Set producer listener obtained from the context

- When creating the KafkaMessageChannelBinder set the producer listener that is being autowired in the configuration
 - Add test

This resolves #49

spring-cloud-stream-binder-kafka/pom.xml

@@ -66,6 +66,11 @@
 			<artifactId>spring-integration-kafka</artifactId>
 			<version>${spring-integration-kafka.version}</version>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-test</artifactId>
+			<scope>test</scope>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework.kafka</groupId>
 			<artifactId>spring-kafka-test</artifactId>

spring-cloud-stream-binder-kafka/src/main/java/org/springframework/cloud/stream/binder/kafka/config/KafkaBinderConfiguration.java

@@ -87,7 +87,7 @@ public class KafkaBinderConfiguration {
 		KafkaMessageChannelBinder kafkaMessageChannelBinder = new KafkaMessageChannelBinder(
 				this.configurationProperties);
 		kafkaMessageChannelBinder.setCodec(this.codec);
-		//kafkaMessageChannelBinder.setProducerListener(producerListener);
+		kafkaMessageChannelBinder.setProducerListener(producerListener);
 		kafkaMessageChannelBinder.setExtendedBindingProperties(this.kafkaExtendedBindingProperties);
 		kafkaMessageChannelBinder.setAdminUtilsOperation(adminUtilsOperation);
 		return kafkaMessageChannelBinder;

spring-cloud-stream-binder-kafka/src/test/java/org/springframework/cloud/stream/binder/kafka/AbstractKafkaTestBinder.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2014-2016 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 org.springframework.cloud.stream.binder.kafka;
 
 import java.util.List;

spring-cloud-stream-binder-kafka/src/test/java/org/springframework/cloud/stream/binder/kafka/KafkaBinderConfigurationTest.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2016 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 org.springframework.cloud.stream.binder.kafka;
+
+import static org.junit.Assert.assertNotNull;
+
+import java.lang.reflect.Field;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.cloud.stream.binder.kafka.config.KafkaBinderConfiguration;
+import org.springframework.kafka.support.ProducerListener;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.util.ReflectionUtils;
+
+/**
+ * @author Ilayaperumal Gopinathan
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringBootTest(classes = KafkaBinderConfiguration.class)
+public class KafkaBinderConfigurationTest {
+
+	@Autowired
+	private KafkaMessageChannelBinder kafkaMessageChannelBinder;
+
+	@Test
+	public void testKafkaBinderProducerListener() {
+		assertNotNull(this.kafkaMessageChannelBinder);
+		Field producerListenerField = ReflectionUtils.findField(
+				KafkaMessageChannelBinder.class, "producerListener",
+				ProducerListener.class);
+		ReflectionUtils.makeAccessible(producerListenerField);
+		ProducerListener producerListener = (ProducerListener) ReflectionUtils.getField(
+				producerListenerField, this.kafkaMessageChannelBinder);
+		assertNotNull(producerListener);
+	}
+}