My project is a fairly large project consisting of many maven modules (but not microservices). I was trying to do Moving from spring to spring-bom on WAS but seems lot of clashes in versions. So for example one of my modules is using commons-collectionsversion 2.6.0 and my current project is using 3.2.2. I want the same jar to be used across. Since its more of a migration project I cannot do changes in container or repository changes at this time. I should only make sure that all the version are compatible with each other. My plan :
I want to include a dependency which is with in some other dependency
into the current pom as a dependency.
Also I want other jars in this pom (which exists as a dependency) to included the dependency
Is there anyway to do it?
I didn't completely understand your question, but the can help you to define a cross-module dependency version, as long as you place it in the parent-pom file.
<dependencyManagement>
<dependency>
<groupId>com.group</groupId>
<artifactId>project-1</artifactId>
<version>1.0.0</version>
</dependency>
</dependencyManagement>
and then define the dependency in the relevant module without providing it a version (it will be inherited from the parent-pom's <dependencyManagment> tag:
<dependencies>
<dependency>
<groupId>com.group</groupId>
<artifactId>project-1</artifactId>
</dependency>
</dependencies>
I get vaadin-client-compiler artifact (which brings Jetty with it) included with my production project. Am I supposed to ?
To reproduce I'm starting from scratch and letting Maven generate a Vaadin multimodule project for me:
mvn
-DarchetypeGroupId=com.vaadin
-DarchetypeArtifactId=vaadin-archetype-application-multimodule
-DarchetypeVersion=7.6.2
-DarchetypeRepository=http://repo.maven.apache.org/maven2/
-DgroupId=com.acme
-DartifactId=VaadinTest1
-Dversion=1.0.0-SNAPSHOT
-Dpackage=com.acme.vaadintest1
-Dbasedir=D:\\dev\\java
-DthemeName=mytheme
-DwidgetsetName=MyAppWidgetset
-DuiName=MyUI
-Darchetype.interactive=false
--batch-mode archetype:generate
Then in the parent project I execute:
mvn -Pproduction clean install
After this is done I look into the WAR file generated in the "xxx-production" project and notice it contains vaadin-client-compiler, Jetty, and what not.
I've found this ticket and by looking at the last comment it seems I shouldn't have anything like that in my production WAR. I hesitate to change my POMs as they are generated by the archetype and I guess at some level supposed to represent kind of a Vaadin best-practice approach. I wouldn't want to second guess that. Or ?
The problem with these artifacts being part of the classpath is that
it balloons the size of the WAR
it creates some problems wrt Atmosphere which supposedly gets confused because it finds Jetty on the classpath. (Atmosphere is used under the hood by Vaadin)
The result is that you'll get SEVERE error like this in the log when deploying on Tomcat 8:
14-Feb-2016 16:42:30.368 SEVERE [localhost-startStop-1] org.atmosphere.cpr.DefaultAsyncSupportResolver.newCometSupport Failed to create comet support class: class org.
atmosphere.container.JettyServlet30AsyncSupportWithWebSocket, error: null
To sum up:
Is it correct that I'm not supposed to have these artifacts in a
Vaadin 7.6.2 production project ?
How to solve ?
I believe I've found the answer. It seems Vaadin team was/is fully aware of this but it is kind of a left-over from the old days when there was some kind of annoying bug.
In your xxx-widgetset project you'll see something like this in the POM for that project:
<dependencies>
<!-- Versions for these are configured in the parent POM -->
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-client</artifactId>
<!-- TODO this should have scope provided once http://dev.vaadin.com/ticket/14788 is resolved -->
<!-- <scope>provided</scope> -->
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-client-compiler</artifactId>
<!-- TODO this should have scope provided once http://dev.vaadin.com/ticket/14788 is resolved -->
<!-- <scope>provided</scope> -->
</dependency>
... you'll see more deps here if you've added
... Vaadin add-ons to your project.
</dependencies>
See the TODO comments ??
Well, it just so happens that the bug mentioned in ticket 14788 doesn't happen anymore, at least not on 7.6.2. So you can now safely do what the TODO comment says.
This has reduced my WAR size by 50-70 pct.
It seems to me there's no longer any good reason why this archetype generation doesn't actually do what TODO comment says. Currently you'll have to manually correct it every time you generate a new project skeleton.
If you work with a different webserver (in your case Tomcat 8) you don't need the provided jetty-plugin.
As the archetype has some jetty-dependencies you can exclude them with the
exclusions tag in the Maven POM file.
Example
<groupId>com.vaadin</groupId>
<artifactId>vaadin-client-compiler</artifactId>
<version>${vaadin.version}</version>
<exclusions>
<exclusion>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-servlets</artifactId>
</exclusion>
<exclusion>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-annotations</artifactId>
</exclusion>
<exclusion>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-util</artifactId>
</exclusion>
</exclusions>
Moreover delete/comment out all unnecessary "jetty" dependencies found in the module POM files.
I'm declaring a test dependency on powermock with easymock bundled in.
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-easymock-release-full</artifactId>
<version>1.4.12</version>
<type>pom</type>
<scope>test</scope>
</dependency>
When I run mvn test, the test src claims to be able to find org.powermock but not org.easymock, despite it being included in the above dependency.
I wondered whether it was a problem due to transitivity of the test scope, so i tried compile scope also (as the documentation http://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html mentions that the compile dependencies are available at test time) without any luck.
I've also tried using a bundled jar instead of pom, to no avail. I realise i could declare the dependencies separately (ie separate dependencies for powermock and easymock) but for my purposes i'm restricted to having just the one dependency including all necessary test libs.
Tracing this back to the powermock parent pom I see that the easymock dependency is marked "provided."
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.easymock</groupId>
<artifactId>easymock</artifactId>
<version>3.1</version>
<scope>provided</scope>
</dependency>
Looks like powermock is expecting its clients (you in this case) to supply the easymock jars.
According to the powermock-easymock-release-full POM, it does not depend on easymock (ie easymock does not appear in the powermock-easymock-release-full dependencies). So you'll have to add another dependency to easymock, dependending on the test engine you're using (JUnit or TestNG): http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22org.powermock%22%20AND%20%22easymock%22
I have a maven plugin which is using hsqldb 1.8.0.10. In my pom.xml from the plugin, it is declared like this:
<dependency>
<groupId>hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<version>1.8.0.10</version>
</dependency>
But if I run that plugin from another maven project, and that project has a newer version of hsqldb (for instance 1.9.0), how can I configure my plugin that he will use the newest version of hsqldb, without changing it's pom.xml?
And is it possible to do this the other way around as well? If my other maven project uses hsqldb 1.7.0 (for instance), that he will use the 1.8.0.10 version which is specified in the maven plugin itself?
I hope someone can answer my question.
Kind regards,
Walle
Your main question is possible, but it might not work properly if the plugin doesn't work with the newer code for any reason.
A plugin can have it's own personal dependencies section, and will use standard Maven dependency resolution, choosing the highest version requested. So, you can do
<plugin>
<groupId>some.group.id</groupId>
<artifactId>some.artifact.id</artifactId>
<version>someversion</version>
<dependencies>
<dependency>
<groupId>hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<version>1.9.0</version>
</dependency>
</dependencies>
</plugin>
I don't think going the other way around is possible, though.
use properties place holder for the version, say ${hsqldb.version} then declare in different project pom the version you want to put in it
I am trying to build a simple Java project with Maven. In my pom-file I declare JUnit 4.8.2 as the only dependency. Still Maven insists on using JUnit version 3.8.1. How do I fix it?
The problem manifests itself in a compilation failure: "package org.junit does not exist". This is because of the import statement in my source code. The correct package name in JUnit 4.* is org.junit.* while in version 3.* it is junit.framework.*
I think I have found documentation on the root of the problem on http://maven.apache.org/plugins/maven-surefire-plugin/examples/junit.html but the advice there seems to be meant for Maven experts. I did not understand what to do.
Just to have an answer with the complete solution to help the visitors:
All you need to do is add the junit dependency to pom.xml. Don't forget the <scope>test</scope>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
#Dennis Roberts: You were absolutely right: My test class was located in src/main/java. Also the value of the "scope" element in the POM for JUnit was "test", although that is how it is supposed to be. The problem was that I had been sloppy when creating the test class in Eclipse, resulting in it being created in src/main/java insted of src/test/java. This became easier to see in Eclipse's Project Explorer view after running "mvn eclipse:eclipse", but your comment was what made me see it first. Thanks.
my problem was a line inside my pom.xml i had the line <sourceDirectory>${basedir}/src</sourceDirectory> removing this line made maven use regular structure folders which solves my issue
removing the scope tag in pom.xml for junit worked..
I had the same problem. All i did was - From the pom.xml file i deleted the dependency for junit 3.8 and added a new dependency for junit 4.8. Then i did maven clean and maven install. It did the trick. To verify , after maven install i went project->properties-build path->maven dependencies and saw that now the junit 3.8 jar is gone !, instead junit 4.8 jar is listed. cool!!. Now my test runs like a charm.. Hope this helps somehow..
Add this dependency to your pom.xml file:
http://mvnrepository.com/artifact/junit/junit-dep/4.8.2
<!-- https://mvnrepository.com/artifact/junit/junit-dep -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit-dep</artifactId>
<version>4.8.2</version>
</dependency>
I had my files at the correct places, and just removing <scope>test</scope> from the JUnit dependency entry solved the problem (I am using JUnit 4.12). I believe that with the test scope the dependency was just being ignored during the compilation phase. Now everything is working even when I call mvn test.
My case was a simple oversight.
I put the JUnit dependency declaration inside <dependencies> under the <dependencyManagement/> node instead of <project/> in the POM file. Correct way is:
<project>
<!-- Other elements -->
<dependencies>
<!-- Other dependencies-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
</dependency>
</dependencies>
<project>
I had a quite similar problem in a "test-utils" project (adding features, rules and assertions to JUnit) child of a parent project injecting dependencies.
The class depending on the org.junit.rules package was in src/main/java.
So I added a dependency on junit without test scope and it solved the problem :
pom.xml of the test-util project :
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
</dependency>
pom.xml of the parent project :
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
How did you declare the version?
<version>4.8.2</version>
Be aware of the meaning from this declaration explained here (see NOTES):
When declaring a "normal" version such as 3.8.2 for Junit, internally this is represented as "allow anything, but prefer 3.8.2." This means that when a conflict is detected, Maven is allowed to use the conflict algorithms to choose the best version. If you specify [3.8.2], it means that only 3.8.2 will be used and nothing else.
To force using the version 4.8.2 try
<version>[4.8.2]</version>
As you do not have any other dependencies in your project there shouldn't be any conflicts that cause your problem. The first declaration should work for you if you are able to get this version from a repository. Do you inherit dependencies from a parent pom?
Me too had the same problem as shown below.
To resolve the issue, below lines are added to dependencies section in the app level build.gradle.
compile 'junit:junit:4.12'
androidTestCompile 'com.android.support.test:runner:0.5'
Gradle build then reported following warning.
Warning:Conflict with dependency 'com.android.support:support-annotations'.
Resolved versions for app (25.1.0) and test app (23.1.1) differ.
See http://g.co/androidstudio/app-test-app-conflict for details.
To solve this warning, following section is added to the app level build.gradle.
configurations.all {
resolutionStrategy {
force 'com.android.support:support-annotations:23.1.1'
}
}
I had a similar problem of Eclipse compiling my code just fine but Maven failed when compiling the tests every time despite the fact JUnit was in my list of dependencies and the tests were in /src/test/java/.
In my case, I had the wrong version of JUnit in my list of dependencies. I wrote JUnit4 tests (with annotations) but had JUnit 3.8.x as my dependency. Between version 3.8.x and 4 of JUnit they changed the package name from junit.framework to org.junit which is why Maven still breaks compiling using a JUnit jar.
I'm still not entirely sure why Eclipse successfully compiled. It must have its own copy of JUnit4 somewhere in the classpath. Hope this alternative solution is useful to people. I reached this solution after following Arthur's link above.
I also ran into this issue - I was trying to pull in an object from a source and it was working in the test code but not the src code. To further test, I copied a block of code from the test and dropped it into the src code, then immediately removed the JUnit lines so I just had how the test was pulling in the object. Then suddenly my code wouldn't compile.
The issue was that when I dropped the code in, Eclipse helpfully resolved all the classes so I had JUnit calls coming from my src code, which was not proper. I should have noticed the warnings at the top about unused imports, but I neglected to see them.
Once I removed the unused JUnit imports in my src file, it all worked beautifully.
Find the one solution for this error if you have code in src/main/java Utils
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>3.9.1</version>
</dependency>
Changing the junit version fixed this for me. Seems like version 3.8.1 didn't work in my case. Issue fixed upon changing it to 4.12
I met this problem, this is how I soloved it:
Context:
SpringBoot application
Use maven to manage multiple modules
Add junit's maven dependency in root POM's dependencyManagement(rather than dependencies, their differences can be found here)
Intend to test class or folder inside one of the root module's child module
PS: If your situation does not match the context above, this solution may not solve your problem.
Steps
right click at the class or folder you want to test:
Choose More Run/Debug -> Modify Run Configuration
Change the module option to the one you want to test from root module
By default , maven looks at these folders for java and test classes respectively -
src/main/java and src/test/java
When the src is specified with the test classes under source and the scope for junit dependency in pom.xml is mentioned as test - org.unit will not be found by maven.