code: public ServiceFuture<JobAgentInner> beginCreateOrUpdateAsync(String resourceGroupName, String serverName, String jobAgentName, JobAgentInner parameters, final ServiceCallback<JobAgentInner> serviceCallback) {
          return ServiceFuture.fromResponse(beginCreateOrUpdateWithServiceResponseAsync(resourceGroupName, serverName, jobAgentName, parameters), serviceCallback);
      }
docs: Creates or updates a job agent.
  
  @param resourceGroupName The name of the resource group that contains the resource. You can obtain this value from the Azure Resource Manager API or the portal.
  @param serverName The name of the server.
  @param jobAgentName The name of the job agent to be created or updated.
  @param parameters The requested job agent resource state.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object