1 /*******************************************************************************
2 * Copyright (c) 2009, 2010 Ericsson
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
10 * Francois Chouinard - Initial API and implementation
11 *******************************************************************************/
13 package org
.eclipse
.linuxtools
.tmf
.core
.component
;
15 import org
.eclipse
.linuxtools
.tmf
.core
.Tracer
;
16 import org
.eclipse
.linuxtools
.tmf
.core
.event
.TmfEvent
;
17 import org
.eclipse
.linuxtools
.tmf
.core
.event
.TmfTimestamp
;
18 import org
.eclipse
.linuxtools
.tmf
.core
.request
.ITmfDataRequest
;
19 import org
.eclipse
.linuxtools
.tmf
.core
.request
.ITmfEventRequest
;
20 import org
.eclipse
.linuxtools
.tmf
.core
.request
.TmfCoalescedEventRequest
;
21 import org
.eclipse
.linuxtools
.tmf
.core
.request
.TmfEventRequest
;
22 import org
.eclipse
.linuxtools
.tmf
.core
.request
.ITmfDataRequest
.ExecutionType
;
25 * <b><u>TmfEventProvider</u></b>
28 public abstract class TmfEventProvider
<T
extends TmfEvent
> extends TmfDataProvider
<T
> {
30 // ------------------------------------------------------------------------
32 // ------------------------------------------------------------------------
34 public TmfEventProvider() {
38 public void init(String name
, Class
<T
> eventType
) {
39 super.init(name
, eventType
);
42 public TmfEventProvider(String name
, Class
<T
> type
) {
46 public TmfEventProvider(String name
, Class
<T
> type
, int queueSize
) {
47 super(name
, type
, queueSize
);
50 public TmfEventProvider(TmfEventProvider
<T
> other
) {
54 // ------------------------------------------------------------------------
56 // ------------------------------------------------------------------------
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;
65 return requestCompleted
;
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()); //$NON-NLS-1$
78 fPendingCoalescedRequests
.add(coalescedRequest
);
80 super.newCoalescedDataRequest(request
);
85 protected void queueBackgroundRequest(final ITmfDataRequest
<T
> request
, final int blockSize
, final boolean indexing
) {
87 if (! (request
instanceof ITmfEventRequest
)) {
88 super.queueBackgroundRequest(request
, blockSize
, indexing
);
92 Thread thread
= new Thread() {
97 final Integer
[] CHUNK_SIZE
= new Integer
[1];
98 CHUNK_SIZE
[0] = Math
.min(request
.getNbRequested(), blockSize
+ ((indexing
) ?
1 : 0));
100 final Integer
[] nbRead
= new Integer
[1];
103 final Boolean
[] isFinished
= new Boolean
[1];
104 isFinished
[0] = Boolean
.FALSE
;
106 int startIndex
= request
.getIndex();
108 while (!isFinished
[0]) {
110 TmfEventRequest
<T
> subRequest
= new TmfEventRequest
<T
>(request
.getDataType(), ((ITmfEventRequest
<?
>) request
).getRange(), startIndex
+ nbRead
[0], CHUNK_SIZE
[0], blockSize
, ExecutionType
.BACKGROUND
)
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"); //$NON-NLS-1$
122 public void handleCompleted() {
123 nbRead
[0] += this.getNbRead();
124 if (nbRead
[0] >= request
.getNbRequested() || (this.getNbRead() < CHUNK_SIZE
[0])) {
125 if (this.isCancelled()) {
127 } else if (this.isFailed()) {
132 isFinished
[0] = Boolean
.TRUE
;
134 super.handleCompleted();
138 if (!isFinished
[0]) {
139 queueRequest(subRequest
);
142 subRequest
.waitForCompletion();
143 } catch (InterruptedException e
) {
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
);