adds application control (start, stop, restart) commands (#43)

This commit adds new commands for controlling platform applications.  It
adds the following commands:

- `start application ...`
- `stop application...`
- `restart application ...`

Author: privateip

internal/handlers/descriptors/adapters.yaml

@@ -50,6 +50,7 @@ edit:
 #############################################################################
 # Import/Export commands
 #############################################################################
+
 import:
   use: adapter <name>
   group: admin-essentials

internal/handlers/descriptors/applications.yaml

@@ -7,3 +7,20 @@ inspect:
   use: applications
   description: |
     Show application status
+
+start:
+  use: application <name>
+  description: |
+    Start a stopped application
+
+stop:
+  use: application <name>
+  description: |
+    Stop a running application
+
+restart:
+  use: application <name>
+  description: |
+    Restart an application
+
+

internal/runners/applications.go

@@ -27,6 +27,48 @@ func NewApplicationRunner(c client.Client, cfg *config.Config) *ApplicationRunne
 	}
 }
 
+func (r *ApplicationRunner) Start(in Request) (*Response, error) {
+	logger.Trace()
+
+	name := in.Args[0]
+
+	if err := r.service.Start(name); err != nil {
+		return nil, err
+	}
+
+	return NewResponse(
+		fmt.Sprintf("Successfully started application `%s`", name),
+	), nil
+}
+
+func (r *ApplicationRunner) Stop(in Request) (*Response, error) {
+	logger.Trace()
+
+	name := in.Args[0]
+
+	if err := r.service.Stop(name); err != nil {
+		return nil, err
+	}
+
+	return NewResponse(
+		fmt.Sprintf("Successfully stopped application `%s`", name),
+	), nil
+}
+
+func (r *ApplicationRunner) Restart(in Request) (*Response, error) {
+	logger.Trace()
+
+	name := in.Args[0]
+
+	if err := r.service.Restart(name); err != nil {
+		return nil, err
+	}
+
+	return NewResponse(
+		fmt.Sprintf("Successfully restarted application `%s`", name),
+	), nil
+}
+
 func (r *ApplicationRunner) Inspect(in Request) (*Response, error) {
 	logger.Trace()