logger namespace
Functions
| Function | Description |
|---|---|
| debug(args) | Writes aDEBUG severity log. If the last argument provided is a plain object, it is added to thejsonPayload in the Cloud Logging entry. |
| error(args) | Writes anERROR severity log. If the last argument provided is a plain object, it is added to thejsonPayload in the Cloud Logging entry. |
| info(args) | Writes anINFO severity log. If the last argument provided is a plain object, it is added to thejsonPayload in the Cloud Logging entry. |
| log(args) | Writes anINFO severity log. If the last argument provided is a plain object, it is added to thejsonPayload in the Cloud Logging entry. |
| warn(args) | Writes aWARNING severity log. If the last argument provided is a plain object, it is added to thejsonPayload in the Cloud Logging entry. |
| write(entry) | Writes aLogEntry tostdout/stderr (depending on severity). |
Interfaces
| Interface | Description |
|---|---|
| LogEntry | LogEntry represents a [structured Cloud Logging](https://cloud.google.com/logging/docs/structured-logging) entry. All keys aside fromseverity andmessage are included in thejsonPayload of the logged entry. |
Variables
| Variable | Description |
|---|---|
| logger | Logger object containing all logging methods.Mockable for testing purposes. |
Type Aliases
| Type Alias | Description |
|---|---|
| LogSeverity | LogSeverity indicates the detailed severity of the log entry. See [LogSeverity](https://cloud.google.com/logging/docs/reference/v2/rest/v2/LogEntry#logseverity). |
logger.debug()
Writes aDEBUG severity log. If the last argument provided is a plain object, it is added to thejsonPayload in the Cloud Logging entry.
Signature:
exportdeclarefunctiondebug(...args:any[]):void;Parameters
| Parameter | Type | Description |
|---|---|---|
| args | any[] | Arguments, concatenated into the log message with space separators. |
Returns:
void
logger.error()
Writes anERROR severity log. If the last argument provided is a plain object, it is added to thejsonPayload in the Cloud Logging entry.
Signature:
exportdeclarefunctionerror(...args:any[]):void;Parameters
| Parameter | Type | Description |
|---|---|---|
| args | any[] | Arguments, concatenated into the log message with space separators. |
Returns:
void
logger.info()
Writes anINFO severity log. If the last argument provided is a plain object, it is added to thejsonPayload in the Cloud Logging entry.
Signature:
exportdeclarefunctioninfo(...args:any[]):void;Parameters
| Parameter | Type | Description |
|---|---|---|
| args | any[] | Arguments, concatenated into the log message with space separators. |
Returns:
void
logger.log()
Writes anINFO severity log. If the last argument provided is a plain object, it is added to thejsonPayload in the Cloud Logging entry.
Signature:
exportdeclarefunctionlog(...args:any[]):void;Parameters
| Parameter | Type | Description |
|---|---|---|
| args | any[] | Arguments, concatenated into the log message with space separators. |
Returns:
void
logger.warn()
Writes aWARNING severity log. If the last argument provided is a plain object, it is added to thejsonPayload in the Cloud Logging entry.
Signature:
exportdeclarefunctionwarn(...args:any[]):void;Parameters
| Parameter | Type | Description |
|---|---|---|
| args | any[] | Arguments, concatenated into the log message with space separators. |
Returns:
void
logger.write()
Writes aLogEntry tostdout/stderr (depending on severity).
Signature:
exportdeclarefunctionwrite(entry:LogEntry):void;Parameters
| Parameter | Type | Description |
|---|---|---|
| entry | LogEntry | TheLogEntry including severity, message, and any additional structured metadata. |
Returns:
void
logger.logger
Logger object containing all logging methods.
Mockable for testing purposes.
Signature:
logger:{write:typeofwrite;debug:typeofdebug;log:typeoflog;info:typeofinfo;warn:typeofwarn;error:typeoferror;}logger.LogSeverity
LogSeverity indicates the detailed severity of the log entry. See [LogSeverity](https://cloud.google.com/logging/docs/reference/v2/rest/v2/LogEntry#logseverity).
Signature:
exporttypeLogSeverity="DEBUG"|"INFO"|"NOTICE"|"WARNING"|"ERROR"|"CRITICAL"|"ALERT"|"EMERGENCY";Except as otherwise noted, the content of this page is licensed under theCreative Commons Attribution 4.0 License, and code samples are licensed under theApache 2.0 License. For details, see theGoogle Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-11-10 UTC.