/
InMemorySpanExporter.java
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/
InMemorySpanExporter.java
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/*
* Copyright (c) 2016-2022 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* 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 org.eclipse.microprofile.telemetry.tracing.tck.exporter;
import static java.util.Comparator.comparingLong;
import static java.util.concurrent.TimeUnit.SECONDS;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.stream.Collectors;
import org.awaitility.Awaitility;
import org.junit.jupiter.api.Assertions;
import io.opentelemetry.sdk.common.CompletableResultCode;
import io.opentelemetry.sdk.trace.data.SpanData;
import io.opentelemetry.sdk.trace.export.SpanExporter;
import jakarta.enterprise.context.ApplicationScoped;
@ApplicationScoped
public class InMemorySpanExporter implements SpanExporter {
private boolean isStopped = false;
private final List<SpanData> finishedSpanItems = new CopyOnWriteArrayList<>();
/**
* Careful when retrieving the list of finished spans. There is a chance when the response is already sent to the
* client and the server still writing the end of the spans. This means that a response is available to assert from
* the test side but not all spans may be available yet. For this reason, this method requires the number of
* expected spans.
*/
public List<SpanData> getFinishedSpanItems(int spanCount) {
assertSpanCount(spanCount);
return finishedSpanItems.stream().sorted(comparingLong(SpanData::getStartEpochNanos).reversed())
.collect(Collectors.toList());
}
public void assertSpanCount(int spanCount) {
Awaitility.await().atMost(10, SECONDS)
.untilAsserted(() -> Assertions.assertEquals(spanCount, finishedSpanItems.size()));
}
public void reset() {
finishedSpanItems.clear();
}
@Override
public CompletableResultCode export(Collection<SpanData> spans) {
if (isStopped) {
return CompletableResultCode.ofFailure();
}
finishedSpanItems.addAll(spans);
return CompletableResultCode.ofSuccess();
}
@Override
public CompletableResultCode flush() {
return CompletableResultCode.ofSuccess();
}
@Override
public CompletableResultCode shutdown() {
finishedSpanItems.clear();
isStopped = true;
return CompletableResultCode.ofSuccess();
}
}