itech9

Porting JBoss EJB3s to WebLogic is not trivial.. Here are some of the compliance exceptions:

• weblogic.ejb.container.compliance.ComplianceException: Home methods are not allowed on session beans: BookTestBean.test()




• weblogic.ejb.container.compliance.ComplianceException: In EJB BookTestBean, method test() on the home interface does not throw java.rmi.RemoteException. This is a required exception.




• weblogic.ejb.container.compliance.ComplianceException: In EJB BookTestBean, the home interface de.laliluna.library.BookTestBeanLocal must extend the javax.ejb.EJBHome interface.




• weblogic.ejb.container.compliance.ComplianceException: In EJB BookTestBean, the home interface of a stateless session bean must have one create method that takes no arguments.




• weblogic.ejb.container.compliance.ComplianceException: In EJB BookTestBean, the return type for the home create method create() must be the remote interface type of the bean.

Persistence-related exception:

org.apache.openjpa.util.MetaDataException: “de.laliluna.library.Book.id” declares generator name “book_sequence”, but uses the AUTO generation type. The only valid generator names under AUTO are “uuid-hex” and “uuid-string”.

To fix it, change this:

// For JBoss
@GeneratedValue(strategy = GenerationType.AUTO, generator = "book_sequence")

to this:

// For WebLogic
@GeneratedValue(strategy = GenerationType.AUTO)

More on persistence.. the default provider for WebLogic is a package named ‘Kodo’.
To set the OpenJPA (Java Persistence API) provider, add the element
to persistence.xml , like this:

<persistence xmlns="http://java.sun.com/xml/ns/persistence"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
    http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
             version="1.0">

        <persistence-unit name="FirstEjb3Tutorial" transaction-type="JTA">
                <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
                <properties>
                        <property name="openjpa.ConnectionURL" value="jdbc:pointbase:server://localhost:18888/fe3t"/>
                        <property name="openjpa.ConnectionDriverName" value="com.pointbase.jdbc.jdbcUniversalDriver"/>
                        <property name="openjpa.ConnectionUserName" value="fe3t"/>                   
                        <property name="openjpa.ConnectionPassword" value="fe3t"/>
                        <property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema"/>
                </properties>
        </persistence-unit>
</persistence>

Note the “openjpa.” qualifier .. Persistence will not work without it ..

1. ejbCreate, ejbPostCreate
2. ejbLoad, ejbStore
3. ejbActivate, ejbPassivate

From http://90kts.com/2008/monitoring-weblogic-using-jmx-in-sitescope/

— Using the WL Scripting Tool (WLST)
If you are working on the WL server you can use the WL Scripting Tool to browse the available Runtime beans:
D:\Data\bea\wlserver_10.0\server\bin>setWLSEnv.cmd
D:\Data\bea\wlserver_10.0\server\bin>java weblogic.WLST
connect(‘username’,’password’,’t3://host:8003′)
serverRuntime()
ls()
cd(“JMSRuntime”)
ls()
cd(“server01_01.jms”)
ls()
…

— Administer IIOP, Channels (t3)

Environment->Servers->[myServer]->Protocols [tab]

— After installing the server, run the configuration and setup the “base_domain”.

— The “base_domain” directory is parallel to the “wlserver_10.3” directory.
IOW: If the root path to the installation directory is “/Oracle/mw”, the “wlserver_10.3” is here:

/Oracle/mw/wlserver_10.3/

and “base_domain” is here:

/Oracle/mw/user_projects/domains/base_domain

The “base_domain/bin” (and the other domains) directory contains scripts:

startWebLogic.sh
stopWebLogic.sh

— If you cannot log into the administration console, change this file:

/Oracle/mw/user_projects/domains/base_domain/servers/AdminServer/security/boot.properties

from this (like this..):

password={AES}YuEG0y256Pm/62pegV3K9gBCJPGvi/j4obebUm2gEXA\=
username={AES}gx1/5/947m0Q+bKUqDaRqvN8gJWJnGkX/y/BehtLDPQ\=

to this:

password=weblogic
username=weblogic

(or whatever user/password you wish)

and restart the server. If you cannot stop the server, do a “kill -1 pid” with the server “pid”.

— I find the weblogic app structure confusing..
I am sure that there is a good reason for this
and I just do not know it but it is still confusing..

There are

/Oracle/mw/user_projects/domains/APPS/..

and there are

/Oracle/mw/wlserver_10.3/APPS/domains/..

Just be aware ..

wget –recursive -x -l 0 -e robots=off –wait 1 \
-U Mozilla –no-parent –user=user –password=password \
https://hudson.dev.java.net/svn/hudson/trunk/hudson/plugins/ivy/

From http://www.devx.com/Java/Article/32730

• Tomcat Resource Pools.

  Connector Thread Pool

  Database Connection Pool

• Use Tomcat Valves for implementing lightweight monitoring w/o JMX.

• — SOA – Service Oriented Architecture
  — 3 major roles: Provider, Registry (Broker) and Requester.
  — SOA is based on web services.
• — SOAP – Simple Object Access Protocol
  — 2 major methods: Message-based Document Exchange AND RPC
  (Remote Procedure Calls).
  — All structures based on XML.
  — A SOAP message contains an Envelope and a Header.
  — A SOAP message may contain (MIME) attachments.
  — Main transport protocol is HTTP(S).
  — Providers (Receivers) are usually based on Servlets.
• — SOAP-RPC
  — Method signatures contain a single SOAP structure.
  — SOAP service methods must match info in deployment descriptor.
  — Errors and Faults: VersionMismatch, MustUnderstand, DTDNotSupported, etc..
• — WSDL – Web Services Description Language
  — WSDL is an XML grammar for describing a web service
  as a collection of access end-points capable of exchanging
  messages in a procedure- or document-oriented fashion (p. 72)
  — The reasonable flow is to create service methods and
  than generate WSDL from code using tools.
  — Best practices: web service is (functionally) coarse-grained
  and messages are more business-oriented than programmatic.
• — UDDI – Universal Description, Discovery and Integration
  — Similar to an Internet search engine for businesses.
  — UBR – UDDI Business Registry (the Public Cloud).
  — Designed for B2B mostly.
  — 2 APIs: inquiry and publishing API.
  — JAXR = Java API for XML Registries.
  — Some details: Categorization (NAICS, ISO, etc..),
  Identifier (DUNS, Thomas Reg, etc),
  tModel (web service metadata)
• — JAX-RPC and JAXM
  — JAXM = Java API for XML Messaging.
  — JAX-RPC = Java API for XML-based RPC.
  — JAXM may be used as a frontend to SOAP-based messaging
  frameworks through the use of “profiles”.
  — JAX-RPC covers code generation for client and server parts,
  dynamic SOAP, creating services within J2EE and J2SE environments,
  bindings, serialization, mapping of datatypes between WSDL and Java,
  etc..
• — The Java Web Service (JWS) Standard
  — Proposed by BEA, using templates to create simple web services.
  — Example (HelloWorld.jws <- note the .jws extension)
  Note the annotations @operation, @conversation ..

  import com.bea.jws.*
  
  public class HelloWorld extends Service {
    /**
    * @operation
    * @conversation stateless
    */
    public String getHelloWorld() {
      return "Hello, World!";
    }
  }
  

  Other values for @conversation are ‘start’, ‘continue’ or
  ‘finish’. The ‘start’ directive, for example, starts a session.

• — Security notes
  — Use of SSL (HTTPS), encryption, signing and secure hashing.
  — Security Assertion Markup Language (SAML) – used with Single Sign-On (SSO).
• — Resources
  http://aws.amazon.com/
  http://seekda.com/
  http://www.programmableweb.com/
  http://www.webservices.org/
  http://xmethods.com/

Colophon – European (Alpine) Ibex – a wild goat.

Fastest way to plug tomcat into apache httpd..

Change apache2.conf, add:

<Location /your_tomcat_app>
  ProxyPass ajp://your_host:8009/your_tomcat_app
  Order allow,deny
  allow from all
</Location>

More notes on Hudson here:

http://suereth.blogspot.com/2008/08/ubuntu-dev-server-hudson.html

Hudson is here:

https://hudson.dev.java.net