org.apache.accumulo.server.util.ConvertConfig.java Source code

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Here is the source code for org.apache.accumulo.server.util.ConvertConfig.java

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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.accumulo.server.util;

import java.io.BufferedWriter;
import java.io.File;
import java.io.IOException;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Map;
import java.util.stream.StreamSupport;

import org.apache.accumulo.core.cli.Help;
import org.apache.accumulo.start.spi.KeywordExecutable;
import org.apache.hadoop.conf.Configuration;

import com.beust.jcommander.Parameter;
import com.google.auto.service.AutoService;

import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;

@AutoService(KeywordExecutable.class)
public class ConvertConfig implements KeywordExecutable {

    @Override
    public String keyword() {
        return "convert-config";
    }

    @Override
    public UsageGroup usageGroup() {
        return UsageGroup.OTHER;
    }

    @Override
    public String description() {
        return "Convert Accumulo configuration from XML to properties";
    }

    static class Opts extends Help {

        @Parameter(names = { "-x", "-xml", "--xml" }, description = "Path of accumulo-site.xml to convert from")
        String xmlPath = "./accumulo-site.xml";

        @Parameter(names = { "-p", "-props", "--props" }, description = "Path to create new accumulo.properties")
        String propsPath = "./accumulo.properties";
    }

    private static void writeLine(BufferedWriter w, String value) {
        try {
            w.write(value + "\n");
        } catch (IOException e) {
            throw new IllegalStateException(e);
        }
    }

    @SuppressFBWarnings(value = "PATH_TRAVERSAL_IN", justification = "code runs in same security context as user who provided input")
    @Override
    public void execute(String[] args) throws Exception {
        Opts opts = new Opts();
        opts.parseArgs("accumulo convert-config", args);

        File xmlFile = new File(opts.xmlPath);
        if (!xmlFile.exists()) {
            throw new IllegalArgumentException("xml config file does not exist at " + opts.xmlPath);
        }

        Path propsPath = Paths.get(opts.propsPath);
        if (propsPath.toFile().exists()) {
            throw new IllegalArgumentException("properties file already exists at " + opts.propsPath);
        }

        Configuration xmlConfig = new Configuration(false);
        xmlConfig.addResource(xmlFile.toURI().toURL());

        try (BufferedWriter w = Files.newBufferedWriter(propsPath, Charset.forName("UTF-8"))) {
            StreamSupport.stream(xmlConfig.spliterator(), false).sorted(Map.Entry.comparingByKey())
                    .forEach(e -> writeLine(w, e.toString()));
        }
    }

    public static void main(String[] args) throws Exception {
        new ConvertConfig().execute(args);
    }
}