalescedRequest.getRequestId()); //$NON-NLS-1$ |
202 | Tracer.traceRequest(coalescedRequest, "added " + request.getRequestId()); //$NON-NLS-1$ | |
9b635e61 | 203 | } |
550d787e FC |
204 | fPendingCoalescedRequests.add(coalescedRequest); |
205 | } | |
951d134a | 206 | } |
8c8bf09f | 207 | |
045df77d FC |
208 | protected void coalesceDataRequest(ITmfDataRequest<T> request) { |
209 | synchronized(fLock) { | |
550d787e FC |
210 | for (TmfCoalescedDataRequest<T> req : fPendingCoalescedRequests) { |
211 | if (req.isCompatible(request)) { | |
212 | req.addRequest(request); | |
9b635e61 | 213 | if (Tracer.isRequestTraced()) { |
3b38ea61 FC |
214 | Tracer.traceRequest(request, "coalesced with " + req.getRequestId()); //$NON-NLS-1$ |
215 | Tracer.traceRequest(req, "added " + request.getRequestId()); //$NON-NLS-1$ | |
9b635e61 | 216 | } |
550d787e FC |
217 | return; |
218 | } | |
951d134a | 219 | } |
550d787e | 220 | newCoalescedDataRequest(request); |
8c8bf09f | 221 | } |
8c8bf09f ASL |
222 | } |
223 | ||
951d134a FC |
224 | // ------------------------------------------------------------------------ |
225 | // Request processing | |
226 | // ------------------------------------------------------------------------ | |
227 | ||
9b635e61 | 228 | private void dispatchRequest(final ITmfDataRequest<T> request) { |
f6b14ce2 | 229 | if (request.getExecType() == ExecutionType.FOREGROUND) |
9b635e61 FC |
230 | queueRequest(request); |
231 | else | |
f6b14ce2 | 232 | queueBackgroundRequest(request, DEFAULT_BLOCK_SIZE, true); |
9b635e61 FC |
233 | } |
234 | ||
2fb2eb37 | 235 | protected void queueRequest(final ITmfDataRequest<T> request) { |
9aae0442 | 236 | |
045df77d FC |
237 | if (fExecutor.isShutdown()) { |
238 | request.cancel(); | |
239 | return; | |
240 | } | |
241 | ||
f9673903 | 242 | final TmfDataProvider<T> provider = this; |
550d787e | 243 | |
8c8bf09f | 244 | // Process the request |
9b635e61 | 245 | TmfThread thread = new TmfThread(request.getExecType()) { |
8c8bf09f ASL |
246 | |
247 | @Override | |
248 | public void run() { | |
249 | ||
3b38ea61 | 250 | if (Tracer.isRequestTraced()) Tracer.traceRequest(request, "started"); //$NON-NLS-1$ |
9b635e61 | 251 | |
8c8bf09f | 252 | // Extract the generic information |
550d787e | 253 | request.start(); |
8c8bf09f | 254 | int nbRequested = request.getNbRequested(); |
8c8bf09f ASL |
255 | int nbRead = 0; |
256 | ||
257 | // Initialize the execution | |
258 | ITmfContext context = armRequest(request); | |
259 | if (context == null) { | |
550d787e | 260 | request.cancel(); |
8c8bf09f ASL |
261 | return; |
262 | } | |
263 | ||
550d787e FC |
264 | try { |
265 | // Get the ordered events | |
3b38ea61 | 266 | if (Tracer.isRequestTraced()) Tracer.trace("Request #" + request.getRequestId() + " is being serviced by " + provider.getName()); //$NON-NLS-1$//$NON-NLS-2$ |
550d787e | 267 | T data = getNext(context); |
3b38ea61 | 268 | if (Tracer.isRequestTraced()) Tracer.trace("Request #" + request.getRequestId() + " read first event"); //$NON-NLS-1$ //$NON-NLS-2$ |
550d787e FC |
269 | while (data != null && !isCompleted(request, data, nbRead)) |
270 | { | |
f9673903 FC |
271 | if (fLogData) Tracer.traceEvent(provider, request, data); |
272 | request.handleData(data); | |
273 | ||
550d787e | 274 | // To avoid an unnecessary read passed the last data requested |
f9673903 | 275 | if (++nbRead < nbRequested) { |
550d787e | 276 | data = getNext(context); |
3d62f8b7 | 277 | if (Tracer.isRequestTraced() && (data == null || data.isNullRef())) { |
3b38ea61 | 278 | Tracer.trace("Request #" + request.getRequestId() + " end of data"); //$NON-NLS-1$//$NON-NLS-2$ |
3d62f8b7 | 279 | } |
550d787e FC |
280 | } |
281 | } | |
c1c69938 FC |
282 | |
283 | if (request.isCancelled()) { | |
284 | request.cancel(); | |
285 | } | |
286 | else { | |
287 | request.done(); | |
288 | } | |
9b635e61 | 289 | |
3b38ea61 | 290 | if (Tracer.isRequestTraced()) Tracer.traceRequest(request, "completed"); //$NON-NLS-1$ |
550d787e FC |
291 | } |
292 | catch (Exception e) { | |
3b38ea61 | 293 | if (Tracer.isRequestTraced()) Tracer.traceRequest(request, "exception (failed)"); //$NON-NLS-1$ |
550d787e | 294 | request.fail(); |
8c8bf09f | 295 | } |
8c8bf09f ASL |
296 | } |
297 | }; | |
3d62f8b7 | 298 | |
5c00c0b7 | 299 | fExecutor.execute(thread); |
3d62f8b7 | 300 | |
3b38ea61 | 301 | if (Tracer.isRequestTraced()) Tracer.traceRequest(request, "queued"); //$NON-NLS-1$ |
8c8bf09f ASL |
302 | } |
303 | ||
f6b14ce2 FC |
304 | // By default, same behavior as a foreground request |
305 | protected void queueBackgroundRequest(final ITmfDataRequest<T> request, final int blockSize, boolean indexing) { | |
9b635e61 FC |
306 | queueRequest(request); |
307 | } | |
308 | ||
951d134a FC |
309 | /** |
310 | * Initialize the provider based on the request. The context is | |
311 | * provider specific and will be updated by getNext(). | |
312 | * | |
313 | * @param request | |
314 | * @return an application specific context; null if request can't be serviced | |
315 | */ | |
2fb2eb37 | 316 | public abstract ITmfContext armRequest(ITmfDataRequest<T> request); |
3d62f8b7 FC |
317 | public abstract T getNext(ITmfContext context); |
318 | ||
8c8bf09f ASL |
319 | /** |
320 | * Checks if the data meets the request completion criteria. | |
321 | * | |
322 | * @param request | |
323 | * @param data | |
324 | * @return | |
325 | */ | |
2fb2eb37 | 326 | public boolean isCompleted(ITmfDataRequest<T> request, T data, int nbRead) { |
36548af3 | 327 | return request.isCompleted() || nbRead >= request.getNbRequested() || data.isNullRef(); |
8c8bf09f ASL |
328 | } |
329 | ||
951d134a FC |
330 | // ------------------------------------------------------------------------ |
331 | // Signal handlers | |
332 | // ------------------------------------------------------------------------ | |
333 | ||
8c8bf09f | 334 | @TmfSignalHandler |
045df77d FC |
335 | public void startSynch(TmfStartSynchSignal signal) { |
336 | synchronized (fLock) { | |
337 | fSignalDepth++; | |
338 | } | |
8c8bf09f ASL |
339 | } |
340 | ||
341 | @TmfSignalHandler | |
045df77d FC |
342 | public void endSynch(TmfEndSynchSignal signal) { |
343 | synchronized (fLock) { | |
344 | fSignalDepth--; | |
345 | if (fSignalDepth == 0) { | |
c1c69938 | 346 | fireRequest(); |
045df77d FC |
347 | } |
348 | } | |
8c8bf09f ASL |
349 | } |
350 | ||
351 | } |