CODEWITHSUNDEEP
javamavendependencies
johnny-b-goode
johnny-b-goode

Reputation: 3893

Dependency is disappeared after changing scope to runtime

I need to use some jar dependency in runtime scope, but after changing it in pom.xml this dependency disappeared from dependency list. Classes from this dependency is used during compiling and running, so i need this dependency to be at runtime scope.

Upvotes: 0

Views: 85

Answers (3)

maba
maba

Reputation: 48075

You might want to read about Maven Dependency scopes. The default scope is compile and you should not change that unless you absolutely must.

  • compile - this is the default scope, used if none is specified. Compile dependencies are available in all classpaths.

  • runtime - this scope indicates that the dependency is not required for compilation, but is for execution. It is in the runtime and test classpaths, but not the compile classpath.

The easiest way to run some class in your project is to use the exec-maven-plugin.

<build>
    <plugins>
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>exec-maven-plugin</artifactId>
            <version>1.2.1</version>
            <executions>
                <execution>
                    <goals>
                        <goal>java</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <mainClass>com.example.Main</mainClass>
            </configuration>
        </plugin>
    </plugins>
</build>

Now you can run the project like this:

mvn package exec:java

That is easy and you don't have to think about the classpath setup.

Upvotes: 2

Nicola Musatti
Nicola Musatti

Reputation: 18228

If you need classes from your dependency while compiling then you should use compile scope, which is the default.

In order to run your application you need all of the dependent jars to be on the classpath. You can use Maven in various ways to achieve that, but the correct scope is still compile.

Upvotes: 2

alexei-grigoriev
alexei-grigoriev

Reputation: 199

If You use the classes from dependency in compilation, You need "compile" scope. Runtime dependency is not in compile classpath.

Upvotes: 3

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