Getting Started with Mule Cloud Connect by Ryan Carter

Author:Ryan Carter [Ryan Carter]
Language: eng
Format: epub, pdf
Tags: COMPUTERS / Web / General
ISBN: 9781449330958
Publisher: O'Reilly Media
Published: 2012-12-19T16:00:00+00:00

Summary

At first glance, the task of implementing OAuth can appear daunting, and OAuth’s token exchange system can be confusing if you’re unfamiliar with it. Fortunately, Cloud Connectors have done the groundwork for us and OAuth clients are now just a few lines of XML.

We have barely touched the full OAuth specifications or discussed things like refresh tokens. That’s the beauty of it: we don’t need to.

Chapter 4. Connection Management

As we have seen so far, Cloud Connectors abstract away most of the fuss of dealing with APIs: we haven’t needed to know whether a service provider is a REST-based service, a SOAP-based service, or some other custom protocol on top of TCP. But when service providers have more stateful protocols that require the management and sharing of connections, they may need some additional input from the end user of the connector to manage its state.

To put connection management into context, many early APIs, and some current APIs as well, support session-based authentication. In these schemes, the user typically first has to call a “login” method, which takes a username/password combination as input and returns a unique session key that represents that user’s session. The user must then include this session key in each request to the API, and then call “logout” when he is finished. Figure 4-1 illustrates a typical session-based authentication scheme.

This type of authentication maps very naturally to a website because users are accustomed to “logging in” when they start working with a particular site and “logging out” when they are done. But when it comes to web APIs, this proves more difficult because the client must keep track of state, manage concurrent sessions, worry about session timeouts, etc.

Instead, Cloud Connectors abstract away these types of processes and offer automatic connection management that will handle connecting, disconnecting, validating connections, getting a session identifier, and so on. This chapter will discuss in detail how to configure connection management features and fine tune your connectors for both performance and reliability.

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