scylla-jmx/src/main/java/org/apache/cassandra/metrics/CacheMetrics.java

67 lines
2.4 KiB
Java
Raw Normal View History

/*
* 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.
*/
/*
* Copyright 2015 Cloudius Systems
*
* Modified by Cloudius Systems
*/
package org.apache.cassandra.metrics;
import javax.management.MalformedObjectNameException;
/**
* Metrics for {@code ICache}.
*/
public class CacheMetrics implements Metrics {
private final String type;
private final String url;
private String compose(String value) {
return "/cache_service/metrics/" + url + "/" + value;
}
/**
* Create metrics for given cache.
*
* @param type
* Type of Cache to identify metrics.
* @param cache
* Cache to measure metrics
*/
public CacheMetrics(String type, final String url) {
this.type = type;
this.url = url;
}
@Override
public void register(MetricsRegistry registry) throws MalformedObjectNameException {
MetricNameFactory factory = new DefaultNameFactory("Cache", type);
registry.register(() -> registry.gauge(compose("capacity")), factory.createMetricName("Capacity"));
registry.register(() -> registry.meter(compose("hits_moving_avrage")), factory.createMetricName("Hits"));
registry.register(() -> registry.meter(compose("requests_moving_avrage")),
factory.createMetricName("Requests"));
registry.register(() -> registry.gauge(Double.class, compose("hit_rate")), factory.createMetricName("HitRate"));
registry.register(() -> registry.gauge(compose("size")), factory.createMetricName("Size"));
registry.register(() -> registry.gauge(Integer.class, compose("entries")), factory.createMetricName("Entries"));
}
}