No clear way how to integrate with FastCSV

[sleshJdev]

I need to integrate FastCSV and tinylog. I hoped it will be easy but it's turned out that event though current tinylog API seemed extensible, when I start implementing integration, I found it quite limited.

I need csv writer to be applied after Logger.info() method call. Only way I see is to implement custom writer but it doesn't work, because LogEntry expects message to be string i.e. object -> csv serialization should happen in advance.

Another way is to provide tinylog log .info() call as Writer implementation into CsvWriter, but it won't work too because of the same limitation - LogEntry expects string and Logger.info() expects string too:

CsvWriter writer = CsvWriter.builder().lineDelimiter(LineDelimiter.LF).build(new Writer() {
    @Override
    public void write(char[] cbuf, int off, int len) throws IOException {
        Logger.info(.......?????)
    }

    @Override
    public void flush() throws IOException {
        ???
    }

    @Override
    public void close() throws IOException {
        ????
    }
});

If I'll serialize to csv in advance then I won't be able to leverage Tinylog's shutdown hook/writing thread and other features:

public class TinylogEventLogger implements EventLogger {
    @Override
    public void log(Event event) {
        String csvLine = toCsvLine(event);
        logger.info(csvLine);
    }

    private String toCsvLine(Event event) {
        final Writer csv = new StringWriter();
        CsvWriter writer = CsvWriter.builder().lineDelimiter(LineDelimiter.LF).build(csv);
        writer.writeRow(toColumns(event));
        return csv.toString();
    }
}

Could you please guide me and advice possible ways of integration? I don't mind to send a patch but would be great to discuss it first to be on the same page about how to approach it.

Thanks

[pmwmedia]

What is your use case? Do you want to output all log entries in a CSV file?