jacoco tomcat configaration. report not getting generated

Question

I am new to jacoco and trying to add jacoco coverage for a web application. i saw some links and came to know that we have to add javaagent below are the things that i did.

build.xml

<?xml version="1.0" ?> 
<project xmlns:jacoco="antlib:org.jacoco.ant" name="Example Ant Build with JaCoCo" default="rebuild">
<description>
Example Ant build file that demonstrates how a JaCoCo coverage report can be itegrated into an existing build in three simple steps.
</description>
<property name="src.dir" location="./src"/>
<property name="result.dir" location="./target"/>
<property name="result.classes.dir" location="${result.dir}/classes"/>
<property name="result.report.dir" location="${result.dir}/site/jacoco"/>
<property name="result.exec.file" location="${result.dir}/jacoco.exec"/>
<!--  Step 1: Import JaCoCo Ant tasks  -->
<taskdef uri="antlib:org.jacoco.ant" resource="org/jacoco/ant/antlib.xml">
<classpath path="../../../lib/jacocoant.jar"/>
</taskdef>
<target name="clean">
<delete dir="${result.dir}"/>
</target>
<target name="compile">
<mkdir dir="${result.classes.dir}"/>
<javac srcdir="${src.dir}" destdir="${result.classes.dir}" debug="true" includeantruntime="false"/>
</target>
<target name="test" depends="compile">
<!--
 Step 2: Wrap test execution with the JaCoCo coverage task 
-->
<jacoco:coverage destfile="${result.exec.file}" includes="*">
<java  classname="com.antspringmvc.exp.Math" fork="true" >


<classpath path="${result.classes.dir}"/>

</java>


</jacoco:coverage>
</target>
<target name="report" depends="test">
<!--  Step 3: Create coverage report  -->
<jacoco:report>
<!--
 This task needs the collected execution data and ... 
-->
<executiondata>
<file file="${result.exec.file}"/>
</executiondata>
<!--  the class files and optional source files ...  -->
<structure name="JaCoCo Ant Example">
<classfiles>
<fileset dir="${result.classes.dir}"/>
</classfiles>
<sourcefiles encoding="UTF-8">
<fileset dir="${src.dir}"/>
</sourcefiles>
</structure>
<!--  to produce reports in different formats.  -->
<html destdir="${result.report.dir}"/>
<csv destfile="${result.report.dir}/report.csv"/>
<xml destfile="${result.report.dir}/report.xml"/>
</jacoco:report>
</target>
<target name="rebuild" depends="clean,compile,test,report"/>
</project>

I have added the below code to my tomcat:

if ""%1"" == ""stop"" goto skip_agent
set "JAVA_OPTS=%JAVA_OPTS% -javaagent: C:\Users\kk\Desktop\Personal\jars\jacocoagent.jar=destfile=C:\Users\kk\Desktop\Personal\WorkSpace\JacocoExample\target\jacoco.exec,append=true,output=tcpserver,address=localhost,port=8080,includes=*"

i thought after stopping the server the report will be generated but that has not happened.

am i missing something in the configuration

Advice: instead of trying random things and asking tons of slightly different questions here under different usernames (I refer to https://stackoverflow.com/questions/46276784/how-does-jacoco-work-with-ant that contains pretty similar `build.xml`), please take time to carefully study documentation and principles of work of a tools that you're trying to use. — Godin, Sep 18 '17 at 20:42
If the problem continues despite of applying the workarounds, you may have a look at my answer on [maven jacoco: not generating code coverage report](https://stackoverflow.com/questions/25395255/maven-jacoco-not-generating-code-coverage-report/71661614#71661614). — Murat Yıldız, Mar 29 '22 at 12:04

Godin · Answer 1 · 2017-09-18T20:42:58.530

From your build.xml seems that you expect JaCoCo agent to generate jacoco.exec file, however according to

if ""%1"" == ""stop"" goto skip_agent
  set "JAVA_OPTS=%JAVA_OPTS% -javaagent: C:\Users\kk\Desktop\Personal\jars\jacocoagent.jar=destfile=C:\Users\kk\Desktop\Personal\WorkSpace\JacocoExample\target\jacoco.exec,append=true,output=tcpserver,address=localhost,port=8080,includes=*"

you configure agent with output=tcpserver, which means quoting documentation at http://www.jacoco.org/jacoco/trunk/doc/agent.html :

The agent listens for incoming connections on the TCP port specified by the address and port attribute. Execution data is written to this TCP connection.

jacoco tomcat configaration. report not getting generated

1 Answers1