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h4. *Configure the OC4J stand alone server*
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The above change is made to prevent *PermGEN* errors for occurring.  If you get *PermGen Out of Memory* errors when either deploying your application or when starting the oracle server, increase the 512M values to 1024M.
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# Edit the file $\{ORACLE_HOME}/j2ee/home/config/system-application.xml and change:

{code

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<import-shared-library name="oracle.toplink">

{code}to:

{code

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<!--import-shared-library name="oracle.toplink"-->

{code}
If you want to disable the *Oracle Enterprise Manager* then change

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<import-shared-library name="oracle.xml"/>

{code}to:

{code

}
<!--import-shared-library name="oracle.xml"/ -->

{code}
When you are satisfied that everything is correct, *SAVE* your changes.

# We need to add a datasource so that the applications can pull data from the database.

  Edit $\{ORACLE_HOME/j2ee/home/config/data-sources.xml to add a datasource.

  Here's an example of adding a MITSIS datasource:

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{code}
<data-source
    class="com.evermind.sql.DriverManagerDataSource"
    name="OracleDS2"
    location="jdbc/MitsisDS"
    xa-location="jdbc/xa/StargateXADS-unused"
    ejb-location="jdbc/OracleDS-unused"
    connection-driver="oracle.jdbc.driver.OracleDriver"
    username=""
    password=""
    url="jdbc:oracle:thin:@//earth-vault-2.mit.edu:1523/sundev11"
    inactivity-timeout="30"
/>
{code}

where obviously *you MUST add your username and password.

*  If you do not have a username and password, request a them from your team leader.
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When you are satisfied that everything is correct, *SAVE* your changes.
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# *FOR WINDOWS ONLY* \- setting the administrator's password
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Open a CMD window and cd to the $\{ORACLE_HOME}/bin directory.  Type the following command:

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oc4j -start

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You will be asked to enter and confirm a password.

  Pick a password that is easy for you to remember.  You will need to use this password when configuring Maven.
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{anchor:parser configuration}
# In order to use Spring 3.X with OC4J 10.1.3, you'll need to swap out the default XML parser in OC4J with something more modern.

  xercesImpl.jar and xml-apis.jar work fine.

  To swap the parser out, you need to create a new shared library in the OC4J enterprise manager and then edit the system-application.xml file to use your new shared library instead of the Oracle XML parser.

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Start and stop the OC4J server.
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Open *$\{ORACLE_HOME}/j2ee/home/application-deployments/default/orion-application.xml* with a text editor.

  If the file or any sub-directory does not exist, create them as needed.

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If you had to create the file a new, these are the contents of the file:
{code}
<?xml version='1.0' encoding='utf-8'?>
<orion-application
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:noNamespaceSchemaLocation="http://xmlns.oracle.com/oracleas/schema/orion-application-10_0.xsd"
    schema-major-version="10"
    schema-minor-version="0"
    component-classification="internal">
    <imported-shared-libraries>
        <remove-inherited name="oracle.xml"/>
    </imported-shared-libraries>
</orion-application>

{code}
If you had an existing file, add this block to it:

{code

}
<imported-shared-libraries>
    <remove-inherited name="oracle.xml"/>
</imported-shared-libraries>
{code}

When you are satisfied that everything is correct, *SAVE* your changes.

# *FOR ALL OPERATING SYSTEMS* \- how to change the administrator password.

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Open *$\{ORACLE_HOME}/j2ee/home/config/system-jazn-data.xml* with a text editor.

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Find the <user> tag block for oc4jadmin.&nbsp;&nbsp;Change the oc4jadmin's <credentials> property to (substituting your password for myNewPassowd):

{code

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<credentials>!myNewPassword</credentials>
{code}

Be sure to preface the password with an \! to inidcate that this is a plain text value.

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When completed, the oc4jadmin <user> should look something like:

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<user>
    <name>oc4jadmin</name>
    <display-name>OC4J Administrator</display-name>
    <guid>E33D5A508AA511DF8F573778FB23EDF8</guid>
    <description>OC4J Administrator</description>
    <credentials>!myNewPassword</credentials>
</user>

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Save the changes and restart the OC4J server.

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<orion-web-app
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:noNamespaceSchemaLocation="http://xmlns.oracle.com/oracleas/schema/orion-web-10_0.xsd"
  jsp-cache-directory="./persistence"
  servlet-webdir="/servlet"
  development="true"
  jsp-timeout="0"
  jsp-cache-tlds="standard"
  schema-major-version="10"
  schema-minor-version="0">

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# Turn on debug mode. In the "jsp" servlet section, set a parameter debug_mode to true. The section should look like this:

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}
<servlet>
      <servlet-name>jsp</servlet-name>
      <servlet-class>oracle.jsp.runtimev2.JspServlet</servlet-class>
      <init-param>
        <param-name>debug_mode</param-name>
        <param-value>true</param-value>
      </init-param>
      <load-on-startup>0</load-on-startup>
</servlet>

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With these settings, you should get more meaningful messages in your browser when you run into certain errors (JSP syntax errors for example).

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