[[filter-plugins]]
== Filter plugins

A filter plugin performs intermediary processing on an event. Filters are often applied conditionally depending on the characteristics of the event. 

The following filter plugins are available:

<%-
full_list=[]
letters=[]
docs.each do |doc|
letter = doc[0]
letters << letter
-%>
<<plugins-filters-letters-<%= letter %>, <%=letter %>>>
<%- end -%>

<%-
cols=3
rows=(docs.count/cols)+1
item=0
r=0
-%>
[cols="asciidoc,asciidoc,asciidoc"]
|=======================================================================
<%- while r < rows do -%>
<%- c=0; while c < cols do -%>|<% if letters[item].nil? %>&nbsp; <% else %>[[plugins-filters-letters-<%=letters[item] %>]] <% end %>
<%- letter = letters[item];
arr = docs[letter]
if ! arr.nil?
arr.each do |plugin_item|
full_list << plugin_item
%>* <<plugins-filters-<%=plugin_item -%>,<%=plugin_item -%>>>
<%- end 
end -%>
<%- item+=1; c+=1; end; r+=1 end -%>
|=======================================================================

<%-
full_list.each do |plugin|
-%>
include::filters/<%=plugin %>.asciidoc[]
<%- end -%>