Logging layer

Add log for every operation.

Logging

• OpenDAL will log in structural way.
• Every operation will start with a started log entry.
• Every operation will finish with the following status:
  • succeeded: the operation is successful, but might have more to take.
  • finished: the whole operation is finished.
  • failed: the operation returns an unexpected error.
• The default log level while expected error happened is Warn.
• The default log level while unexpected failure happened is Error.

Examples

const op = new Operator("fs", { root: "/tmp" })

const logging = new LoggingLayer();
op.layer(logging.build());
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Output

To enable logging output, set the RUST_LOG environment variable:

RUST_LOG=debug node app.js
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