test: 테스트를 위한 토픽 관리용 AdminClient 및 관련 처리 로직 추가

src/test/java/com/sangdol/consumer/test/TestAdminClient.java

@@ -0,0 +1,85 @@
+package com.sangdol.consumer.test;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Properties;
+import java.util.Set;
+
+import org.apache.kafka.clients.admin.AdminClient;
+import org.apache.kafka.clients.admin.AdminClientConfig;
+import org.apache.kafka.clients.admin.NewTopic;
+import org.apache.kafka.common.config.TopicConfig;
+
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public class TestAdminClient implements AutoCloseable {
+
+	private final AdminClient adminClient;
+
+	public TestAdminClient(String bootStrapServers) {
+		this.adminClient = adminClient(bootStrapServers);
+	}
+
+	private AdminClient adminClient(String bootStrapServers) {
+		Properties props = new Properties();
+		props.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, bootStrapServers);
+		return AdminClient.create(props);
+	}
+
+	public void createTopicsIfNotExists(List<String> topics) {
+		Set<String> currentTopics = getCurrentTopics();
+		if (currentTopics.containsAll(topics)) {
+			log.info("[TestAdminClient] Topic Already Exists ");
+			return;
+		}
+
+		int partitions = 3;
+		short replicationFactor = 3;
+		Map<String, String> topicConfigs = Map.of(
+			TopicConfig.MIN_IN_SYNC_REPLICAS_CONFIG, "2"
+		);
+
+		List<NewTopic> newTopics = topics.stream()
+			.map(topic -> new NewTopic(topic, partitions, replicationFactor).configs(topicConfigs))
+			.toList();
+
+		try {
+			adminClient.createTopics(newTopics)
+				.all()
+				.get();
+		} catch (Exception e) {
+			throw new RuntimeException(e);
+		}
+	}
+
+	public void deleteTopicsIfExists() {
+		try {
+			Set<String> topics = getCurrentTopics();
+			if (topics.isEmpty()) {
+				log.info("[TestAdminClient] no exist topics");
+				return;
+			}
+
+			adminClient.deleteTopics(topics)
+				.all()
+				.get();
+			log.info("[ConsumerWorker] Successfully delete {} topics( {} )", topics.size(), String.join(", ", topics));
+		} catch (Exception e) {
+			throw new RuntimeException(e);
+		}
+	}
+
+	private Set<String> getCurrentTopics() {
+		try {
+			return adminClient.listTopics().names().get();
+		} catch (Exception e) {
+			throw new RuntimeException(e);
+		}
+	}
+
+	@Override
+	public void close() throws Exception {
+		adminClient.close();
+	}
+}

src/test/java/com/sangdol/consumer/test/TestUtils.java

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+package com.sangdol.consumer.test;
+
+import org.junit.jupiter.api.Test;
+
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public class TestUtils {
+
+	private static final String BOOTSTRAP_SERVERS = "localhost:29092,localhost:39092,localhost:49092";
+
+	@Test
+	void deleteAllExistTopics() {
+		try (TestAdminClient adminClient = new TestAdminClient(BOOTSTRAP_SERVERS)) {
+			adminClient.deleteTopicsIfExists();
+		} catch (Exception e) {
+			throw new RuntimeException(e);
+		}
+	}
+}