Ingest processor context
editIngest processor context
editUse a Painless script in an ingest processor to modify documents upon insertion.
Variables
-
params
(Map
, read-only) - User-defined parameters passed in as part of the query.
-
ctx['_index']
(String
) - The name of the index.
-
ctx
(Map
) -
Contains extracted JSON in a
Map
andList
structure for the fields that are part of the document.
Side Effects
-
ctx['_index']
- Modify this to change the destination index for the current document.
-
ctx
(Map
) -
Modify the values in the
Map/List
structure to add, modify, or delete the fields of a document.
Return
- void
- No expected return value.
API
Both the standard Painless API and Specialized Ingest API are available.
Example
To run this example, first follow the steps in context examples.
The seat data contains:
-
A date in the format
YYYY-MM-DD
where the second digit of both month and day is optional. -
A time in the format HH:MM* where the second digit of both hours and minutes
is optional. The star (*) represents either the
String
AM
orPM
.
The following ingest script processes the date and time Strings
and stores the
result in a datetime
field.
String[] dateSplit = ctx.date.splitOnToken("-"); String year = dateSplit[0].trim(); String month = dateSplit[1].trim(); if (month.length() == 1) { month = "0" + month; } String day = dateSplit[2].trim(); if (day.length() == 1) { day = "0" + day; } boolean pm = ctx.time.substring(ctx.time.length() - 2).equals("PM"); String[] timeSplit = ctx.time.substring(0, ctx.time.length() - 2).splitOnToken(":"); int hours = Integer.parseInt(timeSplit[0].trim()); int minutes = Integer.parseInt(timeSplit[1].trim()); if (pm) { hours += 12; } String dts = year + "-" + month + "-" + day + "T" + (hours < 10 ? "0" + hours : "" + hours) + ":" + (minutes < 10 ? "0" + minutes : "" + minutes) + ":00+08:00"; ZonedDateTime dt = ZonedDateTime.parse( dts, DateTimeFormatter.ISO_OFFSET_DATE_TIME); ctx.datetime = dt.getLong(ChronoField.INSTANT_SECONDS)*1000L;
Uses the
|
|
Appends the string literal |
|
Appends the string literal |
|
Sets the
|
|
Uses the
|
|
If the time |
|
Builds a new time |
|
Creates a |
|
Sets the datetime field
|
Submit the following request:
PUT /_ingest/pipeline/seats { "description": "update datetime for seats", "processors": [ { "script": { "source": "String[] dateSplit = ctx.date.splitOnToken('-'); String year = dateSplit[0].trim(); String month = dateSplit[1].trim(); if (month.length() == 1) { month = '0' + month; } String day = dateSplit[2].trim(); if (day.length() == 1) { day = '0' + day; } boolean pm = ctx.time.substring(ctx.time.length() - 2).equals('PM'); String[] timeSplit = ctx.time.substring(0, ctx.time.length() - 2).splitOnToken(':'); int hours = Integer.parseInt(timeSplit[0].trim()); int minutes = Integer.parseInt(timeSplit[1].trim()); if (pm) { hours += 12; } String dts = year + '-' + month + '-' + day + 'T' + (hours < 10 ? '0' + hours : '' + hours) + ':' + (minutes < 10 ? '0' + minutes : '' + minutes) + ':00+08:00'; ZonedDateTime dt = ZonedDateTime.parse(dts, DateTimeFormatter.ISO_OFFSET_DATE_TIME); ctx.datetime = dt.getLong(ChronoField.INSTANT_SECONDS)*1000L;" } } ] }