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batch/models/job_state_machine.js

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+'use strict';
+
+var assert = require('assert');
+var JobStatus = require('../job_status');
+var validStatusTransitions = [
+    [JobStatus.PENDING, JobStatus.RUNNING],
+    [JobStatus.PENDING, JobStatus.CANCELLED],
+    [JobStatus.PENDING, JobStatus.UNKNOWN],
+    [JobStatus.PENDING, JobStatus.SKIPPED],
+    [JobStatus.RUNNING, JobStatus.DONE],
+    [JobStatus.RUNNING, JobStatus.FAILED],
+    [JobStatus.RUNNING, JobStatus.CANCELLED],
+    [JobStatus.RUNNING, JobStatus.PENDING],
+    [JobStatus.RUNNING, JobStatus.UNKNOWN]
+];
+
+function JobStateMachine () {
+}
+
+module.exports = JobStateMachine;
+
+JobStateMachine.prototype.isValidTransition = function (initialStatus, finalStatus) {
+    var transition = [ initialStatus, finalStatus ];
+
+    for (var i = 0; i < validStatusTransitions.length; i++) {
+        try {
+            assert.deepEqual(transition, validStatusTransitions[i]);
+            return true;
+        } catch (e) {
+            continue;
+        }
+    }
+
+    return false;
+};
+
+JobStateMachine.prototype.isFinalStatus = function (status) {
+    return JobStatus.isFinal(status);
+};