io.dapr.internal.opencensus.SpanContext Maven / Gradle / Ivy
/*
* Copyright 2021 The Dapr 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.dapr.internal.opencensus;
import javax.annotation.concurrent.Immutable;
import java.util.Arrays;
/**
* A class that represents a span context. A span context contains the state that must propagate to
* child Spans and across process boundaries. It contains the identifiers (a {@link TraceId
* trace_id} and {@link SpanId span_id}) associated with the and a set of {@link
* TraceOptions options}.
*
* Code originally from https://github.com/census-instrumentation/opencensus-java/blob/
* 446e9bde9b1f6c0317e3f310644997e5d6d5eab2/api/src/main/java/io/opencensus/trace/SpanContext.java
* @since 0.5
*/
@Immutable
final class SpanContext {
private final TraceId traceId;
private final SpanId spanId;
private final TraceOptions traceOptions;
private final Tracestate tracestate;
/**
* Creates a new {@code SpanContext} with the given identifiers and options.
*
* @param traceId the trace identifier of the span context.
* @param spanId the span identifier of the span context.
* @param traceOptions the trace options for the span context.
* @param tracestate the trace state for the span context.
* @return a new {@code SpanContext} with the given identifiers and options.
* @since 0.16
*/
static SpanContext create(
TraceId traceId, SpanId spanId, TraceOptions traceOptions, Tracestate tracestate) {
return new SpanContext(traceId, spanId, traceOptions, tracestate);
}
/**
* Returns the trace identifier associated with this {@code SpanContext}.
*
* @return the trace identifier associated with this {@code SpanContext}.
* @since 0.5
*/
TraceId getTraceId() {
return traceId;
}
/**
* Returns the span identifier associated with this {@code SpanContext}.
*
* @return the span identifier associated with this {@code SpanContext}.
* @since 0.5
*/
SpanId getSpanId() {
return spanId;
}
/**
* Returns the {@code TraceOptions} associated with this {@code SpanContext}.
*
* @return the {@code TraceOptions} associated with this {@code SpanContext}.
* @since 0.5
*/
TraceOptions getTraceOptions() {
return traceOptions;
}
/**
* Returns the {@code Tracestate} associated with this {@code SpanContext}.
*
* @return the {@code Tracestate} associated with this {@code SpanContext}.
* @since 0.5
*/
Tracestate getTracestate() {
return tracestate;
}
/**
* Returns true if this {@code SpanContext} is valid.
*
* @return true if this {@code SpanContext} is valid.
* @since 0.5
*/
boolean isValid() {
return traceId.isValid() && spanId.isValid();
}
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (obj == this) {
return true;
}
if (!(obj instanceof SpanContext)) {
return false;
}
SpanContext that = (SpanContext) obj;
return traceId.equals(that.traceId)
&& spanId.equals(that.spanId)
&& traceOptions.equals(that.traceOptions);
}
@Override
public int hashCode() {
return Arrays.hashCode(new Object[]{traceId, spanId, traceOptions});
}
private SpanContext(
TraceId traceId, SpanId spanId, TraceOptions traceOptions, Tracestate tracestate) {
this.traceId = traceId;
this.spanId = spanId;
this.traceOptions = traceOptions;
this.tracestate = tracestate;
}
}