Spring Cloud Data Flow offers RESTful APIs around applications, streams, tasks, jobs, and metrics. A complete list can be obtained by sending a GET request to http://localhost:9393/.

The following screenshot shows the response for the GET request:

All the APIs are self-explanatory. Let's look at an example of sending a GET request to http://localhost:9393/streams/definitions:

{  
  "_embedded":{  
  "streamDefinitionResourceList":[  
         {  
            "name":"process-stock-change-events"
            "dslText":"significant-stock-change-source|stock-
            intelligence-processor|event-store-sink",
            "status":"deployed",
            "statusDescription":"All apps have been successfully
             deployed",
            "_links":{  
               "self":{  
                  "href":"http://localhost:9393/streams/definitions/
                   process-stock-change-events"
               }
            }
         }
      ]
   },
   "_links":{  
      "self":{  
         "href":"http://localhost:9393/streams/definitions"
      }
   },
   "page":{
      "size":20,
      "totalElements":1,
      "totalPages":1,
      "number":0
   }
}

Important things to note are as follows:

• The API is RESTful. _embedded element contains the data for the request. _links element contains HATEOAS links. The page element contains pagination information.
• _embedded.streamDefinitionResourceList.dslText contains the definition of the stream "significant-stock-change-source|stock-intelligence-processor|event-store-sink".
• _embedded.streamDefinitionResourceList.status