/*
* 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.sirona.store.gauge;
import org.apache.sirona.Role;
import org.apache.sirona.configuration.Configuration;
import org.apache.sirona.configuration.ioc.Created;
import org.apache.sirona.configuration.ioc.Destroying;
import org.apache.sirona.gauges.Gauge;
import org.apache.sirona.gauges.GaugeDataStoreAdapter;
import org.apache.sirona.store.BatchFuture;
import org.apache.sirona.util.DaemonThreadFactory;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import java.util.logging.Level;
import java.util.logging.Logger;
public abstract class BatchGaugeDataStoreAdapter extends GaugeDataStoreAdapter {
private static final Logger LOGGER = Logger.getLogger(BatchGaugeDataStoreAdapter.class.getName());
protected BatchFuture scheduledTask;
@Created // call it only when main impl not in delegated mode so use IoC lifecycle management
public void initBatch() {
final String name = getClass().getSimpleName().toLowerCase(Locale.ENGLISH).replace("gaugedatastore", "");
final long period = getPeriod(name);
final ScheduledExecutorService ses = Executors.newSingleThreadScheduledExecutor(new DaemonThreadFactory(name + "-gauge-schedule-"));
final ScheduledFuture<?> future = ses.scheduleAtFixedRate(new PushGaugesTask(), period, period, TimeUnit.MILLISECONDS);
scheduledTask = new BatchFuture(ses, future);
}
protected int getPeriod(final String name) {
return Configuration.getInteger(Configuration.CONFIG_PROPERTY_PREFIX + name + ".gauge.period",
Configuration.getInteger(Configuration.CONFIG_PROPERTY_PREFIX + name + ".period", 60000));
}
@Destroying
public void shutdown() {
scheduledTask.done();
}
protected abstract void pushGauges(final Map<Role, Measure> gauges);
protected Map<Role, Measure> snapshot() {
final long ts = System.currentTimeMillis();
final Map<Role, Measure> snapshot = new HashMap<Role, Measure>();
for (final Gauge gauge : gauges.values()) {
final Role role = gauge.role();
final double value = gauge.value();
addToGauge(role, ts, value);
snapshot.put(role, new Measure(ts, value));
}
return snapshot;
}
private class PushGaugesTask implements Runnable {
@Override
public void run() {
try {
pushGauges(snapshot());
} catch (final Exception e) {
LOGGER.log(Level.SEVERE, e.getMessage(), e);
}
}
}
public static class Measure {
private long time;
private double value;
private Measure(final long time, final double value) {
this.time = time;
this.value = value;
}
public long getTime() {
return time;
}
public double getValue() {
return value;
}
@Override
public String toString() {
return "Measure{" +
"time=" + time +
", value=" + value +
'}';
}
}
}