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51 changes: 51 additions & 0 deletions
51
src/main/java/io/opentracing/contrib/grpc/ActiveSpanContextSource.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| /* | ||
| * Copyright 2017-2018 The OpenTracing 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.opentracing.contrib.grpc; | ||
|
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| import io.opentracing.SpanContext; | ||
|
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| /** | ||
| * An interface that defines how to get the current active span context | ||
| */ | ||
| public interface ActiveSpanContextSource { | ||
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| /** | ||
| * ActiveSpanContextSource implementation that always returns | ||
| * null as the active span context | ||
| */ | ||
| ActiveSpanContextSource NONE = new ActiveSpanContextSource() { | ||
| @Override | ||
| public SpanContext getActiveSpanContext() { | ||
| return null; | ||
| } | ||
| }; | ||
|
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| /** | ||
| * ActiveSpanContextSource implementation that returns the | ||
| * current span context stored in the GRPC context under | ||
| * {@link OpenTracingContextKey} | ||
| */ | ||
| ActiveSpanContextSource GRPC_CONTEXT = new ActiveSpanContextSource() { | ||
| @Override | ||
| public SpanContext getActiveSpanContext() { | ||
| return OpenTracingContextKey.activeSpanContext(); | ||
| } | ||
| }; | ||
|
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| /** | ||
| * @return the active span context | ||
| */ | ||
| SpanContext getActiveSpanContext(); | ||
|
|
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| } |
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70 changes: 70 additions & 0 deletions
70
src/test/java/io/opentracing/contrib/grpc/ActiveSpanContextSourceTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| /* | ||
| * Copyright 2017-2018 The OpenTracing 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.opentracing.contrib.grpc; | ||
|
|
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| import static org.junit.Assert.assertEquals; | ||
| import static org.junit.Assert.assertNull; | ||
|
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| import io.grpc.Context; | ||
| import io.opentracing.Span; | ||
| import io.opentracing.mock.MockTracer; | ||
| import org.junit.Before; | ||
| import org.junit.Test; | ||
|
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| public class ActiveSpanContextSourceTest { | ||
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| private final MockTracer tracer = new MockTracer(); | ||
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| @Before | ||
| public void before() { | ||
| tracer.reset(); | ||
| } | ||
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| @Test | ||
| public void TestDefaultNone() { | ||
| ActiveSpanContextSource ss = ActiveSpanContextSource.NONE; | ||
| assertNull("active span context should always be null", ss.getActiveSpanContext()); | ||
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| Span span = tracer.buildSpan("s0").start(); | ||
| Context ctx = Context.current().withValue(OpenTracingContextKey.getKey(), span); | ||
| Context previousCtx = ctx.attach(); | ||
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| assertNull("active span context should always be null", ss.getActiveSpanContext()); | ||
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| ctx.detach(previousCtx); | ||
| span.finish(); | ||
| } | ||
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| @Test | ||
| public void TestDefaultGrpc() { | ||
| ActiveSpanContextSource ss = ActiveSpanContextSource.GRPC_CONTEXT; | ||
| assertNull("active span context should be null, no span context in OpenTracingContextKey", | ||
| ss.getActiveSpanContext()); | ||
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| Span span = tracer.buildSpan("s0").start(); | ||
| Context ctx = Context.current() | ||
| .withValue(OpenTracingContextKey.getSpanContextKey(), span.context()); | ||
| Context previousCtx = ctx.attach(); | ||
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| assertEquals("active span context should be OpenTracingContextKey.activeSpanContext()", | ||
| ss.getActiveSpanContext(), span.context()); | ||
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| ctx.detach(previousCtx); | ||
| span.finish(); | ||
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| assertNull("active span context should be null, no span context in OpenTracingContextKey", | ||
| ss.getActiveSpanContext()); | ||
| } | ||
|
|
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| } |
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