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1 | /******************************************************************************* |
2 | * Copyright (c) 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.lttng.trace; | |
14 | ||
15 | import org.eclipse.linuxtools.tmf.event.TmfEvent; | |
16 | import org.eclipse.linuxtools.tmf.event.TmfTimestamp; | |
17 | import org.eclipse.linuxtools.tmf.experiment.TmfExperiment; | |
18 | import org.eclipse.linuxtools.tmf.experiment.TmfExperimentContext; | |
19 | import org.eclipse.linuxtools.tmf.experiment.TmfExperimentLocation; | |
20 | import org.eclipse.linuxtools.tmf.signal.TmfSignalManager; | |
21 | import org.eclipse.linuxtools.tmf.trace.ITmfTrace; | |
22 | import org.eclipse.linuxtools.tmf.trace.TmfContext; | |
23 | ||
24 | /** | |
25 | * <b><u>LTTngExperiment</u></b> | |
26 | * <p> | |
27 | * Temporary class to resolve a basic incompatibility between TMF and LTTng. | |
28 | * <p> | |
29 | */ | |
30 | public class LTTngExperiment<T extends TmfEvent> extends TmfExperiment<T> implements ITmfTrace { | |
31 | ||
32 | private static final int DEFAULT_INDEX_PAGE_SIZE = 5000; | |
33 | ||
34 | // ------------------------------------------------------------------------ | |
35 | // Constructors | |
36 | // ------------------------------------------------------------------------ | |
37 | ||
38 | /** | |
39 | * @param type | |
40 | * @param id | |
41 | * @param traces | |
42 | * @param epoch | |
43 | * @param indexPageSize | |
44 | */ | |
45 | public LTTngExperiment(Class<T> type, String id, ITmfTrace[] traces, TmfTimestamp epoch, int indexPageSize) { | |
46 | this(type, id, traces, TmfTimestamp.Zero, indexPageSize, false); | |
47 | } | |
48 | ||
49 | public LTTngExperiment(Class<T> type, String id, ITmfTrace[] traces, TmfTimestamp epoch, int indexPageSize, boolean preIndexExperiment) { | |
50 | super(type, id, traces, epoch, indexPageSize, preIndexExperiment); | |
51 | } | |
52 | ||
53 | /** | |
54 | * @param type | |
55 | * @param id | |
56 | * @param traces | |
57 | */ | |
58 | public LTTngExperiment(Class<T> type, String id, ITmfTrace[] traces) { | |
59 | this(type, id, traces, TmfTimestamp.Zero, DEFAULT_INDEX_PAGE_SIZE); | |
60 | } | |
61 | ||
62 | /** | |
63 | * @param type | |
64 | * @param id | |
65 | * @param traces | |
66 | * @param indexPageSize | |
67 | */ | |
68 | public LTTngExperiment(Class<T> type, String id, ITmfTrace[] traces, int indexPageSize) { | |
69 | this(type, id, traces, TmfTimestamp.Zero, indexPageSize); | |
70 | } | |
71 | ||
72 | public LTTngExperiment(LTTngExperiment<T> other) { | |
73 | super(other.getName() + "(clone)", other.fType); | |
74 | ||
75 | fEpoch = other.fEpoch; | |
76 | fIndexPageSize = other.fIndexPageSize; | |
77 | ||
78 | fTraces = new ITmfTrace[other.fTraces.length]; | |
79 | for (int trace = 0; trace < other.fTraces.length; trace++) { | |
80 | fTraces[trace] = other.fTraces[trace].createTraceCopy(); | |
81 | } | |
82 | ||
83 | fNbEvents = other.fNbEvents; | |
84 | fTimeRange = other.fTimeRange; | |
85 | } | |
86 | ||
87 | @Override | |
88 | public LTTngExperiment<T> createTraceCopy() { | |
89 | LTTngExperiment<T> experiment = new LTTngExperiment<T>(this); | |
90 | TmfSignalManager.deregister(experiment); | |
91 | return experiment; | |
92 | } | |
93 | ||
94 | // ------------------------------------------------------------------------ | |
95 | // ITmfTrace trace positioning | |
96 | // ------------------------------------------------------------------------ | |
97 | ||
98 | @Override | |
99 | public synchronized TmfEvent getNextEvent(TmfContext context) { | |
100 | ||
101 | // Validate the context | |
102 | if (!(context instanceof TmfExperimentContext)) { | |
103 | return null; // Throw an exception? | |
104 | } | |
105 | ||
f6b14ce2 | 106 | if (!context.equals(fExperimentContext)) { |
82e04272 FC |
107 | // Tracer.trace("Ctx: Restoring context"); |
108 | seekLocation(context.getLocation()); | |
109 | } | |
110 | ||
111 | TmfExperimentContext expContext = (TmfExperimentContext) context; | |
112 | ||
113 | // dumpContext(expContext, true); | |
114 | ||
115 | // If an event was consumed previously, get the next one from that trace | |
116 | int lastTrace = expContext.getLastTrace(); | |
117 | if (lastTrace != TmfExperimentContext.NO_TRACE) { | |
118 | TmfContext traceContext = expContext.getContexts()[lastTrace]; | |
119 | expContext.getEvents()[lastTrace] = expContext.getTraces()[lastTrace].getNextEvent(traceContext); | |
120 | expContext.setLastTrace(TmfExperimentContext.NO_TRACE); | |
121 | } | |
122 | ||
123 | // Scan the candidate events and identify the "next" trace to read from | |
124 | int trace = TmfExperimentContext.NO_TRACE; | |
125 | TmfTimestamp timestamp = TmfTimestamp.BigCrunch; | |
126 | for (int i = 0; i < expContext.getTraces().length; i++) { | |
127 | TmfEvent event = expContext.getEvents()[i]; | |
128 | if (event != null && event.getTimestamp() != null) { | |
129 | TmfTimestamp otherTS = event.getTimestamp(); | |
130 | if (otherTS.compareTo(timestamp, true) < 0) { | |
131 | trace = i; | |
132 | timestamp = otherTS; | |
133 | } | |
134 | } | |
135 | } | |
136 | ||
137 | // Update the experiment context and set the "next" event | |
138 | TmfEvent event = null; | |
139 | if (trace != TmfExperimentContext.NO_TRACE) { | |
140 | // updateIndex(expContext, timestamp); | |
141 | ||
142 | TmfContext traceContext = expContext.getContexts()[trace]; | |
143 | TmfExperimentLocation expLocation = (TmfExperimentLocation) expContext.getLocation(); | |
144 | expLocation.getLocation()[trace] = traceContext.getLocation().clone(); | |
145 | ||
146 | updateIndex(expContext, timestamp); | |
147 | ||
148 | expLocation.getRanks()[trace] = traceContext.getRank(); | |
149 | expContext.setLastTrace(trace); | |
150 | expContext.updateRank(1); | |
151 | event = expContext.getEvents()[trace]; | |
152 | } | |
153 | ||
154 | // if (event != null) { | |
155 | // Tracer.trace("Exp: " + (expContext.getRank() - 1) + ": " + event.getTimestamp().toString()); | |
156 | // dumpContext(expContext, false); | |
157 | // Tracer.trace("Ctx: Event returned= " + event.getTimestamp().toString()); | |
158 | // } | |
159 | ||
82e04272 FC |
160 | return event; |
161 | } | |
162 | ||
163 | /* (non-Javadoc) | |
164 | * @see java.lang.Object#toString() | |
165 | */ | |
166 | @Override | |
167 | public String toString() { | |
168 | return "[LTTngExperiment (" + getName() + ")]"; | |
169 | } | |
170 | ||
171 | } |