group.rxcloud.capa.component.pubsub.NewMessage Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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
*
* http://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 group.rxcloud.capa.component.pubsub;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
/**
* NewMessage is an event arriving from a message bus instance.
*/
public class NewMessage {
private final String topic;
private final Object data;
private Map metadata = new HashMap<>();
public NewMessage(String topic, Object data) {
this.topic = topic;
this.data = data;
}
public String getTopic() {
return topic;
}
public Object getData() {
return data;
}
public Map getMetadata() {
return metadata;
}
public NewMessage setMetadata(Map metadata) {
this.metadata = metadata == null ? null : Collections.unmodifiableMap(metadata);
return this;
}
}