Make Integraton Test cover all submodules - maven

Question

I do searched for similar topics. But mine issue is different.
The background is that I've got an single spring boot project, and it became bigger and bigger. Then I split it into serveral modules following the guide from spring Spring boot - Creating a Multi Module Project.
Let's say, now I've got 2 projects: Web and ServiceLayer. All my previous integration test are in Web now, and it looks like that from sonar I can only see the coverage of proejct-web.
I am using jacoco maven plugin and here is the maven pom:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-report-plugin</artifactId>
<version>2.19.1</version>
<configuration>
<showSuccess>false</showSuccess>
</configuration>
</plugin>
<!-- JaCoCo configuration -->
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.7.5.201505241946</version>
<executions>
<execution>
<id>default-prepare-agent</id>
<goals>
<goal>prepare-agent</goal>
</goals>
</execution>
<execution>
<id>default-report</id>
<phase>prepare-package</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
</executions>
</plugin>
How to configure and make the coverage of submodules available on sonar?
Thanks!

Answer 1

You can add the destFile tag after your goals tag
Something like this
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.7.8</version>
<configuration>
<append>true</append>
</configuration>
<executions>
<execution>
<id>default-prepare-agent</id>
<goals>
<goal>prepare-agent</goal>
</goals>
<configuration>
<destFile>${project.basedir}/../target/jacoco.exec</destFile>
</configuration>
</execution>
<execution>
<id>default-report</id>
<phase>prepare-package</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
</executions>
</plugin>
This will aggregrate all the results in each of the modules into a file.