From 807478953ab6a5402ab9d7c353ad683cd5cc6bc9 Mon Sep 17 00:00:00 2001
From: Takuji Kawata <takuji.kawata@gmail.com>
Date: Sun, 20 Aug 2017 21:56:30 +0900
Subject: [PATCH] Fixed fake_sensor.py

Added value and register_callback to FakeSensor, they are needed for topic_sensor publishers in the book.
---
 code/stuff/fake_sensor.py | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/code/stuff/fake_sensor.py b/code/stuff/fake_sensor.py
index 81338c0..f993b9c 100755
--- a/code/stuff/fake_sensor.py
+++ b/code/stuff/fake_sensor.py
@@ -50,13 +50,23 @@ def run(self):
 class FakeSensor:
     def __init__(self):
         thread = threading.Thread(target=self.run)
-        thread.daemon = True
+        thread.daemon = False
         thread.start()
+        self.cv = threading.Condition()
+        with self.cv:
+	        self.cv.wait()
 
     def run(self):
         self.sensor = ActualFakeSensor()
+        with self.cv:
+            self.cv.notify()
         self.sensor.run()
 
+    def value(self):
+        return self.sensor.value()
+
+    def register_callback(self, callback):
+        self.sensor.register_callback(callback)
 
 if __name__ == '__main__':
     sensor = FakeSensor()