EtherLogFormatter.java

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package dev.rafex.ether.logging.core.format;
 
/*-
 * #%L
 * ether-logging-core
 * %%
 * Copyright (C) 2025 - 2026 Raúl Eduardo González Argote
 * %%
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * #L%
 */
 
import java.io.PrintWriter;
import java.io.StringWriter;
import java.time.Instant;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
import java.util.logging.Formatter;
import java.util.logging.LogRecord;
 
public final class EtherLogFormatter extends Formatter {
 
    private static final DateTimeFormatter TIMESTAMP_FORMATTER = DateTimeFormatter.ISO_OFFSET_DATE_TIME
            .withZone(ZoneOffset.UTC);
 
    @Override
    public String format(final LogRecord record) {
        final var builder = new StringBuilder();
        builder.append(TIMESTAMP_FORMATTER.format(Instant.ofEpochMilli(record.getMillis()))).append(' ');
        builder.append(record.getLevel().getName()).append(' ');
        builder.append(record.getLoggerName()).append(" - ");
        builder.append(formatMessage(record)).append(System.lineSeparator());
 
        if (record.getThrown() != null) {
            final var writer = new StringWriter();
            try (var printer = new PrintWriter(writer)) {
                record.getThrown().printStackTrace(printer);
            }
            builder.append(writer);
        }
        return builder.toString();
    }
}