Table of Contents - Enterprise Integration Patterns 2

Table of Contents

Introduction
	Overview
	Preface
	Table of Contents	Detailed table of contents.
	Introduction
Describing Conversations
	Introduction to Describing Conversations ●●
	Choreography ●○	How can a conversation policy be described?
	Orchestration ○○	How can a participant describe what conversations it is willing to engage in?
	Hypermedia State ○○	How can a participant describe what it expects from a consumer without defining all rules of the conversation up-front?
	Conversation Vocabulary ○○
Discovery
	Introduction to Discovery ●●
	Dynamic Discovery ●●	How can a conversation initiator find a partner when it has no knowledge whatsoever about available partners?
	Advertise Availability ●○	How can a participant let others know that it is available?
	Consult Directory ●○	How can a conversation initiator find a partner across a large network without flooding the network with requests?
	Referral ●●	The choice of conversation partner may depend on the context of a conversation or may change over time. How can an initiator discover the right conversation partner?
	Leader Election ○○	How can a set of participants agree on a single participant assuming a special role?
Starting a Conversation
	Starting a Conversation ●○
	Three-Way Hand Shake ○○	How can two services sync up so they can start a conversation from the same point?
	Acquire Token First ●○	How can a provider ascertain the identity of a requestor?
	Rotate Tokens ○○
	Verify Identity ○○	How can a provider verify the claimed identity of a consumer in the absence of a certificate authority?
	User Grants Access ●○	How can a participant engage in a conversation on behalf of a user?
Basic Conversations
	Introduction to Basic Conversations ●○
	Fire-and-Forget ●●	How can one participant notify another efficiently?
	Asynchronous Request-Response ●●	How can a consumer request information from a provider?
	Request-Response with Retry ●●	How can a consumer deal with a missing response message in a Request-Response conversation?
	Polling ●●	How can a service request information from a provider if an immediate response is not available and it cannot accept unsolicited incoming messages?
	Subscribe-Notify ●●	How can one participant receive information from another participant if that information cannot easily be packaged into a single message?
	Quick Acknowledgment ●●	How can a client be sure the service accepted a request, even if processing the request takes a long time?
Intermediaries
	Intermediaries ●●
	Proxy ●●	How can a participant communicate with a partner that is not visible or not reachable?
	Relay ●●	How can participants engage in a two-way communication when each participant is limited to outbound requests?
	Load Balancer ●○	How can incoming messages be shared among the providers?
	Scatter-Gather ●○	How can a participant solicit responses from a number of participants without connecting to all of them?
Managing Distributed Systems
	System Management ○○
	Heartbeat ●○	How one know that another participant is working properly and is ready to receive messages?
Resource Management
	Introduction to Resource Management ●○
	Incremental State Build-up ●○	How can a participant invoke an operation when the it does not have all required information available at the same time?
	Lease ●●	How can a service provider avoid holding resources for clients who are no longer interested?
	Renewal Reminder ●●	How can a service provider avoid holding resources for clients who are no longer interested?
Ensuring Consistency
	Ensuring Consistency ●●
	Ignore Error ●●	How can a requestor cope with a failing request to a provider?
	Compensating Action ●●	How can a requestor ensure a consistent outcome across multiple, independent providers?
	Tentative Operation ●●	How can a requestor ensure a consistent outcome across multiple, independent providers?
	Coordinated Agreement ●●	How can agreement across multiple participants be achieved so that all participants see the same outcome?
Appendices
	Bibliography	Annotated list of references and recommended reading.