Middleware

Middleware is software that allows otherwise separate software components or applications to share data. Product categories include: message-oriented (MOM) middleware, transaction processing (TP) middleware, remote procedure call (RPC) middleware, object request broker (ORB) middleware, structured query language (SQL) data access, application servers, and enterprise service bus (ESB) middleware. MOM middleware is asynchronous, requires user action, and provides program-to-program data exchanges. TP middleware provides organizations with the tools and environment for developing and deploying distributed applications. RPC middleware can be synchronous or asynchronous and is designed to distribute application logic across a network. ORB middleware allows applications to send objects and request services across an object-oriented system. SQL-oriented data access middleware is used to connect software applications and database servers. By contrast, application servers are installed on industrial computers to facilitate the use of other applications. ESB middleware is a software architecture that uses a standards-based messaging engine or bus to provide foundational services for more complex architectures.

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