de.htw.berlin.polysun4diac.forte.comm

Class UDPpublisherCommLayer

java.lang.Object

de.htw.berlin.polysun4diac.forte.comm.AbstractCommunicationLayer

de.htw.berlin.polysun4diac.forte.comm.UDPcommunicationLayer

de.htw.berlin.polysun4diac.forte.comm.UDPpublisherCommLayer

All Implemented Interfaces:

ICommunicationLayer, java.io.Serializable

public class UDPpublisherCommLayer
extends UDPcommunicationLayer

Bottom OSI layer for handling UDP/IP communication of a publisher. Intended for communication with FORTE SUBSCRIBER function blocks.

Author:

Marc Jakobi

HTW Berlin

July 2017

See Also:

FORTE communication architecture, Serialized Form

Constructor Summary

Constructors

Constructor and Description
UDPpublisherCommLayer()

Method Summary

Modifier and Type	Method and Description
boolean	getConnectionState()
boolean	openConnection(CommLayerParams params) Opens the connection and sets up the communication stack.
byte	readByte() Reads a byte from the communication layer below or the connected device if this layer is the bottom layer.
double	readDouble() Reads 8 bytes from the communication layer below or the connected device if this layer is the bottom layer.
float	readFloat() Reads 4 bytes from the communication layer below or the connected device if this layer is the bottom layer.
long	readLong() Reads 4 bytes from the communication layer below or the connected device if this layer is the bottom layer.
void	recvData() Performs the necessary actions for receiving data.
void	sendData(byte[] data, int off, int len) Performs the necessary actions for sending data.

Methods inherited from class de.htw.berlin.polysun4diac.forte.comm.UDPcommunicationLayer

closeConnection

Methods inherited from class de.htw.berlin.polysun4diac.forte.comm.AbstractCommunicationLayer

getAbove, getBelow, getRawBytes, sendData, setAbove, setBelow

Methods inherited from class java.lang.Object

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

Constructor Detail

UDPpublisherCommLayer

public UDPpublisherCommLayer()

Method Detail

openConnection

public boolean openConnection(CommLayerParams params)
                       throws java.io.IOException

Description copied from interface: ICommunicationLayer

Opens the connection and sets up the communication stack. If necessary, additional layers below this layer are created.

Specified by:

openConnection in interface ICommunicationLayer

Overrides:

openConnection in class AbstractCommunicationLayer

Parameters:

params - CommLayerParams object holding the connection info

Returns:

true if the connection was opened successfully, false otherwise

Throws:

java.io.IOException

sendData

public void sendData(byte[] data,
                     int off,
                     int len)
              throws java.io.IOException

Description copied from interface: ICommunicationLayer

Performs the necessary actions for sending data.

Specified by:

sendData in interface ICommunicationLayer

Overrides:

sendData in class AbstractCommunicationLayer

Parameters:

data - Byte array containing the data

len - Length of the data to be sent

Throws:

java.io.IOException

recvData

public void recvData()
              throws java.io.IOException

Description copied from interface: ICommunicationLayer

Performs the necessary actions for receiving data.

Specified by:

recvData in interface ICommunicationLayer

Overrides:

recvData in class AbstractCommunicationLayer

Throws:

java.io.IOException

getConnectionState

public boolean getConnectionState()

Specified by:

getConnectionState in interface ICommunicationLayer

Overrides:

getConnectionState in class UDPcommunicationLayer

Returns:

true if the layer is connected, false otherwise.

readByte

public byte readByte()
              throws java.io.IOException

Description copied from interface: ICommunicationLayer

Reads a byte from the communication layer below or the connected device if this layer is the bottom layer.

Specified by:

readByte in interface ICommunicationLayer

Overrides:

readByte in class AbstractCommunicationLayer

Throws:

java.io.IOException

readLong

public long readLong()
              throws java.io.IOException

Description copied from interface: ICommunicationLayer

Reads 4 bytes from the communication layer below or the connected device if this layer is the bottom layer.

Specified by:

readLong in interface ICommunicationLayer

Overrides:

readLong in class AbstractCommunicationLayer

Returns:

the long value represented by the 4 bytes.

Throws:

java.io.IOException

readDouble

public double readDouble()
                  throws java.io.IOException

Description copied from interface: ICommunicationLayer

Reads 8 bytes from the communication layer below or the connected device if this layer is the bottom layer.

Specified by:

readDouble in interface ICommunicationLayer

Overrides:

readDouble in class AbstractCommunicationLayer

Returns:

the double value represented by the 8 bytes.

Throws:

java.io.IOException

readFloat

public float readFloat()
                throws java.io.IOException

Description copied from interface: ICommunicationLayer

Reads 4 bytes from the communication layer below or the connected device if this layer is the bottom layer.

Specified by:

readFloat in interface ICommunicationLayer

Overrides:

readFloat in class AbstractCommunicationLayer

Returns:

the float value represented by the 4 bytes.

Throws:

java.io.IOException