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{composition-setup}
{composition-setup}
h1. {anchor:install-openejb}Install openejb.war

Once Tomcat has been [installed|Tomcat Installation], the OpenEJB plugin for Tomcat can be installed.  The commands in this example are executed from within the Tomcat installation directory.

h2. Unpack OpenEJB Tomcat plugin in Tomcat webapps directory

{warning:title=Be Careful}This is the most error prone step.  A web application does not contain a root directory, so if you unpack it in the wrong directory, it is difficult to undo.  Please, follow this step closely, and most importantly *make sure you execute the unpack command from within the new webapps/openejb directory*.{warning}

Due to the structure of war files, you must create a new directory for OpenEJB, change to the new directory and execute the unpack command from within the new directory.  If you get this wrong, it is difficult to undo, so follow the steps closely.

{deck:id=unpack tomcat}
{card:label=Windows}{noformat:nopanel=true}
C:\apache-tomcat-6.0.14>mkdir webapps\openejb

C:\apache-tomcat-6.0.14>cd webapps\openejb

C:\apache-tomcat-6.0.14\webapps\openejb>jar -xvf \openejb.war
  created: WEB-INF/
  created: WEB-INF/classes/
  created: WEB-INF/classes/org/
  created: WEB-INF/classes/org/apache/
  created: WEB-INF/classes/org/apache/openejb/
...snip...

C:\apache-tomcat-6.0.14\webapps\openejb>dir
 Volume in drive C has no label.
 Volume Serial Number is 0000-0000

 Directory of C:\apache-tomcat-6.0.14\webapps\openejb

09/21/2007  10:19 AM    <DIR>          .
09/21/2007  10:19 AM    <DIR>          ..
09/21/2007  10:19 AM             1,000 index.html
09/21/2007  10:19 AM    <DIR>          lib
09/21/2007  10:19 AM            11,358 LICENSE
09/21/2007  10:19 AM    <DIR>          META-INF
09/21/2007  10:19 AM            11,649 NOTICE
09/21/2007  10:19 AM             1,018 openejb.xml
09/21/2007  10:19 AM             1,886 README.txt
09/21/2007  10:19 AM    <DIR>          tomcat
09/21/2007  10:19 AM    <DIR>          WEB-INF
               5 File(s)         26,911 bytes
               6 Dir(s)   4,633,796,608 bytes free

C:\apache-tomcat-6.0.14\webapps\openejb>cd ..\..

C:\apache-tomcat-6.0.14>
{noformat}{card}
{card:label=Unix}{noformat:nopanel=true}
apache-tomcat-6.0.14$ mkdir webapps/openejb

apache-tomcat-6.0.14$ cd webapps/openejb/

apache-tomcat-6.0.14/webapps/openejb$ jar -xvf path/to/openejb.war 
  created: WEB-INF/
  created: WEB-INF/classes/
  created: WEB-INF/classes/org/
  created: WEB-INF/classes/org/apache/
  created: WEB-INF/classes/org/apache/openejb/
...snip...

apache-tomcat-6.0.14/webapps/openejb$ ls
LICENSE      META-INF/    NOTICE       README.txt   WEB-INF/     index.html   lib/         openejb.xml  tomcat/

apache-tomcat-6.0.14/webapps/openejb$ cd ../..

apache-tomcat-6.0.14$
{noformat}{card}
{deck}

h2. Add the OpenEJB listener to Tomcat 

All Tomcat listener classes must be available in the Tomcat common class loader, so the openejb-loader jar must be copied into the Tomcat lib directory.

{deck:id=copy openejb loader}
{card:label=Windows}{noformat:nopanel=true}
C:\apache-tomcat-6.0.14>copy webapps\openejb\lib\openejb-loader-3.0.0-SNAPSHOT.jar lib\openejb-loader.jar
        1 file(s) copied.
{noformat}{card}
{card:label=Unix}{noformat:nopanel=true}
apache-tomcat-6.0.14$ cp webapps/openejb/lib/openejb-loader-*.jar lib/openejb-loader.jar
{noformat}{card}
{deck}

Add the following {highlight}highlighted lines{highlight} to your conf/server.xml file to load the OpenEJB listener:
 
{panel:title=conf/server.xml}
<!-- Note:  A "Server" is not itself a "Container", so you may not
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;define subcomponents such as "Valves" at this level.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Documentation at /docs/config/server.html
 -->
<Server port="8005" shutdown="SHUTDOWN">
&nbsp;&nbsp;{highlight}<!-- OpenEJB plugin for tomcat -->{highlight}
&nbsp;&nbsp;{highlight}<Listener className="org.apache.openejb.loader.OpenEJBListener" />{highlight}

&nbsp;&nbsp;<!--APR library loader. Documentation at /docs/apr.html -->
&nbsp;&nbsp;<Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />
...snip...
{panel} 

h2. Update the Tomcat annotations-api.jar file

Tomcat contains an old non-compliant version of the javax.annotation classes and these invalid classes must be updated so OpenEJB can process annotations.  Simply, replace the annotations-api.jar in the Tomcat lib directory with the updated annotations-api.jar in the OpenEJB war.

{deck:id=update annotations-api.jar}
{card:label=Windows}{noformat:nopanel=true}
C:\apache-tomcat-6.0.14>copy webapps\openejb\tomcat\annotations-api.jar lib\annotations-api.jar
Overwrite lib\annotations-api.jar? (Yes/No/All): y
        1 file(s) copied.
{noformat}{card}
{card:label=Unix}{noformat:nopanel=true}
apache-tomcat-6.0.14$ cp webapps/openejb/tomcat/annotations-api.jar lib/annotations-api.jar 
{noformat}{card}
{deck}

h2. Add OpenEJB javaagent to Tomcat startup

OpenJPA, the Java Persistence implementation used by OpenEJB, currently must enhanced persistence classes to function properly, and this requires the installation of a javaagent into the Tomcat startup process.

First, copy the OpenEJB JavaAgent jar into the lib directory.

{deck:id=unpack tomcat}
{card:label=Windows}{noformat:nopanel=true}
C:\apache-tomcat-6.0.14>copy webapps\openejb\lib\openejb-javaagent-3.0.0-SNAPSHOT.jar lib\openejb-javaagent.jar
        1 file(s) copied.
{noformat}{card}
{card:label=Unix}{noformat:nopanel=true}
apache-tomcat-6.0.14$ cp webapps/openejb/lib/openejb-javaagent-*.jar lib/openejb-javaagent.jar
{noformat}{card}
{deck}

Simply, add the following {highlight}highlighted lines{highlight} to the bin/catalina.bat (Windows) or bin/catalina.sh (Unix) file to enable the OpenEJB javaagent:

{deck:id=update script}
{card:label=Windows}
{panel:title=bin/catalina.bat}
...snip...
if not exist "%CATALINA_BASE%\conf\logging.properties" goto noJuli
set JAVA_OPTS=%JAVA_OPTS% -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.util.logging.config.file="%CATALINA_BASE%\conf\logging.properties"
:noJuli

{highlight}rem Add OpenEJB javaagent
if not exist "%CATALINA_BASE%\webapps\openejb\lib\openejb-javaagent.jar" goto noOpenEJBJavaagent
set JAVA_OPTS="-javaagent:%CATALINA_BASE%\webapps\openejb\lib\openejb-javaagent.jar" %JAVA_OPTS%
:noOpenEJBJavaagent{highlight}

rem ----- Execute The Requested Command ---------------------------------------

echo Using CATALINA_BASE:   %CATALINA_BASE%
echo Using CATALINA_HOME:   %CATALINA_HOME%
...snip...
{panel} 
{card}
{card:label=Unix}
{panel:title=bin/catalina.sh}
...snip...
\# Set juli LogManager if it is present
if [ -r "$CATALINA_BASE"/conf/logging.properties ]; then
&nbsp;&nbsp;JAVA_OPTS="$JAVA_OPTS "-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager" "-Djava.util.logging.config.file="$CATALINA_BASE/conf/logging.properties"
fi

{highlight}\# Add OpenEJB javaagent
if [ -r "$CATALINA_BASE"/webapps/lib/openejb-javaagent.jar ]; then
&nbsp;&nbsp;JAVA_OPTS=""-javaagent:$CATALINA_BASE/lib/openejb-javaagent.jar" $JAVA_OPTS"
fi{highlight}

\# ----- Execute The Requested Command -----------------------------------------

\# Bugzilla 37848: only output this if we have a TTY
if [ $have_tty -eq 1 ]; then
&nbsp;&nbsp;echo "Using CATALINA_BASE:   $CATALINA_BASE"
...snip...
{panel} 
{card}
{deck}

*NOTE:* The example above is an excerpt from the middle of the bin/catalina.sh file.  Search for "Execute" in the file to locate the correct position in the file to add the new lines.