Eclipse EMF RAP Target Components

Question

Good day all,

I am attempting to get an Eclipse RAP application running with EMF support. Following the steps from the Eclipse wiki (https://wiki.eclipse.org/RAP/EMF_Integration) as closely as possible (it's dated four years ago), I am putting the following packages into my Target definition:

• EMF RAP Target Components
• RAP Basic Equinox Target
• RAP Runtime

This gives me the following Target definition:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<?pde version="3.8"?>
<target name="SCRAMSTargetDefinition" sequenceNumber="17">
    <locations>
        <location includeAllPlatforms="false" includeConfigurePhase="true" includeMode="planner" includeSource="true" type="InstallableUnit">
            <unit id="org.eclipse.emf.rap.sdk.feature.group" version="2.13.0.v20170609-0928"/>
            <unit id="org.eclipse.rap.equinox.target.feature.feature.group" version="3.2.0.20170613-1148"/>
            <unit id="org.eclipse.rap.feature.feature.group" version="3.2.0.20170609-1144"/>
            <repository location="http://download.eclipse.org/releases/oxygen/"/>
        </location>
    </locations>
</target>

The Target will not resolve though, giving me the following dependency errors:

Problems occurred while resolving the target contents
    Cannot complete the install because one or more required items could not be found.
        Cannot satisfy dependency:
            From: EMF RAP Runtime 2.13.0.v20170609-0928 (org.eclipse.emf.rap.feature.group 2.13.0.v20170609-0928)
            To: org.eclipse.emf.rap.edit.ui.feature.group [2.9.0.v20170609-0928]
        Cannot satisfy dependency:
            From: EMF RAP Target Components  2.13.0.v20170609-0928 (org.eclipse.emf.rap.sdk.feature.group 2.13.v20170609-0928)
            To: org.eclipse.emf.rap.feature.group [2.13.0.v20170609-0928]
        Missing requirement: EMF RAP Edit UI 2.9.0.v20170609-0928 (org.eclipse.emf.rap.edit.ui.feature.group 2.9.0.v20170609-0928) requires 'A.PDE.Target.Platform Cannot be installed into the IDE 0.0.0' but it could not be found
        Software being installed: EMF RAP Target Components 2.13.0.v20170609-0928 (org.eclipse.emf.rap.sdk.feature.group 2.13.0.v20170609-0928)

Buried in there is A.PDE.Target.Platform Cannot be installed into the IDE 0.0.0, which would seem to be the core problem - but this is a Target Definition, not the IDE itself, so I'm not understanding why it's complaining in this way.

I have tried including combinations of other EMF packages into the Target Definition, but nothing has helped. Any guidance would be appreciated.

Answer 1

I found the answer in the Eclipse Forums:

When adding the update site to the target definition, the Include required software option has to be disabled. This is equivalent to switching includeMode from planner to slicer. In addition to that, you might want to enable the Include all environments option (set includeAllPlatforms to true).

Please note that these settings have to be the same for all locations (if the target definition includes more than one location / update site).