Evolving Broadcast Operations With ESB Chris Contakes, Vice President IT, PBS Sylvain Nazef, Sr. Enterprise Architect, PBS Bryan Boggio, Sr. Director, Media Systems, PBS Joy Wang, Director Software Development, PBS Murali Rajendran, Sr. Software Developer, PBS
Agenda What is ESB? Why implement ESB in your infrastructure? High level overview of BPM ESB Pilot at PBS Open discussion
What is ESB? ESB = Enterprise Service Bus Software architecture model used for designing and implementing communication between mutually interacting software applications in a service-oriented-architecture (SOA). Enables integration of different applications and systems via messaging in a bus like architecture.
What is ESB? Promotes agility and flexibility by decoupling systems and allowing them to communicate without direct dependency or knowledge of other systems on the bus. The ESB is implemented in software that operates between the business applications. This software is the bus.
Why ESB? Removes point-to-point connections. Decoupling of services. System integration via standard APIs. Event monitoring. Capture technical metrics about processes. Capture and surface business metrics (KPIs).
Basic ESB Architecture
ESB Features Message Routing Routes messages according to Policies and/or Business Rules. Message Transformation Can convert messages from/to various formats, such as XML and JSON. Message Enhancement Provides ability to augment the content of a message with data from other sources (database, webservice API, etc ). Message Processing Provides state management for requests, sync/async messaging, publish/subscribe, etc Protocol Transformation Ability to communicate between multiple system using different protocols (HTTP, TCP Socket, etc ). Service Orchestration Provides the ability to create higher-level services by combining and orchestrating other services. Transaction Management Provides transaction support for processes that span across multiple services. Security Provides fine grained authentication and authorization at the service level but also at the message level.
What about the end user? ESB focuses on lower level system integration and orchestration BPM implemented for higher level user interactions (business processes) Example: An error condition is detected by ESB requiring a user decision or action before proceeding to the next step of a workflow.
What is BPM? BPM = Business Process Management BPM complements ESB It provides a user interface allowing human interactions with the ESB system. The ESB also has the ability to initiate human processes when needed. Process Modeling Non-technical people can graphically design/maintain processes, using BPMN language. Process State Management State of a process is maintained by BPM, along with audit data used for statistical reporting. SLA and Escalations BPM provides ability to monitor processes and send alerts, re-assign or terminate tasks, based on business rules.
ESB Pilot at PBS PBS has embarked on an ESB implementation to: Simplify complicated architecture. Provide layer of abstraction around broadcasts systems. Provide an architecture that will scale and evolve with the business. Have a better understanding of throughput and capacity of systems.
ESB Pilot at PBS Team chose a well understood and well defined existing workflow AS03-File Transfer Pilot workflow utilizes many of the building blocks for other systems (Real Time, DDMS, etc.): QC Solution Program Schedule Media Storage Solution Accelerated File Transfer Solution
ESB Pilot at PBS
ESB Pilot at PBS *FIMS = Framework for Interoperable Media Services
Thank You! Discussion / Questions crcontakes@pbs.org