Logging

VWO by default logs all ERROR level messages to your server's console. To gain more control over VWO's logging behavior, you can use the logger parameter in the init configuration.

Logger Properties

Parameter	Type	Description
level	String	Level or Type of error. Could be one of the following: DEBUG, INFO, ERROR, TRACE, WARN
prefix	String	The text that is prefixed to the error messages when logged. Defaults to 'VWO-SDK'.
transport	map[string]interface	Custom logger implementation

Example 1: Set log level to control the verbosity of logs

options := map[string]interface{}{
    "sdkKey":    "32-alpha-numeric-sdk-key",
    "accountId": "123456",
    "logger": map[string]interface{}{
        "level": "DEBUG",
    },
}

vwoInstance, err := vwo.Init(options)

Example 2: Add a custom prefix to log messages for easier identification

options := map[string]interface{}{
    "sdkKey":    "32-alpha-numeric-sdk-key",
    "accountId": "123456",
    "logger": map[string]interface{}{
        "level":  "DEBUG",
        "prefix": "CUSTOM LOG PREFIX",
    },
}

vwoInstance, err := vwo.Init(options)

Example 3: Implement custom transport to handle logs your way.
The transport parameter allows you to implement custom logging behavior by providing your own logging functions. You can define handlers for different log levels (debug, info, warn, error, trace) to process log messages according to your needs.

var loggerTransport = func(level string, message string) {
  // custom implementation here
	fmt.Printf("[%s] %s\n", level, message)
}

options := map[string]interface{}{
    "sdkKey":    "32-alpha-numeric-sdk-key",
    "accountId": "123456",
    "logger": map[string]interface{}{
        "level": "DEBUG",
        "transport": map[string]interface{}{
            "log": loggerTransport,
        },
    },
}

vwoInstance, err := vwo.Init(options)