JSON serialization implemented

Author: luav

README.md

@@ -74,7 +74,7 @@ To explore the WebUI demo execute the following testcase
 ```sh
 $ MANUAL=1 python -m unittest mpetests.TestWebUI.test_failures
 ```
-and open http://localhost:8080 in the browser.
+and open http://localhost:8081 (or :8080) in the browser.
 
 ## Installation
 

mpepool.py

@@ -296,6 +296,7 @@ def propslist(cls):
 	- _props: set  - all public attributes of the class
 		and all __slots__ members even if the latter are underscored
 	- `in` operator support added to test membership in the _props
+	- json  - dict representation for the JSON serialization
 	- iterprop() method to iterate over the properties present in _props starting
 		from __slots__ in the order of declaration and then over the computed properties
 		in the alphabetical order
@@ -305,6 +306,12 @@ def contains(self, prop):
 		assert len(self._props) >= 2, 'At least 2 properties are expected'
 		return self._props.endswith(' ' + prop) or self._props.find(prop + ' ') != -1  #pylint: disable=W0212
 
+
+	def json(self):
+		"""Serialize self to the JSON representation"""
+		return {p: self.__getattribute__(p) if p != 'task' else self.__getattribute__(p).name for p in self.iterprop()}
+
+
 	def iterprop(cls):
 		"""Properties generator/iterator"""
 		ib = 0
@@ -327,6 +334,7 @@ def iterprop(cls):
 	# ATTENTION: the methods are bound automatically to self (but not to the cls in Python2)
 	# since they are defined before the class is created.
 	cls.__contains__ = contains
+	cls.json = json
 	cls.iterprop = types.MethodType(iterprop, cls)  # Note: required only in Python2 for the static methods
 	return cls
 
@@ -553,6 +561,11 @@ def __init__(self, data, ident=0, compound=None):
 		self.data = data
 
 
+	def json(self):
+		"""Serialize self to the JSON representation"""
+		return {p: self.__getattribute__(p) for p in self.__slots__}
+
+
 def unfoldDepthFirst(tinfext, indent=0):
 	"""Print TaskInfoExt hierarchy using the depth first traversing
 

mpewui.py

@@ -346,11 +346,17 @@ def __init__(self, workers=0, jobs=0, jobsDone=0, jobsFailed=0, tasksFailed=0
 		self.tasksRoot = tasksRoot
 		self.tasksRootFailed = tasksRootFailed
 
+
 	# @property
 	# def __dict__(self):
 	# 	return dict({p: self.__getattribute__(p) for p in self.__slots__})
 
 
+	def json(self):
+		"""Serialize self to the JSON representation"""
+		return {p: self.__getattribute__(p) for p in self.__slots__}
+
+
 class WebUiApp(threading.Thread):
 	"""WebUI App starting in the dedicated thread and providing remote interface to inspect ExecPool"""
 	RAM = None
@@ -510,8 +516,7 @@ def root(cmd):
 
 			# Expected format of data is a table: header, rows
 			if resopts.fmt == UiResFmt.json:
-				# TODO: implements JSON serializer
-				return json.dumps(cmd.data)
+				return json.dumps(cmd.data, default=lambda obj: obj.json())
 			elif resopts.fmt == UiResFmt.txt:
 				# 501  - Not Implemented
 				bottle.response.status = 501
@@ -582,8 +587,7 @@ def jobs(cmd):
 				return cmderr
 
 			if resopts.fmt == UiResFmt.json:
-				# TOFIX: implements JSON serializer
-				return json.dumps(cmd.data)
+				return json.dumps(cmd.data, default=lambda obj: obj.json())
 			elif resopts.fmt == UiResFmt.txt:
 				# 501  - Not Implemented
 				bottle.response.status = 501
@@ -647,8 +651,7 @@ def tasks(cmd):
 				return cmderr
 
 			if resopts.fmt == UiResFmt.json:
-				# TOFIX: implements JSON serializer
-				return json.dumps(cmd.data)
+				return json.dumps(cmd.data, default=lambda obj: obj.json())
 			elif resopts.fmt == UiResFmt.txt:
 				# 501  - Not Implemented
 				bottle.response.status = 501