How do I access classes from a different Plug-In

[Martin Mintál]

Hi, I am trying to adjust a JIRA plug-in which needs to use classes from a different plug-in of ours (in order to copy a custom field whose type is defined in that "different" plug-in). Both plug-ins are JIRA 7.x

I've found some older "manuals" or forum entries describing this very same issue, but was still unable to solve it. My (second) plug-in either is unable to start or the particular class is not found (ClassNotFound, ClassDeffNotFound) dependent on the particular configuration. 

At my last attempt, I've made the following adjustments to my pom.xml and atlassian-plugin.xml respectively:

pom.xml (1)

@see the <instructions> tag

<build>
  <plugins>
    <plugin>
      <groupId>com.atlassian.maven.plugins</groupId>
      <artifactId>maven-jira-plugin</artifactId>
      <version>${amps.version}</version>
      <extensions>true</extensions>
      <configuration>
        <productVersion>${jira.version}</productVersion>
        <productDataVersion>${jira.version}</productDataVersion>
          <jvmArgs>-Xmx2g</jvmArgs>
            <instructions>
              <Export-Package>
                de.xx.jira_tools
              </Export-Package>
            </instructions>
      </configuration>
    </plugin>
    <plugin>
      <artifactId>maven-compiler-plugin</artifactId>
        <version>3.6.1</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
    </plugin>
  </plugins>
</build>

atlassian-plugin.xml (1)

no changes here

pom.xml (2)

<dependency>
    <groupId>de.xx.jira_tools</groupId>
    <artifactId>component-manager</artifactId>
    <version>3.0.4</version>
    <scope>provided</scope>
</dependency>

<plugin>
  <groupId>com.atlassian.maven.plugins</groupId>
  <artifactId>maven-jira-plugin</artifactId>
  <version>${amps.version}</version>
  <extensions>true</extensions>
  <configuration>
    <productVersion>${jira.version}</productVersion>
    <productDataVersion>${jira.version}</productDataVersion>
      <instructions>
        <Import-Package>
          de.xx.jira_tools.*
        </Import-Package>
      </instructions> 
  </configuration>
</plugin>

atlassian-plugin.xml (2)

<custom-field-mapper key="ctSelectorMapper" 
  class="de.xx.cpi.fields.custom.ComponentTopicSelectorMapper"/>

Thank you very much for your help!

MARTIN MINTÁL