com.airs.handlers

Class WifiHandler

java.lang.Object

PhoneStateListener

com.airs.handlers.WifiHandler

All Implemented Interfaces:

Handler, Runnable

public class WifiHandler
extends PhoneStateListener
implements Handler, Runnable

Class to read WiFi related sensors, specifically the WF, WI, WM, WS, WC sensor

See Also:

Handler

Field Summary

Fields

Modifier and Type	Field and Description
Semaphore	connected_semaphore semaphore for WiFi connected reading - released by GPS handler
StringBuffer	MAC_reading current MAC reading
Semaphore	mac_semaphore semaphore for MAC reading - released by GPS handler
Semaphore	nearby_semaphore semaphore for nearby thread - released by GPS handler
StringBuffer	RSSI_reading current RSSI reading
Semaphore	rssi_semaphore semaphore for RSSI reading - released by GPS handler
StringBuffer	SSID_reading current SSID reading
Semaphore	ssid_semaphore semaphore for SSID reading - released by GPS handler
StringBuffer	WLAN_reading current WLAN reading
Semaphore	wlan_semaphore semaphore for WiFi combined reading - released by GPS handler

Constructor Summary

Constructors

Constructor and Description
WifiHandler(Context nors) Constructor, allocating all necessary resources for the handler Here, it's reading the preference settings for the polltime and enabling WiFi Then, it's getting a reference to the WifiManager and finally, it's arming the semaphores

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	Acquire(String sensor, String query) Method to acquire sensor data Initialise WiFi scanning thread, if not done before Also initialise the WC sensor thread
void	destroyHandler() Method to release all handler resources Here, we release all semaphores, then shut down any acquisition threads and release the wifi lock, if held
void	Discover() Method to discover the sensor symbols support by this handler As the result of the discovery, appropriate Sensor entries will be added to the SensorRepository, if WiFi available
void	History(String sensor) Method to view historical chart of the given sensor symbol - here doing nothing
void	run() run WiFi discovery in separate thread
String	Share(String sensor) Method to share the last value of the given sensor - here doing nothing

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MAC_reading

public StringBuffer MAC_reading

current MAC reading

SSID_reading

public StringBuffer SSID_reading

current SSID reading

RSSI_reading

public StringBuffer RSSI_reading

current RSSI reading

WLAN_reading

public StringBuffer WLAN_reading

current WLAN reading

nearby_semaphore

public Semaphore nearby_semaphore

semaphore for nearby thread - released by GPS handler

mac_semaphore

public Semaphore mac_semaphore

semaphore for MAC reading - released by GPS handler

ssid_semaphore

public Semaphore ssid_semaphore

semaphore for SSID reading - released by GPS handler

rssi_semaphore

public Semaphore rssi_semaphore

semaphore for RSSI reading - released by GPS handler

wlan_semaphore

public Semaphore wlan_semaphore

semaphore for WiFi combined reading - released by GPS handler

connected_semaphore

public Semaphore connected_semaphore

semaphore for WiFi connected reading - released by GPS handler

Constructor Detail

WifiHandler

public WifiHandler(Context nors)

Constructor, allocating all necessary resources for the handler Here, it's reading the preference settings for the polltime and enabling WiFi Then, it's getting a reference to the WifiManager and finally, it's arming the semaphores

Parameters:

nors - Reference to the calling Context

Method Detail

Acquire

public byte[] Acquire(String sensor,
             String query)

Method to acquire sensor data Initialise WiFi scanning thread, if not done before Also initialise the WC sensor thread

Specified by:

Acquire in interface Handler

Parameters:

sensor - String of the sensor symbol

query - String of the query to be fulfilled - not used here

See Also:

Handler.Acquire(java.lang.String, java.lang.String)

Share

public String Share(String sensor)

Method to share the last value of the given sensor - here doing nothing

Specified by:

Share in interface Handler

Parameters:

sensor - String of the sensor symbol to be shared

Returns:

human-readable string of the last sensor value

See Also:

Handler.Share(java.lang.String)

History

public void History(String sensor)

Method to view historical chart of the given sensor symbol - here doing nothing

Specified by:

History in interface Handler

Parameters:

sensor - String of the symbol for which the history is being requested

See Also:

Handler.History(java.lang.String)

Discover

public void Discover()

Method to discover the sensor symbols support by this handler As the result of the discovery, appropriate Sensor entries will be added to the SensorRepository, if WiFi available

Specified by:

Discover in interface Handler

See Also:

Handler.Discover(), Sensor, SensorRepository

destroyHandler

public void destroyHandler()

Method to release all handler resources Here, we release all semaphores, then shut down any acquisition threads and release the wifi lock, if held

Specified by:

destroyHandler in interface Handler

See Also:

Handler.destroyHandler()

run

public void run()

run WiFi discovery in separate thread

Specified by:

run in interface Runnable

See Also:

Runnable.run()