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You can use the True filter to force a path in a
policy to return true. For example, this can be useful in cases where
you want to prevent a path from ending on a false case and consequently
throwing an exception.
The following policy parses the HTTP request, and then runs Attachment1
on the message. If Attachment1 passes, the message is echoed back
to the client by the Reflect filter. However, if Attachment1
fails, the Attachment2 filter is run on the message. Because this is an
end node, if this filter fails, an exception is thrown.
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Policy with 2 Attachment Filters
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By adding a True filter to the Attachment2 filter,
this path always ends on a true case, and so does not throw an exception if
Attachment2 fails.
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