[KAFKA] Adding new client code

[dmaap/kafka11aaf.git] / kafkaClient / src / main / java / org / onap / dmaap / kafka / OnapKafkaProducer.java

diff --git a/kafkaClient/src/main/java/org/onap/dmaap/kafka/OnapKafkaProducer.java b/kafkaClient/src/main/java/org/onap/dmaap/kafka/OnapKafkaProducer.java
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+/*-
+ * ============LICENSE_START=======================================================
+ * dmaap-kafka-client
+ * ================================================================================
+ * Copyright (C) 2023 Nordix Foundation. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.dmaap.kafka;
+
+import java.util.List;
+import java.util.Properties;
+import java.util.UUID;
+import java.util.concurrent.ExecutionException;
+import org.apache.kafka.clients.CommonClientConfigs;
+import org.apache.kafka.clients.producer.KafkaProducer;
+import org.apache.kafka.clients.producer.ProducerConfig;
+import org.apache.kafka.clients.producer.ProducerRecord;
+import org.apache.kafka.clients.producer.RecordMetadata;
+import org.apache.kafka.common.KafkaException;
+import org.apache.kafka.common.config.SaslConfigs;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Utility class that provides a KafkaProducer to communicate with a kafka cluster
+ */
+public class OnapKafkaProducer {
+
+    private final Logger log = LoggerFactory.getLogger(OnapKafkaProducer.class);
+    private final KafkaProducer<String, String> producer;
+    private final List<String> producerTopics;
+
+    /**
+     *
+     * @param configuration The config provided to the client
+     */
+    public OnapKafkaProducer(IKafkaConfig configuration) {
+        producerTopics = configuration.getProducerTopics();
+        log.debug("Instantiating kafka producer for topics {}", producerTopics);
+        Properties props = new Properties();
+
+        props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringSerializer");
+        props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG,  "org.apache.kafka.common.serialization.StringSerializer");
+        props.put(ProducerConfig.CLIENT_ID_CONFIG, configuration.getConsumerID() + "-producer-" + UUID.randomUUID());
+        props.put(CommonClientConfigs.SECURITY_PROTOCOL_CONFIG, configuration.getKafkaSecurityProtocolConfig());
+        props.put(CommonClientConfigs.BOOTSTRAP_SERVERS_CONFIG, configuration.getKafkaBootstrapServers());
+        props.put(SaslConfigs.SASL_JAAS_CONFIG, configuration.getKafkaSaslJaasConfig());
+        props.put(SaslConfigs.SASL_MECHANISM, configuration.getKafkaSaslMechanism());
+        props.put(ProducerConfig.MAX_BLOCK_MS_CONFIG, 10000);
+        producer = new KafkaProducer<>(props);
+    }
+
+    /**
+     *
+     * @param topicName The name of the topic to publish the data to
+     * @param value The value of the data
+     * @return The RecordMetedata of the request
+     */
+    public RecordMetadata sendDataSynch(String topicName, String value) {
+        RecordMetadata data = null;
+        try {
+            data = producer.send(new ProducerRecord<>(topicName, value)).get();
+            log.debug("Data sent to topic {} at partition no {} and offset {}", topicName, data.partition(), data.offset());
+        } catch (KafkaException | ExecutionException | InterruptedException e) {
+            log.error("Failed the send data: exc {}", e.getMessage());
+        } finally {
+            producer.flush();
+        }
+        return data;
+    }
+}
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