io.bdeploy.jersey.monitoring.JerseyServerMonitoringSamplerService Maven / Gradle / Ivy

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Public API including dependencies, ready to be used for integrations and plugins.

There is a newer version: 7.3.6

package io.bdeploy.jersey.monitoring;

import java.util.ArrayList;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

import org.jvnet.hk2.annotations.Service;

import com.google.common.collect.EvictingQueue;

import io.bdeploy.common.util.NamedDaemonThreadFactory;
import jakarta.inject.Singleton;

@Service
@Singleton
public class JerseyServerMonitoringSamplerService {

    private static final int MAX_SNAPSHOTS = 1 * 60; // every minute, 60 samples

    private final ScheduledExecutorService sampler;
    private final EvictingQueue snapshots = EvictingQueue.create(MAX_SNAPSHOTS);

    private final JerseyServerMonitor monitor;

    public JerseyServerMonitoringSamplerService(JerseyServerMonitor monitor) {
        this.monitor = monitor;
        sampler = Executors.newSingleThreadScheduledExecutor(new NamedDaemonThreadFactory("Monitoring Sampler"));
        sampler.scheduleAtFixedRate(this::performSnapshot, 0, 1, TimeUnit.MINUTES);
    }

    private void performSnapshot() {
        if (monitor != null) {
            snapshots.add(monitor.getSnapshot());
        }
    }

    public JerseyServerMonitoringDto getSamples() {
        JerseyServerMonitoringDto dto = new JerseyServerMonitoringDto();
        dto.snapshots = new ArrayList<>(snapshots);
        return dto;
    }

}