@POST @ApiIgnore // until documented
  @Path("{instanceID}")
  @Produces("text/plain")
  public Response createInstance(String body, @Context HttpHeaders headers, @Context UriInfo ui,
                             @PathParam("instanceID") String instanceID) {

    return handleRequest(headers, body, ui, Request.Type.POST,
        createInstanceResource(m_feedName, instanceID, ui));
  }
Handles POST /feeds/{feedID}/instances/{instanceID}
Create a specific instance.

@param body     http body
@param headers  http headers
@param ui       uri info
@param instanceID instance id

@return instance resource representation
ambari-server/src/main/java/org/apache/ambari/server/api/services/InstanceService.java