Installation guide

New features in version 4.2.2
46 EAServer
New EJB CMP component properties
Table 6-1 lists new component properties that you can set on the Advanced tab
in the EAServer Manager Component Properties dialog box for EJB entity
beans that use Container Managed Persistence (CMP). Actual property names
are prefixed with
com.sybase.jaguar.component. These properties were added
for the 4.1.3 and 4.2.2 releases, as indicated in the table.
Table 6-1: New component properties
Property Description
com.sybase.jaguar.component.lwc
(New in 4.1.3)
Enables the EJB lightweight container.
com.sybase.jaguar.component.cmp_iso_level
(New in 4.1.3)
Specifies the effective transaction isolation level for EJB
CMP entity beans.
com.sybase.jaguar.component.defer
(New in 4.1.3)
When using one of the Sybase CMP wrapper drivers,
specifies which SQL commands may be deferred to the
end of the transaction.
com.sybase.jaguar.component.selectForUpdate
(New in 4.1.3)
Similar to the Select With Lock (selectWithLock)
Persistence setting, but requests an exclusive database
lock be obtained at select time to avoid deadlocks during
lock promotion. If this is used, also consider configuring
the database table for row-level locking.
com.sybase.jaguar.component.tlc.sort
(New in 4.1.3)
Specifies that transaction local cache entries for this
component should be sorted before
ejbStore is called.
Setting this property to true helps to avoid deadlock when
separate transactions concurrently update multiple
instances of the same component.
You cannot enable this unless the primary key class
implements the
java.lang.Comparable interface. Most
java.lang utility classes implement this interface, such as
String, Integer and so forth.
com.sybase.jaguar.component.softLock
(New in 4.2.2)
See “Soft locking” on page 48.
com.sybase.jaguar.component.softLock.timeout
(New in 4.2.2)
See “Soft locking” on page 48.
com.sybase.jaguar.component.touchColumn
(New in 4.2.2)
Used when the selectForUpdate property is true. For
databases such as Sybase Adaptive Server Enterprise that
do not support
select for update locking syntax,
EAServer locks rows by issuing a no-change update
statement. This property specifies which column to
update.