JAVA-6390: Move kafka articles from libraries-data-3 to new module

apache-kafka
2021-08-15 17:02:31 +05:30
parent b623297829
commit 62eaeb4835
4 changed files with 89 additions and 295 deletions
@@ -0,0 +1,83 @@
+package com.baeldung.kafka.admin;
+
+import org.apache.kafka.clients.admin.Admin;
+import org.apache.kafka.clients.admin.AdminClientConfig;
+import org.apache.kafka.clients.admin.CreateTopicsOptions;
+import org.apache.kafka.clients.admin.CreateTopicsResult;
+import org.apache.kafka.clients.admin.NewTopic;
+import org.apache.kafka.common.KafkaFuture;
+import org.apache.kafka.common.config.TopicConfig;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Properties;
+
+public class KafkaTopicApplication {
+
+    private final Properties properties;
+
+    public KafkaTopicApplication(Properties properties) {
+        this.properties = properties;
+    }
+
+    public void createTopic(String topicName) throws Exception {
+        try (Admin admin = Admin.create(properties)) {
+            int partitions = 1;
+            short replicationFactor = 1;
+            NewTopic newTopic = new NewTopic(topicName, partitions, replicationFactor);
+
+            CreateTopicsResult result = admin.createTopics(Collections.singleton(newTopic));
+
+            // get the async result for the new topic creation
+            KafkaFuture<Void> future = result.values()
+                .get(topicName);
+
+            // call get() to block until topic creation has completed or failed
+            future.get();
+        }
+    }
+
+    public void createTopicWithOptions(String topicName) throws Exception {
+        Properties props = new Properties();
+        props.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092");
+
+        try (Admin admin = Admin.create(props)) {
+            int partitions = 1;
+            short replicationFactor = 1;
+            NewTopic newTopic = new NewTopic(topicName, partitions, replicationFactor);
+
+            CreateTopicsOptions topicOptions = new CreateTopicsOptions().validateOnly(true)
+                .retryOnQuotaViolation(true);
+
+            CreateTopicsResult result = admin.createTopics(Collections.singleton(newTopic), topicOptions);
+
+            KafkaFuture<Void> future = result.values()
+                .get(topicName);
+            future.get();
+        }
+    }
+
+    public void createCompactedTopicWithCompression(String topicName) throws Exception {
+        Properties props = new Properties();
+        props.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092");
+
+        try (Admin admin = Admin.create(props)) {
+            int partitions = 1;
+            short replicationFactor = 1;
+
+            // Create a compacted topic with 'lz4' compression codec
+            Map<String, String> newTopicConfig = new HashMap<>();
+            newTopicConfig.put(TopicConfig.CLEANUP_POLICY_CONFIG, TopicConfig.CLEANUP_POLICY_COMPACT);
+            newTopicConfig.put(TopicConfig.COMPRESSION_TYPE_CONFIG, "lz4");
+            NewTopic newTopic = new NewTopic(topicName, partitions, replicationFactor).configs(newTopicConfig);
+
+            CreateTopicsResult result = admin.createTopics(Collections.singleton(newTopic));
+
+            KafkaFuture<Void> future = result.values()
+                .get(topicName);
+            future.get();
+        }
+    }
+
+}