96 lines
3.2 KiB
Java
96 lines
3.2 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Copyright 2015 Cloudius Systems
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*
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* Modified by Cloudius Systems
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*/
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package org.apache.cassandra.metrics;
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import java.util.Arrays;
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import javax.management.MalformedObjectNameException;
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import javax.management.ObjectName;
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/**
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* Metrics about latencies
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*/
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public class LatencyMetrics implements Metrics {
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protected final MetricNameFactory[] factories;
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protected final String namePrefix;
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protected final String uri;
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protected final String param;
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/**
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* Create LatencyMetrics with given group, type, and scope. Name prefix for
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* each metric will be empty.
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*
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* @param type
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* Type name
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* @param scope
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* Scope
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*/
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public LatencyMetrics(String type, String scope, String uri) {
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this(type, "", scope, uri, null);
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}
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/**
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* Create LatencyMetrics with given group, type, prefix to append to each
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* metric name, and scope.
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*
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* @param type
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* Type name
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* @param namePrefix
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* Prefix to append to each metric name
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* @param scope
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* Scope of metrics
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*/
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public LatencyMetrics(String type, String namePrefix, String scope, String uri, String param) {
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this(namePrefix, uri, param, new DefaultNameFactory(type, scope));
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}
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public LatencyMetrics(String namePrefix, String uri, MetricNameFactory... factories) {
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this(namePrefix, uri, null, factories);
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}
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public LatencyMetrics(String namePrefix, String uri, String param, MetricNameFactory... factories) {
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this.factories = factories;
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this.namePrefix = namePrefix;
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this.uri = uri;
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this.param = param;
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}
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protected ObjectName[] names(String suffix) throws MalformedObjectNameException {
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return Arrays.stream(factories).map(f -> {
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try {
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return f.createMetricName(namePrefix + suffix);
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} catch (MalformedObjectNameException e) {
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throw new RuntimeException(e); // dung...
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}
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}).toArray(size -> new ObjectName[size]);
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}
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@Override
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public void register(MetricsRegistry registry) throws MalformedObjectNameException {
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String paramName = (param == null) ? "" : "/" + param;
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registry.register(() -> registry.timer(uri + "/moving_average_histogram" + paramName), names("Latency"));
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registry.register(() -> registry.counter(uri + paramName), names("TotalLatency"));
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}
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}
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