Partner Webcast - Migration to Weblogic Server 11g

Migrate to Oracle WebLogic Server 11g
Lukasz Romaszewski
ISV Migration Consultant
Oracle

ISV Migration Center Team
Who we Are ISV Migration Center Team is a team of senior technical consultants based in Eastern and Central Europe and represents Oracle's technical investment for partners.
Mission Statement Enable partners to rapidly and successfully adopt and implement Oracle latest technology
What do we Offer Whether you are selling Oracle technology, building business solutions, including hosted Internet solutions or providing system integration and implementation services for Oracle technology, IMC Team can help you succeed.
How can we assist We offer a wide range of free services for partners such as one2one assistance, webinars, seminars and hands-on workshops.
For more information, visit the IMC website.
Contact: Ruxandra Radulescu, ruxandra.radulescu@oracle.com
ISV Migration Center Manager, Eastern & Central Europe and CIS

Agenda
Introduction to the Oracle WebLogic Server 11g
Migration Process overview
Migrating from iAS 10g
SmartUpgrade utility introduction
SmartUpgrade Demo
Migrating from other JEE application servers
Understanding potential caveats
Using WebLogic classloader mechanism to isolate application
Shared libraries overview
Migrating Oracle Fusion Middleware components (Forms&Reports, ADF, SOA etc)
Summary
Q&A

Oracle Fusion Middleware
Application Server, TP – Monitor, Java VM, Grid

Oracle Fusion MiddlewareRuns on the WebLogic Suite
Content
Management
Suite
Identity
Management
Suite
Business
Intelligence
Suite
SOA
Suite
WebCenterSuite
Java EE/ISVApps
WebLogic Suite
WebLogic Server
Java EE: Reliability, Availability, Scalability & Performance
Enterprise Manager
Development Tools
Coherence EE
Admin and Operations
Jdeveloper/Eclipse
High Performance, Reliable, Scale Out for Java, C++ and .NET
JRockit Real Time
High Performance JVM with Extreme Low Latency
Cost, Power, Hardware Efficient
Risk-free Scale-up and Scale-out
Higher performance and reliability

Java Standard Support
6.0
Java SE
5.0
Java EE
JDBC 4.0 √
√
WebLogic Server Java EE 5.0 and Java SE 6.0
Standards Compliant
Certified JEE 5.0 Compatible
Latest version: JPA 2.0 & JSF 2.0 compliant
High Performance
Advanced Security
Enterprise Messaging
Web Services
Integrated Operations & Administration
Integrated, Productive Development Tools
Open Source Certified
√
JSP 2.1
√
JSF 1.2, 2.0
√
Servlet 2.5
√
EJB 3.0
√
JAX-WS 2.1
√
JMS 1.1
√
JNDI 1.2
√
JCA 1.5
√
JTA 1.1
√
JMX 1.2
√
Java EE Deployment 1.2
√
Java EE Management 1.1

Identity
Management
Suite
Business
Intelligence
Suite
Content
Management
Suite
SOA
Suite
WebCenterSuite
Java EE/ISVApps
Web
Services
EJB
Business
Logic
POJO
JSF/Servlet
Web 2.0
JMS
Messaging
JCA
Connectivity
WorkloadManagement
PersistenceInfrastructure
Protocol
Handling
Security
Connection
Pooling
Transactions
WebLogic Server InfrastructureJava EE 5, Persistence, Messaging and Web Services
Oracle Fusion Middleware and Oracle Applications
WebLogic Kernel – Reliability, Availability, Scalability, Performance
WebLogic Server
Middleware Administration Server

WebLogic Cluster
JMS Server
JMS Server
JMS Server
JMS Server
WebLogic JMS ExtensionsDesigned to Scale to the Most Complex SOA Integrations
Messages red and grey have separate UOO
Unit of Order
Messages tagged with same Unit of Order (UOO) are processed in order
Stronger ordering semantics than the JMS specification
Unit of Work
Messages are grouped with a group identifier
Messages at final destination become available only when entire group arrives
Store and Forward Messaging
Store messages on local server and forward to remote server when available
Store and forward for clients to server and server to server
Distributed Destinations
All queues and topics in a cluster appear as a single logical destination to clients
Provides high availability and scalability; parallel processing and load balancing
1
2
3
4
5
6
7
8
9
MDB 2
MDB 3
MDB 1
Message 3/4 not processed until 1/2 processed
MDB 1
1
MDB 3
Producer
2
2
3
1
MDB 2
3
WebLogic
WebLogic
Forward when Target Available
JMS Server
JMS Server
Client
Logical
Destination

Running on the World’s Fastest Java VM
Complete implementation of Java
100% compatible with the Java SE and ”bug compatible” with the Sun Java implementation
Underpins Oracle Fusion Middleware product stack
One-stop shop for support issues
Optimized stack
Architected and optimized for server-side Java
High Performance
Typical benefit is ~20% over Sun Java VM based on benchmarking
Customer feedback & surveys
* Oracle JRockit has been used for all world record SPECjbb2005 publications since Q2 2006. Best results based on Sun, JRockit and IBM as of September 8, 2008 are (bops/bops per JVM): Sun Fire E25K (2105264/29240), SGI Altix 4700 (5180451/80945), IBM Power 595 (3435485/107359). For full details see http://wws.spec.org. SPEC and SPECjbb2005 are trademarks of Standard Performance Evaluation Corporation.

With Near Zero Application Pause TimesJRockit Real Time
Traditional Java VM – Stop the World Pauses
Guaranteed maximum response times
Java EE applications consistently under 100ms pause times
Java SE tuned can be single-digit ms pause times
Deterministic QoS under heavy load
No code re-writes
Remove weeks of tuning with simple declarative setting
Deterministic setting
Pause time target
JRockit - < 10 ms Pause

Device
View
Controller
Model
Application Development FrameworkMVC Development Framework
Device & Browser Adaptation
JSF Components
Ajax & DHTML
Flash
JSF Page Flow
JSR 227 Data Binding
O-R Mapping
EJB 3, JPA

WebLogic Server Diagnostics
WebLogic Diagnostics Framework
Built into the server
Real time diagnostisics for administrators
Generate diagnostics dumps when thresholds exceeded
Rich client-side UI (JFC/Swing)‏
JRockit Mission Control
JVM diagnostics for JRockit JVM
Targeted at production environments for developers
Application Diagnostics for Java
Diagnostics for non-JRockit JVMs
Targeted at production environments for developers and administrators

Web services
Web services
Oracle Coherence Data Grid
Provides a reliable data tier with a single, consistent view of data
Independent of yet integrated with database and application server
Enables dynamic data capacity including fault tolerance and load balancing
Ensures that data capacity scales with processing capacity
Enterprise Applications
Real Time Clients
Data Services
Oracle CoherenceData Grid
Mainframes
Databases

C++, .NET, Word, Excel, Visual Basic …
App Machines
Java Applications
Java/JEE Container
Application
Coherence Client
Coherence (Java)‏
Coherence (Java)‏
Named Cache
Named Cache
Scaling WebLogic with CoherenceArbritrary Clients – Java, .NET, C++
WebLogic Machines
App Machines
WebLogic Cluster
Applications
Managed WLS
Managed WLS
.NET, C++
Application
Application
Application
Coherence Client
Coherence Client
Coherence Extend
Coherence (Java)‏
Coherence (Java)‏
Coherence (Java)‏
Named Cache
Named Cache
Named Cache
Cache Store
Cache Store
Cache Store
Cache Store
Cache Store
Cluster Service
Synchronous/Asynchronous
Synchronous/Asynchronous

Agenda
SmartUpgrade Demo
Summary
Q&A

Migration To Oracle WebLogic Server 11g
First make sure you understand the WebLogic Server architecture and topology
Analyze your current installation and create target WebLogic environment (domain(s), instances, clusters, datasources etc.)
Migrate your application
Deploy the application on WebLogic Server
Test, tune, make necessary adjustments...

Oracle WebLogic Server 11g Topology
Admin Server
config.xml
Managed Servers
Admin Console

Some important facts about WebLogic topology...
A Weblogic Server instance is always part of a Weblogic Server Domain (no standalone instances)
A Weblogic Server Domain is managed, configured, and monitored by an Administration Server
A Weblogic Server installation can be used to configure multiple domains
A Weblogic Server instance always runs as a single Java VM process
A Weblogic Server instance by default uses only one single port (7001) for all type of requests
A Weblogic Server instance does not support AJP, only pure HTTP

Agenda
SmartUpgrade Demo
Summary
Q&A

Oracle Strategy for custom Java EE Applications
Comprehensive Documentation
OC4J to WLS Upgrade White Paper – Available under NDA
Upgrade Guide for Java EE – With OFM 11gR1 release
WebLogic SmartUpgrade
Enables OC4J customers to systematically upgrade their custom Java EE applications to WebLogic Server
Professional Services Offerings
ISV Migration Center
Oracle Consulting
Oracle Partners

Identity
Management
Suite
Business
Intelligence
Suite
Content
Management
Suite
SOA
Suite
WebCenterSuite
Java EE/ISVApps
Security
Diagnostics
MDS
TopLink
ADF
JMX Framewrk
…
Java Required Files
OC4J Features available in WebLogicJava Required Files
Oracle Fusion Middleware and Oracle Applications
WebLogic Server/WebSphere/JBoss

Custom Java EE Application Upgrade
Oracle Documentation
WebLogic SmartUpgrade

OC4J vs WebLogic - Topology Comparison

Agenda
SmartUpgrade Demo
Summary
Q&A

WebLogic SmartUpgrade Design
JDeveloper Interface
- Enhanced Findings Management
Command Line Interface
Application Artifacts
Report
- Findings
- Scoping Metrics
JDev Project
JDev Project
Generates
Input To
Analysis Engine
Code Analysis
- JSP
- Java
Container Config. Analysis
PDD Analysis
JAR, WAR, or EAR
Generates
WebLogic PDDs
Source Directory
Uses
Knowledge Base
Container Configuration
PDD Rules
Code Rules
Container Config. Rules
OC4J JEE Instances

WebLogic SmartUpgrade MethodologyApplication Level
2. Compare metrics
against previous runstrack to project benchmarks
1. (Re-) Run findings report
3. Analyze findings
Iterative
upgrade
methodology
managed
by upgrade
metrics
OC4J Application & OC4J Container Configuration
WebLogic Applicationand WebLogic Configuration
6. Take action onnon-automatedfindings andupdate project
4. Archive findings for
comparison afterchanges applied
5 Accept findings
code/PDD/script
generation

WebLogic SmartUpgrade Knowledge Base - Categories
api
Application code is importing APIs which fall within any of the following categories
Public Oracle APIs
Private Oracle APIs
Known 3rd Party APIs
classloading, cluster, data-source, ejb, jca, jms, jmx, jndi, jsp, jta, rmi, security, web, web-services
Application and OC4J instance configuration targeted knowledge

SmartUpgrade JDeveloper Interface

Agenda
SmartUpgrade Demo
Summary
Q&A

SmartUpgrade Demo

Agenda
SmartUpgrade Demo
Summary
Q&A

Migrating JEE application to WebLogic
Analize your application
uses EJBs, what version?
uses JMS, MDBs?
uses third-party libraries (e.g. Hibernate, Spring, etc.)?
uses vendor-specific APIs (e.g. JBoss Cache)?
Create WebLogic-specific deployment descriptors:
weblogic.xml
weblogic-ejb-jar.xml
weblogic-ra.xml
weblogic-application.xml
Try deploying your application...

Agenda
SmartUpgrade Demo
Summary
Q&A

Migrating JEE application to WebLogicthings to remember
Always make EAR archive – you gain much more configuration options
Identify any third-party libraries and package them into the EAR archive (/lib or /APP-INF/lib)...
... or deploy them as shared libraries and reference from your application
Set filtering classloader to isolate your application classes (solves most of the ClassNotFoundException problems)

Migrating JEE application to WebLogicthings to remember cont.
If you encounter NullPointerException related to
getServletContext().getRealPath(<resource>)
set the following option:
<Web module>.war
WEB-INF
weblogic.xml
<container-descriptor>
<show-archived-real-path-enabled>true</show-archived-real-path-enabled>
</container-descriptor>

Agenda
SmartUpgrade Demo
Summary
Q&A

How Java loads classes

Class Loading in JEE
Applications e.g. .ear’s run each have their own Class Loaders which are usually children of the System Class Loaders
Closely related to deployment architecture
Why? Among the many reasons:
Needed to support dynamic redeployment
Application isolation e.g. different version of Log4J in app1.ear and app2.ear

Example of classloader hierarchy in WebLogic Server
System Class Loader
WebLogic Server
App1
App2
myejb1.jar myeb2.jar
myejb3.jar
mywar1.war
mywar2.war
mywar3.war

Does not load classes. Prevents classes from being loaded from system if they match the filter-list
Filtering
(filter-list barrier)
Loads classes in EARs and any libraries referenced by the EAR
lib/*.jar,
APP-INF/classes/**.class,
APP-INF/lib/*.jar
MANIFEST classpath
Application
(EAR application & EAR library classes )
Module
Loader
Module
Loader
Module
Loader
...

WEB-INF/classes/**.class,
WEB-INF/lib/*.jar
MANIFEST Classpath
Web Application
(webapp & webapp-library classes )
All tag files are loaded in their own classloader to enable refresh
Tag
(tag files – WEB-INF/tags/*.tag etc.)
Each JSP is loaded in its own classloader to enable refresh
JSP
JSP
JSP

Filtering Classloader
Load classes from application first (changes the delegation)
Works as a barrier.
Does not load classes itself.
prefer-application-packages can be configured at the application level.
Can be used in scenarios where application needs to use a different version of a framework already bundled with the server (e.g. log4j, spring, xml parsers etc)

Filtering Classloader - configuration
<Application archive>.ear
META-INF
application.xml
weblogic-application.xml:
<prefer-application-packages>
<package-name>org.apache.log4j.*</package-name>
<package-name>org.aspectj.*</package-name>
<package-name>org.springframework.*</package-name>
<package-name>org.apache.commons.*</package-name>
<package-name>antlr.*</package-name>
</prefer-application-packages>

Agenda
SmartUpgrade Demo
Summary
Q&A

Now for Some Complexity…
Shared Libraries used extensively by Oracle Applications
JRF, ADF, APPLCORE, etc
Reuse Classpath definitions and jar files
Includes a version scheme
E.g. Log4J 1.0.4
Applications explicitly declare a dependency on shared libraries
Understanding Shared Libraries is critical to avoiding Class Loader related issues

Major Differences Between WLS and OC4J Shared Libraries
WLS does not offer a hierarchical deployment model
OC4J Shared Libraries run in their OWN Class Loaders
Reduced footprint
Only JARs supported
Classes in Shared Libraries resolved via search policy
WLS Shared Libraries EXPORTS the classpath to the importing application
Supports .ear, .wars and .jars
Merges Deployment Descriptors into the importing application
Scope is controlled by the scope of the reference
weblogic-application.xml vs weblogic.xml

Application shared libraries
App-lib.ear
App-1.ear
App-2.ear
my-web-1.war
my-web-3.war
my-web-2.war
my-ejb-1.jar
my-ejb-2.jar
Deployment view
Runtime view
App-1.ear
App-2.ear
my-web-1.war
my-web-2.war
my-ejb-1.jar
my-ejb-2.jar
my-web-3.war
my-web-3.war

Webapp shared libraries
webapp-1.war
WEB-INF/web.xml
WEB-INF/lib/x.jar
foo.jsp
bar.jsp
webapp-1.war
WEB-INF/web.xml*
WEB-INF/lib/x.jar
WEB-INF/lib/y.jar
foo.jsp
bar.jsp
a.jsp
b.html
WEB-INF/web.xml
WEB-INF/lib/y.jar
a.jsp
b.html
Runtime view
Deployment view
webapp-lib.war

Jar libraries
App-1.ear
my-web-1.war
library.jar
my-web-2.war
my-ejb-1.jar
Jar files and Jar libraries can be referenced from applications (EAR, WAR, JAR) via MANIFEST classpath or descriptors.

Shared library - configuration
<Application archive>.ear
META-INF
application.xml
weblogic-application.xml:
...
<library-ref>
<library-name>adf.oracle.domain</library-name>
<specification-version>11.1.1.2</specification-version>
</library-ref>
...

Agenda
SmartUpgrade Demo
Summary
Q&A

JDeveloper Upgrade Wizards forSOA, WebCenter, and ADF Application Upgrades
Oracle FMW Upgrade Tools
WebLogic SmartUpgradefor Upgrade of OC4J Java Applications and Environments to WebLogic Server
Upgrade Assistant forSOA, IDM, Forms, Reports, Discoverer, and Portal Environment Upgrades

Questions & Answers

Please don’t hesitate to contact me
or Ruxandra Radulescu for any questions
regarding migration projects
lukasz.romaszewski@oracle.com
ruxandra.radulescu@oracle.com

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Partner Webcast - Migration to Weblogic Server 11g

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