Examples with AlreadyExistsException org.apache.ratis.protocol.exceptions.AlreadyExistsException used on opensource projects

Example 1 with AlreadyExistsException

use of org.apache.ratis.protocol.exceptions.AlreadyExistsException in project incubator-ratis by apache.

the class RaftServerProxy method groupAddAsync.

private CompletableFuture<RaftClientReply> groupAddAsync(GroupManagementRequest request, RaftGroup newGroup) {
    if (!request.getRaftGroupId().equals(newGroup.getGroupId())) {
        return JavaUtils.completeExceptionally(new GroupMismatchException(getId() + ": Request group id (" + request.getRaftGroupId() + ") does not match the new group " + newGroup));
    }
    return impls.addNew(newGroup).thenApplyAsync(newImpl -> {
        LOG.debug("{}: newImpl = {}", getId(), newImpl);
        final boolean started = newImpl.start();
        Preconditions.assertTrue(started, () -> getId() + ": failed to start a new impl: " + newImpl);
        return newImpl.newSuccessReply(request);
    }, implExecutor).whenComplete((raftClientReply, throwable) -> {
        if (throwable != null) {
            if (!(throwable.getCause() instanceof AlreadyExistsException)) {
                impls.remove(newGroup.getGroupId());
                LOG.warn(getId() + ": Failed groupAdd* " + request, throwable);
            } else {
                if (LOG.isDebugEnabled()) {
                    LOG.debug(getId() + ": Failed groupAdd* " + request, throwable);
                }
            }
        }
    });
}

Example 2 with AlreadyExistsException

use of org.apache.ratis.protocol.exceptions.AlreadyExistsException in project incubator-ratis by apache.

the class BlockingImpl method sendRequestWithRetry.

RaftClientReply sendRequestWithRetry(Supplier<RaftClientRequest> supplier) throws IOException {
    RaftClientImpl.PendingClientRequest pending = new RaftClientImpl.PendingClientRequest() {

        @Override
        public RaftClientRequest newRequestImpl() {
            return supplier.get();
        }
    };
    while (true) {
        final RaftClientRequest request = pending.newRequest();
        IOException ioe = null;
        try {
            final RaftClientReply reply = sendRequest(request);
            if (reply != null) {
                return client.handleReply(request, reply);
            }
        } catch (GroupMismatchException | StateMachineException | TransferLeadershipException | LeaderSteppingDownException | AlreadyClosedException | AlreadyExistsException e) {
            throw e;
        } catch (IOException e) {
            ioe = e;
        }
        pending.incrementExceptionCount(ioe);
        ClientRetryEvent event = new ClientRetryEvent(request, ioe, pending);
        final RetryPolicy retryPolicy = client.getRetryPolicy();
        final RetryPolicy.Action action = retryPolicy.handleAttemptFailure(event);
        TimeDuration sleepTime = client.getEffectiveSleepTime(ioe, action.getSleepTime());
        if (!action.shouldRetry()) {
            throw (IOException) client.noMoreRetries(event);
        }
        try {
            sleepTime.sleep();
        } catch (InterruptedException e) {
            throw new InterruptedIOException("retry policy=" + retryPolicy);
        }
    }
}

Example 3 with AlreadyExistsException

use of org.apache.ratis.protocol.exceptions.AlreadyExistsException in project incubator-ratis by apache.

the class DataStreamManagement method computeDataStreamIfAbsent.

private CompletableFuture<DataStream> computeDataStreamIfAbsent(RaftClientRequest request) throws IOException {
    final Division division = server.getDivision(request.getRaftGroupId());
    final ClientInvocationId invocationId = ClientInvocationId.valueOf(request);
    final MemoizedSupplier<CompletableFuture<DataStream>> supplier = JavaUtils.memoize(() -> {
        final RequestMetrics metrics = getMetrics().newRequestMetrics(RequestType.STATE_MACHINE_STREAM);
        final RequestContext context = metrics.start();
        return division.getStateMachine().data().stream(request).whenComplete((r, e) -> metrics.stop(context, e == null));
    });
    final CompletableFuture<DataStream> f = division.getDataStreamMap().computeIfAbsent(invocationId, key -> supplier.get());
    if (!supplier.isInitialized()) {
        throw new AlreadyExistsException("A DataStream already exists for " + invocationId);
    }
    return f;
}

Example 4 with AlreadyExistsException

use of org.apache.ratis.protocol.exceptions.AlreadyExistsException in project incubator-ratis by apache.

the class GroupManagementBaseTest method testGroupAlreadyExists.

@Test
public void testGroupAlreadyExists() throws Exception {
    final MiniRaftCluster cluster = getCluster(1);
    cluster.start();
    final RaftPeer peer = cluster.getPeers().get(0);
    final RaftPeerId peerId = peer.getId();
    final RaftGroup group = RaftGroup.valueOf(cluster.getGroupId(), peer);
    try (final RaftClient client = cluster.createClient()) {
        Assert.assertEquals(group, cluster.getDivision(peerId).getGroup());
        try {
            client.getGroupManagementApi(peer.getId()).add(group);
        } catch (IOException ex) {
            // HadoopRPC throws RemoteException, which makes it hard to check if
            // the exception is instance of AlreadyExistsException
            Assert.assertTrue(ex.toString().contains(AlreadyExistsException.class.getCanonicalName()));
        }
        Assert.assertEquals(group, cluster.getDivision(peerId).getGroup());
        cluster.shutdown();
    }
}