Massive renaming!

29-actors/README.md

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+Style #28
+==============================
+
+Similar to the letterbox style, but where the 'things' have
+independent threads of execution.
+
+Constraints:
+
+- The larger problem is decomposed into 'things' that make sense for
+  the problem domain 
+
+- Each 'thing' has a queue meant for other \textit{things} to place
+messages in it
+
+- Each 'thing' is a capsule of data that exposes only its
+ability to receive messages via the queue
+
+- Each 'thing' has its own thread of execution independent of the
+others.
+
+Possible names:
+
+- Free agents
+- Active letterbox
+- Actors

29-actors/tf-29.py

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+#!/usr/bin/env python
+import sys, re, operator, string
+from threading import Thread
+from queue import Queue
+
+class ActiveWFObject(Thread):
+    def __init__(self):
+        Thread.__init__(self)
+        self.name = str(type(self))
+        self.queue = Queue()
+        self._stopMe = False
+        self.start()
+
+    def run(self):
+        while not self._stopMe:
+            message = self.queue.get()
+            self._dispatch(message)
+            if message[0] == 'die':
+                self._stopMe = True
+
+def send(receiver, message):
+    receiver.queue.put(message)
+
+class DataStorageManager(ActiveWFObject):
+    """ Models the contents of the file """
+    _data = ''
+
+    def _dispatch(self, message):
+        if message[0] == 'init':
+            self._init(message[1:])
+        elif message[0] == 'send_word_freqs':
+            self._process_words(message[1:])
+        else:
+            # forward
+            send(self._stop_word_manager, message)
+ 
+    def _init(self, message):
+        path_to_file = message[0]
+        self._stop_word_manager = message[1]
+        with open(path_to_file) as f:
+            self._data = f.read()
+        pattern = re.compile('[\W_]+')
+        self._data = pattern.sub(' ', self._data).lower()
+
+    def _process_words(self, message):
+        recipient = message[0]
+        data_str = ''.join(self._data)
+        words = data_str.split()
+        for w in words:
+            send(self._stop_word_manager, ['filter', w])
+        send(self._stop_word_manager, ['top25', recipient])
+
+class StopWordManager(ActiveWFObject):
+    """ Models the stop word filter """
+    _stop_words = []
+
+    def _dispatch(self, message):
+        if message[0] == 'init':
+            self._init(message[1:])
+        elif message[0] == 'filter':
+            return self._filter(message[1:])
+        else:
+            # forward
+            send(self._word_freqs_manager, message)
+ 
+    def _init(self, message):
+        with open('../stop_words.txt') as f:
+            self._stop_words = f.read().split(',')
+        self._stop_words.extend(list(string.ascii_lowercase))
+        self._word_freqs_manager = message[0]
+
+    def _filter(self, message):
+        word = message[0]
+        if word not in self._stop_words:
+            send(self._word_freqs_manager, ['word', word])
+
+class WordFrequencyManager(ActiveWFObject):
+    """ Keeps the word frequency data """
+    _word_freqs = {}
+
+    def _dispatch(self, message):
+        if message[0] == 'word':
+            self._increment_count(message[1:])
+        elif message[0] == 'top25':
+            self._top25(message[1:])
+ 
+    def _increment_count(self, message):
+        word = message[0]
+        if word in self._word_freqs:
+            self._word_freqs[word] += 1 
+        else: 
+            self._word_freqs[word] = 1
+
+    def _top25(self, message):
+        recipient = message[0]
+        freqs_sorted = sorted(self._word_freqs.items(), key=operator.itemgetter(1), reverse=True)
+        send(recipient, ['top25', freqs_sorted])
+
+class WordFrequencyController(ActiveWFObject):
+
+    def _dispatch(self, message):
+        if message[0] == 'run':
+            self._run(message[1:])
+        elif message[0] == 'top25':
+            self._display(message[1:])
+        else:
+            raise Exception("Message not understood " + message[0])
+ 
+    def _run(self, message):
+        self._storage_manager = message[0]
+        send(self._storage_manager, ['send_word_freqs', self])
+
+    def _display(self, message):
+        word_freqs = message[0]
+        for (w, f) in word_freqs[0:25]:
+            print(w, ' - ', f)
+        send(self._storage_manager, ['die'])
+        self._stopMe = True
+
+#
+# The main function
+#
+word_freq_manager = WordFrequencyManager()
+
+stop_word_manager = StopWordManager()
+send(stop_word_manager, ['init', word_freq_manager])
+
+storage_manager = DataStorageManager()
+send(storage_manager, ['init', sys.argv[1], stop_word_manager])
+
+wfcontroller = WordFrequencyController()
+send(wfcontroller, ['run', storage_manager])
+
+# Wait for the active objects to finish
+[t.join() for t in [word_freq_manager, stop_word_manager, storage_manager, wfcontroller]]