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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.kylin.tool;

import java.io.File;
import java.util.Locale;

import org.apache.commons.io.FileUtils;
import org.apache.kylin.tool.util.ToolUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class JStackTool {
    private static final Logger logger = LoggerFactory.getLogger("diag");

    private JStackTool() {
    }

    public static void extractJstack(File exportDir) {
        File logDir = new File(exportDir, "logs");

        try {
            FileUtils.forceMkdir(logDir);
            File jstackDumpFile = new File(logDir,
                    String.format(Locale.ROOT, "jstack.diag.log.%s", System.currentTimeMillis()));
            ToolUtil.dumpKylinJStack(jstackDumpFile);
        } catch (Exception e) {
            logger.error("Failed to dump jstack, ", e);
        }
    }
}