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# Adapters Guide

Adapters are programs that convert data to and from the StreamBase tuple protocol. You can use adapters to:

- Convert data from real-time sources such as financial market data feeds.

- Convert data from an external resource such as a CSV file.

- Convert processed StreamBase tuples into the format used by an external resource, such as an XML file.

StreamBase provides two categories of adapters:

Embedded Adapters

  Embedded adapters are those that run in the same TIBCO StreamBase® Server process that is hosting and processing your EventFlow fragment, and do not incur any client-server communication overhead. Embedded adapters start and stop automatically with the node that hosts your EventFlow fragment.

External Adapters

  External adapters are those that run in independent processes separate from the StreamBase Server process, and possibly on separate hosts. External adapters are provided in separate installation kits. See External Adapters for the available external adapters.

TIBCO StreamBase adapters are considered as either Standard or Premium adapters. Standard adapters are licensed as part of your TIBCO StreamBase license, while Premium adapters require separate licensing. This subject is discussed on the License Considerations page.

If you need functionality not provided by an existing StreamBase adapter, you can implement your own custom embedded adapter using the StreamBase Java Client library. See Creating Custom Java Embedded Adapters for more information.