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// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.concurrent.maintenance;
import java.time.Clock;
import java.time.Instant;
import java.util.Map;
import java.util.Objects;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.BiConsumer;
/**
* Tracks and forwards maintenance job metrics.
*
* @author mpolden
*/
public class JobMetrics {
private final Clock clock;
private final BiConsumer<String, Instant> metricConsumer;
private final Map<String, Instant> successfulRuns = new ConcurrentHashMap<>();
public JobMetrics(Clock clock, BiConsumer<String, Instant> metricConsumer) {
this.clock = Objects.requireNonNull(clock);
this.metricConsumer = metricConsumer;
}
/** Record successful run of given job */
public void recordSuccessOf(String job) {
successfulRuns.put(job, clock.instant());
}
/** Forward metrics for given job to metric consumer */
public void forward(String job) {
Instant lastSuccess = successfulRuns.get(job);
if (lastSuccess != null) {
metricConsumer.accept(job, lastSuccess);
}
}
}
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