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StreamConstants.java
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StreamConstants.java
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/*
* Copyright (c) 2017 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.internal.utils.pekko.streaming;
import org.apache.pekko.actor.Status;
/**
* Constants used for streaming utils.
*/
public final class StreamConstants {
/**
* Message which signals that a stream has been successfully finished.
*/
public static final Object STREAM_COMPLETED = new Status.Success("done");
/**
* Message which signals that a stream is started.
*/
public static final Object STREAM_STARTED = new Status.Success("start");
/**
* Ack message from {@code AbstractStreamForwarder} to {@code AbstractStreamingActor} for back-pressure.
*/
public static final Object STREAM_ACK_MSG = new Status.Success("ack");
/**
* Message to signal upstream failure.
*/
public static final Object STREAM_FAILED = new Status.Success("failed");
/**
* Message received by stream forwarder to signal that all messages for a stream element have been sent.
*/
public static final Object DOES_NOT_HAVE_NEXT_MSG = new Status.Success("no-next");
/**
* Message which signals the forwarder stayed idle for too long.
*/
public static final Object FORWARDER_EXCEEDED_MAX_IDLE_TIME_MSG = new Status.Success("max-idle-time-exceeded");
private StreamConstants() {
throw new AssertionError();
}
}