Package org.imixs.archive.service

Class SyncService

java.lang.Object

org.imixs.archive.service.SyncService

public class SyncService
extends Object

The SyncService pulls a Snapshot into an Apache Cassandra archive. The service uses an asynchronous mechanism based on the Imixs EventLog.

The service connects to an Imixs-Workflow instance by the Rest Client to read new snapshot data.

The service is triggered by the SyncScheduler implementing a ManagedScheduledExecutorService.

Version:

2.0

Author:

ralph.soika@imixs.com

Field Summary

Fields

Modifier and Type	Field	Description
static final String	ENV_BACKUP_MIRRORS
static final String	ENV_BACKUP_SERVICE_ENDPOINT
static final String	ENV_WORKFLOW_SERVICE_AUTHMETHOD
static final String	ENV_WORKFLOW_SERVICE_ENDPOINT
static final String	ENV_WORKFLOW_SERVICE_PASSWORD
static final String	ENV_WORKFLOW_SERVICE_USER
static final String	ENV_WORKFLOW_SYNC_DEADLOCK
static final String	ENV_WORKFLOW_SYNC_INITIALDELAY
static final String	ENV_WORKFLOW_SYNC_INTERVAL
static final String	EVENTLOG_TOPIC_ADD
static final String	EVENTLOG_TOPIC_BACKUP
static final String	EVENTLOG_TOPIC_REMOVE
static final String	ITEM_BACKUPRESTORE

Constructor Summary

Constructors

Constructor	Description
SyncService()

Method Summary

Modifier and Type	Method	Description
void	processEventLog(org.imixs.melman.EventLogClient eventLogClient, org.imixs.melman.DocumentClient documentClient)	This method is called by the ManagedScheduledExecutorService.
org.imixs.workflow.ItemCollection	pullSnapshot(org.imixs.workflow.ItemCollection eventLogEntry, org.imixs.melman.DocumentClient documentClient, org.imixs.melman.EventLogClient eventLogClient)	This method lookups the event log entries and pushes new snapshots into the archive service.
void	releaseDeadLocks(org.imixs.melman.EventLogClient eventLogClient)	Asynchronous method to release dead locks

Methods inherited from class java.lang.Object

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

Field Details

EVENTLOG_TOPIC_ADD

public static final String EVENTLOG_TOPIC_ADD

See Also:

• Constant Field Values

EVENTLOG_TOPIC_REMOVE

public static final String EVENTLOG_TOPIC_REMOVE

See Also:

• Constant Field Values

EVENTLOG_TOPIC_BACKUP

public static final String EVENTLOG_TOPIC_BACKUP

See Also:

• Constant Field Values

ITEM_BACKUPRESTORE

public static final String ITEM_BACKUPRESTORE

See Also:

• Constant Field Values

ENV_WORKFLOW_SERVICE_ENDPOINT

public static final String ENV_WORKFLOW_SERVICE_ENDPOINT

See Also:

• Constant Field Values

ENV_WORKFLOW_SERVICE_USER

public static final String ENV_WORKFLOW_SERVICE_USER

See Also:

• Constant Field Values

ENV_WORKFLOW_SERVICE_PASSWORD

public static final String ENV_WORKFLOW_SERVICE_PASSWORD

See Also:

• Constant Field Values

ENV_WORKFLOW_SERVICE_AUTHMETHOD

public static final String ENV_WORKFLOW_SERVICE_AUTHMETHOD

See Also:

• Constant Field Values

ENV_WORKFLOW_SYNC_INTERVAL

public static final String ENV_WORKFLOW_SYNC_INTERVAL

See Also:

• Constant Field Values

ENV_WORKFLOW_SYNC_INITIALDELAY

public static final String ENV_WORKFLOW_SYNC_INITIALDELAY

See Also:

• Constant Field Values

ENV_WORKFLOW_SYNC_DEADLOCK

public static final String ENV_WORKFLOW_SYNC_DEADLOCK

See Also:

• Constant Field Values

ENV_BACKUP_SERVICE_ENDPOINT

public static final String ENV_BACKUP_SERVICE_ENDPOINT

See Also:

• Constant Field Values

ENV_BACKUP_MIRRORS

public static final String ENV_BACKUP_MIRRORS

See Also:

• Constant Field Values

Constructor Details

SyncService

public SyncService()

Method Details

processEventLog

public void processEventLog(org.imixs.melman.EventLogClient eventLogClient,
 org.imixs.melman.DocumentClient documentClient)
                     throws org.imixs.melman.RestAPIException

This method is called by the ManagedScheduledExecutorService. The method lookups the event log entries and pushes new snapshots into the archive service.

Each eventLogEntry is locked to guaranty exclusive processing.

Throws:

org.imixs.melman.RestAPIException

releaseDeadLocks

public void releaseDeadLocks(org.imixs.melman.EventLogClient eventLogClient)
                      throws org.imixs.melman.RestAPIException

Asynchronous method to release dead locks

Parameters:

eventLogClient -

deadLockInterval -

topic -

Throws:

org.imixs.melman.RestAPIException

pullSnapshot

public org.imixs.workflow.ItemCollection pullSnapshot(org.imixs.workflow.ItemCollection eventLogEntry,
 org.imixs.melman.DocumentClient documentClient,
 org.imixs.melman.EventLogClient eventLogClient)
                                               throws ArchiveException

This method lookups the event log entries and pushes new snapshots into the archive service.

The method returns a AsyncResult to indicate the completion of the push. A client can use this information for further control.

The method returns the snapshot ItemCollection

Throws:

ArchiveException

org.imixs.melman.RestAPIException