Package org.imixs.archive.service.restore

Class RestoreService

java.lang.Object

org.imixs.archive.service.restore.RestoreService

public class RestoreService
extends Object

The RestoreService restores the workflow data stored in the cassandra cluster into a Imixs-Workflow instance. The service class runs in the background as a TimerService.

The scheduler configuration is stored in the Metadata object of the cassandra keyspace. The following attributes are defining the restore procedure:

restore.from: the earliest snapshot syncpoint to be restored (can be 0)

restore.to: the latest snapshot syncpoint to be restored

restore.point: the current snapshot syncpoint. This date is used to select snapshots by date in a cassandra partion.

restore.count: count of restored snapshots

restore.size: bytes of restored snapshot data

The timer is stopped after all snapshots in the restore time range (restore.from - restore.to) are restored.

Version:

1.0

Author:

rsoika

Field Summary

Fields

Modifier and Type	Field	Description
static String	ITEM_RESTORE_FROM
static String	ITEM_RESTORE_OPTIONS
static String	ITEM_RESTORE_SYNCCOUNT
static String	ITEM_RESTORE_SYNCERRORS
static String	ITEM_RESTORE_SYNCPOINT
static String	ITEM_RESTORE_SYNCSIZE
static String	ITEM_RESTORE_TO
static String	MESSAGE_TOPIC
static String	TIMER_ID_RESTORESERVICE
static long	TIMER_INTERVAL_DURATION

Constructor Summary

Constructors

Constructor	Description
RestoreService()

Method Summary

Modifier and Type	Method	Description
void	cancel()	Stops the current restore process
javax.ejb.Timer	findTimer()	This method returns a timer for a corresponding id if such a timer object exists.
List<org.imixs.workflow.ItemCollection>	getOptions(org.imixs.workflow.ItemCollection metaData)	returns the optional embedded Map List of the options, stored in the metadata object.
void	setOptions(List<org.imixs.workflow.ItemCollection> options, org.imixs.workflow.ItemCollection metaData)	Convert a List of ItemCollections back into a List of Map elements
void	start(long restoreFrom, long restoreTo, List<Map> options)	Starts a new restore process with a EJB TimerService

Methods inherited from class java.lang.Object

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

Field Detail

TIMER_ID_RESTORESERVICE

public static final String TIMER_ID_RESTORESERVICE

See Also:

Constant Field Values

TIMER_INTERVAL_DURATION

public static final long TIMER_INTERVAL_DURATION

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Constant Field Values

ITEM_RESTORE_FROM

public static final String ITEM_RESTORE_FROM

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Constant Field Values

ITEM_RESTORE_TO

public static final String ITEM_RESTORE_TO

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Constant Field Values

ITEM_RESTORE_SYNCPOINT

public static final String ITEM_RESTORE_SYNCPOINT

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Constant Field Values

ITEM_RESTORE_SYNCCOUNT

public static final String ITEM_RESTORE_SYNCCOUNT

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Constant Field Values

ITEM_RESTORE_SYNCERRORS

public static final String ITEM_RESTORE_SYNCERRORS

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Constant Field Values

ITEM_RESTORE_SYNCSIZE

public static final String ITEM_RESTORE_SYNCSIZE

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Constant Field Values

ITEM_RESTORE_OPTIONS

public static final String ITEM_RESTORE_OPTIONS

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Constant Field Values

MESSAGE_TOPIC

public static final String MESSAGE_TOPIC

See Also:

Constant Field Values

Constructor Detail

RestoreService

public RestoreService()

Method Detail

start

public void start(long restoreFrom,
                  long restoreTo,
                  List<Map> options)
           throws ArchiveException

Starts a new restore process with a EJB TimerService

The Timer will be started imediatly with a intervall duration defined by the constante TIMER_INTERVAL_DURATION

The meta data for the restore process is stored in the metadata object.

The restore process selects snapshot data by date (SNAPSHOTS_BY_MODIFIED). The current date is stored in the meta data. The meta data is updated after each iteration.

Parameters:

datFrom - - syncpoint from

datTo - - syncpoint to

options - - optional list of item map.

Throws:

ArchiveException

cancel

public void cancel()
            throws ArchiveException

Stops the current restore process

Throws:

ArchiveException

findTimer

public javax.ejb.Timer findTimer()

This method returns a timer for a corresponding id if such a timer object exists.

Parameters:

id -

Returns:

Timer

Throws:

Exception

getOptions

public List<org.imixs.workflow.ItemCollection> getOptions(org.imixs.workflow.ItemCollection metaData)

returns the optional embedded Map List of the options, stored in the metadata object.

setOptions

public void setOptions(List<org.imixs.workflow.ItemCollection> options,
                       org.imixs.workflow.ItemCollection metaData)

Convert a List of ItemCollections back into a List of Map elements

Parameters:

options - - list of options

metaData - - metaData object