Objective

To have a better user experience with EAGLE ui, we could provide an interface to manage a certain topology via the ui page, such as submit a topology

Schema

Application Definition 

• Service name: ApplicationExecutionService
• Table name: eagle_metadata
• Prefix: application_execution

Cluster Definition

• Service name: ClusterDefinitionService
• Table name: eagle_metadata
• Prefix: application_execution_cluster

Use cases

1. NEW
   1. create a topology definition entity
2. START
   1. click START button
   2. check the topology's current status on the nimbus host
   3. a new thread is created to execute the submitting topology task
   4. update status
3. STOP
   1. click STOP button
   2. check the topology's current status on nimbus host
   3. a new thread is created to stop the topology
   4. update status