Examples with ReadOnlyCursor org.apache.bookkeeper.mledger.ReadOnlyCursor used on opensource projects

Example 1 with ReadOnlyCursor

use of org.apache.bookkeeper.mledger.ReadOnlyCursor in project pulsar by apache.

the class ManagedLedgerFactoryShutdownTest method openEncounteredShutdown.

@Test(timeOut = 5000)
public void openEncounteredShutdown() throws Exception {
    ManagedLedgerFactoryImpl factory = new ManagedLedgerFactoryImpl(metadataStore, bookKeeper);
    CountDownLatch callbackInvoked = new CountDownLatch(2);
    factory.asyncOpen(ledgerName, new AsyncCallbacks.OpenLedgerCallback() {

        @Override
        public void openLedgerComplete(ManagedLedger ledger, Object ctx) {
            callbackInvoked.countDown();
        }

        @Override
        public void openLedgerFailed(ManagedLedgerException exception, Object ctx) {
            callbackInvoked.countDown();
        }
    }, null);
    factory.asyncOpenReadOnlyCursor(ledgerName, PositionImpl.EARLIEST, new ManagedLedgerConfig(), new AsyncCallbacks.OpenReadOnlyCursorCallback() {

        @Override
        public void openReadOnlyCursorComplete(ReadOnlyCursor cursor, Object ctx) {
            callbackInvoked.countDown();
        }

        @Override
        public void openReadOnlyCursorFailed(ManagedLedgerException exception, Object ctx) {
            log.info("openReadOnlyCursorFailed");
            callbackInvoked.countDown();
        }
    }, null);
    log.info("Shutdown factory...");
    factory.shutdownAsync().get();
    // make zk returned after factory shutdown
    slowZk.countDown();
    // 
    Assert.assertTrue(callbackInvoked.await(5, TimeUnit.SECONDS));
    // ManagedLedgerFactoryClosedException should be thrown after factory is shutdown
    Assert.assertThrows(ManagedLedgerException.ManagedLedgerFactoryClosedException.class, () -> factory.open(ledgerName));
    Assert.assertThrows(ManagedLedgerException.ManagedLedgerFactoryClosedException.class, () -> factory.openReadOnlyCursor(ledgerName, PositionImpl.EARLIEST, new ManagedLedgerConfig()));
}

Example 2 with ReadOnlyCursor

use of org.apache.bookkeeper.mledger.ReadOnlyCursor in project pulsar by apache.

the class ReadOnlyCursorTest method simple.

@Test
void simple() throws Exception {
    ManagedLedger ledger = factory.open("simple", new ManagedLedgerConfig().setRetentionTime(1, TimeUnit.HOURS));
    int N = 10;
    for (int i = 0; i < N; i++) {
        ledger.addEntry(("entry-" + i).getBytes());
    }
    ReadOnlyCursor cursor = factory.openReadOnlyCursor("simple", PositionImpl.EARLIEST, new ManagedLedgerConfig());
    assertEquals(cursor.getNumberOfEntries(), N);
    assertTrue(cursor.hasMoreEntries());
    List<Entry> entries = cursor.readEntries(N);
    assertEquals(entries.size(), N);
    assertEquals(cursor.getNumberOfEntries(), 0);
    assertFalse(cursor.hasMoreEntries());
    entries.forEach(Entry::release);
    cursor.close();
    // Ensure we can still write to ledger
    for (int i = 0; i < N; i++) {
        ledger.addEntry(("entry-" + i).getBytes());
    }
    // Open a new cursor
    cursor = factory.openReadOnlyCursor("simple", PositionImpl.EARLIEST, new ManagedLedgerConfig());
    assertEquals(cursor.getNumberOfEntries(), 2 * N);
    assertTrue(cursor.hasMoreEntries());
    entries = cursor.readEntries(N);
    assertEquals(entries.size(), N);
    assertEquals(cursor.getNumberOfEntries(), N);
    assertTrue(cursor.hasMoreEntries());
    entries.forEach(Entry::release);
    entries = cursor.readEntries(N);
    assertEquals(entries.size(), N);
    assertEquals(cursor.getNumberOfEntries(), 0);
    assertFalse(cursor.hasMoreEntries());
    entries.forEach(Entry::release);
    cursor.close();
}

Example 3 with ReadOnlyCursor

use of org.apache.bookkeeper.mledger.ReadOnlyCursor in project pulsar by apache.

the class ReadOnlyCursorTest method empty.

@Test
void empty() throws Exception {
    factory.open("empty", new ManagedLedgerConfig().setRetentionTime(1, TimeUnit.HOURS));
    ReadOnlyCursor cursor = factory.openReadOnlyCursor("empty", PositionImpl.EARLIEST, new ManagedLedgerConfig());
    assertEquals(cursor.getNumberOfEntries(), 0);
    assertFalse(cursor.hasMoreEntries());
    cursor.close();
}

Example 4 with ReadOnlyCursor

use of org.apache.bookkeeper.mledger.ReadOnlyCursor in project pulsar by apache.

the class ReadOnlyCursorTest method skip.

@Test
void skip() throws Exception {
    ManagedLedger ledger = factory.open("skip", new ManagedLedgerConfig().setMaxEntriesPerLedger(2).setRetentionTime(1, TimeUnit.HOURS).setRetentionSizeInMB(-1));
    int N = 10;
    for (int i = 0; i < N; i++) {
        ledger.addEntry(("entry-" + i).getBytes());
    }
    ReadOnlyCursor cursor = factory.openReadOnlyCursor("skip", PositionImpl.EARLIEST, new ManagedLedgerConfig());
    assertEquals(cursor.getNumberOfEntries(), N);
    assertTrue(cursor.hasMoreEntries());
    cursor.skipEntries(5);
    assertEquals(cursor.getNumberOfEntries(), N - 5);
    assertTrue(cursor.hasMoreEntries());
    cursor.close();
}

Example 5 with ReadOnlyCursor

use of org.apache.bookkeeper.mledger.ReadOnlyCursor in project pulsar by apache.

the class ManagedLedgerFactoryImpl method openReadOnlyCursor.

@Override
public ReadOnlyCursor openReadOnlyCursor(String managedLedgerName, Position startPosition, ManagedLedgerConfig config) throws InterruptedException, ManagedLedgerException {
    class Result {

        ReadOnlyCursor c = null;

        ManagedLedgerException e = null;
    }
    final Result r = new Result();
    final CountDownLatch latch = new CountDownLatch(1);
    asyncOpenReadOnlyCursor(managedLedgerName, startPosition, config, new OpenReadOnlyCursorCallback() {

        @Override
        public void openReadOnlyCursorComplete(ReadOnlyCursor cursor, Object ctx) {
            r.c = cursor;
            latch.countDown();
        }

        @Override
        public void openReadOnlyCursorFailed(ManagedLedgerException exception, Object ctx) {
            r.e = exception;
            latch.countDown();
        }
    }, null);
    latch.await();
    if (r.e != null) {
        throw r.e;
    }
    return r.c;
}