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MqttHeader.java
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MqttHeader.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.mqtt;
import java.util.Arrays;
import java.util.List;
/**
* Defines well-known MQTT properties that should be extracted from consumed mqtt messages and made available for
* source header mappings. E.g. the mqtt topic on which the message was received is available in the header
* {@code mqtt.topic}.
*/
public enum MqttHeader {
MQTT_TOPIC("mqtt.topic"),
MQTT_QOS("mqtt.qos"),
MQTT_RETAIN("mqtt.retain");
private final String name;
/**
* @param name the header name to be used in source header mappings
*/
MqttHeader(final String name) {
this.name = name;
}
/**
* @return the header name
*/
public String getName() {
return name;
}
/**
* @return list of default header names used for mqtt sources
*/
public static List<String> getHeaderNames() {
return Arrays.stream(values()).map(MqttHeader::getName).toList();
}
}