com.clickhouse.logging.LoggerFactory Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of clickhouse-data Show documentation

Data processing utilities for ClickHouse

There is a newer version: 0.7.1-patch1

package com.clickhouse.logging;

import java.util.ServiceLoader;

/**
 * Unified factory class to get logger.
 */
public abstract class LoggerFactory {
    private static final LoggerFactory instance;

    static {
        LoggerFactory factory = null;
        for (LoggerFactory f : ServiceLoader.load(LoggerFactory.class, LoggerFactory.class.getClassLoader())) {
            if (f != null) {
                factory = f;
                break;
            }
        }

        if (factory == null) {
            try {
                if (org.slf4j.LoggerFactory.getILoggerFactory() != null) {
                    factory = new Slf4jLoggerFactory(); // NOSONAR
                }
            } catch (Throwable ignore) { // NOSONAR
                factory = new JdkLoggerFactory(); // NOSONAR
            }
        }

        if (factory == null) {
            throw new IllegalArgumentException("No LoggerFactory found");
        }
        instance = factory;
    }

    /**
     * Gets logger for the given class. Same as {@code getInstance().get(clazz)}.
     *
     * @param clazz class
     * @return logger for the given class
     */
    public static Logger getLogger(Class clazz) {
        return instance.get(clazz);
    }

    /**
     * Gets logger for the given name. Same as {@code getInstance().get(name)}.
     *
     * @param name name
     * @return logger for the given name
     */
    public static Logger getLogger(String name) {
        return instance.get(name);
    }

    /**
     * Gets instance of the factory for creating logger.
     *
     * @return factory for creating logger
     */
    public static LoggerFactory getInstance() {
        return instance;
    }

    /**
     * Gets logger for the given class.
     *
     * @param clazz class
     * @return logger for the given class
     */
    public Logger get(Class clazz) {
        if (clazz == null) {
            throw new IllegalArgumentException("Non-null class required");
        }
        return get(clazz.getName());
    }

    /**
     * Gets logger for the given name.
     *
     * @param name name
     * @return logger for the given name
     */
    public abstract Logger get(String name);
}