Examples with ZKDistributedLock com.twitter.distributedlog.lock.ZKDistributedLock used on opensource projects

Example 11 with ZKDistributedLock

use of com.twitter.distributedlog.lock.ZKDistributedLock in project distributedlog by twitter.

the class TestBKLogSegmentWriter method testCloseShouldFailIfLedgerFenced.

/**
     * Close the writer when ledger is fenced: it should release the lock, fail on flushing data and throw exception
     *
     * @throws Exception
     */
@Test(timeout = 60000)
public void testCloseShouldFailIfLedgerFenced() throws Exception {
    DistributedLogConfiguration confLocal = newLocalConf();
    confLocal.setImmediateFlushEnabled(false);
    confLocal.setOutputBufferSize(Integer.MAX_VALUE);
    confLocal.setPeriodicFlushFrequencyMilliSeconds(0);
    ZKDistributedLock lock = createLock("/test/lock-" + runtime.getMethodName(), zkc, true);
    BKLogSegmentWriter writer = createLogSegmentWriter(confLocal, 0L, -1L, lock);
    // Use another lock to wait for writer releasing lock
    ZKDistributedLock lock0 = createLock("/test/lock-" + runtime.getMethodName(), zkc0, false);
    Future<ZKDistributedLock> lockFuture0 = lock0.asyncAcquire();
    // add 10 records
    int numRecords = 10;
    List<Future<DLSN>> futureList = new ArrayList<Future<DLSN>>(numRecords);
    for (int i = 0; i < numRecords; i++) {
        futureList.add(writer.asyncWrite(DLMTestUtil.getLogRecordInstance(i)));
    }
    assertEquals("Last tx id should be " + (numRecords - 1), numRecords - 1, writer.getLastTxId());
    assertEquals("Last acked tx id should be -1", -1L, writer.getLastTxIdAcknowledged());
    assertEquals("Last DLSN should be " + DLSN.InvalidDLSN, DLSN.InvalidDLSN, writer.getLastDLSN());
    assertEquals("Position should be " + numRecords, 10, writer.getPositionWithinLogSegment());
    // fence the ledger
    fenceLedger(getLedgerHandle(writer));
    // close the writer: it should release the lock, fail on flushing data and throw exception
    try {
        closeWriterAndLock(writer, lock);
        fail("Close a log segment writer when ledger is fenced should throw exception");
    } catch (BKTransmitException bkte) {
        assertEquals("Inconsistent rc is thrown", BKException.Code.LedgerFencedException, bkte.getBKResultCode());
    }
    Await.result(lockFuture0);
    lock0.checkOwnership();
    assertEquals("Last tx id should still be " + (numRecords - 1), numRecords - 1, writer.getLastTxId());
    assertEquals("Last acked tx id should still be " + (numRecords - 1), -1L, writer.getLastTxIdAcknowledged());
    assertEquals("Last DLSN should still be " + DLSN.InvalidDLSN, DLSN.InvalidDLSN, writer.getLastDLSN());
    assertEquals("Position should still be " + numRecords, 10, writer.getPositionWithinLogSegment());
    for (int i = 0; i < numRecords; i++) {
        try {
            Await.result(futureList.get(i));
            fail("Should be aborted record " + i + " with transmit exception");
        } catch (BKTransmitException bkte) {
            assertEquals("Record " + i + " should be aborted", BKException.Code.LedgerFencedException, bkte.getBKResultCode());
        }
    }
    // check no entries were written
    LedgerHandle lh = getLedgerHandle(writer);
    LedgerHandle readLh = openLedgerNoRecovery(lh);
    assertTrue("Ledger " + lh.getId() + " should be closed", readLh.isClosed());
    assertEquals("There should be no entries in ledger " + lh.getId(), LedgerHandle.INVALID_ENTRY_ID, readLh.getLastAddConfirmed());
}

Example 12 with ZKDistributedLock

use of com.twitter.distributedlog.lock.ZKDistributedLock in project distributedlog by twitter.

the class TestBKLogSegmentWriter method testNondurableWriteAfterLedgerIsFenced.

/**
     * Non durable write should fail if the log segment is fenced.
     *
     * @throws Exception
     */
@Test(timeout = 60000)
public void testNondurableWriteAfterLedgerIsFenced() throws Exception {
    DistributedLogConfiguration confLocal = newLocalConf();
    confLocal.setImmediateFlushEnabled(false);
    confLocal.setOutputBufferSize(Integer.MAX_VALUE);
    confLocal.setPeriodicFlushFrequencyMilliSeconds(0);
    confLocal.setDurableWriteEnabled(false);
    ZKDistributedLock lock = createLock("/test/lock-" + runtime.getMethodName(), zkc, true);
    BKLogSegmentWriter writer = createLogSegmentWriter(confLocal, 0L, -1L, lock);
    // fence the ledger
    fenceLedger(getLedgerHandle(writer));
    LogRecord record = DLMTestUtil.getLogRecordInstance(1);
    record.setControl();
    try {
        Await.result(writer.asyncWrite(record));
        fail("Should fail the writer if the log segment is already fenced");
    } catch (BKTransmitException bkte) {
        // expected
        assertEquals(BKException.Code.LedgerFencedException, bkte.getBKResultCode());
    }
    try {
        Await.result(writer.asyncWrite(DLMTestUtil.getLogRecordInstance(2)));
        fail("Should fail the writer if the log segment is already fenced");
    } catch (WriteException we) {
    // expected
    }
    abortWriterAndLock(writer, lock);
}

Example 13 with ZKDistributedLock

use of com.twitter.distributedlog.lock.ZKDistributedLock in project distributedlog by twitter.

the class TestBKLogSegmentWriter method testCloseShouldNotFlushIfInErrorState.

/**
     * Close a log segment writer that is already in error state, should not flush buffered data.
     *
     * @throws Exception
     */
void testCloseShouldNotFlushIfInErrorState(int rcToFailComplete) throws Exception {
    DistributedLogConfiguration confLocal = newLocalConf();
    confLocal.setImmediateFlushEnabled(false);
    confLocal.setOutputBufferSize(Integer.MAX_VALUE);
    confLocal.setPeriodicFlushFrequencyMilliSeconds(0);
    ZKDistributedLock lock = createLock("/test/lock-" + runtime.getMethodName(), zkc, true);
    BKLogSegmentWriter writer = createLogSegmentWriter(confLocal, 0L, -1L, lock);
    // Use another lock to wait for writer releasing lock
    ZKDistributedLock lock0 = createLock("/test/lock-" + runtime.getMethodName(), zkc0, false);
    Future<ZKDistributedLock> lockFuture0 = lock0.asyncAcquire();
    // add 10 records
    int numRecords = 10;
    List<Future<DLSN>> futureList = new ArrayList<Future<DLSN>>(numRecords);
    for (int i = 0; i < numRecords; i++) {
        futureList.add(writer.asyncWrite(DLMTestUtil.getLogRecordInstance(i)));
    }
    assertEquals("Last tx id should be " + (numRecords - 1), numRecords - 1, writer.getLastTxId());
    assertEquals("Last acked tx id should be -1", -1L, writer.getLastTxIdAcknowledged());
    assertEquals("Last DLSN should be " + DLSN.InvalidDLSN, DLSN.InvalidDLSN, writer.getLastDLSN());
    assertEquals("Position should be " + numRecords, 10, writer.getPositionWithinLogSegment());
    writer.setTransmitResult(rcToFailComplete);
    // close the writer should release lock but not flush data
    try {
        closeWriterAndLock(writer, lock);
        fail("Close a log segment writer in error state should throw exception");
    } catch (BKTransmitException bkte) {
        assertEquals("Inconsistent rc is thrown", rcToFailComplete, bkte.getBKResultCode());
    }
    Await.result(lockFuture0);
    lock0.checkOwnership();
    assertEquals("Last tx id should still be " + (numRecords - 1), numRecords - 1, writer.getLastTxId());
    assertEquals("Last acked tx id should still be " + (numRecords - 1), -1L, writer.getLastTxIdAcknowledged());
    assertEquals("Last DLSN should still be " + DLSN.InvalidDLSN, DLSN.InvalidDLSN, writer.getLastDLSN());
    assertEquals("Position should still be " + numRecords, 10, writer.getPositionWithinLogSegment());
    for (int i = 0; i < numRecords; i++) {
        try {
            Await.result(futureList.get(i));
            fail("Should be aborted record " + i + " with transmit exception");
        } catch (WriteCancelledException wce) {
            assertTrue("Record " + i + " should be aborted because of ledger fenced", wce.getCause() instanceof BKTransmitException);
            BKTransmitException bkte = (BKTransmitException) wce.getCause();
            assertEquals("Record " + i + " should be aborted", rcToFailComplete, bkte.getBKResultCode());
        }
    }
    // check no entries were written
    LedgerHandle lh = getLedgerHandle(writer);
    LedgerHandle readLh = openLedgerNoRecovery(lh);
    assertFalse("Ledger " + lh.getId() + " should not be closed", readLh.isClosed());
    assertEquals("There should be no entries in ledger " + lh.getId(), LedgerHandle.INVALID_ENTRY_ID, readLh.getLastAddConfirmed());
}