io.opentracing.propagation

Interface HttpHeaderReader

public interface HttpHeaderReader

HttpHeaderReader is a built-in carrier for Tracer.inject(). HttpHeaderReader implementations allows Tracers to write key:value String pairs into arbitrary HTTP header representations. In this way, HttpHeaderReader prevents a tight coupling between OpenTracing and any particular Java HTTP Header representation.

See Also:

Tracer.extract(Object)

Method Summary

Modifier and Type	Method and Description
Iterator<Map.Entry<String,String>>	getEntries() Gets HTTP headers from the implementations backing store.

Method Detail

getEntries

Iterator<Map.Entry<String,String>> getEntries()

Gets HTTP headers from the implementations backing store. Note that these headers will often be a superset of whatever was injected via an HttpHeaderWriter in the peer. As such, Tracers should use a unique prefix or substring to identify their header map entries.

Returns:

all entries in the HTTP header map; note that keys may appear multiple times (just as they may with HTTP headers)

See Also:

Tracer.extract(Object)