beantransactions top level application server for ejb anton vorsamer fujitsu-siemens computers tel:...

BeanTransactionsTop Level Application Server for

EJB

Anton VorsamerFujitsu-Siemens Computers

Tel: +49 89 636 47524Email: [email protected]

FSC EP LP TP SA / A. VorsamerSlide 2

© Fujitsu Siemens Computers 2001

Applicationserver Scenario

Applicationserver Scenario

HTTP+

XML

HTTP

external Server

Web Server

Web Client

Host Systems

ApplicationServer

DB ServerPC Client

external Server,ERP Systems



What does an Application Server ?

What does an Application Server ?

Support of asynchronous messaging services (Workflow, XML, ...)

Support of integration services(Connectivity, ... )

Integration ASIntegration AS

Central provision of services for many users(scalability, robustness, .... )

Single user programming model for the developer(state management, optimized resource management ... )

Support of standards(Java, EJB, J2EE, distributed OO concepts, ... )

Standard AS Standard AS



What is Enterprise Java Beans ?

What is Enterprise Java Beans ?

Enterprise Java Beans (EJB) is a model (framework) for server side components in a distributed multi tier architecture

EJB is a specification (API) not a product

A product that supports EJB is called an application server



Real Life Component Technology

Real Life Component Technology

Components have different functions and properties.

Core “interfaces” of the components are standardized.

Base boards provide the infrastructure for building “systems”.



EJBContainer

Transaction

Security

StateManagment

Activation/Passivation

EJB

Client

Java VM only orWeb-Server orDB-Server orCORBA-Server or

TP-Monitor

MetadataTransactionSecurityResources...

DeclarativeProgramming

EJB Component Technology

EJB Component Technology

EJBC

om

mu

nic

atio

n

Application Server



EJB Environment

EJB Environment

Without EJB= multi client view

Developers build• Threading & process control• Distributed execution control• Transactional control• State management• Resource management• Security• Interfaces• Business Logic

Developers build• Interfaces• Business Logic

EJB Framework supplies

• Threading & process control• Distributed execution control• Transactional control• State management• Resource management• Security

Using EJB= single client view



Session Beans

Session Beans

Shared by clients• Can service multiple clients• No state across methods or

transactions• Each instance identical upon

creation• Touches persistent data

• Conversational state (if necessary) managed by client

Owned by one client• Holds state for client’s

sessionacross method calls

• Assigned to one client for lifetime

• Can touch and modify persistent data

• Non-persistent• Short-lived (client, timeout,

server crash)

Stateful Stateless



Entity Bean Persistence

Entity Bean Persistence

Developer writes persistency code

DeveloperDetermines data to persistInitializes dataWrites data mappingWrites data access coding

ContainerSynchronizes stateManages pool of beansManages lifecycle

Developer focuses on data use only

DeveloperSpecifies data to persistInitializes attributes

ContainerGenerates data access codingMaps dataSynchronizes stateManages pool of beansManages lifecycle

BeanManaged

ContainerManaged



openUTM OLTP Server

openUTM OLTP Server

OSI-TP LU6.1 LU6.2 TCP/IP IIOP

Interoperability openUTM IBM CICS, IMS/DC, MQSeries OSI-TP Applications TCP/IP Applications SAP R/3 ...

C, C++

Web-Client

Standard Web Browser

Standard Web Server

SuiteSpot

Windows PC

UNIXWorkstation

Application

Terminal

Communications

Acc

es

s C

on

tro

l /

Tra

nsa

cti

on

al

Se

cu

rity

Application Server

Cobol

DBMSJAVA Client

BS2000OSD

UNIX

WindowsNT



Proven, robust, scalable application server ( multi-tier architecture ) Synchronous communication (Request/Reply, Conversations) Reliable asynchronous communication (Message Queueing) Support of distributed transactions in heterogeneous environments

XA Interface to Resource Managers (RDBMS, Reliable MQ Systems) X/Open DTP Protocol OSI-TP

Transactional interoperability with Legacy Applications Protocols for Connectivity: TCP/IP, SNA LU6.1, LU6.2

Rich Client Support Transactional and non transactional Clients JAVA Client, VB Client, Integration with MS Office

OO-based Component-Technology, platform independent for C/S & Web Container for easy to implement and to deploy Business Components JAVA Technology

Key Features of a High End Applicationserver

Key Features of a High End Applicationserver

==> Enterprise JavaBeans including JTA, JDBC, JNDI, JMS



BeanTA Application Server

BeanTA Application Server



C, C++

Web-Client


Standard Web Server

SuiteSpot

Windows PC

UNIXWorkstation

Application

Terminal

Communications

Acc

es

s C

on

tro

l /

Tra

nsa

cti

on

al

Se

cu

rity

Application Server

Cobol

DBMS

JAVA Client

BS2000OSD

UNIX

WindowsNT



openUTM and BeanTransactions

openUTM and BeanTransactions



C, C++

Web-Client


Standard Web Server

SuiteSpot

Windows PC

UNIXWorkstation

Application

Terminal

Communications

Acc

es

s C

on

tro

l /

Tra

nsa

cti

on

al

Se

cu

rity

Application Server

EnterpriseJavaBeansComponent

BS2000OSD

UNIX

WindowsNT

Cobol

DBMS

JAVA Client



BeanTransactions V2.0

BeanTransactions V2.0

Support of Recoverable Session Beans

State of Recoverable Session Beans is transactional - consistent state after rollback - recovery of state after server crash

Transactional Integration of Legacy Applications (openUTM, CICS, IMS)

Support of Entity Beans (Database Mapping)Persistency Framework MPF/J

PlatformsWindows NT/2000, Unix, BS2000

Integration of BeanTA specific Tools in Developmenttools (e.g. Borland JBuilder)

Graphical Administration Tools



BeanTransactions(Core Functionality)

BeanTransactions(Core Functionality)

State Managment = Recoverable Session Beans

Connectivity = Legacy Integration

Persistency = Database Mapping

Transactions

Security

Resource Pooling

....



JVMJVM

client contexts

UTM shared memory

Request Queue

UTM server processes

BeanTransactions(State Management)




JVMJVM

client contexts

serialized EJB

serialization/deserializationUTM shared memory

Ouput Queue




client contexts

transactionalfile



JVMJVM

transactionalfile

serialized EJBs

serialization/deserializationUTM shared memory

Request Queue






Recoverable Session Bean

Recoverable Session Bean

Normal (first) Access:

...home = lookup(“.....”);session = home.create(...);

Access for Recovery: ...home = lookup(“.....”);Enumeration sessions = (UtmEjbSessionHome)home.findAll();session = sessions. nextElement();



BeanTransactions(Connectivity)

BeanTransactions(Connectivity)

ApplicationServer

FSC / BS2000

IBM / MVS

other e.g..Unisys over OSI-TP



openUTM-Applicationserver

Transaction Synchronisation / Commmunication

Acc

ess

Co

ntr

ol EJBComponentEJB

ComponentEJBComponentEJB

Component

EJB Container

BeanTransactions(EJB Integration Application Server)

BeanTransactions(EJB Integration Application Server)

Connectors

LU6 & OSI-TPsynchronous andasynchronous Messaging

CICS / IMS

OLTPService

openUTM

OLTPService

OSI-TP System

OLTPServiceTransactions



// Business Methodspublic class openUTMBean implements SessionBean{ private openUTMConnectivity utm; private openUTMConnectivitySource utmserver;

// EJB Methods public void ejbCreate() { naming = new InitialContext(); utmserver = naming.lookup(" java:comp/env/legacy/myUTM"); utm = utmserver.getConnectivity(); }

// Business Methods public String callUTM( String input ) { return utm.Call(input); } }

Connector Beans

Connector Beans



BeanTransactions(Persistency)

BeanTransactions(Persistency)

Acc

ess

Co

ntr

ol

Applicationserver

JavaClient

EJBComponent

EJBNaming

JDBC

XA

JNDI

Transaction Synchronisation / Commmunication

EJB Container

MPF/

J

Clear separation of application server core and persistency manager



public class AccountBean implements EntityBean{ public int acctnr; // persistent field public float balance; // persistent field public String cust; // persistent field // EJB Methods..... // Business Methods public void deposit( float amount ) { balance = balance + amount; } public float getBalance() { return (balance); }}

Container Managed Entity Bean

Container Managed Entity Bean



J2EE ArchitectureJ2EE Architecture

JMS

EJBContainer

EJB

EJB

WebContainer :

HTML/XML

Servlets+

JSPs

EnterpriseInformationSystems :

Legacy Applications

ERP Systems

Client

Client

Client

Client

Client

Client Tier Middle Tier EIS Tier

Relational Databases

JDBC

MD

BConnectors

new



BeanTransactions

BeanTransactions

EJB Specification V2.0

Messaging Support (JMS, Message Driven Beans)

Connector Support

BeanTransactions = EJB V2.0+

Asynchronous transactional bidirectional Messaging

to Legacy Applications based on JMS (openUTM, CICS, IMS)

Synchronous transactional bidirectional Messaging to

Legacy Applications (openUTM, CICS, IMS)



J2EE Architecture & BeanTransactionsJ2EE Architecture & BeanTransactions

JMS

EJBContainer

EJB

EJB

WebContainer :

HTML/XML

Servlets+

JSPs

EnterpriseInformationSystems :

Legacy Applications

ERP Systems

Client

Client

Client

Client

Client

Client Tier Middle Tier EIS Tier

openUTM MQ

JDBCRelational Databases

ConnectorsM

DB

Connectors



From the Application Server to the Integration Platform ...

From the Application Server to the Integration Platform ...

An Integration Platform has to to create a business workflow from business services

i.e. macro services from micro servicesi.e. business process objects from business objects

should work declarative, rules bases without the need of programming

must allow integration of heterogeneous technology (JAVA, COM, XML ...)

macro service in Sun ONE = business process object in openSEASEJB = micro service in Sun ONE = business object in openSEAS

openSEASbest in class

implementation of these requirements



WebTransactions

openSEAS Integration Architecture

openSEAS Integration Architecture

HeterogeneousClients

Standard-Appl,e.g. R/3

Standard-Appl,e.g. R/3

BS2000/OSDopenUTM, OS/390,...Appl.


Business Object in Standard Technology

Business Process Objectsin Standard Technology

BOBO BPOBPO

Windows NT/2000 UNIXWindows NT/2000 UNIX



CC Connectorin EJB Technology

BizTransactions

BPOBPO

BPOBPO

AdapterAdapter

BOBO

AdapterAdapter

BOBO

FutureTechnologiesXML ....

FutureTechnologiesXML ....

BOBO

BeanTransactionsEJB container

EJBComponent

EJBComponent

CC CCCC

BOBO

BOBO BOBO

CC



State of the Art TechnologyState of the Art TechnologyState of the Art TechnologyState of the Art Technology

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