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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.trace;
import io.opencensus.common.Clock;
import io.opencensus.implcore.internal.EventQueue;
import io.opencensus.implcore.internal.SimpleEventQueue;
import io.opencensus.implcore.trace.SpanImpl.StartEndHandler;
import io.opencensus.implcore.trace.config.TraceConfigImpl;
import io.opencensus.implcore.trace.export.ExportComponentImpl;
import io.opencensus.implcore.trace.internal.RandomHandler;
import io.opencensus.implcore.trace.propagation.PropagationComponentImpl;
import io.opencensus.trace.TraceComponent;
import io.opencensus.trace.Tracer;
import io.opencensus.trace.config.TraceConfig;
import io.opencensus.trace.export.ExportComponent;
import io.opencensus.trace.propagation.PropagationComponent;
/**
* Helper class to allow sharing the code for all the {@link TraceComponent} implementations. This
* class cannot use inheritance because in version 0.5.* the constructor of the {@code
* TraceComponent} is package protected.
*
* <p>This can be changed back to inheritance when version 0.5.* is no longer supported.
*/
public final class TraceComponentImplBase {
private final ExportComponentImpl exportComponent;
private final PropagationComponent propagationComponent = new PropagationComponentImpl();
private final Clock clock;
private final TraceConfig traceConfig = new TraceConfigImpl();
private final Tracer tracer;
/**
* Creates a new {@code TraceComponentImplBase}.
*
* @param clock the clock to use throughout tracing.
* @param randomHandler the random number generator for generating trace and span IDs.
* @param eventQueue the queue implementation.
*/
public TraceComponentImplBase(Clock clock, RandomHandler randomHandler, EventQueue eventQueue) {
this.clock = clock;
// TODO(bdrutu): Add a config/argument for supportInProcessStores.
if (eventQueue instanceof SimpleEventQueue) {
exportComponent = ExportComponentImpl.createWithoutInProcessStores(eventQueue);
} else {
exportComponent = ExportComponentImpl.createWithInProcessStores(eventQueue);
}
StartEndHandler startEndHandler =
new StartEndHandlerImpl(
exportComponent.getSpanExporter(),
exportComponent.getRunningSpanStore(),
exportComponent.getSampledSpanStore(),
eventQueue);
tracer = new TracerImpl(randomHandler, startEndHandler, clock, traceConfig);
}
public Tracer getTracer() {
return tracer;
}
public PropagationComponent getPropagationComponent() {
return propagationComponent;
}
public final Clock getClock() {
return clock;
}
public ExportComponent getExportComponent() {
return exportComponent;
}
public TraceConfig getTraceConfig() {
return traceConfig;
}
}
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