wip: filesystem as a service.

bonobo/strategies/__init__.py

@@ -1,8 +1,42 @@
-from bonobo.strategies.executor import ThreadPoolExecutorStrategy, ProcessPoolExecutorStrategy
+from bonobo.strategies.executor import ProcessPoolExecutorStrategy, ThreadPoolExecutorStrategy
 from bonobo.strategies.naive import NaiveStrategy
 
 __all__ = [
-    'NaiveStrategy',
-    'ProcessPoolExecutorStrategy',
-    'ThreadPoolExecutorStrategy',
+    'create_strategy',
 ]
+
+STRATEGIES = {
+    'naive': NaiveStrategy,
+    'processpool': ProcessPoolExecutorStrategy,
+    'threadpool': ThreadPoolExecutorStrategy,
+}
+
+DEFAULT_STRATEGY = 'threadpool'
+
+
+def create_strategy(name=None):
+    """
+    Create a strategy, or just returns it if it's already one.
+    
+    :param name: 
+    :return: Strategy
+    """
+    from bonobo.strategies.base import Strategy
+    import logging
+
+    if isinstance(name, Strategy):
+        return name
+
+    if name is None:
+        name = DEFAULT_STRATEGY
+
+    logging.debug('Creating strategy {}...'.format(name))
+
+    try:
+        factory = STRATEGIES[name]
+    except KeyError as exc:
+        raise RuntimeError(
+            'Invalid strategy {}. Available choices: {}.'.format(repr(name), ', '.join(sorted(STRATEGIES.keys())))
+        ) from exc
+
+    return factory()