SketchAggSensor.sensor
Class Sensor
- public class Sensor
- implements SensorInterface
MAX_READING
public static final int MAX_READING
- Specifies sensor range [0 ... MAX_READING]
NUM_SENSORS
static final int NUM_SENSORS
- How many sensor-devices are available ?
QUERY_FIELD
public static final int QUERY_FIELD
- Field to aggregate on
RANDOM_DIST
public static final int RANDOM_DIST
- Randomly, uniformly selected
NORMAL_DIST
public static final int NORMAL_DIST
- Selected from a normal with specified mean, variance
GEOGRAPHIC_DIST
public static final int GEOGRAPHIC_DIST
- Selected from a gradient
NINETY_TEN_DIST
public static final int NINETY_TEN_DIST
- Selected from a highly-skewed distribution where 90% of values are in the range [middle - range/2 ... middle + range/2]
MAX_EPOCHS
public static int MAX_EPOCHS
- Number of epochs after hearing intial request-to-aggrgeate that the sensor should wait before forwarding its value
x
protected int x
- The x and y coordinates of this sensor
y
protected int y
- The x and y coordinates of this sensor
top
protected Topology top
- The topology where this sensor lives
id
protected int id
- The id of this sensor
reading
protected int[] reading
- Readings for this sensor -- note that these are fixed over the lifetime of the device, generally
Sensor
public Sensor(Topology t,
int id,
int dist)
- Constructor
- Parameters:
t
- The topology used to radiate messages for this sensor
id
- The id of this sensor
dist
- The value-distribution used to generate readings for this sensor
inverseNormal
double inverseNormal(double p)
- Given a probablity p, return the value of an inverse normal function at p centered around MEAN with variance STD_DEV^2.
getId
public int getId()
- Returns:
- the id of this sensor
getX
public int getX()
- Returns:
- the current x location of this sensor
getY
public int getY()
- Returns:
- the current y location of this sensor
setX
public void setX(int x)
- Set the x location of the sensor
setY
public void setY(int y)
- Set the y locaiton of the sensor
receiveMessage
public void receiveMessage(Message m)
- Notify this sensor that it received a message
sendMessage
public void sendMessage(Message m)
- Send a message on behalf of this sensor
prepareMessage
public void prepareMessage(Message m)
- Allow the sensor to modify a message that is about to be sent
setTime
public void setTime(int time)
- Set the time
getTime
public int getTime()
- Return the last time this sensor's setTime() method was invoked
getReading
public int getReading(int sensorType)
- Return the reading of sensor-device sensorType
msgCount
public int msgCount()
- Return the number of messages this sensor has heard
sentCount
public int sentCount()
- Return the number of messages this sensor has sent
setDisabled
public void setDisabled(boolean disabled)
- Disabled sensors don't forward messages for their children
isDisabled
public boolean isDisabled()
- Returns:
- true iff this sensor is disabled
setNoParticipate
public void setNoParticipate(boolean disabled)
- Not participating sensors do forward messages, but don't include thier own aggs