org.springframework.cloud.gcp.logging.extractors

Class XCloudTraceIdExtractor

java.lang.Object

org.springframework.cloud.gcp.logging.extractors.XCloudTraceIdExtractor

All Implemented Interfaces:

TraceIdExtractor

Direct Known Subclasses:

XCloudTraceIdExtractor

public class XCloudTraceIdExtractor
extends Object
implements TraceIdExtractor

Extracts trace IDs from HTTP requests using the x-cloud-trace-context header.

Author:

Chengyuan Zhao

Field Summary

Fields

Modifier and Type	Field and Description
static String	X_CLOUD_TRACE_HEADER The name of the header that contains the trace id.

Constructor Summary

Constructors

Constructor and Description
XCloudTraceIdExtractor()

Method Summary

Modifier and Type	Method and Description
String	extractTraceIdFromRequest(javax.servlet.http.HttpServletRequest req) Extract trace ID from the HTTP request.

Methods inherited from class java.lang.Object

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

Field Detail

X_CLOUD_TRACE_HEADER

public static final String X_CLOUD_TRACE_HEADER

The name of the header that contains the trace id.

See Also:

Constant Field Values

Constructor Detail

XCloudTraceIdExtractor

public XCloudTraceIdExtractor()

Method Detail

extractTraceIdFromRequest

public String extractTraceIdFromRequest(javax.servlet.http.HttpServletRequest req)

Description copied from interface: TraceIdExtractor

Extract trace ID from the HTTP request.

Specified by:

extractTraceIdFromRequest in interface TraceIdExtractor

Parameters:

req - the HTTP servlet request.

Returns:

the trace ID or null, if none found.