org.jscsi.initiator.connection.state

Class ReadRequestState

java.lang.Object

org.jscsi.initiator.connection.state.ReadRequestState

All Implemented Interfaces:

IState

public final class ReadRequestState
extends Object

ReadRequestState

This state handles a Read Request with some unsolicited data.

Author:

Volker Wildi

Field Summary

Fields

Modifier and Type	Field and Description
protected Connection	connection The context connection used by all message kinds.
protected static org.slf4j.Logger	LOGGER The Logger interface.
protected ProtocolDataUnitFactory	protocolDataUnitFactory Factory to create the ProtocolDataUnit instances.
protected boolean	stateFollowing boolean to mark following states.

Constructor Summary

Constructors

Constructor and Description
ReadRequestState(Connection initConnection, ByteBuffer initBuffer, SCSICommandParser.TaskAttributes initTaskAttributes, int initExpectedDataTransferLength, int initLogicalBlockAddress, short initTransferLength) Constructor to create a ReadRequestState instance, which creates a request to the iSCSI Target.

Method Summary

Modifier and Type	Method and Description
void	execute() This method is always invoked, when a request message must be send or response message must be received and then parsed.
Exception	isCorrect(ProtocolDataUnit protocolDataUnit) This method checks the correctness of the given ProtocolDataUnit instance within the current state of a connection.
boolean	nextStateFollowing() This method shows if another state is following this one.

Methods inherited from class java.lang.Object

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

Field Detail

LOGGER

protected static final org.slf4j.Logger LOGGER

The Logger interface.

connection

protected final Connection connection

The context connection used by all message kinds.

protocolDataUnitFactory

protected final ProtocolDataUnitFactory protocolDataUnitFactory

Factory to create the ProtocolDataUnit instances.

stateFollowing

protected boolean stateFollowing

boolean to mark following states.

Constructor Detail

ReadRequestState

public ReadRequestState(Connection initConnection,
                        ByteBuffer initBuffer,
                        SCSICommandParser.TaskAttributes initTaskAttributes,
                        int initExpectedDataTransferLength,
                        int initLogicalBlockAddress,
                        short initTransferLength)

Constructor to create a ReadRequestState instance, which creates a request to the iSCSI Target.

Parameters:

initConnection - This is the connection, which is used for the network transmission.

initBuffer - This buffer should be read.

initTaskAttributes - The task attributes of this task.

initExpectedDataTransferLength - The expected length in bytes, which should be transfered.

initLogicalBlockAddress - The logical block address of the first block to read.

initTransferLength - The number of blocks to read.

Method Detail

execute

public final void execute()
                   throws InternetSCSIException

This method is always invoked, when a request message must be send or response message must be received and then parsed.

Throws:

InternetSCSIException - if any violation of the iSCSI Standard (RfC3720) has emerged.

isCorrect

public Exception isCorrect(ProtocolDataUnit protocolDataUnit)

This method checks the correctness of the given ProtocolDataUnit instance within the current state of a connection.

Specified by:

isCorrect in interface IState

Parameters:

protocolDataUnit - The ProtocolDataUnit instance to check.

Returns:

Exception if any problem occured with the PDU, null otherwise.

nextStateFollowing

public boolean nextStateFollowing()

This method shows if another state is following this one.

Specified by:

nextStateFollowing in interface IState

Returns:

true, if another state must follow this state. Else an final state is reached.