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KafkaConsumerStream.java
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KafkaConsumerStream.java
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/*
* Copyright (c) 2021 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.connectivity.service.messaging.kafka;
import java.util.concurrent.CompletionStage;
import java.util.function.BiConsumer;
import javax.annotation.concurrent.Immutable;
import org.apache.pekko.Done;
/**
* A start- and stoppable kafka consumer stream.
*/
@Immutable
interface KafkaConsumerStream {
/**
* Allows registering a handler for stream completion.
*
* @param handleCompletion the handler
* @return the chained completion stage. Completes when the Stream completes and the handler finished.
*/
CompletionStage<Done> whenComplete(BiConsumer<? super Done, ? super Throwable> handleCompletion);
/**
* Stops the consumer stream gracefully.
*
* @return A completion stage that completes when the stream is stopped.
*/
CompletionStage<Done> stop();
/**
* Triggers report of metrics to DittoMetrics.
*/
void reportMetrics();
}