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/*
* Copyright 2018, 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.trace.export;
import io.opencensus.implcore.trace.RecordEventsSpanImpl;
import io.opencensus.implcore.trace.internal.ConcurrentIntrusiveList;
import io.opencensus.trace.export.RunningSpanStore;
import io.opencensus.trace.export.SpanData;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.annotation.concurrent.ThreadSafe;
/** In-process implementation of the {@link RunningSpanStore}. */
@ThreadSafe
public final class InProcessRunningSpanStoreImpl extends RunningSpanStoreImpl {
private final ConcurrentIntrusiveList<RecordEventsSpanImpl> runningSpans;
public InProcessRunningSpanStoreImpl() {
runningSpans = new ConcurrentIntrusiveList<RecordEventsSpanImpl>();
}
@Override
public void onStart(RecordEventsSpanImpl span) {
runningSpans.addElement(span);
}
@Override
public void onEnd(RecordEventsSpanImpl span) {
runningSpans.removeElement(span);
}
@Override
public Summary getSummary() {
Collection<RecordEventsSpanImpl> allRunningSpans = runningSpans.getAll();
Map<String, Integer> numSpansPerName = new HashMap<String, Integer>();
for (RecordEventsSpanImpl span : allRunningSpans) {
Integer prevValue = numSpansPerName.get(span.getName());
numSpansPerName.put(span.getName(), prevValue != null ? prevValue + 1 : 1);
}
Map<String, PerSpanNameSummary> perSpanNameSummary = new HashMap<String, PerSpanNameSummary>();
for (Map.Entry<String, Integer> it : numSpansPerName.entrySet()) {
perSpanNameSummary.put(it.getKey(), PerSpanNameSummary.create(it.getValue()));
}
Summary summary = Summary.create(perSpanNameSummary);
return summary;
}
@Override
public Collection<SpanData> getRunningSpans(Filter filter) {
Collection<RecordEventsSpanImpl> allRunningSpans = runningSpans.getAll();
int maxSpansToReturn =
filter.getMaxSpansToReturn() == 0 ? allRunningSpans.size() : filter.getMaxSpansToReturn();
List<SpanData> ret = new ArrayList<SpanData>(maxSpansToReturn);
for (RecordEventsSpanImpl span : allRunningSpans) {
if (ret.size() == maxSpansToReturn) {
break;
}
if (span.getName().equals(filter.getSpanName())) {
ret.add(span.toSpanData());
}
}
return ret;
}
}
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