Examples of org.apache.hedwig.client.api.Client

org.apache.hedwig.client.api.Client
Interface defining the client API for Hedwig

        client.close();
    }


    @Test
    public void testLedgerGC() throws Exception {
        Client client = new HedwigClient(new MessageBoundClientConfiguration());
        Publisher pub = client.getPublisher();
        Subscriber sub = client.getSubscriber();


        String ledgersPath = "/hedwig/standalone/topics/testGCTopic/ledgers";
        ByteString topic = ByteString.copyFromUtf8("testGCTopic");
        ByteString subid = ByteString.copyFromUtf8("testGCSubId");
        sub.subscribe(topic, subid, CreateOrAttach.CREATE_OR_ATTACH);
        sub.closeSubscription(topic, subid);


        for (int i = 1; i <= 100; i++) {
            pub.publish(topic, Message.newBuilder().setBody(
                                ByteString.copyFromUtf8(String.valueOf(i))).build());
        }
        LedgerRanges r = LedgerRanges.parseFrom(bktb.getZooKeeperClient().getData(ledgersPath, false, null));
        assertEquals("Should only have 1 ledger yet", 1, r.getRangesList().size());
        long firstLedger = r.getRangesList().get(0).getLedgerId();


        stopHubServers();
        startHubServers();


        pub.publish(topic, Message.newBuilder().setBody(
                            ByteString.copyFromUtf8(String.valueOf(0xdeadbeef))).build());


        r = LedgerRanges.parseFrom(bktb.getZooKeeperClient().getData(ledgersPath, false, null));
        assertEquals("Should have 2 ledgers after restart", 2, r.getRangesList().size());


        for (int i = 100; i <= 200; i++) {
            pub.publish(topic, Message.newBuilder().setBody(
                                ByteString.copyFromUtf8(String.valueOf(i))).build());
        }
        Thread.sleep(5000); // give GC a chance to happen


        r = LedgerRanges.parseFrom(bktb.getZooKeeperClient().getData(ledgersPath, false, null));
        long secondLedger = r.getRangesList().get(0).getLedgerId();


        assertEquals("Should only have 1 ledger after GC", 1, r.getRangesList().size());


        // ensure original ledger doesn't exist
        String firstLedgerPath = String.format("/ledgers/L%010d", firstLedger);
        String secondLedgerPath = String.format("/ledgers/L%010d", secondLedger);
        assertNull("Ledger should not exist", bktb.getZooKeeperClient().exists(firstLedgerPath, false));
        assertNotNull("Ledger should exist", bktb.getZooKeeperClient().exists(secondLedgerPath, false));


        client.close();
    }

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        sub.closeSubscription(topic, subid);
    }


    @Test(timeout=60000)
    public void testBasicBounding() throws Exception {
        Client client = new HedwigClient(new MessageBoundClientConfiguration(5));
        Publisher pub = client.getPublisher();
        Subscriber sub = client.getSubscriber();


        ByteString topic = ByteString.copyFromUtf8("basicBoundingTopic");
        ByteString subid = ByteString.copyFromUtf8("basicBoundingSubId");
        sub.subscribe(topic, subid, CreateOrAttach.CREATE);
        sub.closeSubscription(topic, subid);


        sendXExpectLastY(pub, sub, topic, subid, 1000, 5);


        client.close();
    }

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    @Test(timeout=60000)
    public void testMultipleSubscribers() throws Exception {
        ByteString topic = ByteString.copyFromUtf8("multiSubTopic");


        Client client = new HedwigClient(new HubClientConfiguration());
        Publisher pub = client.getPublisher();
        Subscriber sub = client.getSubscriber();


        SubscriptionOptions options5 = SubscriptionOptions.newBuilder()
            .setCreateOrAttach(CreateOrAttach.CREATE).setMessageBound(5).build();
        SubscriptionOptions options20 = SubscriptionOptions.newBuilder()
            .setCreateOrAttach(CreateOrAttach.CREATE).setMessageBound(20).build();
        SubscriptionOptions optionsUnbounded = SubscriptionOptions.newBuilder()
            .setCreateOrAttach(CreateOrAttach.CREATE).build();


        ByteString subid5 = ByteString.copyFromUtf8("bound5SubId");
        ByteString subid20 = ByteString.copyFromUtf8("bound20SubId");
        ByteString subidUnbounded = ByteString.copyFromUtf8("noboundSubId");


        sub.subscribe(topic, subid5, options5);
        sub.closeSubscription(topic, subid5);
        sendXExpectLastY(pub, sub, topic, subid5, 1000, 5);


        sub.subscribe(topic, subid20, options20);
        sub.closeSubscription(topic, subid20);
        sendXExpectLastY(pub, sub, topic, subid20, 1000, 20);


        sub.subscribe(topic, subidUnbounded, optionsUnbounded);
        sub.closeSubscription(topic, subidUnbounded);


        sendXExpectLastY(pub, sub, topic, subidUnbounded, 10000, 10000);
        sub.unsubscribe(topic, subidUnbounded);


        sendXExpectLastY(pub, sub, topic, subid20, 1000, 20);
        sub.unsubscribe(topic, subid20);


        sendXExpectLastY(pub, sub, topic, subid5, 1000, 5);
        sub.unsubscribe(topic, subid5);


        client.close();
    }

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    @Test(timeout=60000)
    public void testUpdateMessageBound() throws Exception {
        ByteString topic = ByteString.copyFromUtf8("UpdateMessageBound");


        Client client = new HedwigClient(new HubClientConfiguration());
        Publisher pub = client.getPublisher();
        Subscriber sub = client.getSubscriber();


        SubscriptionOptions options5 = SubscriptionOptions.newBuilder()
            .setCreateOrAttach(CreateOrAttach.CREATE_OR_ATTACH).setMessageBound(5).build();
        SubscriptionOptions options20 = SubscriptionOptions.newBuilder()
            .setCreateOrAttach(CreateOrAttach.CREATE_OR_ATTACH).setMessageBound(20).build();
        SubscriptionOptions options10 = SubscriptionOptions.newBuilder()
            .setCreateOrAttach(CreateOrAttach.CREATE_OR_ATTACH).setMessageBound(10).build();


        ByteString subid = ByteString.copyFromUtf8("updateSubId");


        sub.subscribe(topic, subid, options5);
        sub.closeSubscription(topic, subid);
        sendXExpectLastY(pub, sub, topic, subid, 50, 5);


        // update bound to 20
        sub.subscribe(topic, subid, options20);
        sub.closeSubscription(topic, subid);
        sendXExpectLastY(pub, sub, topic, subid, 50, 20);


        // update bound to 10
        sub.subscribe(topic, subid, options10);
        sub.closeSubscription(topic, subid);
        sendXExpectLastY(pub, sub, topic, subid, 50, 10);


        // message bound is not provided, no update
        sub.subscribe(topic, subid, CreateOrAttach.CREATE_OR_ATTACH);
        sub.closeSubscription(topic, subid);
        sendXExpectLastY(pub, sub, topic, subid, 50, 10);


        client.close();
    }

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        client.close();
    }


    @Test(timeout=60000)
    public void testLedgerGC() throws Exception {
        Client client = new HedwigClient(new MessageBoundClientConfiguration());
        Publisher pub = client.getPublisher();
        Subscriber sub = client.getSubscriber();


        String ledgersPath = "/hedwig/standalone/topics/testGCTopic/ledgers";
        ByteString topic = ByteString.copyFromUtf8("testGCTopic");
        ByteString subid = ByteString.copyFromUtf8("testGCSubId");
        sub.subscribe(topic, subid, CreateOrAttach.CREATE_OR_ATTACH);
        sub.closeSubscription(topic, subid);


        for (int i = 1; i <= 100; i++) {
            pub.publish(topic, Message.newBuilder().setBody(
                                ByteString.copyFromUtf8(String.valueOf(i))).build());
        }
        LedgerRanges r = LedgerRanges.parseFrom(bktb.getZooKeeperClient().getData(ledgersPath, false, null));
        assertEquals("Should only have 1 ledger yet", 1, r.getRangesList().size());
        long firstLedger = r.getRangesList().get(0).getLedgerId();


        stopHubServers();
        startHubServers();


        pub.publish(topic, Message.newBuilder().setBody(
                            ByteString.copyFromUtf8(String.valueOf(0xdeadbeef))).build());


        r = LedgerRanges.parseFrom(bktb.getZooKeeperClient().getData(ledgersPath, false, null));
        assertEquals("Should have 2 ledgers after restart", 2, r.getRangesList().size());


        for (int i = 100; i <= 200; i++) {
            pub.publish(topic, Message.newBuilder().setBody(
                                ByteString.copyFromUtf8(String.valueOf(i))).build());
        }
        Thread.sleep(5000); // give GC a chance to happen


        r = LedgerRanges.parseFrom(bktb.getZooKeeperClient().getData(ledgersPath, false, null));
        long secondLedger = r.getRangesList().get(0).getLedgerId();


        assertEquals("Should only have 1 ledger after GC", 1, r.getRangesList().size());


        // ensure original ledger doesn't exist
        String firstLedgerPath = String.format("/ledgers/L%010d", firstLedger);
        String secondLedgerPath = String.format("/ledgers/L%010d", secondLedger);
        assertNull("Ledger should not exist", bktb.getZooKeeperClient().exists(firstLedgerPath, false));
        assertNotNull("Ledger should exist", bktb.getZooKeeperClient().exists(secondLedgerPath, false));


        client.close();
    }

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    // The following 4 tests are to make sure that the subscriberId validation
    // also works when it is a hub subscriber and we're expecting the
    // subscriberId to be in the "hub" specific format.
    @Test(timeout=10000)
    public void testSyncHubSubscribeWithInvalidSubscriberId() throws Exception {
        Client hubClient = new HedwigHubClient(new HubClientConfiguration());
        Subscriber hubSubscriber = hubClient.getSubscriber();
        boolean subscribeSuccess = false;
        try {
            hubSubscriber.subscribe(getTopic(0), localSubscriberId, CreateOrAttach.CREATE_OR_ATTACH);
        } catch (InvalidSubscriberIdException e) {
            subscribeSuccess = true;
        } catch (Exception ex) {
            subscribeSuccess = false;
        }
        assertTrue(subscribeSuccess);
        hubClient.close();
    }

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        hubClient.close();
    }


    @Test(timeout=10000)
    public void testAsyncHubSubscribeWithInvalidSubscriberId() throws Exception {
        Client hubClient = new HedwigHubClient(new HubClientConfiguration());
        Subscriber hubSubscriber = hubClient.getSubscriber();
        hubSubscriber.asyncSubscribe(getTopic(0), localSubscriberId, CreateOrAttach.CREATE_OR_ATTACH, new TestCallback(
                                         queue), null);
        assertFalse(queue.take());
        hubClient.close();
    }

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        hubClient.close();
    }


    @Test(timeout=10000)
    public void testSyncHubUnsubscribeWithInvalidSubscriberId() throws Exception {
        Client hubClient = new HedwigHubClient(new HubClientConfiguration());
        Subscriber hubSubscriber = hubClient.getSubscriber();
        boolean unsubscribeSuccess = false;
        try {
            hubSubscriber.unsubscribe(getTopic(0), localSubscriberId);
        } catch (InvalidSubscriberIdException e) {
            unsubscribeSuccess = true;
        } catch (Exception ex) {
            unsubscribeSuccess = false;
        }
        assertTrue(unsubscribeSuccess);
        hubClient.close();
    }

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        hubClient.close();
    }


    @Test(timeout=10000)
    public void testAsyncHubUnsubscribeWithInvalidSubscriberId() throws Exception {
        Client hubClient = new HedwigHubClient(new HubClientConfiguration());
        Subscriber hubSubscriber = hubClient.getSubscriber();
        hubSubscriber.asyncUnsubscribe(getTopic(0), localSubscriberId, new TestCallback(queue), null);
        assertFalse(queue.take());
        hubClient.close();
    }

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Related Classes of org.apache.hedwig.client.api.Client

org.apache.hedwig.server.integration.TestHedwigHub

org.apache.hedwig.server.persistence.MessageBoundedPersistenceTest

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