Switch stop/run job actions to EC tasks

ui/app/components/job-page/parts/title.js

@@ -1,4 +1,5 @@
 import Component from '@ember/component';
+import { task } from 'ember-concurrency';
 import messageFromAdapterError from 'nomad-ui/utils/message-from-adapter-error';
 
 export default Component.extend({
@@ -9,46 +10,37 @@ export default Component.extend({
 
   handleError() {},
 
-  actions: {
-    stopJob() {
-      this.get('job')
-        .stop()
-        .catch(() => {
-          this.get('handleError')({
-            title: 'Could Not Stop Job',
-            description: 'Your ACL token does not grant permission to stop jobs.',
-          });
-        });
-    },
+  stopJob: task(function*() {
+    try {
+      yield this.get('job').stop();
+    } catch (err) {
+      this.get('handleError')({
+        title: 'Could Not Stop Job',
+        description: 'Your ACL token does not grant permission to stop jobs.',
+      });
+    }
+  }),
 
-    startJob() {
-      const job = this.get('job');
-      job
-        .fetchRawDefinition()
-        .then(definition => {
-          // A stopped job will have this Stop = true metadata
-          // If Stop is true when submitted to the cluster, the job
-          // won't transition from the Dead to Running state.
-          delete definition.Stop;
-          job.set('_newDefinition', JSON.stringify(definition));
-        })
-        .then(() => {
-          return job.parse();
-        })
-        .then(() => {
-          return job.update();
-        })
-        .catch(err => {
-          let message = messageFromAdapterError(err);
-          if (!message || message === 'Forbidden') {
-            message = 'Your ACL token does not grant permission to stop jobs.';
-          }
+  startJob: task(function*() {
+    const job = this.get('job');
+    const definition = yield job.fetchRawDefinition();
 
-          this.get('handleError')({
-            title: 'Could Not Start Job',
-            description: message,
-          });
-        });
-    },
-  },
+    delete definition.Stop;
+    job.set('_newDefinition', JSON.stringify(definition));
+
+    try {
+      yield job.parse();
+      yield job.update();
+    } catch (err) {
+      let message = messageFromAdapterError(err);
+      if (!message || message === 'Forbidden') {
+        message = 'Your ACL token does not grant permission to stop jobs.';
+      }
+
+      this.get('handleError')({
+        title: 'Could Not Start Job',
+        description: message,
+      });
+    }
+  }),
 });

ui/app/templates/components/job-page/parts/title.hbs

@@ -9,7 +9,7 @@
       cancelText="Cancel"
       confirmText="Yes, Stop"
       confirmationMessage="Are you sure you want to stop this job?"
-      onConfirm=(action "stopJob")}}
+      onConfirm=(perform stopJob)}}
   {{else}}
     {{two-step-button
       data-test-start
@@ -17,6 +17,6 @@
       cancelText="Cancel"
       confirmText="Yes, Start"
       confirmationMessage="Are you sure you want to start this job?"
-      onConfirm=(action "startJob")}}
+      onConfirm=(perform startJob)}}
   {{/if}}
 </h1>