org.apache.solr.util.stats

Class InstrumentedHttpRequestExecutor

java.lang.Object

org.apache.http.protocol.HttpRequestExecutor

org.apache.solr.util.stats.InstrumentedHttpRequestExecutor

All Implemented Interfaces:

AutoCloseable, SolrMetricProducer

public class InstrumentedHttpRequestExecutor
extends org.apache.http.protocol.HttpRequestExecutor
implements SolrMetricProducer

Sub-class of HttpRequestExecutor which tracks metrics interesting to solr Inspired and partially copied from dropwizard httpclient library

Field Summary

Fields

Modifier and Type	Field and Description
static HttpClientMetricNameStrategy	HOST_AND_METHOD
static Map<String,HttpClientMetricNameStrategy>	KNOWN_METRIC_NAME_STRATEGIES
static HttpClientMetricNameStrategy	METHOD_ONLY
protected SolrMetricManager	metricManager
protected com.codahale.metrics.MetricRegistry	metricsRegistry
protected HttpClientMetricNameStrategy	nameStrategy
static HttpClientMetricNameStrategy	QUERYLESS_URL_AND_METHOD
protected String	registryName
protected String	scope

Fields inherited from class org.apache.http.protocol.HttpRequestExecutor

DEFAULT_WAIT_FOR_CONTINUE

Constructor Summary

Constructors

Constructor and Description
InstrumentedHttpRequestExecutor(HttpClientMetricNameStrategy nameStrategy)
InstrumentedHttpRequestExecutor(int waitForContinue, HttpClientMetricNameStrategy nameStrategy)

Method Summary

Modifier and Type	Method and Description
org.apache.http.HttpResponse	execute(org.apache.http.HttpRequest request, org.apache.http.HttpClientConnection conn, org.apache.http.protocol.HttpContext context)
void	initializeMetrics(SolrMetricManager manager, String registry, String tag, String scope) Initializes metrics specific to this producer

Methods inherited from class org.apache.http.protocol.HttpRequestExecutor

canResponseHaveBody, doReceiveResponse, doSendRequest, postProcess, preProcess

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.solr.metrics.SolrMetricProducer

close, getSolrMetricsContext, getUniqueMetricTag, initializeMetrics

Field Detail

QUERYLESS_URL_AND_METHOD

public static final HttpClientMetricNameStrategy QUERYLESS_URL_AND_METHOD

METHOD_ONLY

public static final HttpClientMetricNameStrategy METHOD_ONLY

HOST_AND_METHOD

public static final HttpClientMetricNameStrategy HOST_AND_METHOD

KNOWN_METRIC_NAME_STRATEGIES

public static final Map<String,HttpClientMetricNameStrategy> KNOWN_METRIC_NAME_STRATEGIES

metricsRegistry

protected com.codahale.metrics.MetricRegistry metricsRegistry

metricManager

protected SolrMetricManager metricManager

registryName

protected String registryName

scope

protected String scope

nameStrategy

protected HttpClientMetricNameStrategy nameStrategy

Constructor Detail

InstrumentedHttpRequestExecutor

public InstrumentedHttpRequestExecutor(int waitForContinue,
                                       HttpClientMetricNameStrategy nameStrategy)

InstrumentedHttpRequestExecutor

public InstrumentedHttpRequestExecutor(HttpClientMetricNameStrategy nameStrategy)

Method Detail

execute

public org.apache.http.HttpResponse execute(org.apache.http.HttpRequest request,
                                            org.apache.http.HttpClientConnection conn,
                                            org.apache.http.protocol.HttpContext context)
                                     throws IOException,
                                            org.apache.http.HttpException

Overrides:

execute in class org.apache.http.protocol.HttpRequestExecutor

Throws:

IOException

org.apache.http.HttpException

initializeMetrics

public void initializeMetrics(SolrMetricManager manager,
                              String registry,
                              String tag,
                              String scope)

Description copied from interface: SolrMetricProducer

Initializes metrics specific to this producer

Specified by:

initializeMetrics in interface SolrMetricProducer

Parameters:

manager - an instance of SolrMetricManager

registry - registry name where metrics are registered

tag - a symbolic tag that represents this instance of the producer, or a group of related instances that have the same life-cycle. This tag is used when managing life-cycle of some metrics.

scope - scope of the metrics (eg. handler name) to separate metrics of components with the same implementation but different scope.