/*
 * 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.skywalking.apm.collector.analysis.jvm.provider.service;

import org.apache.skywalking.apm.collector.analysis.jvm.define.graph.GraphIdDefine;
import org.apache.skywalking.apm.collector.analysis.jvm.define.service.ICpuMetricService;
import org.apache.skywalking.apm.collector.core.graph.Graph;
import org.apache.skywalking.apm.collector.core.graph.GraphManager;
import org.apache.skywalking.apm.collector.core.util.Const;
import org.apache.skywalking.apm.collector.core.util.ObjectUtils;
import org.apache.skywalking.apm.collector.storage.table.jvm.CpuMetric;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author peng-yongsheng
 */
public class CpuMetricService implements ICpuMetricService {

    private final Logger logger = LoggerFactory.getLogger(CpuMetricService.class);

    private Graph<CpuMetric> cpuMetricGraph;

    private Graph<CpuMetric> getCpuMetricGraph() {
        if (ObjectUtils.isEmpty(cpuMetricGraph)) {
            cpuMetricGraph = GraphManager.INSTANCE.findGraph(GraphIdDefine.CPU_METRIC_PERSISTENCE_GRAPH_ID, CpuMetric.class);
        }
        return cpuMetricGraph;
    }

    @Override public void send(int instanceId, long timeBucket, double usagePercent) {
        String metricId = String.valueOf(instanceId);
        String id = timeBucket + Const.ID_SPLIT + metricId;

        CpuMetric cpuMetric = new CpuMetric();
        cpuMetric.setId(id);
        cpuMetric.setMetricId(metricId);
        cpuMetric.setInstanceId(instanceId);
        cpuMetric.setUsagePercent(usagePercent);
        cpuMetric.setTimes(1L);
        cpuMetric.setTimeBucket(timeBucket);

        logger.debug("push to cpu metric graph, id: {}", cpuMetric.getId());
        getCpuMetricGraph().start(cpuMetric);
    }
}
