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   1 /*
   2  * Copyright (C) 2015, 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.filter;
  20
  21 import static org.junit.Assert.assertEquals;
  22
  23 import java.io.IOException;
  24 import java.util.Collections;
  25 import java.util.HashSet;
  26 import java.util.Set;
  27 import java.util.stream.Collectors;
  28 import java.util.stream.Stream;
  29
  30 import org.junit.After;
  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.ust.agent.ILttngHandler;
  36 import org.lttng.ust.agent.filter.FilterChangeNotifier;
  37 import org.lttng.ust.agent.filter.IFilterChangeListener;
  38 import org.lttng.ust.agent.session.EventRule;
  39 import org.lttng.ust.agent.session.LogLevelSelector;
  40 import org.lttng.ust.agent.session.LogLevelSelector.LogLevelType;
  41 import org.lttng.ust.agent.utils.EventRuleFactory;
  42 import org.lttng.ust.agent.utils.ILogLevelStrings;
  43 import org.lttng.ust.agent.utils.TestPrintRunner;
  44
  45 /**
  46  * Base test class for {@link IFilterChangeListener} tests.
  47  *
  48  * @author Alexandre Montplaisir
  49  */
  50 @RunWith(TestPrintRunner.class)
  51 public abstract class FilterListenerITBase {
  52
  53     private static final String EVENT_NAME_A = "eventA";
  54     private static final String EVENT_NAME_B = "eventB";
  55     private static final String EVENT_NAME_C = "eventC";
  56
  57     private ILttngSession session;
  58     private TestFilterListener listener;
  59     private ILttngHandler handler;
  60
  61     protected abstract ILttngSession.Domain getSessionDomain();
  62     protected abstract ILttngHandler getLogHandler() throws SecurityException, IOException;
  63     protected abstract ILogLevelStrings getLogLevelStrings();
  64
  65     /**
  66      * Test setup
  67      *
  68      * @throws SecurityException
  69      * @throws IOException
  70      */
  71     @Before
  72     public void setup() throws SecurityException, IOException {
  73         handler = getLogHandler();
  74         listener = new TestFilterListener();
  75         FilterChangeNotifier.getInstance().registerListener(listener);
  76         session = ILttngSession.createSession(null, getSessionDomain());
  77     }
  78
  79     /**
  80      * Test teardown
  81      */
  82     @After
  83     public void teardown() {
  84         session.close();
  85         FilterChangeNotifier.getInstance().unregisterListener(listener);
  86         handler.close();
  87     }
  88
  89     /**
  90      * Test not sending any commands.
  91      */
  92     @Test
  93     public void testNoRules() {
  94         assertEquals(0, listener.getNbNotifications());
  95         assertEquals(Collections.EMPTY_SET, listener.getCurrentRules());
  96     }
  97
  98     /**
  99      * Test sending one event rule.
 100      */
 101     @Test
 102     public void testOneRule() {
 103         Set<EventRule> rules = Collections.singleton(
 104                 EventRuleFactory.createRule(EVENT_NAME_A));
 105
 106         session.enableEvent(EVENT_NAME_A, null, false, null);
 107
 108         assertEquals(1, listener.getNbNotifications());
 109         assertEquals(rules, listener.getCurrentRules());
 110     }
 111
 112     /**
 113      * Test sending many event rules.
 114      */
 115     @Test
 116     public void testManyRules() {
 117         Set<EventRule> rules = Stream.of(
 118                     EventRuleFactory.createRule(EVENT_NAME_A),
 119                     EventRuleFactory.createRule(EVENT_NAME_B),
 120                     EventRuleFactory.createRule(EVENT_NAME_C))
 121                 .collect(Collectors.toSet());
 122
 123         session.enableEvent(EVENT_NAME_A, null, false, null);
 124         session.enableEvent(EVENT_NAME_B, null, false, null);
 125         session.enableEvent(EVENT_NAME_C, null, false, null);
 126
 127         assertEquals(3, listener.getNbNotifications());
 128         assertEquals(rules, listener.getCurrentRules());
 129     }
 130
 131     /**
 132      * Test enabling then disabling some events.
 133      */
 134     @Test
 135     public void testManyRulesDisableSome() {
 136         Set<EventRule> rules = Collections.singleton(
 137                 EventRuleFactory.createRule(EVENT_NAME_A));
 138
 139         session.enableEvent(EVENT_NAME_A, null, false, null);
 140         session.enableEvent(EVENT_NAME_B, null, false, null);
 141         session.enableEvent(EVENT_NAME_C, null, false, null);
 142         session.disableEvents(EVENT_NAME_B);
 143         session.disableEvents(EVENT_NAME_C);
 144
 145         assertEquals(5, listener.getNbNotifications());
 146         assertEquals(rules, listener.getCurrentRules());
 147     }
 148
 149     /**
 150      * Test enabling some rules, then calling disable-event -a.
 151      */
 152     @Test
 153     public void testManyRulesDisableAll() {
 154         Set<EventRule> rules = Collections.EMPTY_SET;
 155
 156         session.enableEvent(EVENT_NAME_A, null, false, null);
 157         session.enableEvent(EVENT_NAME_B, null, false, null);
 158         session.enableEvent(EVENT_NAME_C, null, false, null);
 159         session.disableAllEvents();
 160
 161         /*
 162          * We should receive 6 notifications, because a "disable-event -a" sends
 163          * one for each event that was enabled.
 164          */
 165         assertEquals(6, listener.getNbNotifications());
 166         assertEquals(rules, listener.getCurrentRules());
 167     }
 168
 169     /**
 170      * Test enabling the same event name with various values of loglevels.
 171      */
 172     @Test
 173     public void testSameEventsDiffLogLevels() {
 174         LogLevelSelector lls1 = new LogLevelSelector(getLogLevelStrings().warningInt(), LogLevelType.LTTNG_EVENT_LOGLEVEL_RANGE);
 175         LogLevelSelector lls2 = new LogLevelSelector(getLogLevelStrings().warningInt(), LogLevelType.LTTNG_EVENT_LOGLEVEL_SINGLE);
 176         LogLevelSelector lls3 = new LogLevelSelector(getLogLevelStrings().infoInt(), LogLevelType.LTTNG_EVENT_LOGLEVEL_RANGE);
 177
 178         Set<EventRule> rules = Stream.of(
 179                     EventRuleFactory.createRule(EVENT_NAME_A, lls1),
 180                     EventRuleFactory.createRule(EVENT_NAME_A, lls2),
 181                     EventRuleFactory.createRule(EVENT_NAME_A, lls3))
 182                 .collect(Collectors.toSet());
 183
 184         session.enableEvent(EVENT_NAME_A, getLogLevelStrings().warningName(), false, null);
 185         session.enableEvent(EVENT_NAME_A, getLogLevelStrings().warningName(), true, null);
 186         session.enableEvent(EVENT_NAME_A, getLogLevelStrings().infoName(), false, null);
 187
 188         assertEquals(3, listener.getNbNotifications());
 189         assertEquals(rules, listener.getCurrentRules());
 190     }
 191
 192     /**
 193      * Test enabling the same event name with various filters.
 194      */
 195     @Test
 196     public void testSameEventsDiffFilters() {
 197         String filterA = "filterA";
 198         String filterB = "filterB";
 199
 200         Set<EventRule> rules = Stream.of(
 201                     EventRuleFactory.createRule(EVENT_NAME_A),
 202                     EventRuleFactory.createRule(EVENT_NAME_B, EventRuleFactory.LOG_LEVEL_UNSPECIFIED, filterA),
 203                     EventRuleFactory.createRule(EVENT_NAME_C, EventRuleFactory.LOG_LEVEL_UNSPECIFIED, filterB))
 204                 .collect(Collectors.toSet());
 205
 206         session.enableEvent(EVENT_NAME_A, null, false, null);
 207         session.enableEvent(EVENT_NAME_B, null, false, filterA);
 208         session.enableEvent(EVENT_NAME_C, null, false, filterB);
 209
 210         assertEquals(3, listener.getNbNotifications());
 211         assertEquals(rules, listener.getCurrentRules());
 212     }
 213
 214     /**
 215      * Test sending some notifications then detaching a listener. Subsequent
 216      * notifications should not be sent.
 217      */
 218     @Test
 219     public void testDetachingListener() {
 220         Set<EventRule> rules = Stream.of(
 221                         EventRuleFactory.createRule(EVENT_NAME_A),
 222                         EventRuleFactory.createRule(EVENT_NAME_B))
 223                 .collect(Collectors.toSet());
 224
 225         session.enableEvent(EVENT_NAME_A, null, false, null);
 226         session.enableEvent(EVENT_NAME_B, null, false, null);
 227         FilterChangeNotifier.getInstance().unregisterListener(listener);
 228         session.enableEvent(EVENT_NAME_C, null, false, null);
 229
 230         assertEquals(2, listener.getNbNotifications());
 231         assertEquals(rules, listener.getCurrentRules());
 232     }
 233
 234     /**
 235      * Run a test with multiple listeners attached to the manager. All listeners
 236      * should receive all the data.
 237      */
 238     @Test
 239     public void testMultipleListeners() {
 240         FilterChangeNotifier fcn = FilterChangeNotifier.getInstance();
 241         TestFilterListener listener2 = new TestFilterListener();
 242         TestFilterListener listener3 = new TestFilterListener();
 243         fcn.registerListener(listener2);
 244         fcn.registerListener(listener3);
 245
 246         Set<EventRule> rules = Stream.of(
 247                 EventRuleFactory.createRule(EVENT_NAME_A),
 248                 EventRuleFactory.createRule(EVENT_NAME_B))
 249             .collect(Collectors.toSet());
 250
 251         session.enableEvent(EVENT_NAME_A, null, false, null);
 252         session.enableEvent(EVENT_NAME_B, null, false, null);
 253         session.enableEvent(EVENT_NAME_C, null, false, null);
 254         session.disableEvents(EVENT_NAME_C);
 255
 256         assertEquals(4, listener.getNbNotifications());
 257         assertEquals(rules, listener.getCurrentRules());
 258
 259         assertEquals(4, listener2.getNbNotifications());
 260         assertEquals(rules, listener2.getCurrentRules());
 261
 262         assertEquals(4, listener3.getNbNotifications());
 263         assertEquals(rules, listener3.getCurrentRules());
 264
 265         fcn.unregisterListener(listener2);
 266         fcn.unregisterListener(listener3);
 267     }
 268
 269     /**
 270      * Test with both attached and unattached listeners. The unattached ones
 271      * should not receive anything, but should not interfere with the other
 272      * ones.
 273      */
 274     @Test
 275     public void testUnattachedListeners() {
 276         FilterChangeNotifier fcn = FilterChangeNotifier.getInstance();
 277         TestFilterListener listener2 = new TestFilterListener();
 278         TestFilterListener listener3 = new TestFilterListener();
 279         /* We attach then detach listener2. We never attach listener3 */
 280         fcn.registerListener(listener2);
 281         fcn.unregisterListener(listener2);
 282
 283         Set<EventRule> rules = Stream.of(
 284                 EventRuleFactory.createRule(EVENT_NAME_A),
 285                 EventRuleFactory.createRule(EVENT_NAME_B))
 286             .collect(Collectors.toSet());
 287
 288         session.enableEvent(EVENT_NAME_A, null, false, null);
 289         session.enableEvent(EVENT_NAME_B, null, false, null);
 290
 291         assertEquals(2, listener.getNbNotifications());
 292         assertEquals(rules, listener.getCurrentRules());
 293
 294         assertEquals(0, listener2.getNbNotifications());
 295         assertEquals(Collections.EMPTY_SET, listener2.getCurrentRules());
 296
 297         assertEquals(0, listener3.getNbNotifications());
 298         assertEquals(Collections.EMPTY_SET, listener3.getCurrentRules());
 299     }
 300
 301     /**
 302      * Test that a newly-registered listener correctly receives the "statedump",
 303      * which means all the rules currently active, upon registration.
 304      */
 305     @Test
 306     public void testStatedump() {
 307         FilterChangeNotifier fcn = FilterChangeNotifier.getInstance();
 308         TestFilterListener listener2 = new TestFilterListener();
 309
 310         Set<EventRule> rules1 = Stream.of(
 311                 EventRuleFactory.createRule(EVENT_NAME_A),
 312                 EventRuleFactory.createRule(EVENT_NAME_B))
 313             .collect(Collectors.toSet());
 314         Set<EventRule> rules2 = Stream.of(
 315                 EventRuleFactory.createRule(EVENT_NAME_A),
 316                 EventRuleFactory.createRule(EVENT_NAME_C))
 317             .collect(Collectors.toSet());
 318
 319         session.enableEvent(EVENT_NAME_A, null, false, null);
 320         session.enableEvent(EVENT_NAME_B, null, false, null);
 321         fcn.registerListener(listener2);
 322
 323         /* We should have received the "statedump" when registering */
 324         assertEquals(2, listener2.getNbNotifications());
 325         assertEquals(rules1, listener2.getCurrentRules());
 326
 327         session.enableEvent(EVENT_NAME_C, null, false, null);
 328         session.disableEvents(EVENT_NAME_B);
 329
 330         /* Subsequent changes should also be received */
 331         assertEquals(4, listener2.getNbNotifications());
 332         assertEquals(rules2, listener2.getCurrentRules());
 333
 334         fcn.unregisterListener(listener2);
 335     }
 336
 337     /**
 338      * The filter listener used for tests.
 339      */
 340     private static class TestFilterListener implements IFilterChangeListener {
 341
 342         private final Set<EventRule> currentRules = new HashSet<>();
 343         private volatile int currentNotifications = 0;
 344
 345         public TestFilterListener() {}
 346
 347         @Override
 348         public void eventRuleAdded(EventRule rule) {
 349             currentRules.add(rule);
 350             currentNotifications++;
 351         }
 352
 353         @Override
 354         public void eventRuleRemoved(EventRule rule) {
 355             currentRules.remove(rule);
 356             currentNotifications++;
 357         }
 358
 359         public int getNbNotifications() {
 360             return currentNotifications;
 361         }
 362
 363         public Set<EventRule> getCurrentRules() {
 364             return currentRules;
 365         }
 366     }
 367
 368 }