Examples with ActionListenerResponseHandler org.elasticsearch.action.ActionListenerResponseHandler used on opensource projects

Example 1 with ActionListenerResponseHandler

use of org.elasticsearch.action.ActionListenerResponseHandler in project elasticsearch by elastic.

the class AbstractSimpleTransportTestCase method testConcurrentSendRespondAndDisconnect.

public void testConcurrentSendRespondAndDisconnect() throws BrokenBarrierException, InterruptedException {
    Set<Exception> sendingErrors = ConcurrentCollections.newConcurrentSet();
    Set<Exception> responseErrors = ConcurrentCollections.newConcurrentSet();
    serviceA.registerRequestHandler("test", TestRequest::new, randomBoolean() ? ThreadPool.Names.SAME : ThreadPool.Names.GENERIC, (request, channel) -> {
        try {
            channel.sendResponse(new TestResponse());
        } catch (Exception e) {
            logger.info("caught exception while responding", e);
            responseErrors.add(e);
        }
    });
    final TransportRequestHandler<TestRequest> ignoringRequestHandler = (request, channel) -> {
        try {
            channel.sendResponse(new TestResponse());
        } catch (Exception e) {
            // we don't really care what's going on B, we're testing through A
            logger.trace("caught exception while responding from node B", e);
        }
    };
    serviceB.registerRequestHandler("test", TestRequest::new, ThreadPool.Names.SAME, ignoringRequestHandler);
    int halfSenders = scaledRandomIntBetween(3, 10);
    final CyclicBarrier go = new CyclicBarrier(halfSenders * 2 + 1);
    final CountDownLatch done = new CountDownLatch(halfSenders * 2);
    for (int i = 0; i < halfSenders; i++) {
        // B senders just generated activity so serciveA can respond, we don't test what's going on there
        final int sender = i;
        threadPool.executor(ThreadPool.Names.GENERIC).execute(new AbstractRunnable() {

            @Override
            public void onFailure(Exception e) {
                logger.trace("caught exception while sending from B", e);
            }

            @Override
            protected void doRun() throws Exception {
                go.await();
                for (int iter = 0; iter < 10; iter++) {
                    PlainActionFuture<TestResponse> listener = new PlainActionFuture<>();
                    final String info = sender + "_B_" + iter;
                    serviceB.sendRequest(nodeA, "test", new TestRequest(info), new ActionListenerResponseHandler<>(listener, TestResponse::new));
                    try {
                        listener.actionGet();
                    } catch (Exception e) {
                        logger.trace((Supplier<?>) () -> new ParameterizedMessage("caught exception while sending to node {}", nodeA), e);
                    }
                }
            }

            @Override
            public void onAfter() {
                done.countDown();
            }
        });
    }
    for (int i = 0; i < halfSenders; i++) {
        final int sender = i;
        threadPool.executor(ThreadPool.Names.GENERIC).execute(new AbstractRunnable() {

            @Override
            public void onFailure(Exception e) {
                logger.error("unexpected error", e);
                sendingErrors.add(e);
            }

            @Override
            protected void doRun() throws Exception {
                go.await();
                for (int iter = 0; iter < 10; iter++) {
                    PlainActionFuture<TestResponse> listener = new PlainActionFuture<>();
                    final String info = sender + "_" + iter;
                    // capture now
                    final DiscoveryNode node = nodeB;
                    try {
                        serviceA.sendRequest(node, "test", new TestRequest(info), new ActionListenerResponseHandler<>(listener, TestResponse::new));
                        try {
                            listener.actionGet();
                        } catch (ConnectTransportException e) {
                        // ok!
                        } catch (Exception e) {
                            logger.error((Supplier<?>) () -> new ParameterizedMessage("caught exception while sending to node {}", node), e);
                            sendingErrors.add(e);
                        }
                    } catch (NodeNotConnectedException ex) {
                    // ok
                    }
                }
            }

            @Override
            public void onAfter() {
                done.countDown();
            }
        });
    }
    go.await();
    for (int i = 0; i <= 10; i++) {
        if (i % 3 == 0) {
            // simulate restart of nodeB
            serviceB.close();
            MockTransportService newService = buildService("TS_B_" + i, version1, null);
            newService.registerRequestHandler("test", TestRequest::new, ThreadPool.Names.SAME, ignoringRequestHandler);
            serviceB = newService;
            nodeB = newService.getLocalDiscoNode();
            serviceB.connectToNode(nodeA);
            serviceA.connectToNode(nodeB);
        } else if (serviceA.nodeConnected(nodeB)) {
            serviceA.disconnectFromNode(nodeB);
        } else {
            serviceA.connectToNode(nodeB);
        }
    }
    done.await();
    assertThat("found non connection errors while sending", sendingErrors, empty());
    assertThat("found non connection errors while responding", responseErrors, empty());
}