Adding new sample for multibinder kafka streams

multibinder-samples/multibinder-kafka-streams/src/main/java/multibinder/Producers.java

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+/*
+ * Copyright 2018 the original author or authors.
+ *
+ * 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.
+ */
+
+package multibinder;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.apache.kafka.clients.producer.ProducerConfig;
+import org.apache.kafka.common.serialization.Serde;
+import org.apache.kafka.common.serialization.StringSerializer;
+import org.springframework.kafka.core.DefaultKafkaProducerFactory;
+import org.springframework.kafka.core.KafkaTemplate;
+import org.springframework.kafka.support.serializer.JsonSerde;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * @author Soby Chacko
+ */
+public class Producers {
+
+	public static void main(String... args) {
+
+		ObjectMapper mapper = new ObjectMapper();
+		Serde<DomainEvent> domainEventSerde = new JsonSerde<>(DomainEvent.class, mapper);
+
+
+		Map<String, Object> props = new HashMap<>();
+		props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9093");
+		props.put(ProducerConfig.RETRIES_CONFIG, 0);
+		props.put(ProducerConfig.BATCH_SIZE_CONFIG, 16384);
+		props.put(ProducerConfig.LINGER_MS_CONFIG, 1);
+		props.put(ProducerConfig.BUFFER_MEMORY_CONFIG, 33554432);
+		props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
+		props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, domainEventSerde.serializer().getClass());
+
+		DomainEvent ddEvent = new DomainEvent();
+		ddEvent.setBoardUuid("12345");
+		ddEvent.setEventType("thisisanevent");
+
+		DefaultKafkaProducerFactory<String, DomainEvent> pf = new DefaultKafkaProducerFactory<>(props);
+		KafkaTemplate<String, DomainEvent> template = new KafkaTemplate<>(pf, true);
+		template.setDefaultTopic("foobar");
+
+		template.sendDefault("", ddEvent);
+	}
+}