io.micrometer.tracing.otel.bridge.CompositeSpanExporter Maven / Gradle / Ivy
/**
* Copyright 2022 the original author or 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
*
* https://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.micrometer.tracing.otel.bridge;
import io.micrometer.tracing.exporter.FinishedSpan;
import io.micrometer.tracing.exporter.SpanExportingPredicate;
import io.micrometer.tracing.exporter.SpanFilter;
import io.micrometer.tracing.exporter.SpanReporter;
import io.opentelemetry.sdk.common.CompletableResultCode;
import io.opentelemetry.sdk.trace.data.SpanData;
import io.opentelemetry.sdk.trace.export.SpanExporter;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;
/**
* Creates a {@link SpanExporter} with additional predicate, reporting and filtering
* logic.
*
* @author Marcin Grzejszczak
* @since 1.0.0
*/
public class CompositeSpanExporter implements io.opentelemetry.sdk.trace.export.SpanExporter {
private final Collection exporters;
private final List predicates;
private final List reporters;
private final List spanFilters;
/**
* Creates a new instance of {@link CompositeSpanExporter}.
* @param exporters {@link SpanExporter} exporters
* @param predicates predicates that decide which spans should be exported
* @param reporters reporters that export spans
* @param spanFilters filters that mutate spans before reporting them
*/
public CompositeSpanExporter(Collection exporters,
List predicates, List reporters, List spanFilters) {
this.exporters = exporters;
this.predicates = predicates == null ? Collections.emptyList() : predicates;
this.reporters = reporters == null ? Collections.emptyList() : reporters;
this.spanFilters = spanFilters == null ? Collections.emptyList() : spanFilters;
}
@Override
public CompletableResultCode export(Collection spans) {
List changedSpanData = spans.stream().filter(this::shouldProcess).map(spanData -> {
FinishedSpan finishedSpan = OtelFinishedSpan.fromOtel(spanData);
for (SpanFilter spanFilter : spanFilters) {
finishedSpan = spanFilter.map(finishedSpan);
}
return OtelFinishedSpan.toOtel(finishedSpan);
}).collect(Collectors.toList());
if (changedSpanData.isEmpty()) {
return CompletableResultCode.ofSuccess();
}
List results = new ArrayList<>();
changedSpanData.forEach(spanData -> {
this.reporters.forEach(reporter -> {
try {
reporter.report(OtelFinishedSpan.fromOtel(spanData));
results.add(CompletableResultCode.ofSuccess());
}
catch (Exception ex) {
results.add(CompletableResultCode.ofFailure());
}
});
});
this.exporters.forEach(spanExporter -> results.add(spanExporter.export(changedSpanData)));
return CompletableResultCode.ofAll(results);
}
private boolean shouldProcess(SpanData span) {
for (SpanExportingPredicate filter : this.predicates) {
if (!filter.isExportable(OtelFinishedSpan.fromOtel(span))) {
return false;
}
}
return true;
}
@Override
public CompletableResultCode flush() {
return CompletableResultCode
.ofAll(this.exporters.stream().map(SpanExporter::flush).collect(Collectors.toList()));
}
@Override
public CompletableResultCode shutdown() {
List results = new ArrayList<>();
for (SpanReporter reporter : this.reporters) {
try {
reporter.close();
results.add(CompletableResultCode.ofSuccess());
}
catch (Exception ex) {
results.add(CompletableResultCode.ofFailure());
}
}
results.addAll(this.exporters.stream().map(SpanExporter::shutdown).collect(Collectors.toList()));
return CompletableResultCode.ofAll(results);
}
}