io.opentracing.contrib.apache.http.client

Class TracingClientExec

java.lang.Object

io.opentracing.contrib.apache.http.client.TracingClientExec

All Implemented Interfaces:

org.apache.http.impl.execchain.ClientExecChain

public class TracingClientExec
extends Object
implements org.apache.http.impl.execchain.ClientExecChain

Tracing is added before ProtocolExec which is invoked as the next to last. Note that RedirectExec is invoked before so this exec has to deal with redirects.

Author:

Pavol Loffay

Field Summary

Fields

Modifier and Type	Field and Description
protected static String	REDIRECT_COUNT Tracing ClientExecChain is executed after redirect exec, so on redirects it is called multiple times.
protected static String	SPAN_PROP Id of HttpCoreContext.setAttribute(String, Object) representing span associated with the current client processing.

Constructor Summary

Constructors

Constructor and Description
TracingClientExec(org.apache.http.impl.execchain.ClientExecChain clientExecChain, org.apache.http.client.RedirectStrategy redirectStrategy, boolean redirectHandlingDisabled, boolean injectDisabled, io.opentracing.Tracer tracer, List<ApacheClientSpanDecorator> spanDecorators)

Method Summary

Modifier and Type	Method and Description
org.apache.http.client.methods.CloseableHttpResponse	execute(org.apache.http.conn.routing.HttpRoute route, org.apache.http.client.methods.HttpRequestWrapper request, org.apache.http.client.protocol.HttpClientContext clientContext, org.apache.http.client.methods.HttpExecutionAware execAware)
protected io.opentracing.Span	handleLocalSpan(org.apache.http.HttpRequest httpRequest, org.apache.http.client.protocol.HttpClientContext clientContext)
protected org.apache.http.client.methods.CloseableHttpResponse	handleNetworkProcessing(io.opentracing.Span parentSpan, org.apache.http.conn.routing.HttpRoute route, org.apache.http.client.methods.HttpRequestWrapper request, org.apache.http.client.protocol.HttpClientContext clientContext, org.apache.http.client.methods.HttpExecutionAware execAware)

Methods inherited from class java.lang.Object

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

Field Detail

SPAN_PROP

protected static final String SPAN_PROP

Id of HttpCoreContext.setAttribute(String, Object) representing span associated with the current client processing. Referenced span is local span not a span representing HTTP communication.

REDIRECT_COUNT

protected static final String REDIRECT_COUNT

Tracing ClientExecChain is executed after redirect exec, so on redirects it is called multiple times. This is used as an id for HttpCoreContext.setAttribute(String, Object) to store number of redirects.

Constructor Detail

TracingClientExec

public TracingClientExec(org.apache.http.impl.execchain.ClientExecChain clientExecChain,
                         org.apache.http.client.RedirectStrategy redirectStrategy,
                         boolean redirectHandlingDisabled,
                         boolean injectDisabled,
                         io.opentracing.Tracer tracer,
                         List<ApacheClientSpanDecorator> spanDecorators)

Method Detail

execute

public org.apache.http.client.methods.CloseableHttpResponse execute(org.apache.http.conn.routing.HttpRoute route,
                                                                    org.apache.http.client.methods.HttpRequestWrapper request,
                                                                    org.apache.http.client.protocol.HttpClientContext clientContext,
                                                                    org.apache.http.client.methods.HttpExecutionAware execAware)
                                                             throws IOException,
                                                                    org.apache.http.HttpException

Specified by:

execute in interface org.apache.http.impl.execchain.ClientExecChain

Throws:

IOException

org.apache.http.HttpException

handleLocalSpan

protected io.opentracing.Span handleLocalSpan(org.apache.http.HttpRequest httpRequest,
                                              org.apache.http.client.protocol.HttpClientContext clientContext)

handleNetworkProcessing

protected org.apache.http.client.methods.CloseableHttpResponse handleNetworkProcessing(io.opentracing.Span parentSpan,
                                                                                       org.apache.http.conn.routing.HttpRoute route,
                                                                                       org.apache.http.client.methods.HttpRequestWrapper request,
                                                                                       org.apache.http.client.protocol.HttpClientContext clientContext,
                                                                                       org.apache.http.client.methods.HttpExecutionAware execAware)
                                                                                throws IOException,
                                                                                       org.apache.http.HttpException

Throws:

IOException

org.apache.http.HttpException