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build.user_speed.UserSpeed.get_speed()   A

↳ Parent: build.user_speed

Complexity

Conditions 5

Size

Total Lines 19
Code Lines 11

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 11
CRAP Score 5

Importance

Changes 0
Metric Value
cc 5
eloc 11
nop 3
dl 0
loc 19
ccs 11
cts 11
cp 1
crap 5
rs 9.3333
c 0
b 0
f 0
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"""Manage link speeds when OF spec is not enough."""
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import json
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from os.path import dirname
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from pathlib import Path
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class UserSpeed:

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    """User-defined interface speeds.

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    In case there is no matching speed in OF spec or the speed is not correctly

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    detected.

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    """

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    _FILE = Path(dirname(__file__)) / 'user_speed.json'

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    def __init__(self):

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        """Load user-created file."""

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        if self._FILE.exists():

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            with self._FILE.open() as user_file:

            


            
                                                                                                            
                            
            
                                    
            
            

                
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                # print('UserSpeed', user_file.read())

            


            
                                                                                                            
                            
            
                                    
            
            

                
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                self._speed = json.load(user_file)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        else:

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            self._speed = {}

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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    def get_speed(self, dpid, port=None):

            


            
                                                        
            
                                    
            
            

                
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        """Return speed in bits/sec or None if not defined by the user.

            


            
                                                        
            
                                    
            
            

                
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        Args:

            


            
                                                        
            
                                    
            
            

                
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            dpid (str): Switch dpid.

            


            
                                                        
            
                                    
            
            

                
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            port (int or str): Port number.

            


            
                                                        
            
                                    
            
            

                
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        """

            


            
                                                        
            
                                    
            
            

                
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        if not isinstance(port, str):

            


            
                                                        
            
                                    
            
            

                
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            port = str(port)

            


            
                                                        
            
                                    
            
            

                
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        speed = None

            


            
                                                        
            
                                    
            
            

                
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        switch = self._speed.get(dpid)

            


            
                                                        
            
                                    
            
            

                
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        if switch is None:

            


            
                                                        
            
                                    
            
            

                
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            speed = self._speed.get('default')

            


            
                                                        
            
                                    
            
            

                
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        else:

            


            
                                                        
            
                                    
            
            

                
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            if port is None or port not in switch:

            


            
                                                        
            
                                    
            
            

                
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                speed = switch.get('default')

            


            
                                                        
            
                                    
            
            

                
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            else:

            


            
                                                        
            
                                    
            
            

                
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                speed = switch.get(port)

            


            
                                                        
            
                                    
            
            

                
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        return speed

            


            
                                                        
            
                                    
            
            

                
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