OpenSearch/docs/painless/painless-contexts/painless-watcher-context-ex...

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[source,console]
----
POST _watcher/watch/_execute
{
"watch" : {
"metadata" : { "high_threshold": 50000, "low_threshold": 15000 },
"trigger" : { "schedule" : { "interval" : "24h" } },
"input" : {
"search" : {
"request" : {
"indices" : [ "seats" ],
"body" : {
"query" : {
"term": { "sold": "true"}
},
"aggs" : {
"theatres" : {
"terms" : { "field" : "play" },
"aggs" : {
"money" : {
"sum": { "field" : "cost" }
}
}
}
}
}
}
}
},
"condition" : {
"script" :
"""
return ctx.payload.aggregations.theatres.buckets.stream()
.anyMatch(theatre -> theatre.money.value < ctx.metadata.low_threshold ||
theatre.money.value > ctx.metadata.high_threshold)
"""
},
"transform" : {
"script":
"""
return [
'money_makers': ctx.payload.aggregations.theatres.buckets.stream()
.filter(t -> {
return t.money.value > ctx.metadata.high_threshold
})
.map(t -> {
return ['play': t.key, 'total_value': t.money.value ]
}).collect(Collectors.toList()),
'duds' : ctx.payload.aggregations.theatres.buckets.stream()
.filter(t -> {
return t.money.value < ctx.metadata.low_threshold
})
.map(t -> {
return ['play': t.key, 'total_value': t.money.value ]
}).collect(Collectors.toList())
]
"""
},
"actions" : {
"log_money_makers" : {
"condition": {
"script" : "return ctx.payload.money_makers.size() > 0"
},
"transform": {
"script" :
"""
def formatter = NumberFormat.getCurrencyInstance();
return [
'plays_value': ctx.payload.money_makers.stream()
.map(t-> formatter.format(t.total_value) + ' for the play ' + t.play)
.collect(Collectors.joining(", "))
]
"""
},
"logging" : {
"text" : "The following plays contain the highest grossing total income: {{ctx.payload.plays_value}}"
}
},
"log_duds" : {
"condition": {
"script" : "return ctx.payload.duds.size() > 0"
},
"transform": {
"script" :
"""
def formatter = NumberFormat.getCurrencyInstance();
return [
'plays_value': ctx.payload.duds.stream()
.map(t-> formatter.format(t.total_value) + ' for the play ' + t.play)
.collect(Collectors.joining(", "))
]
"""
},
"logging" : {
"text" : "The following plays need more advertising due to their low total income: {{ctx.payload.plays_value}}"
}
}
}
}
}
----
// TEST[skip: requires setup from other pages]
The following example shows the use of metadata and transforming dates into a readable format.
[source,console]
----
POST _watcher/watch/_execute
{
"watch" : {
"metadata" : { "min_hits": 10000 },
"trigger" : { "schedule" : { "interval" : "24h" } },
"input" : {
"search" : {
"request" : {
"indices" : [ "seats" ],
"body" : {
"query" : {
"term": { "sold": "true"}
},
"aggs" : {
"theatres" : {
"terms" : { "field" : "play" },
"aggs" : {
"money" : {
"sum": { "field" : "cost" }
}
}
}
}
}
}
}
},
"condition" : {
"script" :
"""
return ctx.payload.hits.total > ctx.metadata.min_hits
"""
},
"transform" : {
"script" :
"""
def theDate = ZonedDateTime.ofInstant(ctx.execution_time.toInstant(), ctx.execution_time.getZone());
return ['human_date': DateTimeFormatter.RFC_1123_DATE_TIME.format(theDate),
'aggregations': ctx.payload.aggregations]
"""
},
"actions" : {
"my_log" : {
"logging" : {
"text" : "The watch was successfully executed on {{ctx.payload.human_date}} and contained {{ctx.payload.aggregations.theatres.buckets.size}} buckets"
}
}
}
}
}
----
// TEST[skip: requires setup from other pages]