MEDIATOR Vs BPEL Vs OSB

Differences

MEDIATOR/ESB	BPEL	OSB
Routing & mediation	Process Orchestration	Service virtualization
Used with SOA suite	Used with SOA Suite	Can be independently used without SOA suite
Development through jdeveloper IDE	Development through jdeveloper IDE	Development through Eclipse IDE or Web console
Stateless Messaging	Primarily for stateful and long running processes	Stateless messaging.It can b synchronous/asynchronous.
Intra-composite mediation to connect components within a given composite		Inter-composite mediation, that is to say that it connects different composites together and while doing that it even does service virtualization, protocol translation, service pooling,message throttling
Not present	Instance Monitoring present	Not present
Value Mapping and cross reference tables for supporting canonical datamodels	Integration of Rules Engine and Human Workflow	Value Mapping and cross reference tables for supporting canonical datamodels
Implementation of VETRO pattern ->Validate ->Enrich ->Transform ->Route ->Operate	Implementation of composite services	Includes VETRO pattern apart from extended functionality for enterprise-wide integration like ->Message throttling ->Service Pooling ->Reliable Messaging ->Split-Join
Message Transformation with XSLT	Message Transformation with XSLT	Message Transformation over Xquery and with XSLT
Can be used and deployed as a SCA component	Can be used and deployed as a SCA component	OSB specific deployment. Not yet integrated with SCA

SIMILARITIES

1.All of them provide XA Support

2.Message Filter and Message Validation

3.Asynchronous Messaging

4.Message Transformation using XSLT

5.Have Adapter framework

6.Message Routing