Package com.yahoo.vespa.streamingvisitors

Class TracingOptions

java.lang.Object

com.yahoo.vespa.streamingvisitors.TracingOptions

public class TracingOptions
extends java.lang.Object

Encapsulates all trace-related components and options used by the streaming search Searcher. Provides a DEFAULT static instance which has the following characteristics: - Approximately 1 query every second is traced - Trace level is set to 7 for traced queries - Only emits traces for queries that have timed out and where the elapsed time is at least 2x of the timeout specified in the query itself - Emits traces to the Vespa log - Only 2 traces every 10 seconds may be emitted to the log

Field Summary

Fields

Modifier and Type	Field	Description
static TracingOptions	DEFAULT
static int	DEFAULT_TRACE_LEVEL_OVERRIDE
static double	TRACE_TIMEOUT_MULTIPLIER_THRESHOLD

Constructor Summary

Constructors

Constructor	Description
TracingOptions(SamplingStrategy samplingStrategy, TraceExporter traceExporter, MonotonicNanoClock clock, int traceLevelOverride, double traceTimeoutMultiplierThreshold)

Method Summary

Modifier and Type	Method	Description
MonotonicNanoClock	getClock()
SamplingStrategy	getSamplingStrategy()
TraceExporter	getTraceExporter()
int	getTraceLevelOverride()
double	getTraceTimeoutMultiplierThreshold()

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT

public static final TracingOptions DEFAULT

DEFAULT_TRACE_LEVEL_OVERRIDE

public static final int DEFAULT_TRACE_LEVEL_OVERRIDE

See Also:

Constant Field Values

TRACE_TIMEOUT_MULTIPLIER_THRESHOLD

public static final double TRACE_TIMEOUT_MULTIPLIER_THRESHOLD

See Also:

Constant Field Values

Constructor Detail

TracingOptions

public TracingOptions(SamplingStrategy samplingStrategy,
                      TraceExporter traceExporter,
                      MonotonicNanoClock clock,
                      int traceLevelOverride,
                      double traceTimeoutMultiplierThreshold)

Parameters:

samplingStrategy - used for choosing if a query should have its trace level implicitly altered.

traceExporter - used for emitting a visitor session trace to someplace it may be debugged later.

clock - monotonic clock used for relative time tracking.

traceLevelOverride - if a query is trace-sampled, its traceLevel will be set to this value

traceTimeoutMultiplierThreshold - only export traces if the elapsed time is greater than the query timeout * this value

Method Detail

getSamplingStrategy

public SamplingStrategy getSamplingStrategy()

getTraceExporter

public TraceExporter getTraceExporter()

getClock

public MonotonicNanoClock getClock()

getTraceLevelOverride

public int getTraceLevelOverride()

getTraceTimeoutMultiplierThreshold

public double getTraceTimeoutMultiplierThreshold()