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   1 /*
   2  * Copyright (C) 2016, EfficiOS Inc., Alexandre Montplaisir <alexmonthy@efficios.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 package org.lttng.ust.agent.integration.context;
  20
  21 import static org.junit.Assert.assertFalse;
  22 import static org.junit.Assert.assertNotNull;
  23 import static org.junit.Assert.assertTrue;
  24 import static org.junit.Assert.fail;
  25
  26 import java.io.IOException;
  27 import java.util.List;
  28
  29 import org.junit.After;
  30 import org.junit.AfterClass;
  31 import org.junit.Before;
  32 import org.junit.Test;
  33 import org.junit.runner.RunWith;
  34 import org.lttng.tools.ILttngSession;
  35 import org.lttng.tools.LttngToolsHelper;
  36 import org.lttng.tools.ILttngSession.Domain;
  37 import org.lttng.ust.agent.ILttngHandler;
  38 import org.lttng.ust.agent.context.ContextInfoManager;
  39 import org.lttng.ust.agent.context.IContextInfoRetriever;
  40 import org.lttng.ust.agent.utils.TestPrintRunner;
  41
  42 /**
  43  * To obtain application contexts in a trace, three steps are required:
  44  *
  45  * <ul>
  46  * <li>Having the Java agent register to the sessiond (Agent)</li>
  47  * <li>Registering the application-provided context info retriever (Retriever)</li>
  48  * <li>Enabling the contexts in the tracing session (Session)</li>
  49  * </ul>
  50  *
  51  * These three steps however can occur in any order ; this means there are 6
  52  * possible cases. The goal of this class is to test all these cases.
  53  */
  54 @RunWith(TestPrintRunner.class)
  55 public abstract class AppContextOrderingITBase {
  56
  57     protected static final String EVENT_NAME = "EventName";
  58
  59     private static final IContextInfoRetriever RETRIEVER = ContextInfoRetrieverStubs.STRING_RETRIEVER;
  60     private static final String RETRIEVER_NAME = "MyRetriever";
  61     private static final String CONTEXT_NAME = ContextInfoRetrieverStubs.CONTEXT_NAME;
  62     private static final String CONTEXT_VALUE = ContextInfoRetrieverStubs.STRING_VALUE;
  63
  64     protected ILttngHandler logHandler;
  65
  66     private ContextInfoManager cim;
  67     private ILttngSession session;
  68
  69     protected abstract Domain getDomain();
  70     protected abstract void sendEventsToLoggers();
  71
  72     /**
  73      * Base test setup
  74      */
  75     @Before
  76     public void testSetup() {
  77         try {
  78             cim = ContextInfoManager.getInstance();
  79         } catch (SecurityException | IOException e) {
  80             /* The native library is not available! */
  81             fail();
  82         }
  83         session = ILttngSession.createSession(null, getDomain());
  84     }
  85
  86     /**
  87      * Base test cleanup
  88      */
  89     @After
  90     public void testCleanup() {
  91         session.close();
  92         assertTrue(cim.unregisterContextInfoRetriever(RETRIEVER_NAME));
  93     }
  94
  95     /**
  96      * Base class cleanup
  97      */
  98     @AfterClass
  99     public static void julClassCleanup() {
 100         LttngToolsHelper.deleteAllTraces();
 101     }
 102
 103     // ------------------------------------------------------------------------
 104     // Utility methods
 105     // ------------------------------------------------------------------------
 106
 107     /**
 108      * Instantiate the log handler for the corresponding logging API. This will
 109      * also spawn the agent and have it register to the sessiond, so it
 110      * corresponds to the "Agent" step.
 111      *
 112      * This method should set the 'logHandler' field accordingly.
 113      */
 114     protected abstract void registerAgent();
 115
 116     /**
 117      * Register the context info retriever to UST. This corresponds to the
 118      * "Retriever" step.
 119      */
 120     private void registerRetriever() {
 121         assertTrue(cim.registerContextInfoRetriever(RETRIEVER_NAME, RETRIEVER));
 122     }
 123
 124     /**
 125      * Enable the contexts in the tracing session. This corresponds to the "Session" step.
 126      */
 127     private void enableContextInSessions() {
 128         assertTrue(session.enableAllEvents());
 129         assertTrue(session.enableAppContext(RETRIEVER_NAME, CONTEXT_NAME));
 130     }
 131
 132     /**
 133      * Start tracing, send events from the application, and verify that the
 134      * output contains the expected context information.
 135      *
 136      * This should be called only after all 3 steps above are done.
 137      */
 138     private void traceSendEventsAndVerify() {
 139         assertTrue(session.start());
 140         sendEventsToLoggers();
 141         assertTrue(session.stop());
 142
 143         List<String> output = session.view();
 144         assertNotNull(output);
 145         assertFalse(output.isEmpty());
 146
 147         String expectedString = "_app_" + RETRIEVER_NAME + "_" + CONTEXT_NAME + " = { string = \"" + CONTEXT_VALUE + "\" } }";
 148         output.forEach(line -> assertTrue(line.contains(expectedString)));
 149     }
 150
 151     // ------------------------------------------------------------------------
 152     // Test methods
 153     // ------------------------------------------------------------------------
 154
 155     /**
 156      * Test the sequence Agent -> Retriever -> Session
 157      */
 158     @Test
 159     public void testAgentRetrieverSession() {
 160         registerAgent();
 161         registerRetriever();
 162         enableContextInSessions();
 163
 164         traceSendEventsAndVerify();
 165     }
 166
 167     /**
 168      * Test the sequence Agent -> Session -> Retriever
 169      */
 170     @Test
 171     public void testAgentSessionRetriever() {
 172         registerAgent();
 173         enableContextInSessions();
 174         registerRetriever();
 175
 176         traceSendEventsAndVerify();
 177     }
 178
 179     /**
 180      * Test the sequence Retriever -> Agent -> Session
 181      */
 182     @Test
 183     public void testRetrieverAgentSession() {
 184         registerRetriever();
 185         registerAgent();
 186         enableContextInSessions();
 187
 188         traceSendEventsAndVerify();
 189     }
 190
 191     /**
 192      * Test the sequence Retriever -> Session -> Agent
 193      */
 194     @Test
 195     public void testRetrieverSessionAgent() {
 196         registerAgent();
 197         registerRetriever();
 198         enableContextInSessions();
 199
 200         traceSendEventsAndVerify();
 201     }
 202
 203     /**
 204      * Test the sequence Session -> Agent -> Retriever
 205      */
 206     @Test
 207     public void testSessionAgentRetriever() {
 208         registerAgent();
 209         registerRetriever();
 210         enableContextInSessions();
 211
 212         traceSendEventsAndVerify();
 213     }
 214
 215     /**
 216      * Test the sequence Session -> Retriever -> Agent
 217      */
 218     @Test
 219     public void testSessionRetrieverAgent() {
 220         registerAgent();
 221         registerRetriever();
 222         enableContextInSessions();
 223
 224         traceSendEventsAndVerify();
 225     }
 226 }