| 摘要 |
<p>Separate instances of a data item can be allocated for each transaction in a system. Each instance can be held by an entity bean (104 and 106) capable of updating by either reading a copy of the data item from the database (102) or by reading a copy from another entity bean. When the data item in the database is changed, the system can notify each entity bean that it should read an updated copy od the data item before the next transaction (108 and 110).</p> |
