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/*
* Copyright 2017, OpenCensus Authors
*
* 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 io.opencensus.implcore.stats;
import com.google.common.base.Preconditions;
import io.opencensus.common.Clock;
import io.opencensus.implcore.internal.EventQueue;
import io.opencensus.metrics.MetricProducer;
import io.opencensus.metrics.Metrics;
import io.opencensus.stats.StatsCollectionState;
import io.opencensus.stats.StatsComponent;
/** Base implementation of {@link StatsComponent}. */
public class StatsComponentImplBase extends StatsComponent {
// The StatsCollectionState shared between the StatsComponent, StatsRecorder and ViewManager.
private final CurrentStatsState state = new CurrentStatsState();
private final ViewManagerImpl viewManager;
private final StatsRecorderImpl statsRecorder;
/**
* Creates a new {@code StatsComponentImplBase}.
*
* @param queue the queue implementation.
* @param clock the clock to use when recording stats.
*/
public StatsComponentImplBase(EventQueue queue, Clock clock) {
StatsManager statsManager = new StatsManager(queue, clock, state);
this.viewManager = new ViewManagerImpl(statsManager);
this.statsRecorder = new StatsRecorderImpl(statsManager);
// Create a new MetricProducerImpl and register it to MetricProducerManager when
// StatsComponentImplBase is initialized.
MetricProducer metricProducer = new MetricProducerImpl(statsManager);
Metrics.getExportComponent().getMetricProducerManager().add(metricProducer);
}
@Override
public ViewManagerImpl getViewManager() {
return viewManager;
}
@Override
public StatsRecorderImpl getStatsRecorder() {
return statsRecorder;
}
@Override
public StatsCollectionState getState() {
return state.get();
}
@Override
@SuppressWarnings("deprecation")
public synchronized void setState(StatsCollectionState newState) {
boolean stateChanged = state.set(Preconditions.checkNotNull(newState, "newState"));
if (stateChanged) {
if (newState == StatsCollectionState.DISABLED) {
viewManager.clearStats();
} else {
viewManager.resumeStatsCollection();
}
}
}
}
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