Weblogic Server 11g R1 Overview

7/29/2019 Weblogic Server 11g R1 Overview

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Weblogic Server 11g R1 Overview

Saurabh Arora

PMTS, Weblogic SE Team


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Agenda

Essential WLS Concepts

Architecture

Clustering


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Browsers Web

Servers

Servlet

Engines

Domains - Clusters - Tiers

Object

Servers

Databases

Domain

Cluster ClusterCluster


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Domain

Unit of Management / Configuration

1 Admin Server

0 100s of managed servers

Administration Server

Central point for configuration and management

Hosts Console web application

Typically dedicated to management in production

environments (does not usually host applications) Only required to be running for configuration changes


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Cluster

Collection of multiple managed servers

Domains can have 0 or more clusters

A managed server can be standalone or a member of a single

cluster Clusters typically homogeneous but this is not strictly required

Much more detail in the clustering deep-dive session


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Deployment / Configuration Changes

Admin Server distributes application files to managed servers

Configuration contains target list indicating where an

application is deployed

Two-phase deployment / configuration architecture Similar to XA concept

All target servers receive change in prepare phase

If all vote success then activate phase commits change

Ensures changes occur everywhere or nowhere


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Node Manager

Watchdog process

Start / Stop / Monitor Servers

Java Node Manager / Scripted (SSH) Node Manager

Required for console to remotely start/stop servers or forsome HA features (server migration / singleton server)


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IDE JDeveloper Provides connector for Weblogic Server.

Oracle Eclipse Pack (Formerly Workshop IDE ) provides developer

experience

WLS supports any IDE or emacs, vi etc

Specific weblogic support by 3rd party ides

JBuilder

Intellij


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Configuration Web Console

Weblogic Console

Oracle Enterprise Manager

WLST

Jython-based scripting

Command-line tools

weblogic.appc validates application and generated containercode

General philosophy is to provide equivalent Weblogic GUI,command-line, programmatic, and scripting functionality


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Web Services

OWSM Integration.

JAX-WS 2.1

(based on glassfish)

JAX-RPC 1.1

Internal implementation.

WS-Security 1.1

WS-SecureConversation 1.3

WS-Security Policy 1.2 WS-Policy 1.5


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JDBC and JMS

JDBC Type 4 compliant.

JDBC Modules

JDBC System Modules

System level modules, deployed and managed by console.

JDBC Application Modules

Part of the application, bundled with the Enterprise

Archive.

Weblogic JMS compilant with JMS 1.1 spec.

3rd Party JMS Server is supported


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Servlets and EJB

Servlet Spec 2.5

EJB 3.0 support

JDO 2.0 Java Persistence 3.0


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Supported Platforms

Operating Systems (32 bit and 64 bit supported)

AIX

HP-UX

Linux

Solaris

Windows


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Supported Platforms

WebServers

Apache

Microsoft IIS

Oracle HTTP Server

Sun Java System Web Server

Java

JDK 6


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Supported Platforms

Databases

JDBC 4.0 compliant implementation using DataDirect v3.7.

Oracle (and Oracle Real Application Clusters)

Oracle Thin Driver

IBM DB2

Microsoft SQL Server

MySQL

Sybase


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Architecture Overview


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Architecture Overview

TransactionService

Server Kernel

Scalable IO

WL-Servlet WL-RMI

Messaging

Protocol

HTTP/S

IIOP/S

T3/S

LDAP/S

DCOM

JRMP

FTP

KernelService(Work,Tim

er,Health)

Config

uration/Diagnostics

Security

Cert

Atn

Atz

Adj

Aud

Role

Cluste

r/Replication

Namin

gService

Console

Portlet

Portlet

Portlet

WLST

ManagementA

PI(JMX/JSR88)

Application(EAR)

WAR

EJB

RAR

JMS

JDBC

Config

Custom

ServerApplication

Container

WebApp

E

JB

JCA

JD

BC

JMS

Co

nfig

Custom

W

S-*


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Fully Integrated Containers

Look and feel of a cohesive system

Containers run on a kernel that provides

Work scheduling

Timers

Logging

Diagnostics

OAM

Kernel hardened for more than 10 years

Clustering built from ground up

First class integration amongst containers e.g. JMS

and RMI


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Emphasis on modularity

Over 74 modules created out of WebLogic code

Framework available for plugging in new containers

ServerServicesManager

CoreServiceGroup

OAM

License

LDAP

Security

EJBServiceGroup

EJB

MDB

Timers

JMSServiceGroup

JMS

Bridge

SAF

Dependency


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Example Spring container integration

Admin Server

Spring Archive

Managed Server

Spring Archive

Deployment action

Console

Config

Monitoring

Server Kernel

2-Phase

deployment


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External Dependencies

WebLogic depends on a few external modules. They

include :

Open Source

Portal Lite

CSS

Custom hooks in JRockit for performance


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Work Manager

Work Manager is the thread Manager in the server

Replaces the Execute Queue from 8.1 server

Based on commonj.work api.

Tunable thread pools for runtime performance andthroughput.


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Clustering


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Clustering

What is Cluster

Group of Weblogic Server Instances working together.

Used to provide a single instance view to client.

Web

Server

Client

Client

Server

Server

Cluster


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Communication in Cluster.

IP Multicast Communication

Default

Backward compatible

One to many

Require multicast support by physical networks.

IP Unicast Communication

Easier

No multicast support required from network hardware.


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Cluster

Clustering is Supported by the following components

Web Applications

EJB and RMI Objects

JMS Destinations

JDBC Connections


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Web Application and Cluster

Clustering is used for Http Session Replication

Replications Types

In-Memory replication

JDBC based persistence

Other non-replicated approach for session

persistence

Memory (single server)

Local File system

Cookie based

Click the button to launch

the demo


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Cluster

EJB

Deploy the application on the whole cluster.

Clustering with Replica based Stubs

Stubs used by clients are contain list of all servers on the

clustered Stateful Objects (like stateful session beans ) change servers

on failover.

Stateless Objects can change servers any time.


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Cluster and JMS

Distributed Destinations

Proxy to an no of physical destinations deployed in the

domain.


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Cluster and JDBC

JDBC is a stateful protocol.

Managed server dies, rollback of transaction.

No Failover at server layer.

Click the button to launchthe demo


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Q & A

Documents

Weblogic Server 11g R1 Overview