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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 | ||
15 | import java.lang.reflect.Array; | |
16 | import java.util.Vector; | |
17 | import java.util.concurrent.BlockingQueue; | |
18 | import java.util.concurrent.LinkedBlockingQueue; | |
9b635e61 | 19 | import java.util.concurrent.SynchronousQueue; |
8c8bf09f | 20 | |
ce785d7d | 21 | import org.eclipse.linuxtools.tmf.Tracer; |
8c8bf09f | 22 | import org.eclipse.linuxtools.tmf.event.TmfData; |
951d134a | 23 | import org.eclipse.linuxtools.tmf.request.ITmfDataRequest; |
9b635e61 | 24 | import org.eclipse.linuxtools.tmf.request.ITmfDataRequest.ExecutionType; |
951d134a | 25 | import org.eclipse.linuxtools.tmf.request.TmfCoalescedDataRequest; |
8c8bf09f ASL |
26 | import org.eclipse.linuxtools.tmf.request.TmfDataRequest; |
27 | import org.eclipse.linuxtools.tmf.request.TmfRequestExecutor; | |
28 | import org.eclipse.linuxtools.tmf.signal.TmfEndSynchSignal; | |
29 | import org.eclipse.linuxtools.tmf.signal.TmfSignalHandler; | |
30 | import org.eclipse.linuxtools.tmf.signal.TmfStartSynchSignal; | |
31 | import org.eclipse.linuxtools.tmf.trace.ITmfContext; | |
32 | ||
33 | /** | |
34 | * <b><u>TmfProvider</u></b> | |
35 | * <p> | |
36 | * The TmfProvider<T> is a provider for a data of type <T>. | |
37 | * <p> | |
38 | * This abstract class implements the housekeeking methods to register/ | |
39 | * deregister the event provider and to handle generically the event requests. | |
40 | * <p> | |
41 | * The concrete class can either re-implement processRequest() entirely or | |
42 | * just implement the hooks (initializeContext() and getNext()). | |
43 | * <p> | |
44 | * TODO: Add support for providing multiple data types. | |
45 | */ | |
951d134a | 46 | public abstract class TmfDataProvider<T extends TmfData> extends TmfComponent implements ITmfDataProvider<T> { |
8c8bf09f | 47 | |
550d787e FC |
48 | // ------------------------------------------------------------------------ |
49 | // Constants | |
50 | // ------------------------------------------------------------------------ | |
51 | ||
9b635e61 | 52 | // private static final ITmfDataRequest.ExecutionType SHORT = ITmfDataRequest.ExecutionType.SHORT; |
550d787e FC |
53 | // private static final ITmfDataRequest.ExecutionType LONG = ITmfDataRequest.ExecutionType.LONG; |
54 | ||
55 | // ------------------------------------------------------------------------ | |
56 | // | |
57 | // ------------------------------------------------------------------------ | |
58 | ||
8c8bf09f | 59 | final protected Class<T> fType; |
550d787e | 60 | final protected boolean fLogData; |
cb866e08 | 61 | final protected boolean fLogError; |
8c8bf09f | 62 | |
f6b14ce2 | 63 | public static final int DEFAULT_BLOCK_SIZE = 5000; |
8c8bf09f | 64 | public static final int DEFAULT_QUEUE_SIZE = 1000; |
f6b14ce2 | 65 | |
8c8bf09f ASL |
66 | protected final int fQueueSize; |
67 | protected final BlockingQueue<T> fDataQueue; | |
68 | protected final TmfRequestExecutor fExecutor; | |
69 | ||
550d787e | 70 | private int fSignalDepth = 0; |
045df77d | 71 | private final Object fLock = new Object(); |
951d134a | 72 | |
8c8bf09f | 73 | // ------------------------------------------------------------------------ |
951d134a | 74 | // Constructors |
8c8bf09f ASL |
75 | // ------------------------------------------------------------------------ |
76 | ||
77 | public TmfDataProvider(String name, Class<T> type) { | |
78 | this(name, type, DEFAULT_QUEUE_SIZE); | |
79 | } | |
80 | ||
81 | protected TmfDataProvider(String name, Class<T> type, int queueSize) { | |
82 | super(name); | |
fc6ccf6f | 83 | fType = type; |
ce785d7d | 84 | fQueueSize = queueSize; |
9b635e61 | 85 | fDataQueue = (fQueueSize > 1) ? new LinkedBlockingQueue<T>(fQueueSize) : new SynchronousQueue<T>(); |
ce785d7d FC |
86 | |
87 | fExecutor = new TmfRequestExecutor(); | |
550d787e FC |
88 | fSignalDepth = 0; |
89 | ||
cb866e08 FC |
90 | fLogData = Tracer.isEventTraced(); |
91 | fLogError = Tracer.isErrorTraced(); | |
54d55ced FC |
92 | |
93 | TmfProviderManager.register(fType, this); | |
9b635e61 | 94 | // if (Tracer.isComponentTraced()) Tracer.traceComponent(this, "started"); |
ce785d7d | 95 | } |
377f1ad8 | 96 | |
ce785d7d FC |
97 | public TmfDataProvider(TmfDataProvider<T> other) { |
98 | super(other); | |
99 | fType = other.fType; | |
100 | fQueueSize = other.fQueueSize; | |
9b635e61 | 101 | fDataQueue = (fQueueSize > 1) ? new LinkedBlockingQueue<T>(fQueueSize) : new SynchronousQueue<T>(); |
ce785d7d FC |
102 | |
103 | fExecutor = new TmfRequestExecutor(); | |
550d787e FC |
104 | fSignalDepth = 0; |
105 | ||
cb866e08 FC |
106 | fLogData = Tracer.isEventTraced(); |
107 | fLogError = Tracer.isErrorTraced(); | |
377f1ad8 WB |
108 | } |
109 | ||
fc6ccf6f | 110 | @Override |
2fb2eb37 | 111 | public void dispose() { |
8c8bf09f | 112 | TmfProviderManager.deregister(fType, this); |
54d55ced | 113 | fExecutor.stop(); |
2fb2eb37 | 114 | super.dispose(); |
3d62f8b7 | 115 | // if (Tracer.isComponentTraced()) Tracer.traceComponent(this, "stopped"); |
8c8bf09f ASL |
116 | } |
117 | ||
118 | public int getQueueSize() { | |
119 | return fQueueSize; | |
120 | } | |
121 | ||
ff4ed569 FC |
122 | public Class<?> getType() { |
123 | return fType; | |
124 | } | |
125 | ||
8c8bf09f ASL |
126 | // ------------------------------------------------------------------------ |
127 | // ITmfRequestHandler | |
128 | // ------------------------------------------------------------------------ | |
129 | ||
550d787e | 130 | public void sendRequest(final ITmfDataRequest<T> request) { |
045df77d | 131 | synchronized(fLock) { |
9b635e61 FC |
132 | if (fSignalDepth > 0) { |
133 | coalesceDataRequest(request); | |
134 | } else { | |
135 | dispatchRequest(request); | |
550d787e | 136 | } |
951d134a FC |
137 | } |
138 | } | |
139 | ||
140 | /** | |
141 | * This method queues the coalesced requests. | |
142 | * | |
143 | * @param thread | |
144 | */ | |
550d787e | 145 | public void fireRequests() { |
045df77d | 146 | synchronized(fLock) { |
550d787e | 147 | for (TmfDataRequest<T> request : fPendingCoalescedRequests) { |
9b635e61 | 148 | dispatchRequest(request); |
550d787e FC |
149 | } |
150 | fPendingCoalescedRequests.clear(); | |
951d134a | 151 | } |
951d134a FC |
152 | } |
153 | ||
154 | // ------------------------------------------------------------------------ | |
155 | // Coalescing (primitive test...) | |
156 | // ------------------------------------------------------------------------ | |
8c8bf09f | 157 | |
951d134a | 158 | protected Vector<TmfCoalescedDataRequest<T>> fPendingCoalescedRequests = new Vector<TmfCoalescedDataRequest<T>>(); |
8c8bf09f | 159 | |
550d787e | 160 | protected void newCoalescedDataRequest(ITmfDataRequest<T> request) { |
045df77d | 161 | synchronized(fLock) { |
550d787e | 162 | TmfCoalescedDataRequest<T> coalescedRequest = |
cb866e08 | 163 | new TmfCoalescedDataRequest<T>(fType, request.getIndex(), request.getNbRequested(), request.getBlockize(), request.getExecType()); |
550d787e | 164 | coalescedRequest.addRequest(request); |
9b635e61 FC |
165 | if (Tracer.isRequestTraced()) { |
166 | Tracer.traceRequest(request, "coalesced with " + coalescedRequest.getRequestId()); | |
167 | Tracer.traceRequest(coalescedRequest, "added " + request.getRequestId()); | |
168 | } | |
550d787e FC |
169 | fPendingCoalescedRequests.add(coalescedRequest); |
170 | } | |
951d134a | 171 | } |
8c8bf09f | 172 | |
045df77d FC |
173 | protected void coalesceDataRequest(ITmfDataRequest<T> request) { |
174 | synchronized(fLock) { | |
550d787e FC |
175 | for (TmfCoalescedDataRequest<T> req : fPendingCoalescedRequests) { |
176 | if (req.isCompatible(request)) { | |
177 | req.addRequest(request); | |
9b635e61 FC |
178 | if (Tracer.isRequestTraced()) { |
179 | Tracer.traceRequest(request, "coalesced with " + req.getRequestId()); | |
180 | Tracer.traceRequest(req, "added " + request.getRequestId()); | |
181 | } | |
550d787e FC |
182 | return; |
183 | } | |
951d134a | 184 | } |
550d787e | 185 | newCoalescedDataRequest(request); |
8c8bf09f | 186 | } |
8c8bf09f ASL |
187 | } |
188 | ||
951d134a FC |
189 | // ------------------------------------------------------------------------ |
190 | // Request processing | |
191 | // ------------------------------------------------------------------------ | |
192 | ||
9b635e61 | 193 | private void dispatchRequest(final ITmfDataRequest<T> request) { |
f6b14ce2 | 194 | if (request.getExecType() == ExecutionType.FOREGROUND) |
9b635e61 FC |
195 | queueRequest(request); |
196 | else | |
f6b14ce2 | 197 | queueBackgroundRequest(request, DEFAULT_BLOCK_SIZE, true); |
9b635e61 FC |
198 | } |
199 | ||
2fb2eb37 | 200 | protected void queueRequest(final ITmfDataRequest<T> request) { |
9aae0442 | 201 | |
045df77d FC |
202 | if (fExecutor.isShutdown()) { |
203 | request.cancel(); | |
204 | return; | |
205 | } | |
206 | ||
f6b14ce2 | 207 | // final TmfDataProvider<T> provider = this; |
550d787e | 208 | |
8c8bf09f | 209 | // Process the request |
9b635e61 | 210 | TmfThread thread = new TmfThread(request.getExecType()) { |
8c8bf09f ASL |
211 | |
212 | @Override | |
213 | public void run() { | |
214 | ||
f6b14ce2 | 215 | // if (Tracer.isRequestTraced()) Tracer.traceRequest(request, "started"); |
9b635e61 | 216 | |
8c8bf09f | 217 | // Extract the generic information |
550d787e | 218 | request.start(); |
8c8bf09f ASL |
219 | int blockSize = request.getBlockize(); |
220 | int nbRequested = request.getNbRequested(); | |
221 | ||
222 | // Create the result buffer | |
223 | Vector<T> result = new Vector<T>(); | |
224 | int nbRead = 0; | |
225 | ||
226 | // Initialize the execution | |
227 | ITmfContext context = armRequest(request); | |
228 | if (context == null) { | |
550d787e | 229 | request.cancel(); |
8c8bf09f ASL |
230 | return; |
231 | } | |
232 | ||
550d787e FC |
233 | try { |
234 | // Get the ordered events | |
f6b14ce2 | 235 | // if (Tracer.isRequestTraced()) Tracer.trace("Request #" + request.getRequestId() + " is being serviced by " + provider.getName()); |
550d787e | 236 | T data = getNext(context); |
f6b14ce2 | 237 | // if (Tracer.isRequestTraced()) Tracer.trace("Request #" + request.getRequestId() + " read first event"); |
550d787e FC |
238 | while (data != null && !isCompleted(request, data, nbRead)) |
239 | { | |
f6b14ce2 | 240 | // if (fLogData) Tracer.traceEvent(provider, request, data); |
550d787e FC |
241 | result.add(data); |
242 | if (++nbRead % blockSize == 0) { | |
243 | pushData(request, result); | |
ce785d7d | 244 | } |
550d787e FC |
245 | // To avoid an unnecessary read passed the last data requested |
246 | if (nbRead < nbRequested) { | |
247 | data = getNext(context); | |
3d62f8b7 FC |
248 | if (Tracer.isRequestTraced() && (data == null || data.isNullRef())) { |
249 | Tracer.trace("Request #" + request.getRequestId() + " end of data"); | |
250 | } | |
550d787e FC |
251 | } |
252 | } | |
253 | if (result.size() > 0) { | |
254 | pushData(request, result); | |
7f407ead | 255 | } |
550d787e | 256 | request.done(); |
9b635e61 | 257 | |
3d62f8b7 | 258 | if (Tracer.isRequestTraced()) Tracer.traceRequest(request, "completed"); |
550d787e FC |
259 | } |
260 | catch (Exception e) { | |
9b635e61 | 261 | if (Tracer.isRequestTraced()) Tracer.traceRequest(request, "exception (failed)"); |
550d787e | 262 | request.fail(); |
cb866e08 | 263 | // e.printStackTrace(); |
8c8bf09f | 264 | } |
8c8bf09f ASL |
265 | } |
266 | }; | |
3d62f8b7 | 267 | |
5c00c0b7 | 268 | fExecutor.execute(thread); |
3d62f8b7 | 269 | |
550d787e | 270 | if (Tracer.isRequestTraced()) Tracer.traceRequest(request, "queued"); |
8c8bf09f ASL |
271 | } |
272 | ||
f6b14ce2 FC |
273 | // By default, same behavior as a foreground request |
274 | protected void queueBackgroundRequest(final ITmfDataRequest<T> request, final int blockSize, boolean indexing) { | |
9b635e61 FC |
275 | queueRequest(request); |
276 | } | |
277 | ||
8c8bf09f ASL |
278 | /** |
279 | * Format the result data and forwards it to the requester. | |
280 | * Note: after handling, the data is *removed*. | |
281 | * | |
282 | * @param request | |
283 | * @param data | |
284 | */ | |
285 | @SuppressWarnings("unchecked") | |
951d134a | 286 | protected void pushData(ITmfDataRequest<T> request, Vector<T> data) { |
8c8bf09f ASL |
287 | synchronized(request) { |
288 | if (!request.isCompleted()) { | |
289 | T[] result = (T[]) Array.newInstance(fType, data.size()); | |
290 | data.toArray(result); | |
291 | request.setData(result); | |
292 | request.handleData(); | |
293 | data.removeAllElements(); | |
294 | } | |
295 | } | |
296 | } | |
297 | ||
951d134a FC |
298 | /** |
299 | * Initialize the provider based on the request. The context is | |
300 | * provider specific and will be updated by getNext(). | |
301 | * | |
302 | * @param request | |
303 | * @return an application specific context; null if request can't be serviced | |
304 | */ | |
2fb2eb37 | 305 | public abstract ITmfContext armRequest(ITmfDataRequest<T> request); |
3d62f8b7 FC |
306 | public abstract T getNext(ITmfContext context); |
307 | ||
308 | // public abstract void queueResult(T data); | |
309 | ||
8c8bf09f ASL |
310 | /** |
311 | * Return the next piece of data based on the context supplied. The context | |
312 | * would typically be updated for the subsequent read. | |
313 | * | |
314 | * @param context | |
315 | * @return | |
316 | */ | |
3d62f8b7 FC |
317 | // private static final int TIMEOUT = 10000; |
318 | //// public abstract T getNext(ITmfContext context) throws InterruptedException; | |
319 | //// private int getLevel = 0; | |
320 | // public T getNext(ITmfContext context) throws InterruptedException { | |
321 | //// String name = Thread.currentThread().getName(); getLevel++; | |
322 | //// System.out.println("[" + System.currentTimeMillis() + "] " + name + " " + (getLevel) + " getNext() - entering"); | |
323 | // T data = fDataQueue.poll(TIMEOUT, TimeUnit.MILLISECONDS); | |
324 | // if (data == null) { | |
325 | //// if (Tracer.isErrorTraced()) Tracer.traceError(getName() + ": Request timeout on read"); | |
326 | // throw new InterruptedException(); | |
327 | // } | |
328 | //// System.out.println("[" + System.currentTimeMillis() + "] " + name + " " + (getLevel) + " getNext() - leaving"); | |
329 | //// getLevel--; | |
330 | // return data; | |
331 | // } | |
332 | // | |
333 | // /** | |
334 | // * Makes the generated result data available for getNext() | |
335 | // * | |
336 | // * @param data | |
337 | // */ | |
338 | //// public abstract void queueResult(T data) throws InterruptedException; | |
339 | //// private int putLevel = 0; | |
340 | // public void queueResult(T data) throws InterruptedException { | |
341 | //// String name = Thread.currentThread().getName(); putLevel++; | |
342 | //// System.out.println("[" + System.currentTimeMillis() + "] " + name + " " + (putLevel) + " queueResult() - entering"); | |
343 | // boolean ok = fDataQueue.offer(data, TIMEOUT, TimeUnit.MILLISECONDS); | |
344 | // if (!ok) { | |
345 | //// if (Tracer.isErrorTraced()) Tracer.traceError(getName() + ": Request timeout on write"); | |
346 | // throw new InterruptedException(); | |
347 | // } | |
348 | //// System.out.println("[" + System.currentTimeMillis() + "] " + name + " " + (putLevel) + " queueResult() - leaving"); | |
349 | //// putLevel--; | |
350 | // } | |
8c8bf09f ASL |
351 | |
352 | /** | |
353 | * Checks if the data meets the request completion criteria. | |
354 | * | |
355 | * @param request | |
356 | * @param data | |
357 | * @return | |
358 | */ | |
2fb2eb37 | 359 | public boolean isCompleted(ITmfDataRequest<T> request, T data, int nbRead) { |
36548af3 | 360 | return request.isCompleted() || nbRead >= request.getNbRequested() || data.isNullRef(); |
8c8bf09f ASL |
361 | } |
362 | ||
951d134a FC |
363 | // ------------------------------------------------------------------------ |
364 | // Signal handlers | |
365 | // ------------------------------------------------------------------------ | |
366 | ||
8c8bf09f | 367 | @TmfSignalHandler |
045df77d FC |
368 | public void startSynch(TmfStartSynchSignal signal) { |
369 | synchronized (fLock) { | |
370 | fSignalDepth++; | |
371 | } | |
8c8bf09f ASL |
372 | } |
373 | ||
374 | @TmfSignalHandler | |
045df77d FC |
375 | public void endSynch(TmfEndSynchSignal signal) { |
376 | synchronized (fLock) { | |
377 | fSignalDepth--; | |
378 | if (fSignalDepth == 0) { | |
379 | fireRequests(); | |
380 | } | |
381 | } | |
8c8bf09f ASL |
382 | } |
383 | ||
384 | } |