def handle_cameras(self,req):
"""
Hanldes requests to start and stop the cameras found by the inspector
nodes.
"""
response = True
message = ''
cmd = req.command
cmd = cmd.lower()
if cmd == 'start':
if not self.camera_running:
self.launch_camera_nodes()
self.camera_running = True
else:
response = False
message = 'cameras already running'
elif cmd == 'stop':
if self.camera_running:
self.camera_nodes_clean_up()
self.camera_running = False
else:
response = False
message = 'cameras not running'
else:
response = False
message = 'unknow command'.format(cmd)
return CommandStringResponse(response,message)
def handle_camera_srv(self, request):
"""
Handes requests for camera services. Starts and stops the camera nodes.
"""
command = request.command
command = command.lower()
response = True
message = ''
if command == 'start':
if self.camera_popen is None:
self.launch_camera_nodes()
else:
repsonse = False
message = 'camera nodes already started'
elif command == 'stop':
if self.camera_popen is not None:
print('stop')
self.kill_camera_nodes()
else:
response = False
message = 'camera nodes not running'
else:
response = False
message = 'uknown request: {0}'.format(request)
return CommandStringResponse(response, message)
def handle_mjpeg_servers_srv(self, req):
"""
Handles request for starting and stoping the mjpeg servers. Creates a dictionary
of mjpeg server information.
"""
cmd = req.command
cmd = cmd.lower()
response = True
message = ''
if cmd == 'start':
# Start mjpeg servers if they haven't already been started
if not self.server_running:
self.launch_mjpeg_servers()
else:
response = False
message = 'mjpeg servers already running'
elif cmd == 'stop':
# Stop mjpeg servers if they are running
if self.server_running:
self.kill_mjpeg_servers()
self.delete_server_launch_file()
else:
repsonse = False
message = 'mjpeg servers not running'
else:
response = False
message = 'unknown command {0}'.format(cmd)
return CommandStringResponse(response, message)
def handle_unlock_srv(self, req):
"""
Try to release access lock
"""
node_name = req.command
flag = True
message = ''
with self.lock:
if self.access_lock_owner is not None:
if node_name == self.access_lock_owner:
self.access_lock_owner = None
else:
flag = False
message = 'cannot unlock - not lock owner'
return CommandStringResponse(flag, message)
def handle_lock_srv(self, req):
"""
Try to acquire access lock
"""
node_name = req.command
flag = True
message = ''
with self.lock:
if (self.access_lock_owner is None) or (self.access_lock_owner
== node_name):
self.access_lock_owner = node_name
else:
flag = False
message = 'cannot lock - lock already owned'
return CommandStringResponse(flag, message)
def handle_corrector_srv(self, req):
"""
Handles requests to launch/kill the frame drop corrector nodes.
"""
command = req.command.lower()
response = True
message = ''
if command == 'start':
if self.corrector_popen is None:
self.launch_correctors()
else:
response = False
message = 'frame drop correctors already running'
elif command == 'stop':
if self.corrector_popen is not None:
self.kill_correctors()
else:
response = False
message = 'frame drop correctors not running'
return CommandStringResponse(response, message)
def handle_labeler_srv(self, req):
"""
Handles requests to launch/kill the stitched image labeler nodes
"""
command = req.command.lower()
response = True
message = ''
if command == 'start':
if self.labeler_popen is None:
self.launch_labelers()
else:
response = False
message = 'stitched image labelers already running'
elif command == 'stop':
if self.labeler_popen is not None:
self.kill_labelers()
else:
response = False
message = 'stitched image labelers not running'
return CommandStringResponse(response, message)
def handle_zoom_tool_srv(self,req):
"""
Handles requests to launch/kill the zoom tool nodes.
"""
command = req.command.lower()
response = True
message = ''
if command == 'start':
if self.zoom_tool_popen is None:
self.launch_zoom_tools()
else:
response = False
message = 'zoom tools already running'
elif command == 'stop':
if self.zoom_tool_popen is not None:
self.kill_zoom_tools()
else:
response = False
message = 'zoom tools not running'
return CommandStringResponse(response,message)
def handle_image_proc_srv(self,req):
"""
Handles requests to lauch/kill the image proc nodes.
"""
command = req.command.lower()
response = True
message = ''
if command == 'start':
if self.image_proc_popen is None:
self.launch_image_proc_nodes()
else:
response = False
message = 'image proc nodes already running'
elif command == 'stop':
if self.image_proc_popen is not None:
self.kill_image_proc_nodes()
else:
response = False
message = 'image proc nodes not running'
else:
response = False
message = 'uknown command: {0}'.format(command)
return CommandStringResponse(response,message)