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1 | /******************************************************************************* |
2 | * Copyright (c) 2012 Ericsson | |
9b749023 | 3 | * |
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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 | |
9b749023 | 8 | * |
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9 | * Contributors: |
10 | * Francois Chouinard - Initial API and implementation | |
11 | *******************************************************************************/ | |
12 | ||
13 | package org.eclipse.linuxtools.tmf.core.trace; | |
14 | ||
15 | import org.eclipse.linuxtools.tmf.core.event.ITmfEvent; | |
16 | import org.eclipse.linuxtools.tmf.core.event.ITmfTimestamp; | |
9e0640dc | 17 | import org.eclipse.linuxtools.tmf.core.event.TmfTimeRange; |
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18 | |
19 | /** | |
9e0640dc | 20 | * The generic trace indexer in TMF with support for incremental indexing. |
9b749023 | 21 | * |
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22 | * @param <T> The trace event type |
23 | * | |
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24 | * @version 1.0 |
25 | * @author Francois Chouinard | |
26 | * | |
27 | * @see ITmfTrace | |
28 | * @see ITmfEvent | |
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29 | */ |
30 | public interface ITmfTraceIndexer<T extends ITmfTrace<ITmfEvent>> { | |
31 | ||
32 | /** | |
33 | * Start an asynchronous index building job and waits for the job completion | |
34 | * if required. Typically, the indexing job sends notifications at regular | |
35 | * intervals to indicate its progress. | |
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36 | * <p> |
37 | * <b>Example 1</b>: Index a whole trace asynchronously | |
063f0d27 | 38 | * |
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39 | * <pre> |
40 | * trace.getIndexer().buildIndex(0, TmfTimeRange.ETERNITY, false); | |
41 | * </pre> | |
063f0d27 | 42 | * |
9e0640dc | 43 | * <b>Example 2</b>: Index a whole trace synchronously |
063f0d27 | 44 | * |
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45 | * <pre> |
46 | * trace.getIndexer().buildIndex(0, TmfTimeRange.ETERNITY, true); | |
47 | * </pre> | |
063f0d27 | 48 | * |
9e0640dc | 49 | * <b>Example 3</b>: Index a trace asynchronously, starting at rank 100 |
063f0d27 | 50 | * |
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51 | * <pre> |
52 | * trace.getIndexer().buildIndex(100, TmfTimeRange.ETERNITY, false); | |
53 | * </pre> | |
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54 | * |
55 | * <b>Example 4</b>: Index a trace asynchronously, starting at rank 100 for | |
56 | * events between T1 and T2 (inclusive). This is used for incremental | |
57 | * indexing. | |
58 | * | |
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59 | * <pre> |
60 | * TmfTimeRange range = new TmfTimeRange(T1, T2); | |
61 | * trace.getIndexer().buildIndex(100, range, false); | |
62 | * </pre> | |
9b749023 | 63 | * |
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64 | * @param offset |
65 | * The offset of the first event to consider | |
66 | * @param range | |
67 | * The time range to consider | |
20658947 | 68 | * @param waitForCompletion |
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69 | * Should we block the calling thread until the build is |
70 | * complete? | |
20658947 | 71 | */ |
9e0640dc | 72 | public void buildIndex(long offset, TmfTimeRange range, boolean waitForCompletion); |
9b749023 | 73 | |
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74 | /** |
75 | * Indicates that the indexer is busy indexing the trace. | |
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76 | * Will always return false if the indexing is done synchronously. |
77 | * | |
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78 | * @return the state of the indexer (indexing or not) |
79 | */ | |
80 | public boolean isIndexing(); | |
9b749023 | 81 | |
20658947 | 82 | /** |
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83 | * Adds an entry to the trace index. |
84 | * | |
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85 | * @param context The trace context to save |
86 | * @param timestamp The timestamp matching this context | |
20658947 | 87 | */ |
d337369a | 88 | public void updateIndex(ITmfContext context, ITmfTimestamp timestamp); |
9b749023 | 89 | |
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90 | /** |
91 | * Returns the context of the checkpoint immediately preceding the requested | |
92 | * timestamp (or at the timestamp if it coincides with a checkpoint). | |
9b749023 | 93 | * |
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94 | * @param timestamp the requested timestamp |
95 | * @return the checkpoint context | |
96 | */ | |
97 | public ITmfContext seekIndex(ITmfTimestamp timestamp); | |
98 | ||
99 | /** | |
100 | * Returns the context of the checkpoint immediately preceding the requested | |
101 | * rank (or at rank if it coincides with a checkpoint). | |
9b749023 | 102 | * |
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103 | * @param rank the requested event rank |
104 | * @return the checkpoint context | |
105 | */ | |
106 | public ITmfContext seekIndex(long rank); | |
107 | ||
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108 | /** |
109 | * Perform cleanup when the indexer is no longer required. | |
110 | */ | |
111 | public void dispose(); | |
112 | ||
20658947 | 113 | } |