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From mtyle...@apache.org
Subject svn commit: r1096425 - /openjpa/trunk/openjpa-project/src/doc/manual/jpa_overview_em.xml
Date Mon, 25 Apr 2011 07:49:27 GMT
Author: mtylenda
Date: Mon Apr 25 07:49:27 2011
New Revision: 1096425

URL: http://svn.apache.org/viewvc?rev=1096425&view=rev
Log:
OPENJPA-1932: Documentation update: Add information about other lock-related methods to the
entity locking section.

Modified:
    openjpa/trunk/openjpa-project/src/doc/manual/jpa_overview_em.xml

Modified: openjpa/trunk/openjpa-project/src/doc/manual/jpa_overview_em.xml
URL: http://svn.apache.org/viewvc/openjpa/trunk/openjpa-project/src/doc/manual/jpa_overview_em.xml?rev=1096425&r1=1096424&r2=1096425&view=diff
==============================================================================
--- openjpa/trunk/openjpa-project/src/doc/manual/jpa_overview_em.xml (original)
+++ openjpa/trunk/openjpa-project/src/doc/manual/jpa_overview_em.xml Mon Apr 25 07:49:27 2011
@@ -84,6 +84,11 @@ Cache management.
         </listitem>
         <listitem>
             <para>
+Entity locking.
+            </para>
+        </listitem>
+        <listitem>
+            <para>
 Closing.
             </para>
         </listitem>
@@ -990,6 +995,10 @@ native query support.
                 locking
             </secondary>
         </indexterm>
+        <para>
+In the area of concurrency control, the JPA specification supports
+optimistic and pessimistic locking.
+        </para>
 <programlisting>
 public void lock(Object entity, LockModeType mode);
 </programlisting>
@@ -1064,6 +1073,20 @@ will be incremented even if the entity's
                 </para>
             </listitem>
         </itemizedlist>
+        <para>
+Entities can also be locked at the time when entity state gets loaded from the datastore.
+This is achieved by supplying a lock mode to the respective versions of
+<methodname>find</methodname> and <methodname>refresh</methodname>
methods.
+If an entity state is to be loaded by a query, a lock mode can be passed to the
+<methodname>Query.setLockMode</methodname> and <methodname>TypedQuery.setLockMode</methodname>
+methods.
+        </para>
+<programlisting>
+public LockModeType getLockMode(Object entity);
+</programlisting>
+        <para>
+Returns the lock mode currently held by the given entity.
+        </para>
         <note>
         <itemizedlist>
             <listitem>



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