Fix: list_applications throwing error (#692)

* Fixed Client.cluster.list_applications function to return [aztk.models.Task] since it was previously throwing errors.

* Updated documentation for the base _list_applications function.

* Updated to return a list of aztk.spark.models.Application instances instead of the raw tasks as would be expected by the name. Also updated documentation to reflect this change.

aztk/spark/client/base/helpers/list_applications.py

@@ -2,22 +2,17 @@
 from azure.batch.models import BatchErrorException
 
 from aztk import error
-from aztk.spark import models
+from aztk.spark.models import Application, SchedulingTarget
 from aztk.utils import helpers
 
 
-def _list_applications(core_operations, id):
-    # info about the app
-    scheduling_target = core_operations.get_cluster_configuration(id).scheduling_target
-    if scheduling_target is not models.SchedulingTarget.Any:
-        return models.Application(core_operations.list_applications(id))
-
-    recent_run_job = core_operations.get_recent_job(id)
-    return core_operations.list_batch_tasks(id=recent_run_job.id)
-
-
-def list_applications(core_operations, id):
+def list_applications(core_operations, cluster_id):
     try:
-        return models.Application(_list_applications(core_operations, id))
+        scheduling_target = core_operations.get_cluster_configuration(cluster_id).scheduling_target
+        if scheduling_target is not SchedulingTarget.Any:
+            tasks = core_operations.list_task_table_entries(cluster_id)
+        else:
+            tasks = core_operations.list_batch_tasks(cluster_id)
+        return [Application(task) for task in tasks]
     except BatchErrorException as e:
         raise error.AztkError(helpers.format_batch_exception(e))

aztk/spark/client/base/operations.py

@@ -72,14 +72,13 @@ def _generate_application_task(self, core_base_operations, container_id, applica
         return generate_application_task.generate_application_task(core_base_operations, container_id, application,
                                                                    remote)
 
-    def list_applications(self, id):
-        """Get information on a submitted application
+    def _list_applications(self, core_base_operations, id):
+        """Get information on tasks submitted to a cluster
 
         Args:
-            id (:obj:`str`): the name of the job the application was submitted to
-            application_name (:obj:`str`): the name of the application to get
+            id (:obj:`str`): the name of the cluster the tasks belong to
 
         Returns:
-            :obj:`aztk.spark.models.Application`: object representing that state and output of an application
+            :obj:`[aztk.spark.models.Application]`: list of aztk applications
         """
-        return list_applications.list_applications(self, id)
+        return list_applications.list_applications(core_base_operations, id)

aztk/spark/client/cluster/operations.py

@@ -117,6 +117,17 @@ def get_application_state(self, id: str, application_name: str):
         """
         return get_application_state.get_application_state(self._core_cluster_operations, id, application_name)
 
+    def list_applications(self, id: str):
+        """Get all tasks that have been submitted to the cluster
+
+        Args:
+            id (:obj:`str`): the name of the cluster the tasks belong to
+
+        Returns:
+            :obj:`[aztk.spark.models.Application]`: list of aztk applications
+        """
+        return self._list_applications(self._core_cluster_operations, id)
+
     def run(self, id: str, command: str, host=False, internal: bool = False, timeout=None):
         """Run a bash command on every node in the cluster