logstash/logstash — pull request #424 by bfulton (2013-03-29 19:41:50+00:00)
Title: add metaevent filter

@jordansissel

Working with @jessedavis at Monitorama hackfest on this proof of concept for a metaevent filter which looks for sequences of events. You can configure like:

```
filter {
metaevent {
tags => [ "foo" ]
followed_by_tags => [ "bar" ]
add_tag => [ "baz" ]
}
}
```

Additional things we'd like to add if this looks like a good direction would be ```not_followed_by_tags``` and inlining the original events in the synthesized event. Just wanted to get feedback early.