com.digi.xbee.api.models

Class XBeePacketsQueue

java.lang.Object

com.digi.xbee.api.models.XBeePacketsQueue

public class XBeePacketsQueue
extends Object

This class represents a queue of XBee packets used for sequential packets reading within the XBee Java API.

The class provides some methods to get specific packet types from different source nodes.

See Also:

XBeePacket

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_MAX_LENGTH Default maximum number of packets to store in the queue (value: 50).

Constructor Summary

Constructors

Constructor and Description
XBeePacketsQueue() Class constructor.
XBeePacketsQueue(int maxLength) Class constructor.

Method Summary

Modifier and Type	Method and Description
void	addPacket(XBeePacket xbeePacket) Adds the provided packet to the list of packets.
void	clearQueue() Clears the list of packets.
int	getCurrentSize() Returns the current size of the XBee packets queue.
XBeePacket	getFirstDataPacket(int timeout) Returns the first data packet from the queue waiting up to the specified timeout if necessary for an XBee data packet to become available.
XBeePacket	getFirstDataPacketFrom(RemoteXBeeDevice remoteXBeeDevice, int timeout) Returns the first data packet from the queue whose 64-bit source address matches the address of the provided remote XBee device.
XBeePacket	getFirstPacket(int timeout) Returns the first packet from the queue waiting up to the specified timeout if necessary for an XBee packet to become available.
XBeePacket	getFirstPacketFrom(RemoteXBeeDevice remoteXBeeDevice, int timeout) Returns the first packet from the queue whose 64-bit source address matches the address of the provided remote XBee device.
int	getMaxSize() Returns the maximum size of the XBee packets queue.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_MAX_LENGTH

public static final int DEFAULT_MAX_LENGTH

Default maximum number of packets to store in the queue (value: 50).

See Also:

Constant Field Values

Constructor Detail

XBeePacketsQueue

public XBeePacketsQueue()

Class constructor. Instantiates a new object of type XBeePacketsQueue.

XBeePacketsQueue

public XBeePacketsQueue(int maxLength)

Class constructor. Instantiates a new object of type XBeePacketsQueue with the given maximum length.

Parameters:

maxLength - Maximum length of the queue.

Throws:

IllegalArgumentException - if maxLength < 1.

Method Detail

addPacket

public void addPacket(XBeePacket xbeePacket)

Adds the provided packet to the list of packets. If the queue is full the first packet will be discarded to add the given one.

Parameters:

xbeePacket - The XBee packet to be added to the list.

See Also:

XBeePacket

clearQueue

public void clearQueue()

Clears the list of packets.

getCurrentSize

public int getCurrentSize()

Returns the current size of the XBee packets queue.

Returns:

The current size of the XBee packets queue.

getFirstDataPacket

public XBeePacket getFirstDataPacket(int timeout)

Returns the first data packet from the queue waiting up to the specified timeout if necessary for an XBee data packet to become available. null if the queue is empty or there is not any data packet inside.

Parameters:

timeout - The time in milliseconds to wait for an XBee data packet to become available. 0 to return immediately.

Returns:

The first data packet from the queue, null if it is empty or no data packets are contained in the queue.

See Also:

XBeePacket

getFirstDataPacketFrom

public XBeePacket getFirstDataPacketFrom(RemoteXBeeDevice remoteXBeeDevice,
                                         int timeout)

Returns the first data packet from the queue whose 64-bit source address matches the address of the provided remote XBee device.

The methods waits up to the specified timeout if necessary for an XBee data packet to become available. null if the queue is empty or there is not any XBee data packet sent by the provided remote XBee device.

Parameters:

remoteXBeeDevice - The XBee device containing the 64-bit address to look for in the list of packets.

timeout - The time in milliseconds to wait for an XBee data packet from the specified remote XBee device to become available. 0 to return immediately.

Returns:

The first XBee data packet whose its 64-bit address matches the address of the provided remote XBee device. null if no data packets from the specified XBee device are found in the queue.

See Also:

RemoteXBeeDevice, XBeePacket

getFirstPacket

public XBeePacket getFirstPacket(int timeout)

Returns the first packet from the queue waiting up to the specified timeout if necessary for an XBee packet to become available. null if the queue is empty.

Parameters:

timeout - The time in milliseconds to wait for an XBee packet to become available. 0 to return immediately.

Returns:

The first packet from the queue, null if it is empty.

See Also:

XBeePacket

getFirstPacketFrom

public XBeePacket getFirstPacketFrom(RemoteXBeeDevice remoteXBeeDevice,
                                     int timeout)

Returns the first packet from the queue whose 64-bit source address matches the address of the provided remote XBee device.

The methods waits up to the specified timeout if necessary for an XBee packet to become available. Null if the queue is empty or there is not any XBee packet sent by the provided remote XBee device.

Parameters:

remoteXBeeDevice - The remote XBee device containing the 64-bit address to look for in the list of packets.

timeout - The time in milliseconds to wait for an XBee packet from the specified remote XBee device to become available. 0 to return immediately.

Returns:

The first XBee packet whose 64-bit address matches the address of the provided remote XBee device. null if no packets from the specified XBee device are found in the queue.

See Also:

RemoteXBeeDevice, XBeePacket

getMaxSize

public int getMaxSize()

Returns the maximum size of the XBee packets queue.

Returns:

The maximum size of the XBee packets queue.