TopologyManagementService

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

	Attribute	Type	Description
tags	site	String	site name
	appName	String	application/topology name
fields	mainClass	String	application main class
	jarFile	String	jar file path
	configFile	String	application configuration file path
	deployEnvironment	String	cluster name
	status	String	{SUCCESS, FAILURE}

NEW
1. create a topology definition entity
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
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