vFW and vDNS support added to azure-plugin

[multicloud/azure.git] / azure / aria / aria-extension-cloudify / src / aria / aria / orchestrator / workflows / executor / thread.py

diff --git a/azure/aria/aria-extension-cloudify/src/aria/aria/orchestrator/workflows/executor/thread.py b/azure/aria/aria-extension-cloudify/src/aria/aria/orchestrator/workflows/executor/thread.py
new file mode 100644 (file)
index 0000000..170620e
--- /dev/null
+++ b/azure/aria/aria-extension-cloudify/src/aria/aria/orchestrator/workflows/executor/thread.py
@@ -0,0 +1,79 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+Thread task executor.
+"""
+
+import Queue
+import threading
+
+import sys
+
+from aria.utils import imports, exceptions
+
+from .base import BaseExecutor
+
+
+class ThreadExecutor(BaseExecutor):
+    """
+    Thread task executor.
+
+    It's easier writing tests using this executor rather than the full-blown sub-process executor.
+
+    Note: This executor is incapable of running plugin operations.
+    """
+
+    def __init__(self, pool_size=1, close_timeout=5, *args, **kwargs):
+        super(ThreadExecutor, self).__init__(*args, **kwargs)
+        self._stopped = False
+        self._close_timeout = close_timeout
+        self._queue = Queue.Queue()
+        self._pool = []
+        for i in range(pool_size):
+            name = 'ThreadExecutor-{index}'.format(index=i+1)
+            thread = threading.Thread(target=self._processor, name=name)
+            thread.daemon = True
+            thread.start()
+            self._pool.append(thread)
+
+    def _execute(self, ctx):
+        self._queue.put(ctx)
+
+    def close(self):
+        self._stopped = True
+        for thread in self._pool:
+            if self._close_timeout is None:
+                thread.join()
+            else:
+                thread.join(self._close_timeout)
+
+    def _processor(self):
+        while not self._stopped:
+            try:
+                ctx = self._queue.get(timeout=1)
+                self._task_started(ctx)
+                try:
+                    task_func = imports.load_attribute(ctx.task.function)
+                    arguments = dict(arg.unwrapped for arg in ctx.task.arguments.itervalues())
+                    task_func(ctx=ctx, **arguments)
+                    self._task_succeeded(ctx)
+                except BaseException as e:
+                    self._task_failed(ctx,
+                                      exception=e,
+                                      traceback=exceptions.get_exception_as_string(*sys.exc_info()))
+            # Daemon threads
+            except BaseException as e:
+                pass