org.imixs.archive.service.resync

Class RestoreService

java.lang.Object

org.imixs.archive.service.resync.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 eariest 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 stoped after all snapshots in the restore timerange (restore.from - restore.to) are restored.

Version:

1.0

Author:

rsoika

Field Summary

Fields

Modifier and Type	Field and 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 and Description
RestoreService()

Method Summary

Modifier and Type	Method and Description
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 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.

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

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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

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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

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