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1 | /******************************************************************************* |
2 | * Copyright (c) 2016 EfficiOS Inc., Philippe Proulx | |
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 | ||
10 | package org.lttng.scope.lttng.kernel.core.activator.internal; | |
11 | ||
12 | import java.io.IOException; | |
13 | import java.io.InputStream; | |
14 | import java.util.Properties; | |
15 | ||
16 | import org.eclipse.tracecompass.tmf.core.analysis.ondemand.OnDemandAnalysisManager; | |
17 | import org.eclipse.tracecompass.tmf.core.trace.ITmfTrace; | |
18 | import org.lttng.scope.lami.core.module.LamiAnalysis; | |
19 | import org.lttng.scope.lami.core.module.LamiAnalysisFactoryException; | |
20 | import org.lttng.scope.lami.core.module.LamiAnalysisFactoryFromConfigFile; | |
21 | import org.lttng.scope.lttng.kernel.core.trace.LttngKernelTrace; | |
22 | import org.lttng.scope.lttng.kernel.core.trace.layout.ILttngKernelEventLayout; | |
23 | import org.lttng.scope.lttng.kernel.core.trace.layout.internal.Lttng27EventLayout; | |
24 | ||
25 | /** | |
26 | * Loader of LTTng analyses. | |
27 | * | |
28 | * @author Philippe Proulx | |
29 | */ | |
30 | final class LttngAnalysesLoader { | |
31 | ||
32 | private static final String CONFIG_DIR_NAME = "lttng-analyses-configs"; //$NON-NLS-1$ | |
33 | ||
34 | private LttngAnalysesLoader() { | |
35 | } | |
36 | ||
37 | private static boolean appliesTo(ITmfTrace trace) { | |
38 | /* LTTng-Analysis is supported only on LTTng >= 2.7 kernel traces */ | |
39 | if (trace instanceof LttngKernelTrace) { | |
40 | final LttngKernelTrace kernelTrace = (LttngKernelTrace) trace; | |
41 | final ILttngKernelEventLayout layout = kernelTrace.getKernelEventLayout(); | |
42 | ||
43 | if (layout instanceof Lttng27EventLayout) { | |
44 | return true; | |
45 | } | |
46 | } | |
47 | ||
48 | return false; | |
49 | } | |
50 | ||
51 | private static String[] getAnalysisNames() throws IOException { | |
52 | final ClassLoader loader = LttngAnalysesLoader.class.getClassLoader(); | |
53 | final String path = "/" + CONFIG_DIR_NAME + "/index.properties"; //$NON-NLS-1$ //$NON-NLS-2$ | |
54 | final String[] names = new String[0]; | |
55 | final Properties indexProps = new Properties(); | |
56 | ||
57 | try (final InputStream in = loader.getResourceAsStream(path)) { | |
58 | if (in == null) { | |
59 | return names; | |
60 | } | |
61 | ||
62 | indexProps.load(in); | |
63 | } | |
64 | ||
65 | String analyses = indexProps.getProperty("analyses"); //$NON-NLS-1$ | |
66 | ||
67 | if (analyses == null) { | |
68 | return names; | |
69 | } | |
70 | ||
71 | analyses = analyses.trim(); | |
72 | return analyses.split("\\s+"); //$NON-NLS-1$ | |
73 | } | |
74 | ||
75 | public static void load() throws LamiAnalysisFactoryException, IOException { | |
76 | final String[] names = getAnalysisNames(); | |
77 | final ClassLoader loader = LttngAnalysesLoader.class.getClassLoader(); | |
78 | ||
79 | for (final String name : names) { | |
80 | final String path = String.format("/%s/%s.properties", CONFIG_DIR_NAME, name); //$NON-NLS-1$ | |
81 | ||
82 | try (final InputStream in = loader.getResourceAsStream(path)) { | |
83 | if (in == null) { | |
84 | continue; | |
85 | } | |
86 | ||
87 | final LamiAnalysis analysis = LamiAnalysisFactoryFromConfigFile.buildFromInputStream(in, false, LttngAnalysesLoader::appliesTo); | |
88 | OnDemandAnalysisManager.getInstance().registerAnalysis(analysis); | |
89 | } | |
90 | } | |
91 | } | |
92 | ||
93 | } |