Mule filters
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The document discusses Mule filters and filter types. It describes that filters determine if a message can proceed through an application flow by implementing basic logic operators or more complex conditions. Common filter types include payload, regex, exception, and, or, not filters. The and, or, and not filters can be combined to express complex logic. Custom filters can also be defined.
Mule filters
- 1. Mule Integration Workshop Mule Filters
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- 4. FILTERS Mule bundles more than a dozen Filters that determine whether a message can proceed through an application flow. The simplest filters implement basic logic operators (such as and, or, and not), but these simple elements can be combined in various ways to specify complex logical conditions. Filters provide the logic by which to invoke a particular router. Filters can be combined using the logic filters, AndFilter, OrFilter and NotFilter. E.g. PayloadType Filter, RegEx Filter, WildCard Filter, XPath Filter etc.
- 5. FILTER TYPES Custom Filter custom filter to specify a precise set of conditions a message must satisfy before it can continue through the flow. Bundled Filters Filters Description And/Not/Or The three And/Not/Or logic filters express simple logic. When required to express complex logic, these three filters can be used in combination with other filters. Custom References a user-implemented filter class. Exception Filters against an exception of a specified type. Expression Filters against a range of expressions. Filter Ref References a globally-defined filter. Idempotent Message This filter ensures that a flow receives only unique messages. Message Applies specified criteria to a message to determine whether it should be processed. Message Property Evaluates message properties to determine whether that message should be processed. Payload Evaluates the payload type of a message to determine whether it should be processed. Regex Applies a regular expression pattern to the message payload to determine whether it should be processed. Schema Validation Uses the JAXP libraries, to validate a message against a schema. Wildcard Filter Matches string messages against a wildcard pattern.
- 6. FILTER TYPES Payload Type Filter: Checks the class type of the payload object inside a message. RegEx Filter: Applies a regular expression pattern to the message payload. Exception Type Filter A filter that matches an exception type.
- 7. FILTER TYPES And Filter An And filter combines two filters and only accepts the message if it matches the criteria of both filters. Or Filter The Or filter considers two filters and accepts the message if it matches the criteria of either one of the filters.
- 8. FILTER TYPES Not Filter: A Not filter accepts the message if it does not match the criteria in the filter. Expression filter: This can be used in content-based routing to assert statements on the current message and route the message accordingly.
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