webMethods Integration Server

Integration Server:

Integration server is the core component of webMethods integration where all the programs or services hosted as packages. To define simply, IS is the component which receives requests, process and gives result back.

As i said, all the functionality is hosted on IS as services of package(s). Package is a collection of elements like folders, services, triggers and so on.  Service is a collection of flow steps accomplishes a particular task means any task can be defined as a service or services. When I say about a package or service it could be builtin or custom. Builtin are the ones you get at the time of installation of IS and custom are the ones you create. These services are runnable objects with in the server's program space. When you initialize the server, it loads the services that are contained in enabled packages into its memory.