Starting from version 1.9, JCR Service supports REST services creation on Groovy script.

The feature bases on RESTful framework and uses ResourceContainer concept.

Scripts should extend ResourceContainer and should be stored in JCR as a node of type exo:groovyResourceContainer.

Detailed REST services step-by-step implementation check there Create REST service step by step.

Component configuration enables Groovy services loader:

<component>
  <type>org.exoplatform.services.jcr.ext.script.groovy.GroovyScript2RestLoader</type>
  <init-params>
    <object-param>
      <name>observation.config</name>
      <object type="org.exoplatform.services.jcr.ext.script.groovy.GroovyScript2RestLoader$ObservationListenerConfiguration">
        <field name="repository">
          <string>repository</string>
        </field>
        <field name="workspaces">
          <collection type="java.util.ArrayList">
            <value>
              <string>collaboration</string>
            </value>
          </collection>
        </field>
      </object>
    </object-param>
  </init-params>
</component>