ConnectorLib C++ 25.2
ConnectorLib C++ SDK Programming Guide

# Write Messages to the Log

All of the fetch action methods you can override in `ConnectorBase` are passed a `task` object with a `Log` object accessible with `task.log()`

           task.log().always("This message is always logged");
           task.log().critical("This is logged at the critical level");
           task.log().error("Errors are logged at this level");
           task.log().warning("Warnings are logged at this level");
           task.log().normal("This is the normal level of verbosity for logs");
           task.log().full("Verbose logging");
           task.log().writeln(42, "Logged using any numeric or defined log level");

These levels correspond to the levels you can specify for the `LogLevel` parameter in the `[Logging]` section of the connector's configuration file. Messages only appear in the connector's log files if the `LogLevel` parameter is set to the level passed to `writeln`, or a more verbose level. For more information about the `LogLevel` parameter, see LogLevel.

## Log Files

The connector writes each log message to one of its log streams. When an administrator deploys a connector, they can choose to write messages from each log stream to a separate file. For example, the administrator might choose to write messages from the synchronize log stream to `synchronize.log`, messages from the collect log stream to `collect.log`, and so on.

The log stream that the connector uses for a specific log message depends on the type of task that logged the message:

Method Overridden | Task Type | Log Stream
--- | --- | ---
synchronize | SynchronizeTask | Synchronize
synchronizeIds | SynchronizeIdsTask | Synchronize
synchronizeGroups | SynchronizeGroupsTask | SynchronizeGroups
collect | CollectTask | Collect
deleteDocs | DeleteTask | Delete
insert | InsertTask | Insert
update | UpdateTask | Update
view | ViewTask | View
hold/releasehold | HoldTask | Hold

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Version 25.2 | Last updated April 2025

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Product: Knowledge Discovery ConnectorLib C++ 25.2

Topic Title: Write Messages to the Log