com.flipkart.poseidon.tracing

Class ServletTraceFilterBuilder

java.lang.Object

com.flipkart.poseidon.tracing.ServletTraceFilterBuilder

public class ServletTraceFilterBuilder
extends Object

ServletTraceFilterBuilder builds a ServletTraceFilter which is a jetty filter provided by phantom runtime, to kick start distributed tracing for every request. Spans are emitted to the zipkin collector based on config which is controlled by DynamicSampleRateTraceFilter.

Distributed Tracing by default on prod adds almost NILL overhead. The plan is to enable it per host on need basis dynamically without restarting Posidon application which will add a minor overhead of config lookups, sampling counter lock, logs at Poseidon threads and minor overhead at phantom threads (which is not yet measured). Actual spans and traces are pushed to Zipkin Collector asynchronously (memory requirements are also not measured yet). Expectation is to enable tracing for a brief period for a set of required URLs on one host and turn it off asap.

Version:

1.0, 15th Jul, 2015

Author:

Mohan Kumar Pandian

Constructor Summary

Constructors

Constructor and Description
ServletTraceFilterBuilder()

Method Summary

Modifier and Type	Method and Description
static com.flipkart.phantom.runtime.impl.jetty.filter.ServletTraceFilter	build(Configuration configuration)

Methods inherited from class java.lang.Object

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

Constructor Detail

ServletTraceFilterBuilder

public ServletTraceFilterBuilder()

Method Detail

build

public static com.flipkart.phantom.runtime.impl.jetty.filter.ServletTraceFilter build(Configuration configuration)