API Compatibility Back Ports

Allow Hoxton.SR9 to work with Boot 2.2 (with s-k upgraded to 2.4.x).

Author: garyrussell

spring-kafka/src/main/java/org/springframework/kafka/core/DefaultKafkaProducerFactory.java

@@ -291,6 +291,7 @@ public boolean isProducerPerConsumerPartition() {
 	 * @return the configs.
 	 * @since 1.3
 	 */
+	@Override
 	public Map<String, Object> getConfigurationProperties() {
 		return Collections.unmodifiableMap(this.configs);
 	}

spring-kafka/src/main/java/org/springframework/kafka/core/ProducerFactory.java

@@ -16,6 +16,8 @@
 
 package org.springframework.kafka.core;
 
+import java.util.Map;
+
 import org.apache.kafka.clients.producer.Producer;
 
 /**
@@ -98,4 +100,14 @@ default void reset() {
 		// NOSONAR
 	}
 
+	/**
+	 * Return an unmodifiable reference to the configuration map for this factory.
+	 * Useful for cloning to make a similar factory.
+	 * @return the configs.
+	 * @since 2.4.11
+	 */
+	default Map<String, Object> getConfigurationProperties() {
+		throw new UnsupportedOperationException("This implementation doesn't support this method");
+	}
+
 }

spring-kafka/src/main/java/org/springframework/kafka/listener/ContainerProperties.java

@@ -663,6 +663,15 @@ public void setAssignmentCommitOption(AssignmentCommitOption assignmentCommitOpt
 		this.assignmentCommitOption = assignmentCommitOption;
 	}
 
+	/**
+	 * False - back ported to make Hoxton.SR9 compatible with Boot 2.2.
+	 * @return false.
+	 * @since 2.4.11
+	 */
+	public boolean isDeliveryAttemptHeader() {
+		return false;
+	}
+
 	@Override
 	public String toString() {
 		return "ContainerProperties ["