User: luke_t
Date: 01/12/04 18:07:57
Modified: src/xdocs faq.xml
Log:
added link to juha's book and some CMP stuff with ref to Dain's CMP 2.0 docs.
Revision Changes Path
3.2 +20 -18 manual/src/xdocs/faq.xml
Index: faq.xml
===================================================================
RCS file: /cvsroot/jboss/manual/src/xdocs/faq.xml,v
retrieving revision 3.1
retrieving revision 3.2
diff -u -r3.1 -r3.2
--- faq.xml 2001/11/30 02:50:06 3.1
+++ faq.xml 2001/12/05 02:07:56 3.2
@@ -6,11 +6,11 @@
<articleinfo>
<title>JBoss FAQ</title>
- <releaseinfo>$Revision: 3.1 $, $Date: 2001/11/30 02:50:06 $</releaseinfo>
+ <releaseinfo>$Revision: 3.2 $, $Date: 2001/12/05 02:07:56 $</releaseinfo>
<!--revhistory>
<revision>
- <revnumber>$Revision: 3.1 $</revnumber>
- <date>$Date: 2001/11/30 02:50:06 $</date>
+ <revnumber>$Revision: 3.2 $</revnumber>
+ <date>$Date: 2001/12/05 02:07:56 $</date>
</revision>
</revhistory>
-->
@@ -24,7 +24,7 @@
</abstract>
-->
- <qandaset defaultlabel="number">
+ <qandaset>
<qandadiv id="faq.intro">
<title>Introduction</title>
@@ -33,7 +33,7 @@
<qandaentry id="faq.intro.version">
<question><para>What is the version of this FAQ and when was it last
updated?</para></question>
<answer>
- <para>This is $Revision: 3.1 $ of the FAQ. The last update was made
on $Date: 2001/11/30 02:50:06 $.</para>
+ <para>This is $Revision: 3.2 $ of the FAQ. The last update was made
on $Date: 2001/12/05 02:07:56 $.</para>
</answer>
</qandaentry>
@@ -153,12 +153,14 @@
<answer>
<para>With respect to Enterprise JavaBeans (EJBs), persistence is a
term that describes the process whereby the the state of an active (stateful?) EJB is
stored (usually to a database) in such a way that the EJB can be reactivated later. It
is serialization for EJBs if you like.</para>
- <para>There are two flavours of persistence in EJB - Bean-Managed
Persistence (BMP) and Container-Managed Persistence (CMP). The main difference between
the two flavours is who is responsible for <emphasis>actually</emphasis> persisting
the EJB. In BMP the bean developer is responsible for writing the code that persists
the beans state (maybe using JDBC?) while in CMP, the container is reponsible. In CMP
a bean developer might not even <emphasis>know</emphasis> what object-relational
database persistence is let alone how it works?. Pretty neat.</para>
+ <para>There are two flavours of persistence in EJB - Bean-Managed
Persistence (BMP) and Container-Managed Persistence (CMP). The main difference between
the two flavours is who is responsible for <emphasis>actually</emphasis> persisting
the EJB. In BMP the bean developer is responsible for writing the code that persists
the bean's state (maybe using JDBC?) while in CMP, the container is reponsible.</para>
<para>A relevant excerpt from the <ulink
url="http://java.sun.com/products/ejb/docs.html";>EJB 1.1. specification</ulink>
itself, on page 100:
<blockquote><para>The entity bean component protocol allows
the entity Bean Provider either to implement the entity bean's persistence directly in
the entity bean class or in one or more helper classes provided with the entity bean
class (bean-managed persistence), or to delegate the entity bean's persistence to the
Container Provider tools used at deployment time (container-managed
persistence).</para></blockquote>
</para>
+
+ <para>For more on CMP with JBoss, see <xref
linkend="faq.cmp"/></para>.
</answer>
</qandaentry>
@@ -166,7 +168,7 @@
<question><para>What are these MBeans and JMX that I keep hearing
about?</para></question>
<answer>
<para><quote>Managed Beans</quote> are part of the Java Management
Extensions Specification<ulink
url="http://java.sun.com/products/JavaManagement/";>(JMX)</ulink> (formerly JMAPI).
This provides an architecture and API for application management using Java. JBoss has
made JMX its own and it forms the basis of the entire JBoss infrastructure. JBoss is
basically a series of MBean service components plugged together using JMX as the bus.
See the <link linkend="design.jmx">design notes</link> for more information.</para>
- <para>For an in-depth explanation of JMX and its potential uses, see
the forthcoming book by Juha Lindfors FIXME ref, date.</para>
+ <para>For an in-depth explanation of JMX and its potential uses, see
the forthcoming book <ulink
url="http://www.samspublishing.com/detail_sams.cfm?item=0672322889";>JMX: Managing J2EE
with Java Management Extensions</ulink> by Juha Lindfors.</para>
</answer>
</qandaentry>
@@ -178,7 +180,6 @@
<para>The <ulink
url="http://java.sun.com/j2ee/j2ee-1_3-fr-spec.pdf";>J2EE Specification</ulink>.</para>
</listitem>
</itemizedlist>
-
</answer>
</qandaentry>
@@ -483,28 +484,29 @@
<!-- End of EJB section -->
<!-- CMP stuff -->
- <qandadiv>
+ <qandadiv id="faq.cmp">
<title>Container-Managed Persistence (CMP)</title>
<para>CMP implementations, spec versions etc.</para>
<qandaentry>
<question><para>What is CMP and how do I use it with
JBoss?</para></question>
<answer>
- <para>...</para>
-
+ <para>You can write a basic CMP app. with minimal effort beyond that
of the standard approach described in the EJB spec.</para>
+ <para>In JBoss 2.*, the default CMP engine is called Jaws, and you
can supply additional configuration information by providing a
<filename>jaws.xml</filename> file in addition to the standard
<filename>ejb-jar.xml</filename> file.</para>
+ <para>For JBoss 3.*, see <xref linkend="faq.cmp.cmp2"/></para>
</answer>
</qandaentry>
- <qandaentry>
+ <qandaentry id="faq.cmp.cmp2">
<question><para>Does JBoss support the CMP features from EJB
2.0?</para></question>
<answer>
- <para>Support for EJB 2.0 CMP is a central feature for JBoss
3.0</para>
- <para>You can purchase <ulink
url="http://www.flashline.com/Components/View.jsp?prodid=4312";>full
documentation</ulink> for the CMP 2.0 engine, written by the author.</para>
+ <para>Support for EJB 2.0 CMP is a central feature of JBoss 3.0 and
is provided by the JBossCMP module, which is the default persistence engine. Advanced
configuration is achieved by use of the <filename>jbosscmp-jdbc.xml</filename>
file.</para>
+ <para>You can purchase a Workbook for the CMP 2.0 engine, written by
the author, from <ulink
url="http://www.flashline.com/components/productsbyvendor.jsp?&vendorid=1376";>flashline</ulink>.
This provides advanced configuration details for JBossCMP, along with example
code.</para>
</answer>
</qandaentry>
<qandaentry>
- <question><para>What alternatives are there to the default
implementation?</para></question>
+ <question><para>What alternatives are there to the default CMP
implementation?</para></question>
<answer>
<para>... <!-- Integration with other persistence engines, Cocobase,
write your own persistence layer?--> </para>
</answer>
@@ -542,7 +544,7 @@
<qandaentry id="faq.resource.newbie">
<question><para>I'm new to this stuff and I don't even know what a
DataSource is.</para></question>
<answer>
- <para>A <ulink
url="http://java.sun.com/j2se/1.4/docs/api/javax/sql/DataSource.html";>DataSource</ulink>
is the preferred Java abstraction for obtaining database connections. You will
usually set up datasources as part of your server configuration along with a name
under which it will be bound in the server's JNDI implementation. The DataSource
usually also hides the implementation of connection pooling from the client.</para>
<!-- link to BMP example? -->
+ <para>A <ulink
url="http://java.sun.com/j2se/1.4/docs/api/javax/sql/DataSource.html";>DataSource</ulink>
is the preferred Java abstraction for obtaining database connections. You will
usually set up datasources as part of your server configuration along with a name
under which each one will be bound in the server's JNDI implementation. The DataSource
usually also hides the implementation of connection pooling from the client.</para>
<!-- link to BMP example? -->
</answer>
</qandaentry>
@@ -593,7 +595,7 @@
<qandaentry>
<question><para>How do I configure Database X to work with
JBoss?</para></question>
<answer>
- <para>...</para>
+ <para>There are database-specific examples in the <link
linkend="resource-db-specific">manual</link>.</para>
</answer>
</qandaentry>
@@ -710,4 +712,4 @@
</qandaset>
-</article>
+</article>
\ No newline at end of file
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