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I have this architecture

 mmsb |----pom.xml (packaging : pom) -> declare modules API and Utils |----api | |----pom.xml (packaging : pom) -> declare module api-slack / parent project | |----api-slack | |----pom.xml (packaging : pom) -> declare module api-slack-core / parent api | |----api-slack-core | |----pom.xml (packaging : jar) -> java code / parent api-slack |----utils | |----pom.xml (packaging : jar) -> java code / parent project / has dependency from api-slack-core |

And it not works

With clean install from root Maven say : 

 ~/dev/maven-multi-sub-projets ⌚ 11:03:48 $ mvn clean install -DskipTests Picked up JAVA_TOOL_OPTIONS: -javaagent:/usr/share/java/jayatanaag.jar [INFO] Scanning for projects... [INFO] ------------------------------------------------------------------------ [INFO] Reactor Build Order: [INFO] [INFO] mmsb [INFO] api [INFO] api-slack [INFO] api-slack-core [INFO] utils [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building mmsb 1.0-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] [INFO] --- maven-clean-plugin:2.6.1:clean (default-clean) @ mmsb --- [INFO] [INFO] --- maven-install-plugin:2.5.2:install (default-install) @ mmsb --- [INFO] Installing /home/mario/dev/maven-multi-sub-projets/pom.xml to /opt/maven/m2repo/fr/app/mmsb/1.0-SNAPSHOT/mmsb-1.0-SNAPSHOT.pom [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building api 1.0-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] [INFO] --- maven-clean-plugin:2.6.1:clean (default-clean) @ api --- [INFO] [INFO] --- maven-install-plugin:2.5.2:install (default-install) @ api --- [INFO] Installing /home/mario/dev/maven-multi-sub-projets/api/pom.xml to /opt/maven/m2repo/fr/app/api/1.0-SNAPSHOT/api-1.0-SNAPSHOT.pom [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building api-slack 1.0-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] [INFO] --- maven-clean-plugin:2.6.1:clean (default-clean) @ api-slack --- [INFO] [INFO] --- maven-install-plugin:2.5.2:install (default-install) @ api-slack --- [INFO] Installing /home/mario/dev/maven-multi-sub-projets/api/api-slack/pom.xml to /opt/maven/m2repo/fr/app/api-slack/1.0-SNAPSHOT/api-slack-1.0-SNAPSHOT.pom [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building api-slack-core 1.0-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] [INFO] --- maven-clean-plugin:2.6.1:clean (default-clean) @ api-slack-core --- [INFO] Deleting /home/mario/dev/maven-multi-sub-projets/api/api-slack/api-slack-core/target [INFO] [INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ api-slack-core --- [INFO] Using 'UTF-8' encoding to copy filtered resources. [INFO] Copying 0 resource [INFO] Copying 0 resource [INFO] [INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ api-slack-core --- [INFO] Changes detected - recompiling the module! [INFO] Compiling 2 source files to /home/mario/dev/maven-multi-sub-projets/api/api-slack/api-slack-core/target/classes [INFO] [INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ api-slack-core --- [INFO] Using 'UTF-8' encoding to copy filtered resources. [INFO] Copying 0 resource [INFO] [INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ api-slack-core --- [INFO] Nothing to compile - all classes are up to date [INFO] [INFO] --- maven-surefire-plugin:2.18.1:test (default-test) @ api-slack-core --- [INFO] Tests are skipped. [INFO] [INFO] --- maven-jar-plugin:2.6:jar (default-jar) @ api-slack-core --- [INFO] Building jar: /home/mario/dev/maven-multi-sub-projets/api/api-slack/api-slack-core/target/api-slack-core-1.0-SNAPSHOT.jar [INFO] [INFO] --- spring-boot-maven-plugin:1.4.2.RELEASE:repackage (default) @ api-slack-core --- [INFO] [INFO] --- maven-install-plugin:2.5.2:install (default-install) @ api-slack-core --- [INFO] Installing /home/mario/dev/maven-multi-sub-projets/api/api-slack/api-slack-core/target/api-slack-core-1.0-SNAPSHOT.jar to /opt/maven/m2repo/fr/app/api-slack-core/1.0-SNAPSHOT/api-slack-core-1.0-SNAPSHOT.jar [INFO] Installing /home/mario/dev/maven-multi-sub-projets/api/api-slack/api-slack-core/pom.xml to /opt/maven/m2repo/fr/app/api-slack-core/1.0-SNAPSHOT/api-slack-core-1.0-SNAPSHOT.pom [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building utils 1.0-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] [INFO] --- maven-clean-plugin:2.6.1:clean (default-clean) @ utils --- [INFO] Deleting /home/mario/dev/maven-multi-sub-projets/utils/target [INFO] [INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ utils --- [INFO] Using 'UTF-8' encoding to copy filtered resources. [INFO] Copying 0 resource [INFO] Copying 0 resource [INFO] [INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ utils --- [INFO] Changes detected - recompiling the module! [INFO] Compiling 1 source file to /home/mario/dev/maven-multi-sub-projets/utils/target/classes [INFO] ------------------------------------------------------------- [ERROR] COMPILATION ERROR : [INFO] ------------------------------------------------------------- [ERROR] /home/mario/dev/maven-multi-sub-projets/utils/src/main/java/fr/app/utils/Application.java:[3,29] package fr.app.api.slack.core does not exist [ERROR] /home/mario/dev/maven-multi-sub-projets/utils/src/main/java/fr/app/utils/Application.java:[11,13] cannot find symbol symbol: class SlackService location: class fr.app.utils.Application [INFO] 2 errors [INFO] ------------------------------------------------------------- [INFO] ------------------------------------------------------------------------ [INFO] Reactor Summary: [INFO] [INFO] mmsb ............................................... SUCCESS [ 0.213 s] [INFO] api ................................................ SUCCESS [ 0.005 s] [INFO] api-slack .......................................... SUCCESS [ 0.004 s] [INFO] api-slack-core ..................................... SUCCESS [ 1.558 s] [INFO] utils .............................................. FAILURE [ 0.113 s] [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 2.197 s [INFO] Finished at: 2016-12-15T11:03:52+01:00 [INFO] Final Memory: 32M/317M [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project utils: Compilation failure: Compilation failure: [ERROR] /home/mario/dev/maven-multi-sub-projets/utils/src/main/java/fr/app/utils/Application.java:[3,29] package fr.app.api.slack.core does not exist [ERROR] /home/mario/dev/maven-multi-sub-projets/utils/src/main/java/fr/app/utils/Application.java:[11,13] cannot find symbol [ERROR] symbol: class SlackService [ERROR] location: class fr.app.utils.Application [ERROR] -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException [ERROR] [ERROR] After correcting the problems, you can resume the build with the command [ERROR] mvn <goals> -rf :utils

How to declare dependency of api-slack-core in utils ?

UPDATE

I upload code in this repository : https://github.com/mmaryo/mmsb

The problem is when I import fr.app.api.slack.core.SlackService inside fr.app.utils.Application

UPDATE 2

I found the problem, I removed : 

 <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin>
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  • Have you performed mvn clean install from the root module ? Commented Dec 14, 2016 at 14:39
  • Yes it's clean install from root Commented Dec 14, 2016 at 14:59
  • OK. Can you show the pom of Utils and Api-slack-core modules ? Commented Dec 14, 2016 at 15:02

2 Answers 2

Reset to default
1

Few things here -

At your parent pom level (project), why do you still have parent declared? 

<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.4.2.RELEASE</version> </parent>

that too with 

<packaging>pom</packaging>

and along with that why do you have 

<module>api-slack</module> <module>api-slack-core</module>

if they are supposed to be hierarchically within api -> api-slack -> api-slack-core. As an improvement please move module out within the project level as well.

Then at Api level, I doubt how even Api is building currently with incorrect parent name - 

<parent> <groupId>fr.app</groupId> <artifactId>vishnou</artifactId> <!-- modified --> <version>1.0-SNAPSHOT</version> </parent>

Api-slack seems fine.

Api-slack-core can get rid of redundant empty 

<dependencies></dependencies>

and specify a version for plugin(unless already defined in any of the parent poms) as - 

<plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <version>x.y.z</version> </plugin>

Further Utils can use Api-slack-core as a dependency and also please change 

<groupId>fr.app</groupId> <artifactId>utils</artifactId> <!--changed-->

Overall, I would suggest you to please go through a multi module example as suggested by the guide as well.

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3 Comments

vishnou is the name of the project, I correct it because I change the name for stackoverflow
spring-boot-starter-parent is the parent of my parent (vishnou) because I use spring boot projects.spring.io/spring-boot
hi nullpointer, I upload code on github. Hope you can help me
0

Try running mvn clean install -pl Utils -am ? where Utils is the name of the module in the parent-pom.

Maven Reactor should figure out the dependencies by itself - you just need to put the GAV (groupid, artifactid, version) of your dependencies.

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