org.snmp4j.agent.request

Class AbstractRequest<U extends SubRequest,S,R>

java.lang.Object

org.snmp4j.agent.request.AbstractRequest<U,S,R>

All Implemented Interfaces:

Request<S,R>

Direct Known Subclasses:

SnmpRequest

public abstract class AbstractRequest<U extends SubRequest,S,R>
extends Object
implements Request<S,R>

The AbstractRequest implements common elements of SNMP and AgentX requests and might be also used for other sub-agent request types.

Version:

1.0

Author:

Frank Fock

Field Summary

Fields

Modifier and Type	Field and Description
protected int	errorStatus
protected int	phase
protected int	repeaterRowSize
protected int	repeaterStartIndex
protected int	reprocessCounter
protected R	response
protected S	source
protected List<U>	subrequests
protected int	transactionID

Fields inherited from interface org.snmp4j.agent.request.Request

PHASE_1PC, PHASE_2PC_CLEANUP, PHASE_2PC_COMMIT, PHASE_2PC_PREPARE, PHASE_2PC_UNDO, PHASE_INIT

Constructor Summary

Constructors

Constructor and Description
AbstractRequest(S source)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object obj)
SubRequest	find(org.snmp4j.smi.OID prefix) Finds the first sub-request whose OID starts with the supplied one.
SubRequest	get(int index) Gets the sub-request at the specified index.
int	getErrorIndex()
int	getErrorStatus()
protected abstract int	getMaxPhase()
int	getPhase() Gets the phase identifier of the current Two-Phase-Commit (2PC) phase of this request.
int	getReprocessCounter() Returns the value of the reprocessing counter associated with this request.
R	getResponse() Returns the response object for this request.
S	getSource() Returns the initiating event object for the request.
int	getTransactionID()
int	hashCode()
void	incReprocessCounter() Increments the reprocess counter by one.
protected void	initSubRequests()
abstract boolean	isBulkRequest()
boolean	isComplete() Checks whether the response for this request is complete.
int	nextPhase() Initializes next phase and returns its identifier.
protected void	resetCompletionStatus()
void	resetProcessedStatus() Set the processed status of each (incomplete) sub-request to false.
void	setErrorStatus(int errorStatus)
void	setPhase(int phase) Sets the request phase.
protected abstract void	setupSubRequests()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.snmp4j.agent.request.Request

getContext, getMessageProcessingModel, getProcessingUserObject, getSecurityLevel, getSecurityModel, getSecurityName, getViewName, getViewType, isPhaseComplete, iterator, setProcessingUserObject, setViewName, size

Field Detail

subrequests

protected List<U extends SubRequest> subrequests

source

protected S source

response

protected R response

phase

protected int phase

errorStatus

protected int errorStatus

repeaterStartIndex

protected int repeaterStartIndex

repeaterRowSize

protected int repeaterRowSize

reprocessCounter

protected int reprocessCounter

transactionID

protected int transactionID

Constructor Detail

AbstractRequest

public AbstractRequest(S source)

Method Detail

getSource

public S getSource()

Description copied from interface: Request

Returns the initiating event object for the request.

Specified by:

getSource in interface Request<S,R>

Returns:

an Object instance on whose behalf this request has been initiated.

getResponse

public R getResponse()

Description copied from interface: Request

Returns the response object for this request.

Specified by:

getResponse in interface Request<S,R>

Returns:

an object containing the response for this request.

isBulkRequest

public abstract boolean isBulkRequest()

find

public SubRequest find(org.snmp4j.smi.OID prefix)

Description copied from interface: Request

Finds the first sub-request whose OID starts with the supplied one.

Specified by:

find in interface Request<S,R>

Parameters:

prefix - the OID prefix of the sub-request OID.

Returns:

the first SubRequest instance of this request whose OID starts with prefix. If no such sub-request exits null is returned.

initSubRequests

protected void initSubRequests()

setupSubRequests

protected abstract void setupSubRequests()

getMaxPhase

protected abstract int getMaxPhase()

nextPhase

public int nextPhase()

Description copied from interface: Request

Initializes next phase and returns its identifier.

Specified by:

nextPhase in interface Request<S,R>

Returns:

a phase identifier.

isComplete

public boolean isComplete()

Description copied from interface: Request

Checks whether the response for this request is complete.

Specified by:

isComplete in interface Request<S,R>

Returns:

true if all required data has been collected to create a response for this request, false otherwise.

get

public SubRequest get(int index)

Description copied from interface: Request

Gets the sub-request at the specified index.

Specified by:

get in interface Request<S,R>

Parameters:

index - an index >= 0 and < size()

Returns:

a SnmpSubRequest instance.

getPhase

public int getPhase()

Description copied from interface: Request

Gets the phase identifier of the current Two-Phase-Commit (2PC) phase of this request.

Specified by:

getPhase in interface Request<S,R>

Returns:

a 2PC identifier

getErrorIndex

public int getErrorIndex()

Specified by:

getErrorIndex in interface Request<S,R>

getErrorStatus

public int getErrorStatus()

Specified by:

getErrorStatus in interface Request<S,R>

getTransactionID

public int getTransactionID()

Specified by:

getTransactionID in interface Request<S,R>

setPhase

public void setPhase(int phase)
              throws NoSuchElementException

Description copied from interface: Request

Sets the request phase.

Specified by:

setPhase in interface Request<S,R>

Parameters:

phase - a phase identifier.

Throws:

NoSuchElementException - if there is no such phase for this type of request.

resetCompletionStatus

protected void resetCompletionStatus()

resetProcessedStatus

public void resetProcessedStatus()

Description copied from interface: Request

Set the processed status of each (incomplete) sub-request to false.

Specified by:

resetProcessedStatus in interface Request<S,R>

setErrorStatus

public void setErrorStatus(int errorStatus)

Specified by:

setErrorStatus in interface Request<S,R>

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getReprocessCounter

public int getReprocessCounter()

Description copied from interface: Request

Returns the value of the reprocessing counter associated with this request. The reprocessing counter can be used to detect and handle endless-loop errors caused by instrumentation code not setting the completion status of a sub-request correctly.

Specified by:

getReprocessCounter in interface Request<S,R>

Returns:

0 after the initial (and normally last) processing iteration and n after the n-th reprocessing iteration.

See Also:

Request.incReprocessCounter()

incReprocessCounter

public void incReprocessCounter()

Description copied from interface: Request

Increments the reprocess counter by one.

Specified by:

incReprocessCounter in interface Request<S,R>

See Also:

Request.getReprocessCounter()

toString

public String toString()

Overrides:

toString in class Object