org.apache.dubbo.metrics.data.ApplicationStatComposite Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of dubbo Show documentation
The all in one project of dubbo
The newest version!
/*
 * 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.dubbo.metrics.data;

import org.apache.dubbo.common.utils.CollectionUtils;
import org.apache.dubbo.metrics.model.MetricsCategory;
import org.apache.dubbo.metrics.model.MetricsSupport;
import org.apache.dubbo.metrics.model.key.MetricsKey;
import org.apache.dubbo.metrics.model.sample.GaugeMetricSample;
import org.apache.dubbo.metrics.model.sample.MetricSample;
import org.apache.dubbo.metrics.report.AbstractMetricsExport;
import org.apache.dubbo.rpc.model.ApplicationModel;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicLong;

/**
 * Application-level data container, for the initialized MetricsKey,
 * different from the null value of the Map type (the key is not displayed when there is no data),
 * the key is displayed and the initial data is 0 value of the AtomicLong type
 */
public class ApplicationStatComposite extends AbstractMetricsExport {

    public ApplicationStatComposite(ApplicationModel applicationModel) {
        super(applicationModel);
    }

    private final Map applicationNumStats = new ConcurrentHashMap<>();

    private final AtomicBoolean samplesChanged = new AtomicBoolean(true);

    public void init(List appKeys) {
        if (CollectionUtils.isEmpty(appKeys)) {
            return;
        }
        appKeys.forEach(appKey -> {
            applicationNumStats.put(appKey, new AtomicLong(0L));
        });
        samplesChanged.set(true);
    }

    public void incrementSize(MetricsKey metricsKey, int size) {
        if (!applicationNumStats.containsKey(metricsKey)) {
            return;
        }
        applicationNumStats.get(metricsKey).getAndAdd(size);
    }

    public void setAppKey(MetricsKey metricsKey, Long num) {
        if (!applicationNumStats.containsKey(metricsKey)) {
            return;
        }
        applicationNumStats.get(metricsKey).set(num);
    }

    public List export(MetricsCategory category) {
        List list = new ArrayList<>();
        for (MetricsKey type : applicationNumStats.keySet()) {
            list.add(convertToSample(type, category, applicationNumStats.get(type)));
        }
        return list;
    }

    @SuppressWarnings({"rawtypes"})
    private GaugeMetricSample convertToSample(MetricsKey type, MetricsCategory category, AtomicLong targetNumber) {
        return new GaugeMetricSample<>(
                type, MetricsSupport.applicationTags(getApplicationModel()), category, targetNumber, AtomicLong::get);
    }

    public Map getApplicationNumStats() {
        return applicationNumStats;
    }

    @Override
    public boolean calSamplesChanged() {
        // CAS to get and reset the flag in an atomic operation
        return samplesChanged.compareAndSet(true, false);
    }
}