Converter Config Reference

This is a reference for converter configuration for Amplitude's Amazon S3 Import.

convertToAmplitudeFunc

Conversion rules in convertToAmplitudeFunc determine how the ingestion service constructs events in Amplitude.

Example converter with `convertToAmplitudeFunc`

{
    "config_name": ["Event sample converter"],
    "converterConfig": {
        "fileType": "parquet",
        "compressionType": "none",
        "convertToAmplitudeFunc": {
          "event_type": "action",
          "user_id": "user",
          "device_id": "device",
          "event_properties": {
              "business_id_encid": "business_id"
          },
          "user_properties": {
              "utm_channel_category": "utm_channel_c",
              "utm_channel_source": "utm_channel_s"
          },
          "time": "epoch",
          "session_id": "session_id",
          "app_version": "app_version"
       }
    },

    "keyValidatorConfig": {
        "filterPattern": "folder1/folder2/ds=202011[1-2][0-9]/.*\\.parquet"
    }
}

Example constructed event

{
    "event_type": "watch tv",
    "user_id": "john",
    "device_id": "host1",
    "event_properties": {
        "business_id_encid": "123"
      },
      "user_properties": {
        "utm_channel_category": "discovery",
        "utm_channel_source": "network"
      },
      "time": "1645066434189",
      "session_id": "1",
      "app_version": "1"
}

Values in the event come from the fields specified by convertToAmplitudeFunc. For example, the value “watch tv” in field “event_type” comes from field “action” in ingested data files. Since event_type value isn’t ["value":"$identify"] or ["value":"$groupIdentify"], Amplitude is ingesting events in a way similar to using the HTTP V2 API.

Operators

List Operators

Using List Operators

If the source description is a list, then the first item in the list must be a string specifying the function, the rest of the list are the parameters to the function. The "|" character separates non-repeating and repeating arguments. Any arguments after "|" are repeatable arguments and can be specified any number of times. However, the entire list of argumentsmustbe present in any multiple argument operator (meaning, you can't specify just one of three arguments, you must include all three).

Operator	Description	Syntax
`path`	Evaluates each SourceDescription sequentially on the returned JsonElement. Equivalent to evaluating a specific path when chaining BasicPaths. This also works with indexing into an array, e.g. ["path", "foo", "1"] will choose the element at index 1 (second element) in the array at "foo".The index must be provided as a string.	["path", \| SOURCE_DESCRIPTION...]Example: ["path", "foo", "bar"] => obj['foo']['bar'].
`any`	Returns the first value returned by SOURCE_DESCRIPTION in the list.	["any", SOURCE_DESCRIPTION, \| SOURCE_DESCRIPTION...]
`value`	Escapes a single JSON value so you can create a static value.	Example: ["value", "amplitude-vacuum"...
`dict`	Creates a dictionary (object) where the raw_strings are keys and values are the evaluated SOURCE_DESCRIPTIONS.	["dict", "raw_string", SOURCE_DESCRIPTION, \| "raw_string", SOURCE_DESCRIPTION...]
`array`	Returns an array, where elements are the values returned by evaluating SOURCE_DESCRIPTIONS. If a SOURCE_DESCRIPTION fails to evaluate, it will be skipped	["array", SOURCE_DESCRIPTION, \| SOURCE_DESCRIPTION...]
`condition`	Determines the first true BooleanCondition and returns the result of the following SOURCE_DESCRIPTION. Throws a NoValueFoundAtSource exception if nothing evaluates to true.	["condition"\|"cond", BOOLEAN_SOURCE, SOURCE_DESCRIPTION, \| BOOLEAN_SOURCE, SOURCE_DESCRIPTION...]
`ifelse`	If the BOOLEAN_SOURCE evaluates to true, returns the first SOURCE_DESCRIPTION. Otherwise returns the second SOURCE_DESCRIPTION.	["ifelse", BOOLEAN_SOURCE, SOURCE_DESCRIPTION, SOURCE_DESCRIPTION]
`sample_md5`	Evaluates the given sampleKey (second arg) with the samplePercent (first arg) to determine whether it should be in the sample. Returns boolean	["sample_md5", SOURCE_DESCRIPTION, SOURCE_DESCRIPTION]
`iso_time_to_ms`	Assumes the string returned by SOURCE_DESCRIPTION is an ISO datetime string, e.g. `YYYY-MM-DDTHH:MM:SS`, and converts to milliseconds since epoch	["iso_time_to_ms", SOURCE_DESCRIPTION]
`ms_to_iso_time`	Assumes the string returned by SOURCE_DESCRIPTION is milliseconds since epoch and converts to ISO datetime string, e.g. `YYYY-MM-DDTHH:MM:SS`	["ms_to_iso_time", SOURCE_DESCRIPTION]
`iso_time_now`	Generates an ISO datetime string for right now	["iso_time_now"]
`ms_time_now`	Generates the milliseconds since epoch for right now	["ms_time_now"]
`int96_time_to_ms`	Assumes the string returned by SOURCE_DESCRIPTION is a base64-encoded INT96, e.g. AP6qCz41AAAwhCUA, and converts to milliseconds since epoch	["int96_time_to_ms", SOURCE_DESCRIPTION]
`parse_time_to_ms`	Takes in a RAW_STRING time format, e.g. 'M/d/yyyy H:mm:ss', and a SOURCE_DESCRIPTION that returns a string in that format, e.g. '1/1/2021 5:06:07', and converts to milliseconds since epoch	["parse_time_to_ms", RAW_STRING, SOURCE_DESCRIPTION]
`parse_json_element`	Assumes the value returned by SOURCE_DESCRIPTION is a string json blob and returns the parsed json value	["parse_json_element"\|"parse_json_object", SOURCE_DESCRIPTION]
`merge_dicts`	Merges the json objects that each SOURCE_DESCRIPTION evaluates to	["merge_dicts", SOURCE_DESCRIPTION, \| SOURCE_DESCRIPTION...]
`flatten_dict`	Flattens a nested json object into a single layer json object	["flatten_dict", "raw_string", INTEGER_SOURCE, SOURCE_DESCRIPTION]
`exclude_keys`	Evaluates the specified SourceDescription the returned JsonElement without the requested fields	["exclude_keys", SOURCE_DESCRIPTION, \| "raw_string"...]
`concat`	Treats the results of each SOURCE_DESCRIPTION as a string and returns the concatenated string	["concat", SOURCE_DESCRIPTION, \| SOURCE_DESCRIPTION...]
`replace_with`	Replace all old_string within the value returned by SOURCE_DESCRIPTION with new_string. Returns a string or raises a NoValueException if SOURCE_DESCRIPTION cannot be evaluated to a string. The old_string supports Java's regex syntax for matching patterns, more details at https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html	["replce_with", "old_string", "new_string", SOURCE_DESCRIPTION]
`split`	Splits the value returned by SOURCE_DESCRIPTION by the specified character sequence. Returns a jsonArray or raises a NoValueException if SOURCE_DESCRIPTION cannot be evaluated to a string	["split", "raw_string", SOURCE_DESCRIPTION]
`lowercase`	Returns the lowercase string	["lowercase"\|"lower", SOURCE_DESCRIPTION]
`typeof`	Returns type of the source description as a string: 'string', 'list', 'dict', 'bool', 'number', 'null'	["typeof", SOURCE_DESCRIPTION]

Boolean Operators

All of these operators return a JsonPrimitive of type Boolean, so they're valid to use with "cond" and "ifelse".

Operator	Description	Source
bool	Evaluates as a static boolean value. Throws an exception during initialization if RAW_JSON is not a boolean value.	["bool", any_json]
not	Return whether both arguments are true. Null values are treated as false, string 'true' or 'false' is cast to a boolean.	["not"\|"!", SOURCE_DESCRIPTION]
and	Return whether all arguments are true. Null values are treated as false, string 'true' or 'false' is cast to a boolean.	["and"\|"&&", SOURCE_DESCRIPTION, \| SOURCE_DESCRIPTION...]
or	Return whether at least one argument is true. Null values are treated as false, string 'true' or 'false' is cast to a boolean.	["or"\|"\|\|", SOURCE_DESCRIPTION, \| SOURCE_DESCRIPTION...]
equals	Evaluates to true iff the two args are equal.	["equals"\|"eq"\|"=", SOURCE_DESCRIPTION, SOURCE_DESCRIPTION]
contains	True if the evaluated SourceDescription (second arg) contains the given raw string. If the SourceDescription is null, evaluates to false.	["contains"\|"is_substring", "raw_string", SOURCE_DESCRIPTION]

Integer & Float Operators

The following Operators return a JsonPrimitive of type Integer, barring the “addf” Operator which returns JsonPrimitive of type Float.

Operator	Description	Syntax
int	Evaluates as a static int value. Throws an exception during initialization if RAW_JSON is not an int value.	["int", RAW_JSON]
round	Round the argument to the nearest integer. Strings are attempted to be converted to integers, and null values are treated as zero.	["round", SOURCE_DESCRIPTION]
add	Return the sum of the arguments as an integer. Strings are attempted to be converted to integers, and null values are treated as zero.	["add"\|"+", SOURCE_DESCRIPTION, \| SOURCE_DESCRIPTION...]
subtract	Subtracts the second argument from the first one. Strings are attempted to be converted to integers, and null values are treated as zero.	["subtract"\|"-", SOURCE_DESCRIPTION, SOURCE_DESCRIPTION]
multiply	Return the product of the arguments as an integer. Strings are attempted to be converted to integers, and null values are treated as zero.	["multiply"\|"*", SOURCE_DESCRIPTION, \| SOURCE_DESCRIPTION...]
`divide`	Divides the first argument by the second one. Strings are attempted to be converted to integers, and null values are treated as zero.	["divide"\|"/", SOURCE_DESCRIPTION, SOURCE_DESCRIPTION]

JSON Operator

Operator	Description	Syntax
N/A	As syntactic sugar, we convert an object to a "dict" LIST_OPERATOR	Note: the following two descriptions are equivalent: {"key1": SOURCE_DESCRIPTION,"key2", SOURCE_DESCRIPTION,…} ["dict","key1", SOURCE_DESCRIPTION,"key2", SOURCE_DESCRIPTION,...]