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opentelemetry-java
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Change Tracer to not implement any method.

This commit is contained in:
Bogdan Drutu 2019-03-27 08:06:24 -07:00
parent bb3c3c35d9
commit 59790e7f22
1 changed files with 32 additions and 17 deletions
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49
api/src/main/java/openconsensus/trace/Tracer.java
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@ -20,7 +20,7 @@ import com.google.errorprone.annotations.MustBeClosed;
import java.util.concurrent.Callable;
import javax.annotation.Nullable;
import openconsensus.common.Scope;
import openconsensus.internal.Utils;
import openconsensus.internal.NoopScope;
import openconsensus.trace.SpanBuilder.NoopSpanBuilder;
import openconsensus.trace.data.Status;
@ -95,10 +95,7 @@ public abstract class Tracer {
* from the Context.
* @since 0.1.0
*/
public final Span getCurrentSpan() {
Span currentSpan = CurrentSpanUtils.getCurrentSpan();
return currentSpan != null ? currentSpan : BlankSpan.INSTANCE;
}
public abstract Span getCurrentSpan();
/**
* Enters the scope of code where the given {@link Span} is in the current Context, and returns an
@ -151,9 +148,7 @@ public abstract class Tracer {
* @since 0.1.0
*/
@MustBeClosed
public final Scope withSpan(Span span) {
return CurrentSpanUtils.withSpan(Utils.checkNotNull(span, "span"), /* endSpan= */ false);
}
public abstract Scope withSpan(Span span);
/**
* Returns a {@link Runnable} that runs the given task with the given {@code Span} in the current
@ -216,9 +211,7 @@ public abstract class Tracer {
* @return the {@code Runnable}.
* @since 0.1.0
*/
public final Runnable withSpan(Span span, Runnable runnable) {
return CurrentSpanUtils.withSpan(span, /* endSpan= */ false, runnable);
}
public abstract Runnable withSpan(Span span, Runnable runnable);
/**
* Returns a {@link Callable} that runs the given task with the given {@code Span} in the current
@ -278,12 +271,11 @@ public abstract class Tracer {
*
* @param span the {@code Span} to be set as current.
* @param callable the {@code Callable} to run in the {@code Span}.
* @param <V> the result type of method call.
* @return the {@code Callable}.
* @since 0.1.0
*/
public final <C> Callable<C> withSpan(Span span, final Callable<C> callable) {
return CurrentSpanUtils.withSpan(span, /* endSpan= */ false, callable);
}
public abstract <V> Callable<V> withSpan(Span span, final Callable<V> callable);
/**
* Returns a {@link SpanBuilder} to create and start a new child {@link Span} as a child of to the
@ -305,9 +297,7 @@ public abstract class Tracer {
* @throws NullPointerException if {@code spanName} is {@code null}.
* @since 0.1.0
*/
public final SpanBuilder spanBuilder(String spanName) {
return spanBuilderWithExplicitParent(spanName, CurrentSpanUtils.getCurrentSpan());
}
public abstract SpanBuilder spanBuilder(String spanName);
/**
* Returns a {@link SpanBuilder} to create and start a new child {@link Span} (or root if parent
@ -353,6 +343,31 @@ public abstract class Tracer {
// No-Op implementation of the Tracer.
private static final class NoopTracer extends Tracer {
@Override
public Span getCurrentSpan() {
return BlankSpan.INSTANCE;
}
@Override
public Scope withSpan(Span span) {
return NoopScope.getInstance();
}
@Override
public Runnable withSpan(Span span, Runnable runnable) {
return runnable;
}
@Override
public <C> Callable<C> withSpan(Span span, Callable<C> callable) {
return callable;
}
@Override
public SpanBuilder spanBuilder(String spanName) {
return spanBuilderWithExplicitParent(spanName, getCurrentSpan());
}
@Override
public SpanBuilder spanBuilderWithExplicitParent(String spanName, @Nullable Span parent) {
return NoopSpanBuilder.createWithParent(spanName, parent);