package org.apache.hadoop.gateway.deploy;
import org.apache.hadoop.gateway.topology.Service;
public interface ServiceDeploymentContributor {
  // TheAn roleextension ofto thisbase serviceinterface deploymentfor contributor.backward compatibility e.g. WEBHDFS
  String getRole();

  // The name of this service deployment contributor.  Not used yet.
  String getName();
 with existing contributors.
// Service located and loaded via the base interface.
public interface VersionedServiceDeploymentContributor extends ServiceDeploymentContributor {
  // The listversions supported ofby versionsthis supportedcontributor.
  Each element formatted// Formatted according to the Maven Enforcer plugin syntax.
  String[] getVersions();

  // Called after provider initializeContribution methods and in arbitrary order relative to other service contributors.
  void initializeContribution( DeploymentContext context );

  // Called per service based on the service's role.// http://maven.apache.org/enforcer/enforcer-rules/versionRanges.html
  // ReturnsReturning anull listindicates ofthat resourcesall itversions addedare tosupported theand descriptor.
is equivalent void contributeService( DeploymentContext context, Service service ) throws Exception;
to "[0,)"
  // Called after all contributors and before provider finalizeContribution methods.
  void finalizeContribution( DeploymentContext context String getVersions();
}

<topology>
    <gateway>
    ...
    </gateway>
    ....
    <service>
        <role>HIVE</role>
        <version>0.13.0</version>
        <url>http://localhost:10001/cliservice</url>
        <version>0.13.0</version>
    </service>
</topology>