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• encoding attribute defines the character encoding to use while publishing a message.
• handlers attribute defines that if this handler is an ASYNC handler, then this attribute
contains a comma separated list of all handlers where the message needs to be published.
10. Filter Expressions
• A filter expression is used to configure the predefined filters.
• The predefined filters are identified by literals. The following are the literals accept,
deny, not, all, any, levelChange, levels, levelRange, match, substitute,
substituteAll.
• Some of the filters are standalone filters that require attribute values. The following are
the filter expressions for standalone filters:
◦ levelChange(<new level>). For example, levelChange(INFO)
◦ levels(<level1>,<level2>....). For example, levels(INFO,WARN,DEBUG)
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