Examples with LockResult org.neo4j.kernel.ha.lock.LockResult used on opensource projects

Example 6 with LockResult

use of org.neo4j.kernel.ha.lock.LockResult in project neo4j by neo4j.

the class MasterImplTest method lockResultMustHaveMessageWhenAcquiringSharedLockDeadlocks.

@Test
public void lockResultMustHaveMessageWhenAcquiringSharedLockDeadlocks() throws Exception {
    MasterImpl.SPI spi = mockedSpi();
    DefaultConversationSPI conversationSpi = mockedConversationSpi();
    Config config = config();
    ConversationManager conversationManager = new ConversationManager(conversationSpi, config);
    conversationManager.start();
    Client locks = mock(Client.class);
    MasterImpl master = new MasterImpl(spi, conversationManager, null, config);
    RequestContext context = createRequestContext(master);
    when(conversationSpi.acquireClient()).thenReturn(locks);
    ResourceTypes type = ResourceTypes.NODE;
    doThrow(new DeadlockDetectedException("")).when(locks).acquireExclusive(LockTracer.NONE, type, 1);
    master.acquireSharedLock(context, type, 1);
    ArgumentCaptor<LockResult> captor = ArgumentCaptor.forClass(LockResult.class);
    verify(spi).packTransactionObligationResponse(argThat(is(context)), captor.capture());
    assertThat(captor.getValue().getMessage(), is(not(nullValue())));
}

Example 7 with LockResult

use of org.neo4j.kernel.ha.lock.LockResult in project neo4j by neo4j.

the class MasterImpl method acquireExclusiveLock.

@Override
public Response<LockResult> acquireExclusiveLock(RequestContext context, ResourceType type, long... resourceIds) {
    assertCorrectEpoch(context);
    Locks.Client session;
    try {
        session = conversationManager.acquire(context).getLocks();
    } catch (NoSuchEntryException | ConcurrentAccessException e) {
        return spi.packTransactionObligationResponse(context, new LockResult(LockStatus.NOT_LOCKED, "Unable to acquire exclusive lock: " + e.getMessage()));
    }
    try {
        for (long resourceId : resourceIds) {
            session.acquireExclusive(LockTracer.NONE, type, resourceId);
        }
        return spi.packTransactionObligationResponse(context, new LockResult(LockStatus.OK_LOCKED));
    } catch (DeadlockDetectedException e) {
        return spi.packTransactionObligationResponse(context, new LockResult(LockStatus.DEAD_LOCKED, "Can't acquire exclusive lock, because it would have caused a deadlock: " + e.getMessage()));
    } catch (IllegalResourceException e) {
        return spi.packTransactionObligationResponse(context, new LockResult(LockStatus.NOT_LOCKED, "Attempted to lock illegal resource: " + e.getMessage()));
    } finally {
        conversationManager.release(context);
    }
}

Example 8 with LockResult

use of org.neo4j.kernel.ha.lock.LockResult in project neo4j by neo4j.

the class MasterImpl method acquireSharedLock.

@Override
public Response<LockResult> acquireSharedLock(RequestContext context, ResourceType type, long... resourceIds) {
    assertCorrectEpoch(context);
    Locks.Client session;
    try {
        session = conversationManager.acquire(context).getLocks();
    } catch (NoSuchEntryException | ConcurrentAccessException e) {
        return spi.packTransactionObligationResponse(context, new LockResult(LockStatus.NOT_LOCKED, "Unable to acquire shared lock: " + e.getMessage()));
    }
    try {
        for (long resourceId : resourceIds) {
            session.acquireShared(LockTracer.NONE, type, resourceId);
        }
        return spi.packTransactionObligationResponse(context, new LockResult(LockStatus.OK_LOCKED));
    } catch (DeadlockDetectedException e) {
        return spi.packTransactionObligationResponse(context, new LockResult(LockStatus.DEAD_LOCKED, e.getMessage()));
    } catch (IllegalResourceException e) {
        return spi.packTransactionObligationResponse(context, new LockResult(LockStatus.NOT_LOCKED, "Attempted to lock illegal resource: " + e.getMessage()));
    } finally {
        conversationManager.release(context);
    }
}