org.xmlactions.db.sql.select

Class VersionNumberConcurrency

java.lang.Object

org.xmlactions.db.sql.select.VersionNumberConcurrency

public class VersionNumberConcurrency
extends java.lang.Object

This class manages concurrency clashes when two or more edits are performed on the same record. If 2 users read the record, 1 makes a change and submits then the 2nd user cannot submit any changes until they update their record to reflect the changes made by the first user.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	VERSION_NUM_KEY_NAME

Constructor Summary

Constructors

Constructor and Description
VersionNumberConcurrency()

Method Summary

Modifier and Type	Method and Description
static java.lang.String	buildVersionNumberKey(java.lang.String key) This static method is used to build a unique identifier for the version number key in the session persistence execContext.
static java.lang.String	buildVersionNumberKeyWithPkValue(java.lang.String key, java.lang.String pkValue) This static method is used to build a unique identifier for the version number key in the session persistence execContext.
static PropertyKeyValue	getVersionNumber(IExecContext execContext, ISqlTable sqlTable)

Methods inherited from class java.lang.Object

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

Field Detail

VERSION_NUM_KEY_NAME

public static final java.lang.String VERSION_NUM_KEY_NAME

See Also:

Constant Field Values

Constructor Detail

VersionNumberConcurrency

public VersionNumberConcurrency()

Method Detail

getVersionNumber

public static PropertyKeyValue getVersionNumber(IExecContext execContext,
                                                ISqlTable sqlTable)

buildVersionNumberKey

public static java.lang.String buildVersionNumberKey(java.lang.String key)

This static method is used to build a unique identifier for the version number key in the session persistence execContext.

Parameters:

key - the table name/alias + . + field name/alias.

Returns:

"ver_num." + key (+ "." + pkValue)

buildVersionNumberKeyWithPkValue

public static java.lang.String buildVersionNumberKeyWithPkValue(java.lang.String key,
                                                                java.lang.String pkValue)

This static method is used to build a unique identifier for the version number key in the session persistence execContext.

Parameters:

key - the table name/alias + . + field name/alias.

pkValue - a reference to a PK value for this versionNumber.

Returns:

"ver_num." + key + "." + pkValue