JAVA-1848: new module apache-libraries to group apache-* modules with a

single article
2020-06-12 12:09:52 +05:30
parent adfe659aa7
commit 486050f4fd
61 changed files with 305579 additions and 0 deletions
--- a/apache-libraries/src/main/java/com/baeldung/pulsar/subscriptions/FailoverSubscriptionUnitTest.java
+++ b/apache-libraries/src/main/java/com/baeldung/pulsar/subscriptions/FailoverSubscriptionUnitTest.java
@@ -0,0 +1,76 @@
+package com.baeldung.pulsar.subscriptions;
+
+import org.apache.pulsar.client.api.Consumer;
+import org.apache.pulsar.client.api.ConsumerBuilder;
+import org.apache.pulsar.client.api.Message;
+import org.apache.pulsar.client.api.MessageBuilder;
+import org.apache.pulsar.client.api.Producer;
+import org.apache.pulsar.client.api.PulsarClient;
+import org.apache.pulsar.client.api.PulsarClientException;
+import org.apache.pulsar.client.api.SubscriptionType;
+
+import java.util.stream.IntStream;
+
+public class FailoverSubscriptionUnitTest {
+    private static final String SERVICE_URL = "pulsar://localhost:6650";
+    private static final String TOPIC_NAME = "failover-subscription-test-topic";
+    private static final String SUBSCRIPTION_NAME = "test-subscription";
+    private static final SubscriptionType SUBSCRIPTION_TYPE = SubscriptionType.Failover;
+    private static final int NUM_MSGS = 10;
+
+    public static void main(String[] args) throws PulsarClientException {
+        PulsarClient client = PulsarClient.builder()
+                .serviceUrl(SERVICE_URL)
+                .build();
+
+        Producer<byte[]> producer = client.newProducer()
+                .topic(TOPIC_NAME)
+                .create();
+
+        ConsumerBuilder<byte[]> consumerBuilder = client.newConsumer()
+                .topic(TOPIC_NAME)
+                .subscriptionName(SUBSCRIPTION_NAME)
+                .subscriptionType(SUBSCRIPTION_TYPE);
+
+        Consumer<byte[]> mainConsumer = consumerBuilder
+                .consumerName("consumer-a")
+                .messageListener((consumer, msg) -> {
+                    System.out.println("Message received by main consumer");
+
+                    try {
+                        consumer.acknowledge(msg);
+                    } catch (PulsarClientException e) {
+                        System.out.println(e.getMessage());
+                    }
+                })
+                .subscribe();
+
+        Consumer<byte[]> failoverConsumer = consumerBuilder
+                .consumerName("consumer-b")
+                .messageListener((consumer, msg) -> {
+                    System.out.println("Message received by failover consumer");
+
+                    try {
+                        consumer.acknowledge(msg);
+                    } catch (PulsarClientException e) {
+                        System.out.println(e.getMessage());
+                    }
+                })
+                .subscribe();
+
+        IntStream.range(0, NUM_MSGS).forEach(i -> {
+            Message<byte[]> msg = MessageBuilder.create()
+                    .setContent(String.format("message-%d", i).getBytes())
+                    .build();
+            try {
+                producer.send(msg);
+
+                Thread.sleep(100);
+
+                if (i > 5) mainConsumer.close();
+            } catch (InterruptedException | PulsarClientException e) {
+                System.out.println(e.getMessage());
+            }
+        });
+    }
+}