added rest

lib/tasks/task.py

@@ -0,0 +1,60 @@
+'''
+Created on Jun 15, 2013
+
+@author: Rafael Timmerberg
+'''
+
+class Task:
+    '''
+    Base class for all built-in Tasks.
+    '''
+    
+    def set_task_type(self, taskType):
+        '''
+        sets the type of this task.
+        
+        Be aware! this method can only get called once!
+        
+        params:
+            taskType: the type of this task
+        '''
+        if hasattr(self, "_taskType"):
+            raise Exception("taskType is only allowed to set once!")
+        self.taskType = taskType  
+    
+    def get_task_type(self):
+        '''
+        returns the type set by set_type_task
+        '''
+        return self._taskType
+    
+    def execute_task(self, msg):
+        '''
+        this is the method tasks usually override. 
+        It gets called anytime the task should get executed
+        
+        default does nothing
+        
+        params:
+            msg: the msg for this task
+        '''
+        pass
+    
+    def _execute(self,taskType, msg):
+        '''
+        internal method which gets called for any member in a hostgroup.
+        It determines if it has an appropriate type by comparing taskType with get_task_type().
+        Calls execute_task() if the type matches
+        
+        params: 
+            taskType: the type of the fail which is compared with get_task_type()
+            msg: the error message
+            
+        return: 
+            True if execute_task() is called succesfully, else False
+        '''
+        if self.get_task_type() == taskType:
+            self.execute_task(msg)
+            return True
+        return False
+