07 WebAS Administration

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Martin Wolf

SAP Web AS Administration


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HPI, Seminar System Modeling - SS2005 / 2

Agenda

Administration of the SAP Web AS (Java)

BasicsManageable Beans (MBeans)Java Manageable Extension (JMX)

AdministrationJMX architecture in the SAP Web AS

Kernel (Set of Managers)

Pluggable Components (Interfaces, Libraries, Services)

Administration Services

Administration ToolsSAP Management Console

Config Tool

Visual Administrator

Summary

References


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Basics


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MBean

Java object that represents a manageableresource (application, service, component,device, )

Must have a management interface

ProvidesAttributes

Operations

Notifications (can be sent by the MBean)Public Constructor

Is used toGet/Set state of the resource

Execute certain operations on theresource

All administrative functions of the J2EEEngine and all the parameters watched bymonitors are provided by MBeans


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Java Manageable Extensions (JMX)

What is JMX?

Specification that defines

ArchitectureDesign-Patterns

APIs

Basic Services (application and network management, monitoring)

Separates the managed resources from the management system

Different implementations

Who is behind JMX?

Developed by many companies in the course of the Java CommunityProcess ( not proprietary)A reference implementation is made available by SUN

Other companies involved:IBM

BEA Systems

Borland

Apache Software Foundation


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Java Manageable Extensions (JMX)

Integration strategies:

JMX EnabledGiven application extended with JMX properties

E.g.: Tomcat Server, BEA Weblogic

JMX Based

Application uses JMX as framework

Configuration, administration and event handling over JMX

E.g.: JBoss Server, SAP Web AS

What can be managed by JMX?

Everything that can be implemented as an Java object

Hardware (Database, Server, )

Software (EJBs, Servlets, )


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JMX Architecture in General

Connection types:

Connector:

Provide the same interface to

the management application

as the MBean Server

Use proprietary protocols

Protocol Adaptor:

Translates the operations into

a representation in the givenprotocol

Use well-known protocols

Agent Services

Dynamic Class Loading

Timer

Relation

Monitor

MBeans

JVM

JVM JVM

Connector Server 1

(Protocol X)Protocol Adapter

MBean Server

Resource 1

(MBean)

Resource 2

(MBean)

Agent Services

R

X

R

HTTP

Connector Server 2

(Protocol Y)

R

Y

Connector

Client

(Protocol X)

JMX Manager

(Protocol Y)

Web Browser

JMX-compliant

Management

Application

Proprietary

Management

Application

Instrumentation

Level

Agent Level

Distributed

Services

Level

R R R


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Administration of the SAP Web AS


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JMX Architecture in the SAP Web AS

J2EE Engine

Dispatcher (JVM)

JVM

Connector

Client

RHTTP

Web Browser

RRMI

JMX-compliant

Management

Application

R

R

JVM

Connector Server

JMX Manager

RCORBA

Proprietary

Management

ApplicationR

R

Database

Interfaces

Libraries

Globa

lProperties

R

DMS

CentralServices

Administration

Adapter

MBeanServ

er

Agent Services

Connector Server Protocol Adapter

Object Repository

Properties

R


R

RRMI/P4

Core Services Services

Kernel

PropertiesProperties

Manager MBeans Serv ice MBeans Appl icat ion MBeans


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Kernel

Is subdivided in subsystems internally called managers

Provides basic functions concerning resource management andoperating system

Thread-pooling and - management

Sockets and Session communication

Database connection

Logon

According to their specific functions, the managers are divided in

several groups:

Class Loading SystemThread System

Cluster Management Configuration

Communication Management

Service Management


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Pluggable Components

Interfaces

Define how different components of the system work together

Defined by a name and a set of classesNo direct implementation possible service component is necessary

Libraries

Generic useable help classes (no own lifecycle)

Defined by a name, a set of classes and a set of objects (functions)Access to the functions by a factory pattern and static methods

Services

Dispose of a complex lifecycle handling and well defined interactions

Use different APIs offered by the kernel or other services

Provide runtime objects registered on the system (MBean Server)once the components classes have been loaded

Core services:

start procedure will be stopped if the initialization of such a service failed


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Administration Services

Basic Administration Service

Core service that creates MBeans for the kernel and all server

components (libraries, interfaces, services)Offers management functions to all deployed components or

extern JMX tool available

Administration Adapter Service

Offers convenience interfaces for working with the MBeansThese interfaces provide methods for cluster administration

and for viewing all registered MBeans

JMX Adapter Service

Creates the MBean Server and registers all MBeans

Provides access to it for applications, services, libraries


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Administration Tools


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SAP Management Console

GUI for the Java-Startup and Control Framework

Consists of JControl- and JLaunch-applications

Offers a central view of all components of the cluster

Provides interfaces to monitor, start and stop the wholecluster or cluster elements (dispatcher, server, )

Config Tool

Offline tool for

Adding and configuration of J2EE cluster elements

Setting global parameters

Location of the Java Home

Heap Size of the JVMHost and port of the message server

Exporting the system configuration to an XML file

Connects directly to the database (no running J2EE Enginenecessary)


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GUI administration tool (online and remote)Functions:

Obtaining general information and configuring the global

properties

Managers (timeout, command properties, )

Interfaces and libraries (name, version, JARs contained, )Services (e.g. JMX Adapter Service: timeouts, default domain)

Managing MBeans

Generic MBeans (Start/Stop, Configuration of properties, )

Specific MBeans (Runtime administration and control)

Security runtime controlPolicy management

User management


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Summary

SAP Web AS is JMX based

MBeans represents manageable resources and are centrally registered ina MBean Server

Architecture (server and dispatcher)

Kernel (Set of Managers)

Interfaces and Libraries

Services

Administration with the help of services

Basic administration service, administration adapter service, JMXAdapter Service,

Besides: extra tools for backup (online/offline possible)

SAP Web AS Administration

Online: Visual Administrator

Offline: Config Tool


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References

[1] Kessler/Tillert/Dobriko Java Programmierung mit dem

SAP Web Application Server, Gallileo Press 2005

[2] SAP AG, http://help.sap.com

[3] Orientation in Objects GmbH, http://www.oio.de/

[4] OpenKnowledge GmbH, http://www.openknowledge.de

[5] SAP Library, http://www.saphelp.com

[6] SAP Developer Network, http://www.sdn.sap.com

[7] Javamagazin, Art. Der Manager, 06/02


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Thank You

Documents

07 WebAS Administration