org.apache.rocketmq.client.java.metrics.MessageCacheObserver 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 org.apache.rocketmq.client.java.metrics;
import java.util.Map;
import org.apache.rocketmq.client.apis.consumer.PushConsumer;
/**
* The observer which could records the count and memory footprint of cached message in {@link PushConsumer}.
*/
public interface MessageCacheObserver {
/**
* Get the cached message count for each topic.
*
* @return the cached message count map.
*/
Map getCachedMessageCount();
/**
* Get the cached message memory footprint for each topic.
*
* @return the cached message footprint map.
*/
Map getCachedMessageBytes();
}