| 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 org.eclipse.linuxtools.tmf.Tracer; |
| 16 | import org.eclipse.linuxtools.tmf.event.TmfEvent; |
| 17 | import org.eclipse.linuxtools.tmf.event.TmfTimestamp; |
| 18 | import org.eclipse.linuxtools.tmf.request.ITmfDataRequest; |
| 19 | import org.eclipse.linuxtools.tmf.request.ITmfDataRequest.ExecutionType; |
| 20 | import org.eclipse.linuxtools.tmf.request.ITmfEventRequest; |
| 21 | import org.eclipse.linuxtools.tmf.request.TmfCoalescedEventRequest; |
| 22 | import org.eclipse.linuxtools.tmf.request.TmfEventRequest; |
| 23 | |
| 24 | /** |
| 25 | * <b><u>TmfEventProvider</u></b> |
| 26 | * <p> |
| 27 | */ |
| 28 | public abstract class TmfEventProvider<T extends TmfEvent> extends TmfDataProvider<T> { |
| 29 | |
| 30 | // ------------------------------------------------------------------------ |
| 31 | // Constructors |
| 32 | // ------------------------------------------------------------------------ |
| 33 | |
| 34 | public TmfEventProvider() { |
| 35 | super(); |
| 36 | } |
| 37 | |
| 38 | public void init(String name, Class<T> eventType) { |
| 39 | super.init(name, eventType); |
| 40 | } |
| 41 | |
| 42 | public TmfEventProvider(String name, Class<T> type) { |
| 43 | super(name, type); |
| 44 | } |
| 45 | |
| 46 | public TmfEventProvider(String name, Class<T> type, int queueSize) { |
| 47 | super(name, type, queueSize); |
| 48 | } |
| 49 | |
| 50 | public TmfEventProvider(TmfEventProvider<T> other) { |
| 51 | super(other); |
| 52 | } |
| 53 | |
| 54 | // ------------------------------------------------------------------------ |
| 55 | // TmfDataProvider |
| 56 | // ------------------------------------------------------------------------ |
| 57 | |
| 58 | @Override |
| 59 | public boolean isCompleted(ITmfDataRequest<T> request, T data, int nbRead) { |
| 60 | boolean requestCompleted = super.isCompleted(request, data, nbRead); |
| 61 | if (!requestCompleted && request instanceof ITmfEventRequest<?> && !data.isNullRef()) { |
| 62 | TmfTimestamp endTime = ((ITmfEventRequest<?>) request).getRange().getEndTime(); |
| 63 | return data.getTimestamp().compareTo(endTime, false) > 0; |
| 64 | } |
| 65 | return requestCompleted; |
| 66 | } |
| 67 | |
| 68 | @Override |
| 69 | protected synchronized void newCoalescedDataRequest(ITmfDataRequest<T> request) { |
| 70 | if (request instanceof ITmfEventRequest<?>) { |
| 71 | ITmfEventRequest<T> eventRequest = (ITmfEventRequest<T>) request; |
| 72 | TmfCoalescedEventRequest<T> coalescedRequest = new TmfCoalescedEventRequest<T>(fType, eventRequest.getRange(), |
| 73 | eventRequest.getIndex(), eventRequest.getNbRequested(), eventRequest.getBlockSize(), eventRequest.getExecType()); |
| 74 | coalescedRequest.addRequest(eventRequest); |
| 75 | if (Tracer.isRequestTraced()) { |
| 76 | Tracer.traceRequest(request, "coalesced with " + coalescedRequest.getRequestId()); //$NON-NLS-1$ |
| 77 | } |
| 78 | fPendingCoalescedRequests.add(coalescedRequest); |
| 79 | } else { |
| 80 | super.newCoalescedDataRequest(request); |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | @Override |
| 85 | protected void queueBackgroundRequest(final ITmfDataRequest<T> request, final int blockSize, final boolean indexing) { |
| 86 | |
| 87 | if (! (request instanceof ITmfEventRequest)) { |
| 88 | super.queueBackgroundRequest(request, blockSize, indexing); |
| 89 | return; |
| 90 | } |
| 91 | |
| 92 | Thread thread = new Thread() { |
| 93 | @Override |
| 94 | public void run() { |
| 95 | request.start(); |
| 96 | |
| 97 | final Integer[] CHUNK_SIZE = new Integer[1]; |
| 98 | CHUNK_SIZE[0] = Math.min(request.getNbRequested(), blockSize + ((indexing) ? 1 : 0)); |
| 99 | |
| 100 | final Integer[] nbRead = new Integer[1]; |
| 101 | nbRead[0] = 0; |
| 102 | |
| 103 | final Boolean[] isFinished = new Boolean[1]; |
| 104 | isFinished[0] = Boolean.FALSE; |
| 105 | |
| 106 | int startIndex = request.getIndex(); |
| 107 | |
| 108 | while (!isFinished[0]) { |
| 109 | |
| 110 | TmfEventRequest<T> subRequest= new TmfEventRequest<T>(request.getDataType(), ((ITmfEventRequest<?>) request).getRange(), startIndex + nbRead[0], CHUNK_SIZE[0], blockSize, ExecutionType.BACKGROUND) |
| 111 | { |
| 112 | @Override |
| 113 | public void handleData(T data) { |
| 114 | super.handleData(data); |
| 115 | request.handleData(data); |
| 116 | if (this.getNbRead() > CHUNK_SIZE[0]) { |
| 117 | System.out.println("ERROR - Read too many events"); //$NON-NLS-1$ |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | @Override |
| 122 | public void handleCompleted() { |
| 123 | nbRead[0] += this.getNbRead(); |
| 124 | if (nbRead[0] >= request.getNbRequested() || (this.getNbRead() < CHUNK_SIZE[0])) { |
| 125 | if (this.isCancelled()) { |
| 126 | request.cancel(); |
| 127 | } else if (this.isFailed()) { |
| 128 | request.fail(); |
| 129 | } else { |
| 130 | request.done(); |
| 131 | } |
| 132 | isFinished[0] = Boolean.TRUE; |
| 133 | } |
| 134 | super.handleCompleted(); |
| 135 | } |
| 136 | }; |
| 137 | |
| 138 | if (!isFinished[0]) { |
| 139 | queueRequest(subRequest); |
| 140 | |
| 141 | try { |
| 142 | subRequest.waitForCompletion(); |
| 143 | } catch (InterruptedException e) { |
| 144 | e.printStackTrace(); |
| 145 | } |
| 146 | |
| 147 | if (startIndex == 0 && nbRead[0] == CHUNK_SIZE[0]) { // do this only once if the event request index is unknown |
| 148 | startIndex = subRequest.getIndex(); // update the start index with the index of the first subrequest's |
| 149 | } // start time event which was set during the arm request |
| 150 | CHUNK_SIZE[0] = Math.min(request.getNbRequested() - nbRead[0], blockSize); |
| 151 | } |
| 152 | } |
| 153 | } |
| 154 | }; |
| 155 | |
| 156 | thread.start(); |
| 157 | } |
| 158 | } |