GH-1480: Switch to CompletableFuture in s-r-stream

Resolves https://github.com/spring-projects/spring-amqp/issues/1480

spring-rabbit-stream/src/main/java/org/springframework/rabbit/stream/producer/RabbitStreamOperations2.java

@@ -0,0 +1,97 @@
+/*
+ * Copyright 2022 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
+ *
+ *      https://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.rabbit.stream.producer;
+
+import java.util.concurrent.CompletableFuture;
+
+import org.springframework.amqp.AmqpException;
+import org.springframework.amqp.core.Message;
+import org.springframework.amqp.core.MessagePostProcessor;
+import org.springframework.amqp.support.converter.MessageConverter;
+import org.springframework.lang.Nullable;
+import org.springframework.rabbit.stream.support.converter.StreamMessageConverter;
+
+import com.rabbitmq.stream.MessageBuilder;
+
+/**
+ * Provides methods for sending messages using a RabbitMQ Stream producer,
+ * returning {@link CompletableFuture}.
+ *
+ * @author Gary Russell
+ * @since 2.4.7
+ *
+ */
+public interface RabbitStreamOperations2 extends AutoCloseable {
+
+	/**
+	 * Send a Spring AMQP message.
+	 * @param message the message.
+	 * @return a future to indicate success/failure.
+	 */
+	CompletableFuture<Boolean> send(Message message);
+
+	/**
+	 * Convert to and send a Spring AMQP message.
+	 * @param message the payload.
+	 * @return a future to indicate success/failure.
+	 */
+	CompletableFuture<Boolean> convertAndSend(Object message);
+
+	/**
+	 * Convert to and send a Spring AMQP message. If a {@link MessagePostProcessor} is
+	 * provided and returns {@code null}, the message is not sent and the future is
+	 * completed with {@code false}.
+	 * @param message the payload.
+	 * @param mpp a message post processor.
+	 * @return a future to indicate success/failure.
+	 */
+	CompletableFuture<Boolean> convertAndSend(Object message, @Nullable MessagePostProcessor mpp);
+
+	/**
+	 * Send a native stream message.
+	 * @param message the message.
+	 * @return a future to indicate success/failure.
+	 * @see #messageBuilder()
+	 */
+	CompletableFuture<Boolean> send(com.rabbitmq.stream.Message message);
+
+	/**
+	 * Return the producer's {@link MessageBuilder} to create native stream messages.
+	 * @return the builder.
+	 * @see #send(com.rabbitmq.stream.Message)
+	 */
+	MessageBuilder messageBuilder();
+
+	/**
+	 * Return the message converter.
+	 * @return the converter.
+	 */
+	MessageConverter messageConverter();
+
+	/**
+	 * Return the stream message converter.
+	 * @return the converter;
+	 */
+	StreamMessageConverter streamMessageConverter();
+
+	@Override
+	default void close() throws AmqpException {
+		// narrow exception to avoid compiler warning - see
+		// https://bugs.openjdk.java.net/browse/JDK-8155591
+	}
+
+}

spring-rabbit-stream/src/main/java/org/springframework/rabbit/stream/producer/RabbitStreamTemplate.java

@@ -42,8 +42,9 @@ import com.rabbitmq.stream.ProducerBuilder;
  *
  * @author Gary Russell
  * @since 2.4
- *
+ * @deprecated in favor of {@link RabbitStreamTemplate2}.
  */
+@Deprecated
 public class RabbitStreamTemplate implements RabbitStreamOperations, BeanNameAware {
 
 	protected final LogAccessor logger = new LogAccessor(getClass()); // NOSONAR

spring-rabbit-stream/src/main/java/org/springframework/rabbit/stream/producer/RabbitStreamTemplate2.java

@@ -0,0 +1,225 @@
+/*
+ * Copyright 2021 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
+ *
+ *      https://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.rabbit.stream.producer;
+
+import java.util.concurrent.CompletableFuture;
+
+import org.springframework.amqp.core.Message;
+import org.springframework.amqp.core.MessagePostProcessor;
+import org.springframework.amqp.support.converter.MessageConverter;
+import org.springframework.amqp.support.converter.SimpleMessageConverter;
+import org.springframework.beans.factory.BeanNameAware;
+import org.springframework.core.log.LogAccessor;
+import org.springframework.lang.Nullable;
+import org.springframework.rabbit.stream.support.StreamMessageProperties;
+import org.springframework.rabbit.stream.support.converter.DefaultStreamMessageConverter;
+import org.springframework.rabbit.stream.support.converter.StreamMessageConverter;
+import org.springframework.util.Assert;
+
+import com.rabbitmq.stream.ConfirmationHandler;
+import com.rabbitmq.stream.Constants;
+import com.rabbitmq.stream.Environment;
+import com.rabbitmq.stream.MessageBuilder;
+import com.rabbitmq.stream.Producer;
+import com.rabbitmq.stream.ProducerBuilder;
+
+/**
+ * Default implementation of {@link RabbitStreamOperations}.
+ *
+ * @author Gary Russell
+ * @since 2.4.7
+ *
+ */
+public class RabbitStreamTemplate2 implements RabbitStreamOperations2, BeanNameAware {
+
+	protected final LogAccessor logger = new LogAccessor(getClass()); // NOSONAR
+
+	private final Environment environment;
+
+	private final String streamName;
+
+	private MessageConverter messageConverter = new SimpleMessageConverter();
+
+	private StreamMessageConverter streamConverter = new DefaultStreamMessageConverter();
+
+	private boolean streamConverterSet;
+
+	private Producer producer;
+
+	private String beanName;
+
+	private ProducerCustomizer producerCustomizer = (name, builder) -> { };
+
+	/**
+	 * Construct an instance with the provided {@link Environment}.
+	 * @param environment the environment.
+	 * @param streamName the stream name.
+	 */
+	public RabbitStreamTemplate2(Environment environment, String streamName) {
+		Assert.notNull(environment, "'environment' cannot be null");
+		Assert.notNull(streamName, "'streamName' cannot be null");
+		this.environment = environment;
+		this.streamName = streamName;
+	}
+
+
+	private synchronized Producer createOrGetProducer() {
+		if (this.producer == null) {
+			ProducerBuilder builder = this.environment.producerBuilder();
+			builder.stream(this.streamName);
+			this.producerCustomizer.accept(this.beanName, builder);
+			this.producer = builder.build();
+			if (!this.streamConverterSet) {
+				((DefaultStreamMessageConverter) this.streamConverter).setBuilderSupplier(
+						() ->  this.producer.messageBuilder());
+			}
+		}
+		return this.producer;
+	}
+
+	@Override
+	public synchronized void setBeanName(String name) {
+		this.beanName = name;
+	}
+
+	/**
+	 * Set a converter for {@link #convertAndSend(Object)} operations.
+	 * @param messageConverter the converter.
+	 */
+	public void setMessageConverter(MessageConverter messageConverter) {
+		Assert.notNull(messageConverter, "'messageConverter' cannot be null");
+		this.messageConverter = messageConverter;
+	}
+
+	/**
+	 * Set a converter to convert from {@link Message} to {@link com.rabbitmq.stream.Message}
+	 * for {@link #send(Message)} and {@link #convertAndSend(Object)} methods.
+	 * @param streamConverter the converter.
+	 */
+	public synchronized void setStreamConverter(StreamMessageConverter streamConverter) {
+		Assert.notNull(streamConverter, "'streamConverter' cannot be null");
+		this.streamConverter = streamConverter;
+		this.streamConverterSet = true;
+	}
+
+	/**
+	 * Used to customize the {@link ProducerBuilder} before the {@link Producer} is built.
+	 * @param producerCustomizer the customizer;
+	 */
+	public synchronized void setProducerCustomizer(ProducerCustomizer producerCustomizer) {
+		Assert.notNull(producerCustomizer, "'producerCustomizer' cannot be null");
+		this.producerCustomizer = producerCustomizer;
+	}
+
+	@Override
+	public MessageConverter messageConverter() {
+		return this.messageConverter;
+	}
+
+
+	@Override
+	public StreamMessageConverter streamMessageConverter() {
+		return this.streamConverter;
+	}
+
+
+	@Override
+	public CompletableFuture<Boolean> send(Message message) {
+		CompletableFuture<Boolean> future = new CompletableFuture<>();
+		createOrGetProducer().send(this.streamConverter.fromMessage(message), handleConfirm(future));
+		return future;
+	}
+
+	@Override
+	public CompletableFuture<Boolean> convertAndSend(Object message) {
+		return convertAndSend(message, null);
+	}
+
+	@Override
+	public CompletableFuture<Boolean> convertAndSend(Object message, @Nullable MessagePostProcessor mpp) {
+		Message message2 = this.messageConverter.toMessage(message, new StreamMessageProperties());
+		Assert.notNull(message2, "The message converter returned null");
+		if (mpp != null) {
+			message2 = mpp.postProcessMessage(message2);
+			if (message2 == null) {
+				this.logger.debug("Message Post Processor returned null, message not sent");
+				CompletableFuture<Boolean> future = new CompletableFuture<>();
+				future.complete(false);
+				return future;
+			}
+		}
+		return send(message2);
+	}
+
+
+	@Override
+	public CompletableFuture<Boolean> send(com.rabbitmq.stream.Message message) {
+		CompletableFuture<Boolean> future = new CompletableFuture<>();
+		createOrGetProducer().send(message, handleConfirm(future));
+		return future;
+	}
+
+	@Override
+	public MessageBuilder messageBuilder() {
+		return createOrGetProducer().messageBuilder();
+	}
+
+	private ConfirmationHandler handleConfirm(CompletableFuture<Boolean> future) {
+		return confStatus -> {
+			if (confStatus.isConfirmed()) {
+				future.complete(true);
+			}
+			else {
+				int code = confStatus.getCode();
+				String errorMessage;
+				switch (code) {
+				case Constants.CODE_MESSAGE_ENQUEUEING_FAILED:
+					errorMessage = "Message Enqueueing Failed";
+					break;
+				case Constants.CODE_PRODUCER_CLOSED:
+					errorMessage = "Producer Closed";
+					break;
+				case Constants.CODE_PRODUCER_NOT_AVAILABLE:
+					errorMessage = "Producer Not Available";
+					break;
+				case Constants.CODE_PUBLISH_CONFIRM_TIMEOUT:
+					errorMessage = "Publish Confirm Timeout";
+					break;
+				default:
+					errorMessage = "Unknown code: " + code;
+					break;
+				}
+				future.completeExceptionally(new StreamSendException(errorMessage, code));
+			}
+		};
+	}
+
+	/**
+	 * {@inheritDoc}
+	 * <p>
+	 * <b>Close the underlying producer; a new producer will be created on the next
+	 * operation that requires one.</b>
+	 */
+	@Override
+	public synchronized void close() {
+		if (this.producer != null) {
+			this.producer.close();
+			this.producer = null;
+		}
+	}
+
+}

spring-rabbit-stream/src/test/java/org/springframework/rabbit/stream/listener/RabbitListenerTests.java

@@ -42,7 +42,7 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.DependsOn;
 import org.springframework.rabbit.stream.config.StreamRabbitListenerContainerFactory;
-import org.springframework.rabbit.stream.producer.RabbitStreamTemplate;
+import org.springframework.rabbit.stream.producer.RabbitStreamTemplate2;
 import org.springframework.rabbit.stream.retry.StreamRetryOperationsInterceptorFactoryBean;
 import org.springframework.rabbit.stream.support.StreamMessageProperties;
 import org.springframework.retry.interceptor.RetryOperationsInterceptor;
@@ -70,7 +70,7 @@ public class RabbitListenerTests extends AbstractIntegrationTests {
 	Config config;
 
 	@Test
-	void simple(@Autowired RabbitStreamTemplate template) throws Exception {
+	void simple(@Autowired RabbitStreamTemplate2 template) throws Exception {
 		Future<Boolean> future = template.convertAndSend("foo");
 		assertThat(future.get(10, TimeUnit.SECONDS)).isTrue();
 		future = template.convertAndSend("bar", msg -> msg);
@@ -247,8 +247,8 @@ public class RabbitListenerTests extends AbstractIntegrationTests {
 		}
 
 		@Bean
-		RabbitStreamTemplate streamTemplate1(Environment env) {
-			RabbitStreamTemplate template = new RabbitStreamTemplate(env, "test.stream.queue1");
+		RabbitStreamTemplate2 streamTemplate1(Environment env) {
+			RabbitStreamTemplate2 template = new RabbitStreamTemplate2(env, "test.stream.queue1");
 			template.setProducerCustomizer((name, builder) -> builder.name("test"));
 			return template;
 		}

src/reference/asciidoc/stream.adoc

@@ -67,6 +67,9 @@ The `ProducerCustomizer` provides a mechanism to customize the producer before i
 
 Refer to the https://rabbitmq.github.io/rabbitmq-stream-java-client/stable/htmlsingle/[Java Client Documentation] about customizing the `Environment` and `Producer`.
 
+IMPORTANT: In version 2.4.7 `RabbitStreamOperations` and `RabbitStreamTemplate` have been deprecated in favor of `RabbitStreamOperations2` and `RabbitStreamTemplate2` respectively; they return `CompletableFuture` instead of `ListenableFuture`.
+`RabbitStreamOperations` and `RabbitStreamTemplate` will be removed in 3.0.
+
 ==== Receiving Messages
 
 Asynchronous message reception is provided by the `StreamListenerContainer` (and the `StreamRabbitListenerContainerFactory` when using `@RabbitListener`).

src/reference/asciidoc/whats-new.adoc

@@ -33,3 +33,8 @@ See <<json-message-converter>> for more information.
 
 The `AsyncRabbitTemplate` is deprecated in favor of `AsyncRabbitTemplate2` which returns `CompletableFuture` s instead of `ListenableFuture` s.
 See <<async-template>> for more information.
+
+==== Stream Support Changes
+
+`RabbitStreamOperations` and `RabbitStreamTemplate` have been deprecated in favor of `RabbitStreamOperations2` and `RabbitStreamTemplate2` respectively; they return `CompletableFuture` instead of `ListenableFuture`.
+See <<stream-support>> for more information.