@Test
public void testDefaultTriggerWithSessionWindow() throws Exception {
ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester =
ReduceFnTester.nonCombining(
Sessions.withGapDuration(Duration.millis(10)),
DefaultTrigger.<IntervalWindow>of(),
AccumulationMode.DISCARDING_FIRED_PANES,
Duration.millis(100));
tester.injectElements(
TimestampedValue.of(1, new Instant(1)), TimestampedValue.of(2, new Instant(9)));
// no output, because we merged into the [9-19) session
tester.advanceInputWatermark(new Instant(10));
assertThat(tester.extractOutput(), Matchers.emptyIterable());
tester.injectElements(
TimestampedValue.of(3, new Instant(15)), TimestampedValue.of(4, new Instant(30)));
tester.advanceInputWatermark(new Instant(100));
assertThat(
tester.extractOutput(),
Matchers.contains(
isSingleWindowedValue(Matchers.containsInAnyOrder(1, 2, 3), 1, 1, 25),
isSingleWindowedValue(Matchers.contains(4), 30, 30, 40)));
assertFalse(tester.isMarkedFinished(new IntervalWindow(new Instant(1), new Instant(25))));
assertFalse(tester.isMarkedFinished(new IntervalWindow(new Instant(30), new Instant(40))));
tester.assertHasOnlyGlobalAndPaneInfoFor(
new IntervalWindow(new Instant(1), new Instant(25)),
new IntervalWindow(new Instant(30), new Instant(40)));
}
public static void remove(File sourceDirectoryRoot) {
Session session = sourceDirectoryRootToSessionMap.remove(sourceDirectoryRoot);
if (session == null) {
throw new RuntimeException("no such session:" + sourceDirectoryRoot.getAbsolutePath());
}
Sessions.remove(session.getSessionID());
}
/**
* Unwatches an event.
*
* @throws IOException I/O exception
*/
private void unwatch() throws IOException {
final String name = in.readString();
final Sessions s = context.events.get(name);
final boolean ok = s != null && s.contains(this);
final String message;
if (ok) {
s.remove(this);
message = UNWATCHING_EVENT_X;
} else if (s == null) {
message = EVENT_UNKNOWN_X;
} else {
message = EVENT_NOT_WATCHED_X;
}
info(Util.info(message, name), ok);
out.flush();
}
/**
* Watches an event.
*
* @throws IOException I/O exception
*/
private void watch() throws IOException {
server.initEvents();
// initialize server-based event handling
if (!events) {
out.writeString(Integer.toString(context.mprop.num(MainProp.EVENTPORT)));
out.writeString(Long.toString(getId()));
out.flush();
events = true;
}
final String name = in.readString();
final Sessions s = context.events.get(name);
final boolean ok = s != null && !s.contains(this);
final String message;
if (ok) {
s.add(this);
message = WATCHING_EVENT_X;
} else if (s == null) {
message = EVENT_UNKNOWN_X;
} else {
message = EVENT_WATCHED_X;
}
info(Util.info(message, name), ok);
}
/** Exits the session. */
public synchronized void quit() {
running = false;
if (log != null) log.write(this, "LOGOUT " + context.user.name, OK);
// wait until running command was stopped
if (command != null) {
command.stop();
while (command != null) Performance.sleep(50);
}
context.delete(this);
try {
new Close().execute(context);
socket.close();
if (events) {
esocket.close();
// remove this session from all events in pool
for (final Sessions s : context.events.values()) s.remove(this);
}
} catch (final Exception ex) {
if (log != null) log.write(ex.getMessage());
Util.stack(ex);
}
}
public static synchronized Session create(
File sourceDirectoryRoot,
NetworkPeer peer,
TaskExecutorEnv localTaskExecutorEnv,
SessionThreadManager sessionThreadManager)
throws IOException, TaskException {
Session session =
new MarkReaderSession(
sourceDirectoryRoot, peer, localTaskExecutorEnv, sessionThreadManager);
Sessions.add(session);
sourceDirectoryRootToSessionMap.put(sourceDirectoryRoot, session);
try {
Thread.sleep(1);
} catch (InterruptedException ignore) {
}
return session;
}
@Test
public void testDefaultTriggerWithContainedSessionWindow() throws Exception {
ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester =
ReduceFnTester.nonCombining(
Sessions.withGapDuration(Duration.millis(10)),
DefaultTrigger.<IntervalWindow>of(),
AccumulationMode.DISCARDING_FIRED_PANES,
Duration.millis(100));
tester.injectElements(
TimestampedValue.of(1, new Instant(1)),
TimestampedValue.of(2, new Instant(9)),
TimestampedValue.of(3, new Instant(7)));
tester.advanceInputWatermark(new Instant(20));
Iterable<WindowedValue<Iterable<Integer>>> extractOutput = tester.extractOutput();
assertThat(
extractOutput,
Matchers.contains(isSingleWindowedValue(Matchers.containsInAnyOrder(1, 2, 3), 1, 1, 19)));
tester.assertHasOnlyGlobalAndPaneInfoFor(new IntervalWindow(new Instant(1), new Instant(19)));
}
/**
* Tests that if the EOW is finished in both as well as the merged window, then it is finished in
* the merged result.
*
* <p>Because windows are discarded when a trigger finishes, we need to embed this in a sequence
* in order to check that it is re-activated. So this test is potentially sensitive to other
* triggers' correctness.
*/
@Test
public void testEarlyAndLateOnMergeAlreadyFinished() throws Exception {
tester =
TriggerTester.forTrigger(
AfterWatermark.<IntervalWindow>pastEndOfWindow()
.withEarlyFirings(AfterPane.<IntervalWindow>elementCountAtLeast(100))
.withLateFirings(AfterPane.<IntervalWindow>elementCountAtLeast(1)),
Sessions.withGapDuration(Duration.millis(10)));
tester.injectElements(1);
tester.injectElements(5);
IntervalWindow firstWindow = new IntervalWindow(new Instant(1), new Instant(11));
IntervalWindow secondWindow = new IntervalWindow(new Instant(5), new Instant(15));
IntervalWindow mergedWindow = new IntervalWindow(new Instant(1), new Instant(15));
// Finish the AfterWatermark.pastEndOfWindow() bit of the trigger in both windows
tester.advanceInputWatermark(new Instant(15));
assertTrue(tester.shouldFire(firstWindow));
assertTrue(tester.shouldFire(secondWindow));
tester.fireIfShouldFire(firstWindow);
tester.fireIfShouldFire(secondWindow);
// Confirm that we are on the late trigger by probing
assertFalse(tester.shouldFire(firstWindow));
assertFalse(tester.shouldFire(secondWindow));
tester.injectElements(1);
tester.injectElements(5);
assertTrue(tester.shouldFire(firstWindow));
assertTrue(tester.shouldFire(secondWindow));
tester.fireIfShouldFire(firstWindow);
tester.fireIfShouldFire(secondWindow);
// Merging should leave it on the late trigger
tester.mergeWindows();
// Confirm that we are on the late trigger by probing
assertFalse(tester.shouldFire(mergedWindow));
tester.injectElements(1);
assertTrue(tester.shouldFire(mergedWindow));
}
/**
* Tests that the trigger rewinds to be non-finished in the merged window.
*
* <p>Because windows are discarded when a trigger finishes, we need to embed this in a sequence
* in order to check that it is re-activated. So this test is potentially sensitive to other
* triggers' correctness.
*/
@Test
public void testOnMergeRewinds() throws Exception {
tester =
TriggerTester.forTrigger(
AfterEach.inOrder(
AfterWatermark.<IntervalWindow>pastEndOfWindow(),
Repeatedly.forever(AfterPane.<IntervalWindow>elementCountAtLeast(1))),
Sessions.withGapDuration(Duration.millis(10)));
tester.injectElements(1);
tester.injectElements(5);
IntervalWindow firstWindow = new IntervalWindow(new Instant(1), new Instant(11));
IntervalWindow secondWindow = new IntervalWindow(new Instant(5), new Instant(15));
IntervalWindow mergedWindow = new IntervalWindow(new Instant(1), new Instant(15));
// Finish the AfterWatermark.pastEndOfWindow() trigger in only the first window
tester.advanceInputWatermark(new Instant(11));
assertTrue(tester.shouldFire(firstWindow));
assertFalse(tester.shouldFire(secondWindow));
tester.fireIfShouldFire(firstWindow);
// Confirm that we are on the second trigger by probing
assertFalse(tester.shouldFire(firstWindow));
tester.injectElements(1);
assertTrue(tester.shouldFire(firstWindow));
tester.fireIfShouldFire(firstWindow);
// Merging should re-activate the watermark trigger in the merged window
tester.mergeWindows();
// Confirm that we are not on the second trigger by probing
assertFalse(tester.shouldFire(mergedWindow));
tester.injectElements(1);
assertFalse(tester.shouldFire(mergedWindow));
// And confirm that advancing the watermark fires again
tester.advanceInputWatermark(new Instant(15));
assertTrue(tester.shouldFire(mergedWindow));
}
@Test
public void testAfterPaneWithMerging() throws Exception {
Duration windowDuration = Duration.millis(10);
ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester =
ReduceFnTester.nonCombining(
Sessions.withGapDuration(windowDuration),
AfterPane.<IntervalWindow>elementCountAtLeast(2),
AccumulationMode.DISCARDING_FIRED_PANES,
Duration.millis(100));
assertThat(tester.extractOutput(), Matchers.emptyIterable());
tester.injectElements(
TimestampedValue.of(1, new Instant(1)), // in [1, 11)
TimestampedValue.of(2, new Instant(2))); // in [2, 12)
assertThat(
tester.extractOutput(),
Matchers.contains(
WindowMatchers.isSingleWindowedValue(Matchers.containsInAnyOrder(1, 2), 1, 1, 12)));
// Because we closed the previous window, we don't have it around to merge with.
tester.injectElements(
TimestampedValue.of(3, new Instant(7)), // in [7, 17)
TimestampedValue.of(4, new Instant(8))); // in [8, 18)
assertThat(
tester.extractOutput(),
Matchers.contains(
WindowMatchers.isSingleWindowedValue(Matchers.containsInAnyOrder(3, 4), 7, 7, 18)));
assertTrue(tester.isMarkedFinished(new IntervalWindow(new Instant(1), new Instant(12))));
tester.assertHasOnlyGlobalAndFinishedSetsFor(
new IntervalWindow(new Instant(1), new Instant(12)),
new IntervalWindow(new Instant(7), new Instant(18)));
}
/**
* opens an {@link ObjectContainer ObjectContainer} on the specified database file for local use.
* <br>
* <br>
* Subsidiary calls with the same database file name will return the same {@link ObjectContainer
* ObjectContainer} object.<br>
* <br>
* Every call to <code>openFile()</code> requires a corresponding {@link ObjectContainer#close
* ObjectContainer.close}.<br>
* <br>
* Database files can only be accessed for readwrite access from one process (one Java VM) at one
* time. All versions except for db4o mobile edition use an internal mechanism to lock the
* database file for other processes. <br>
* <br>
*
* @param databaseFileName the full path to the database file
* @return an open {@link ObjectContainer ObjectContainer}
* @see Configuration#readOnly
* @see Configuration#encrypt
* @see Configuration#password
*/
public static final ObjectContainer openFile(String databaseFileName)
throws DatabaseFileLockedException {
synchronized (Db4o.lock) {
return i_sessions.open(databaseFileName);
}
}
static void sessionStopped(Session a_session) {
i_sessions.remove(a_session);
}
static void forEachSession(Visitor4 visitor) {
i_sessions.forEach(visitor);
}
