com.atlassian.greenhopper.service.lexorank

Class LexoRankBulkDeleteOperation

java.lang.Object

com.atlassian.greenhopper.service.lexorank.LexoRankBulkDeleteOperation

public class LexoRankBulkDeleteOperation
extends Object

Encapsulates a bulk rank delete operation in a command pattern.

A delete rank operation can be performed for :

- All rank rows of a list of issues

Rows are divided into batches of 10 for deletion.

In order to delete a rank rows, a lock needs to be acquired on the rows before being able to delete them. This is done to ensure no other rank operation are operating on the rows to be deleted.

The delete operation consists of following steps :

1. Find the rows to be deleted 2. Acquire a lock on these rows 3. Check if the rows have not been modified since acquiring the lock on them 4. Delete the rows 5. Release the lock

If any of the steps fail, the algorithm be try again from the beginning after waiting for a small amount of random time.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	LexoRankBulkDeleteOperation.CompleteDeleteOperation
static interface	LexoRankBulkDeleteOperation.ForIssueOrRankField

Method Summary

Modifier and Type	Method and Description
static LexoRankBulkDeleteOperation.ForIssueOrRankField	builder(LexoRankDao lexoRankDao, LexoRankStatisticsAgent lexoRankStatisticsAgent)
LexoRankOperationOutcome<Void>	execute()

Methods inherited from class java.lang.Object

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

Method Detail

builder

public static LexoRankBulkDeleteOperation.ForIssueOrRankField builder(LexoRankDao lexoRankDao,
                                                                      LexoRankStatisticsAgent lexoRankStatisticsAgent)

execute

public LexoRankOperationOutcome<Void> execute()