com.uber.jaeger.propagation

Class CompositeCodec<T>

java.lang.Object

com.uber.jaeger.propagation.CompositeCodec<T>

All Implemented Interfaces:

Codec<T>, Extractor<T>, Injector<T>

public class CompositeCodec<T>
extends java.lang.Object
implements Codec<T>

Constructor Summary

Constructors

Constructor and Description
CompositeCodec(java.util.List<Codec<T>> codecs)

Method Summary

Modifier and Type	Method and Description
SpanContext	extract(T carrier) Called when Tracer.extract(...) is used.
void	inject(SpanContext spanContext, T carrier) Called when Tracer.inject(...) is used.
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

CompositeCodec

public CompositeCodec(java.util.List<Codec<T>> codecs)

Method Detail

inject

public void inject(SpanContext spanContext,
                   T carrier)

Description copied from interface: Injector

Called when Tracer.inject(...) is used. It should handle the logic behind injecting propagation scheme specific information into the carrier (e.g. http request headers, amqp message headers, etc.).

All exceptions thrown from this method will be caught and logged on ERROR level so that business code execution isn't affected. If possible, catch implementation specific exceptions and log more meaningful information.

Specified by:

inject in interface Injector<T>

Parameters:

spanContext - span context that should be used to pass trace information with the carrier

carrier - holder of data that is used to pass tracing information between processes

See Also:

B3TextMapCodec, TextMapCodec

extract

public SpanContext extract(T carrier)

Description copied from interface: Extractor

Called when Tracer.extract(...) is used. It should handle the logic behind extracting propagation-scheme specific information from carrier (e.g. http request headers, amqp message headers, etc.).

This method must not modify the carrier

All exceptions thrown from this method will be caught and logged on WARN level so that business code execution isn't affected. If possible, catch implementation specific exceptions and log more meaningful information.

Specified by:

extract in interface Extractor<T>

Parameters:

carrier - input that you extract Span information from, usually TextMap.

Returns:

SpanContext or null if carrier doesn't contain tracing information, it is not valid or is incomplete

See Also:

B3TextMapCodec, TextMapCodec

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object