@Test
public void testChained() throws IOException {
ChronicleTools.deleteOnExit(TMP + "/chronicle1");
Chronicle chronicle1 = new IndexedChronicle(TMP + "/chronicle1");
InProcessChronicleSource source1 = new InProcessChronicleSource(chronicle1, 61111);
ChronicleTools.deleteOnExit(TMP + "/chronicle2");
Chronicle chronicle2 = new IndexedChronicle(TMP + "/chronicle2");
InProcessChronicleSource source2 = new InProcessChronicleSource(chronicle2, 62222);
InProcessChronicleSink sink2 = new InProcessChronicleSink(source2, "localhost", 61111);
ChronicleTools.deleteOnExit(TMP + "/chronicle3");
Chronicle chronicle3 = new IndexedChronicle(TMP + "/chronicle3");
InProcessChronicleSink sink3 = new InProcessChronicleSink(chronicle3, "localhost", 62222);
ExcerptAppender excerpt1 = source1.createAppender();
ExcerptTailer excerpt2 = sink2.createTailer();
ExcerptTailer excerpt3 = sink3.createTailer();
for (int i = 1; i < 20; i++) {
excerpt1.startExcerpt();
excerpt1.writeLong(System.nanoTime());
excerpt1.finish();
while (excerpt2.size() < i) excerpt2.nextIndex();
while (excerpt3.size() < i) excerpt3.nextIndex();
}
sink3.close();
sink2.close();
source1.close();
}
@Test
public void testChainedChronicleReconnection() throws IOException, InterruptedException {
// create the 'source' chronicle
ChronicleTools.deleteOnExit(TMP + "/chronicle1");
Chronicle chronicle = new IndexedChronicle(TMP + "/chronicle1");
InProcessChronicleSource chronicleSource = new InProcessChronicleSource(chronicle, 61111);
// write some data into the 'source' chronicle
ExcerptAppender sourceAppender = chronicleSource.createAppender();
long NUM_INITIAL_MESSAGES = 20;
for (long i = 0; i < NUM_INITIAL_MESSAGES; i++) {
sourceAppender.startExcerpt();
sourceAppender.writeLong(i);
sourceAppender.flush();
sourceAppender.finish();
}
// Starting first slave instance
// create the 'slave' chronicle
ChronicleTools.deleteOnExit(TMP + "/chronicle2");
Chronicle chronicle1 = new IndexedChronicle(TMP + "/chronicle2");
InProcessChronicleSource chronicleSource1 = new InProcessChronicleSource(chronicle1, 62222);
InProcessChronicleSink chronicleSink1 =
new InProcessChronicleSink(chronicleSource1, "localhost", 61111);
// try to read current data from the 'slave' chronicle
ExcerptTailer tailer1 = chronicleSink1.createTailer();
long nextIndex1 = 0;
while (tailer1.nextIndex()) {
assertEquals("Unexpected index in stream", tailer1.readLong(), nextIndex1++);
}
assertEquals("Unexpected number of messages in stream", NUM_INITIAL_MESSAGES, nextIndex1);
// Close first 'slave' chronicle
chronicleSink1.close();
chronicleSource1.close();
chronicle1.close();
// Write some more data
for (long i = NUM_INITIAL_MESSAGES; i < NUM_INITIAL_MESSAGES * 2; i++) {
sourceAppender.startExcerpt();
sourceAppender.writeLong(i);
sourceAppender.flush();
sourceAppender.finish();
}
// Starting second slave instance
// Observe that we don't call ChronicleTools.deleteOnExit(file) -
// the new instance will re-open the existing chronicle file
Chronicle chronicle2 = new IndexedChronicle(TMP + "/chronicle2");
InProcessChronicleSource chronicleSource2 = new InProcessChronicleSource(chronicle2, 63333);
InProcessChronicleSink chronicleSink2 =
new InProcessChronicleSink(chronicleSource2, "localhost", 61111);
ExcerptTailer tailer2 = chronicleSink2.createTailer();
long nextIndex2 = 0;
while (tailer2.nextIndex()) {
assertEquals("Unexpected message index in stream", tailer2.readLong(), nextIndex2++);
}
assertEquals("Didn't read all messages", NUM_INITIAL_MESSAGES * 2, nextIndex2);
// Cleaning up
chronicleSink2.close();
chronicleSource2.close();
chronicle2.close();
chronicleSource.close();
chronicle.close();
}