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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.trace.unsafe;
import io.grpc.Context;
import io.opencensus.trace.Span;
/*>>>
import org.checkerframework.checker.nullness.qual.Nullable;
*/
/**
* Util methods/functionality to interact with the {@link io.grpc.Context}.
*
* <p>Users must interact with the current Context via the public APIs in {@link
* io.opencensus.trace.Tracer} and avoid usages of the {@link #CONTEXT_SPAN_KEY} directly.
*
* @since 0.5
*/
public final class ContextUtils {
// No instance of this class.
private ContextUtils() {}
/**
* The {@link io.grpc.Context.Key} used to interact with {@link io.grpc.Context}.
*
* @since 0.5
*/
public static final Context.Key</*@Nullable*/ Span> CONTEXT_SPAN_KEY =
Context.key("opencensus-trace-span-key");
}
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