FI-WARE – Future Internet Core Platform

FI-WAREApps/Services Ecosystemand delivery

July 2011

High-level Description

FI-WARE – Future Internet Core Platform

Business Framework

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FI-WARE – Future Internet Core Platform

USDL Repository and Registry

The USDL repository is a place to store service descriptions or parts of it.

The use of an USDL repository is required in order to prepare service descriptions to appear at a store, marketplace and other components of the business framework.

Existing (running) service endpoints as well as information to create an actual service instance and endpoint is registered in the USDL Registry.

Only if the service endpoint is registered it actually can be used for service composition and coordination.

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FI-WARE – Future Internet Core Platform

Marketplace and stores

Marketplaces and stores are differentiated in FI-WARE

A marketplace is a platform for many stores to place their offerings to a broader audience and consumers to search and compare services and find the store, where to buy

The final business transaction (buying) is done at the store and the whole back office process is handled by the store.

The main focus in FI-WARE will be on developing the marketplace as a generic enabler and providing open standard interfaces enabling multiple stores to place their offering

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FI-WARE – Future Internet Core Platform

Business Elements & Models Provisioning

The BE&BM Provisioning GE allow app providers to define the manner in which services and applications can be sold and delivered to the final customers

While the published USDL description represents the public view of the business model offered to the customer, the business model defines the way in which:• customers pay for application and services

• the incomes are to be split among the involved parties

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FI-WARE – Future Internet Core Platform

Revenue Settlement and Sharing

A consumer may pay each time he/she:• buys an application or service

• uses an application he/she has previously bought

The Revenue Settlement and Sharing GE supports:• Calculation of the right payment to the different application/service

providers involved, dealing with situations where the application/service for which the end-user is charged is based on the composition of application/services coming from different providers

• Sharing revenues among application/service providers and between them and the FI-WARE Instance (Business Framework) provider

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FI-WARE – Future Internet Core Platform

SLA Management

This GE deals with management of the negotiation of SLAs by the customers

The concept of SLA “templates” will be supported, enabling application providers to leave parameters open so that they can be customized when creating the contract for a given customer

Once in effect, the SLA guarantees must be monitored for violation, and any penalties paid (for this, the SLA management GE should implement interfaces to the Revenue Settlement and Sharing GE)

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FI-WARE – Future Internet Core Platform

Service Composition and Mashup

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FI-WARE – Future Internet Core Platform

Service Composition and Mashup

From the compositional perspective FI-WARE will differentiate two complementary perspectives: • front-end perspective – composed applications (or mashups)

• back-end perspective – composite (backend) services

While back-end components are created by atomizing information processing, front-end components (referred also as widgets or gadgets) are created by atomizing information presentation and user interaction.

Another difference is that the creation and execution of the front-end components will heavily depend on the available runtime environment (e.g. web-browser, device OS), and the different presentation channels they are exposed through (Facebook, Yahoo Widgets).

We expect back-end composition editors to employ a more complex composition language and environment, mashup editors being more tailored to user interface designer or even consumers

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FI-WARE – Future Internet Core Platform

Composition and mashup editors

Editors provide an environment to combine and configure applications and services in graphical way. Some common functions:• Different editors could cater for different user expertise and roles (from

composed service creators, to resellers and finally to prosumers)

• Editors should support facilities for consistency checking of interfaces and simple debugging. They should connect to the Execution Engines allow testing, debugging, installing, executing, controlling and post execution analysis of the composed applications.

• Edited/created composition and technical service descriptions should be stored/fetched in the Aggregator Repository.

• When creating compositions/mashups editors might connect to the business infrastructure:

› Marketplace to search for services

› Shops to purchase component services them for testing /deployment, and to expose composed services for purchase

› USDL Registry to browse business information related to services

Editors could be connected to a user and identity management service

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FI-WARE – Future Internet Core Platform

Mashup editors

Mashup editors enable to create applications built from discrete front-end components (e.g. gadgets/widgets, apps) and connected at the front-end layer

Functions comprised:• Creating an application front-end as a mashup built from gadgets/widgets

that rely on a series of either plain or composed backend services.

• Offering client-side inter-gadget communication facilities, including support for optional filters (wiring)

• Offering design-time semi-assisted modelling aids, such as suggestions on relevant relationships amongst gadgets and mashups (e.g. consumed data vs. produced data).

• Offering dynamic discovery facilities from the gadget/widget and mashup repository

• Generating a MDL (Mashup Description Language) model from a mashup for persistence/sharing purposes.

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FI-WARE – Future Internet Core Platform

Backend service composition editor

Deployment features in service composition editors will support the translation of composition models into executable languages such as BPEL and BPMN 2.0

Will support extensions for design-time service composition• Modelling workflow, supporting complex behavioural patterns, using

modelling elements such as gateways (exclusive, parallel, loops, etc)

• Modelling data flow, including support for complex data flow mapping, transformation and consistency check.

• Modelling of orthogonal (independent) composition work and data flow.

• Design-time semi-assisted (in opposition to manual modelling) modelling aids, such as dynamic binding, data flow generation, data flow mapping, data flow consistency, task expansion with matching composition (sub-processes), etc.

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FI-WARE – Future Internet Core Platform

Backend service composition editor

Will support extensions for design-time service composition• Creation of skeletons for composed services. The skeletons provide

placeholders for the relevant services that are going to be resolved at runtime.

• Specification of global (valid throughout the composition) and local (valid only on that template) constraints are used to decide which services can implement the skeleton at runtime.

• Several services might be suitable to implement a placeholder template. These services can have different input and output parameters and the editor needs to offer the possibility to correctly map the different dataflow types, while providing an easy to use unified interface.

• While the choice of relevant services can differ at runtime compared to design time, still for many cases the set available at runtime is a subset of the one available at design time. Thus the editor should apply smart constraint resolution also at design time to help the designer get an idea of what services might resolve at runtime, an help her prepare all the relevant inputs and outputs.

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FI-WARE – Future Internet Core Platform

Mashup Execution Engine

The FI-WARE reference architecture should offer a mashup container able to execute applications built from discrete front-end components (e.g. gadgets/widgets, apps) and connected at the front-end layer.

Functionality:• Coordinating gadget execution and communication within the mashup

• Creating the communication channels (data flow) between gadgets

• Deployment and execution of mashups

• Guaranteeing the mashup state persistence

• Generating an executable mashup

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FI-WARE – Future Internet Core Platform

Service Composition Engine

For the dynamic late-binding composition, the composition engine creates a workflow on the fly from a matching skeleton. • The process is triggered by a composition execution agent (CEA) that

receives a triggering event and requests the next step from the composition engine.

• Based on what the triggering events was, the composition engine selects the matching skeleton and creates a new session.

• Then, at each step it selects a suitable service that matches all the global and local constraints and serves it to the workflow agent to execute.

• If several services are suitable to implement a certain step one of them is chosen.

Execution results from the previous steps together with potential external events can influence the constraint-based decision process selecting the service for the new step.

If a component service fails during execution, the next compatible one might be executed instead.

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FI-WARE – Future Internet Core Platform

Mediation GEs

Providing interoperability solutions is then the main functionality of the mediation functionality.

Several GEs are considered to perform different types of mediation: • Data Mediation

• Protocol Mediation

• Process Mediation.

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FI-WARE – Future Internet Core Platform

Thank You !!