linking my own application jar file to my maven build.

[sam White]

Hello.

I have created 2 applications:
1. hello-world-service
2. hello-world-service-impl

And then I have created a hello-world-service.jar file for the hello-world-service package in my hello-world application.
I cd into hello-world-service-impl directory and execute the maven command "mvn clean package", it thrown the following exception:

$ mvn clean package
[INFO] Scanning for projects…
[WARNING]
[WARNING] Some problems were encountered while building the effective model for nl.devatwork.hello.world:hello-world-service-impl:war:1.0.0-SNAPSHOT
[WARNING] ‘build.plugins.plugin.version’ for org.apache.maven.plugins:maven-compiler-plugin is missing. @ nl.devatwork.hello.world:hello-world-application:1.0.0-SNAPSHOT, C:\work\hello-world-start\pom.xml, line 24, column 21
[WARNING]
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING]
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING]
[INFO]
[INFO] ————————————————————————
[INFO] Building Dev@Work Hello World Service Implementation 1.0.0-SNAPSHOT
[INFO] ————————————————————————
Downloading: http://localhost:8081/nexus/content/repositories/thirdparty/nl/devatwork/hello/world/hello-world-service/1.0.0-SNAPSHOT/maven-metadata.xml
[WARNING] Could not transfer metadata nl.devatwork.hello.world:hello-world-service:1.0.0-SNAPSHOT/maven-metadata.xml from/to thirdparty (http://localhost:8081/nexus/content/repositories/thirdparty): Error transferring file: Connection refused: connect
Downloading: http://localhost:8081/nexus/content/repositories/thirdparty/nl/devatwork/hello/world/hello-world-service/1.0.0-SNAPSHOT/maven-metadata.xml
[WARNING] Could not transfer metadata nl.devatwork.hello.world:hello-world-service:1.0.0-SNAPSHOT/maven-metadata.xml from/to thirdparty (http://localhost:8081/nexus/content/repositories/thirdparty): Error transferring file: Connection refused: connect
Downloading: http://localhost:8081/nexus/content/repositories/thirdparty/nl/devatwork/hello/world/hello-world-service/1.0.0-SNAPSHOT/hello-world-service-1.0.0-SNAPSHOT.pom
[INFO] ————————————————————————
[INFO] BUILD FAILURE
[INFO] ————————————————————————
[INFO] Total time: 3.684s
[INFO] Finished at: Mon Jul 04 11:15:50 EST 2011
[INFO] Final Memory: 3M/55M
[INFO] ————————————————————————
[ERROR] Failed to execute goal on project hello-world-service-impl: Could not resolve dependencies for project nl.devatwork.hello.world:hello-world-service-impl:war:1.0.0-SNAPSHOT: Failed to collect dependencies for [com.liferay.portal:portal-kernel:jar:5.2.8 (provided), com.liferay.portal:portal-service:jar:5.2.8 (provided), nl.devatwork.hello.world:hello-world-service:jar:1.0.0-SNAPSHOT (provided)]: Failed to read artifact descriptor for nl.devatwork.hello.world:hello-world-service:jar:1.0.0-SNAPSHOT: Could not transfer artifact nl.devatwork.hello.world:hello-world-service:pom:1.0.0-SNAPSHOT from/to thirdparty (http://localhost:8081/nexus/content/repositories/thirdparty): Error transferring file: Connection refused: connect -> [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/DependencyResolutionException

I am wondering how to configure maven to get a local copy of my hello-world-service-SNAPSHOT.jar file, rather than going to grab it from my local repository ?

Thanks
Sam,

[Peter Johnson]

When you created hello-world-service, did you run "mvn install"? That will place the JAR into your local repository. And the local repository is the proper place for the JAR; that is the only place where Maven will look for it.

How is the hello-world-service declared in its POM? And how is it referenced in the hello-world-service-impl POM? If they are short, please post them. If they are long, please attach them.

Also, it appears that Maven can't find two of the Liferay JARs. Have you configured the build to look in the correct repository for those JARs? (I don't know which repository would have those JARs, you might have to look on the Liferay website. If nothing else you can install the JARs in your local repository.

By the way, have you read this: http://www.sonatype.com/index.php/Support/Books/Maven-The-Complete-Reference

[sam White]

Thank you very much for the quick response and suggestion again.

I have executed mvn install commandline,

sam@sam-PC /cygdrive/c/work/hello-world-start/hello-world-service
$ mvn install
[INFO] Scanning for projects...
[WARNING] 
[WARNING] Some problems were encountered while building the effective model for nl.devatwork.hello.world:hello-world-service:jar:1.0.0-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ nl.devatwork.hello.world:hello-world-application:1.0.0-SNAPSHOT, C:\work\hello-world-start\pom.xml, line 24, column 21
[WARNING] 
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING] 
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING] 
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building Dev@Work Hello World Service Contract 1.0.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-resources-plugin:2.4.3:resources (default-resources) @ hello-world-service ---
[WARNING] Using platform encoding (GBK actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 0 resource
[INFO] 
[INFO] --- maven-compiler-plugin:2.3.2:compile (default-compile) @ hello-world-service ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- maven-resources-plugin:2.4.3:testResources (default-testResources) @ hello-world-service ---
[WARNING] Using platform encoding (GBK actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory C:\work\hello-world-start\hello-world-service\src\test\resources
[INFO] 
[INFO] --- maven-compiler-plugin:2.3.2:testCompile (default-testCompile) @ hello-world-service ---
[INFO] No sources to compile
[INFO] 
[INFO] --- maven-surefire-plugin:2.7.2:test (default-test) @ hello-world-service ---
[INFO] No tests to run.
[INFO] Surefire report directory: C:\work\hello-world-start\hello-world-service\target\surefire-reports
-------------------------------------------------------
 T E S T S
-------------------------------------------------------
There are no tests to run.

Results :

Tests run: 0, Failures: 0, Errors: 0, Skipped: 0

[INFO] 
[INFO] --- maven-jar-plugin:2.3.1:jar (default-jar) @ hello-world-service ---
[INFO] 
[INFO] --- maven-install-plugin:2.3.1:install (default-install) @ hello-world-service ---
[INFO] Installing C:\work\hello-world-start\hello-world-service\target\hello-world-service-1.0.0-SNAPSHOT.jar to C:\maven\repository\nl\devatwork\hello\world\hello-world-service\1.0.0-SNAPSHOT\hello-world-service-1.0.0-SNAPSHOT.jar
[INFO] Installing C:\work\hello-world-start\hello-world-service\pom.xml to C:\maven\repository\nl\devatwork\hello\world\hello-world-service\1.0.0-SNAPSHOT\hello-world-service-1.0.0-SNAPSHOT.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 9.008s
[INFO] Finished at: Mon Jul 04 14:34:05 EST 2011
[INFO] Final Memory: 4M/29M
[INFO] ------------------------------------------------------------------------

It seems ok for building and installing the hello-world-service module.

then having error when I tried to build hello-world-service-impl:

sam@sam-PC /cygdrive/c/work/hello-world-start/hello-world-service
$ cd ../hello-world-service-impl/

sam@sam-PC /cygdrive/c/work/hello-world-start/hello-world-service-impl
$ mvn clean package
[INFO] Scanning for projects...
[WARNING] 
[WARNING] Some problems were encountered while building the effective model for nl.devatwork.hello.world:hello-world-service-impl:war:1.0.0-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ nl.devatwork.hello.world:hello-world-application:1.0.0-SNAPSHOT, C:\work\hello-world-start\pom.xml, line 24, column 21
[WARNING] 
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING] 
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING] 
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building Dev@Work Hello World Service Implementation 1.0.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
Downloading: http://localhost:8081/nexus/content/repositories/thirdparty/nl/devatwork/hello/world/hello-world-application/1.0.0-SNAPSHOT/maven-metadata.xml
Downloading: http://localhost:8081/nexus/content/repositories/thirdparty/nl/devatwork/hello/world/hello-world-application/1.0.0-SNAPSHOT/hello-world-application-1.0.0-SNAPSHOT.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.047s
[INFO] Finished at: Mon Jul 04 14:34:32 EST 2011
[INFO] Final Memory: 3M/54M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project hello-world-service-impl: Could not resolve dependencies for project nl.devatwork.hello.world:hello-world-service-impl:war:1.0.0-SNAPSHOT: Failed to collect dependencies for [com.liferay.portal:portal-kernel:jar:5.2.8 (provided), com.liferay.portal:portal-service:jar:5.2.8 (provided), nl.devatwork.hello.world:hello-world-service:jar:1.0.0-SNAPSHOT (provided)]: Failed to read artifact descriptor for nl.devatwork.hello.world:hello-world-service:jar:1.0.0-SNAPSHOT: Could not find artifact nl.devatwork.hello.world:hello-world-application:pom:1.0.0-SNAPSHOT in thirdparty (http://localhost:8081/nexus/content/repositories/thirdparty) -> [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/DependencyResolutionException

Here is the parent pom.xml file:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>nl.devatwork.hello.world</groupId>
    <version>1.0.0-SNAPSHOT</version>
    <artifactId>hello-world-application</artifactId>
    <packaging>pom</packaging>
    <name>Dev@Work Hello World Application</name>

    <properties>
        <servlet-api.version>2.4</servlet-api.version>
        <portlet-api.version>2.0</portlet-api.version>
        <liferay.version>5.2.8</liferay.version>
    </properties>

    <modules>
        <module>hello-world-service</module>
        <module>hello-world-service-impl</module>
        <module>hello-world-portlets</module>
    </modules>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

pom.xml file for hello-world-service module:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>nl.devatwork.hello.world</groupId>
    <version>1.0.0-SNAPSHOT</version>
    <artifactId>hello-world-service</artifactId>
    <packaging>jar</packaging>
    <name>Dev@Work Hello World Service Contract</name>
	
	<parent>
        <groupId>nl.devatwork.hello.world</groupId>
        <artifactId>hello-world-application</artifactId>
        <version>1.0.0-SNAPSHOT</version>
    </parent>
	
	<dependencies>
	</dependencies>
	
</project>

pom.xml file for hello-world-service-impl:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>nl.devatwork.hello.world</groupId>
    <version>1.0.0-SNAPSHOT</version>
    <artifactId>hello-world-service-impl</artifactId>
    <packaging>war</packaging>
    <name>Dev@Work Hello World Service Implementation</name>
	
	<parent>
        <groupId>nl.devatwork.hello.world</groupId>
        <artifactId>hello-world-application</artifactId>
        <version>1.0.0-SNAPSHOT</version>
    </parent>
	
	<dependencies>
        <dependency>
            <groupId>com.liferay.portal</groupId>
            <artifactId>portal-kernel</artifactId>
            <version>${liferay.version}</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>com.liferay.portal</groupId>
            <artifactId>portal-service</artifactId>
            <version>${liferay.version}</version>
            <scope>provided</scope>
        </dependency>
		<dependency>
			<groupId>nl.devatwork.hello.world</groupId>
			<artifactId>hello-world-service</artifactId>
			<version>1.0.0-SNAPSHOT</version>
			<scope>provided</scope>
		</dependency>
	</dependencies>
	
</project>

Thanks again
Sam

[Peter Johnson]

The problem with building hello-world-service-impl is that Maven cannot find the parent POM. Did you build the parent POM using "mvn install"? Doing so will place the parent POM into the local repository so that all the builds can see it.

By the way, where is the parent pom.xml file located? Is it in the same directory as the hello-world-service POM?

[sam White]

Hi Peter,

Your solution works.
Thank you very much indeed for the precise suggestion.

A great help as always.

Thanks
Sam