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/*
* Copyright 2017, Google Inc.
* 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.impl.stats;
import io.opencensus.common.Clock;
import io.opencensus.impl.internal.EventQueue;
import io.opencensus.stats.MeasureMap;
import io.opencensus.stats.View;
import io.opencensus.stats.ViewData;
import io.opencensus.tags.TagContext;
/** Object that stores all views and stats. */
final class StatsManager {
private final EventQueue queue;
// clock used throughout the stats implementation
private final Clock clock;
private final MeasureToViewMap measureToViewMap = new MeasureToViewMap();
StatsManager(EventQueue queue, Clock clock) {
this.queue = queue;
this.clock = clock;
}
void registerView(View view) {
if (view.getWindow() instanceof View.Window.Interval) {
throw new UnsupportedOperationException("IntervalView not supported yet.");
}
measureToViewMap.registerView(view, clock);
}
ViewData getView(View.Name viewName) {
ViewData view = measureToViewMap.getView(viewName, clock);
if (view == null) {
throw new IllegalArgumentException(
"ViewData for view " + viewName + " not found.");
} else {
return view;
}
}
void record(TagContext tags, MeasureMap measurementValues) {
queue.enqueue(new StatsEvent(this, tags, measurementValues));
}
// An EventQueue entry that records the stats from one call to StatsManager.record(...).
private static final class StatsEvent implements EventQueue.Entry {
private final TagContext tags;
private final MeasureMap stats;
private final StatsManager viewManager;
StatsEvent(StatsManager viewManager, TagContext tags, MeasureMap stats) {
this.viewManager = viewManager;
this.tags = tags;
this.stats = stats;
}
@Override
public void process() {
viewManager.measureToViewMap.record(tags, stats);
}
}
}
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