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/*
* Copyright (C) 2013, 2014 Brett Wooldridge
*
* Licensed 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 com.zaxxer.hikari.metrics.prometheus;
import com.zaxxer.hikari.metrics.PoolStats;
import io.prometheus.client.Collector;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
class HikariCPCollector extends Collector {
private final PoolStats poolStats;
private final List<String> labelNames;
private final List<String> labelValues;
HikariCPCollector(String poolName, PoolStats poolStats) {
this.poolStats = poolStats;
this.labelNames = Collections.singletonList("pool");
this.labelValues = Collections.singletonList(poolName);
}
@Override
public List<MetricFamilySamples> collect() {
return Arrays.asList(
createSample("hikaricp_active_connections", "Active connections", poolStats.getActiveConnections()),
createSample("hikaricp_idle_connections", "Idle connections", poolStats.getIdleConnections()),
createSample("hikaricp_pending_threads", "Pending threads", poolStats.getPendingThreads()),
createSample("hikaricp_connections", "The number of current connections", poolStats.getTotalConnections())
);
}
private MetricFamilySamples createSample(String name, String helpMessage, double value)
{
List<MetricFamilySamples.Sample> samples = Collections.singletonList(
new MetricFamilySamples.Sample(name, labelNames, labelValues, value)
);
return new MetricFamilySamples(name, Type.GAUGE, helpMessage, samples);
}
}
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