org.eclipse.paho.client.mqttv3.internal

Class MqttPersistentData

java.lang.Object

org.eclipse.paho.client.mqttv3.internal.MqttPersistentData

All Implemented Interfaces:

MqttPersistable

public class MqttPersistentData
extends Object
implements MqttPersistable

Constructor Summary

Constructors

Constructor and Description
MqttPersistentData(String key, byte[] header, int hOffset, int hLength, byte[] payload, int pOffset, int pLength) Construct a data object to pass across the MQTT client persistence interface.

Method Summary

Modifier and Type	Method and Description
byte[]	getHeaderBytes() Returns the header bytes in an array.
int	getHeaderLength() Returns the length of the header.
int	getHeaderOffset() Returns the offset of the header within the byte array returned by MqttPersistable.getHeaderBytes().
String	getKey()
byte[]	getPayloadBytes() Returns the payload bytes in an array.
int	getPayloadLength() Returns the length of the payload.
int	getPayloadOffset() Returns the offset of the payload within the byte array returned by MqttPersistable.getPayloadBytes().

Methods inherited from class java.lang.Object

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

Constructor Detail

MqttPersistentData

public MqttPersistentData(String key,
                          byte[] header,
                          int hOffset,
                          int hLength,
                          byte[] payload,
                          int pOffset,
                          int pLength)

Construct a data object to pass across the MQTT client persistence interface. When this Object is passed to the persistence implementation the key is used by the client to identify the persisted data to which further update or deletion requests are targeted.
When this Object is created for returning to the client when it is recovering its state from persistence the key is not required to be set. The client can determine the key from the data.

Parameters:

key - The key which identifies this data

header - The message header

hOffset - The start offset of the header bytes in header.

hLength - The length of the header in the header bytes array.

payload - The message payload

pOffset - The start offset of the payload bytes in payload.

pLength - The length of the payload in the payload bytes array when persisting the message.

Method Detail

getKey

public String getKey()

getHeaderBytes

public byte[] getHeaderBytes()

Description copied from interface: MqttPersistable

Returns the header bytes in an array. The bytes start at MqttPersistable.getHeaderOffset() and continue for MqttPersistable.getHeaderLength().

Specified by:

getHeaderBytes in interface MqttPersistable

Returns:

the header bytes.

getHeaderLength

public int getHeaderLength()

Description copied from interface: MqttPersistable

Returns the length of the header.

Specified by:

getHeaderLength in interface MqttPersistable

Returns:

the header length

getHeaderOffset

public int getHeaderOffset()

Description copied from interface: MqttPersistable

Returns the offset of the header within the byte array returned by MqttPersistable.getHeaderBytes().

Specified by:

getHeaderOffset in interface MqttPersistable

Returns:

the header offset.

getPayloadBytes

public byte[] getPayloadBytes()

Description copied from interface: MqttPersistable

Returns the payload bytes in an array. The bytes start at MqttPersistable.getPayloadOffset() and continue for MqttPersistable.getPayloadLength().

Specified by:

getPayloadBytes in interface MqttPersistable

Returns:

the payload bytes.

getPayloadLength

public int getPayloadLength()

Description copied from interface: MqttPersistable

Returns the length of the payload.

Specified by:

getPayloadLength in interface MqttPersistable

Returns:

the payload length.

getPayloadOffset

public int getPayloadOffset()

Description copied from interface: MqttPersistable

Returns the offset of the payload within the byte array returned by MqttPersistable.getPayloadBytes().

Specified by:

getPayloadOffset in interface MqttPersistable

Returns:

the payload offset.