LogLevelChangeUtil.java

/*
 * Copyright (C) 2013-2017 NTT DATA Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.terasoluna.gfw.common.logback;

import org.slf4j.LoggerFactory;

import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.joran.JoranConfigurator;

public class LogLevelChangeUtil {

    private static final String LOG_LEVEL_SYS_PROP_NAME = "ut.log.level";

    private static final String LOGBACK_FILE_PATH = "src/test/resources/logback.xml";

    /**
     * set log level system property, reload logback configuration
     */
    public static void setLogLevel(LogLevel logLevel) throws Exception {
        System.setProperty(LOG_LEVEL_SYS_PROP_NAME, logLevel.getName());
        reloadLogbackConfiguration();
    }

    /**
     * clear log level system property, reload logback configuration
     */
    public static void resetLogLevel() throws Exception {
        System.clearProperty(LOG_LEVEL_SYS_PROP_NAME);
        reloadLogbackConfiguration();
    }

    /**
     * reload logback configuration
     */
    private static void reloadLogbackConfiguration() throws Exception {
        LoggerContext context = (LoggerContext) LoggerFactory
                .getILoggerFactory();
        JoranConfigurator configurator = new JoranConfigurator();
        configurator.setContext(context);
        context.reset();
        configurator.doConfigure(LOGBACK_FILE_PATH);
    }

    /**
     * log level
     */
    public enum LogLevel {

        TRACE("trace"), DEBUG("debug"), INFO("info"), WARN("warn"), ERROR(
                "error");

        private String name;

        LogLevel(String name) {
            this.name = name;
        }

        public String getName() {
            return name;
        }

    }

}