org.apache.blur.shell.CopyTableCommand.java Source code

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Here is the source code for org.apache.blur.shell.CopyTableCommand.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.blur.shell;

import java.io.PrintWriter;
import java.io.Writer;
import java.util.List;
import java.util.Map;

import org.apache.blur.thirdparty.thrift_0_9_0.TException;
import org.apache.blur.thrift.generated.Blur;
import org.apache.blur.thrift.generated.BlurException;
import org.apache.blur.thrift.generated.ColumnDefinition;
import org.apache.blur.thrift.generated.Schema;
import org.apache.blur.thrift.generated.TableDescriptor;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.OptionBuilder;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.apache.commons.cli.PosixParser;

public class CopyTableCommand extends Command {
    @Override
    public void doit(PrintWriter out, Blur.Iface client, String[] args)
            throws CommandException, TException, BlurException {
        CommandLine cmd = CopyTableCommand.parse(args, out);
        if (cmd == null) {
            throw new CommandException(name() + " missing required arguments");
        }

        String src = cmd.getOptionValue("src");
        String dest = cmd.getOptionValue("dest");
        String location = cmd.getOptionValue("l");
        String cluster = cmd.getOptionValue("c");

        List<String> tables = client.tableList();

        if (!tables.contains(src)) {
            throw new IllegalArgumentException("Unable to find source table[" + src + "]");
        }

        List<String> clusters = client.shardClusterList();

        if (!clusters.contains(cluster)) {
            throw new IllegalArgumentException("Unknown destination cluster[" + cluster + "]");
        }

        List<String> targetTables = client.tableListByCluster(cluster);

        if (targetTables.contains(dest)) {
            throw new IllegalArgumentException(
                    "Target cluster[" + cluster + "] already contains target table[" + dest + "]");
        }

        TableDescriptor td = client.describe(src);

        td.setTableUri(location);
        td.setCluster(cluster);
        td.setName(dest);

        if (Main.debug) {
            out.println(td.toString());
            out.flush();
        }
        client.createTable(td);

        Schema schema = client.schema(src);

        for (Map<String, ColumnDefinition> column : schema.getFamilies().values()) {
            for (ColumnDefinition def : column.values()) {
                client.addColumnDefinition(dest, def);
            }
        }
    }

    @Override
    public String description() {
        return "Copy the table definitions to a new table.  Run -h for full argument list.";
    }

    @Override
    public String usage() {
        return "-src <tablename> -dest <desttable> -l <location> -c <cluster>";
    }

    @Override
    public String name() {
        return "copy";
    }

    @SuppressWarnings("static-access")
    public static CommandLine parse(String[] otherArgs, Writer out) {
        Options options = new Options();

        options.addOption(OptionBuilder.isRequired().hasArg().withArgName("tablename")
                .withDescription("* Source table name.").create("src"));

        options.addOption(OptionBuilder.isRequired().hasArg().withArgName("tablename")
                .withDescription("* Target table name.").create("dest"));

        options.addOption(OptionBuilder.isRequired().hasArg().withArgName("cluster")
                .withDescription("* Target cluster for new table.").create("c"));

        options.addOption(OptionBuilder.hasArg().isRequired().withArgName("uri")
                .withDescription("The location of the target table. (Example hdfs://namenode/blur/tables/table)")
                .create("l"));

        options.addOption(OptionBuilder.withDescription("Displays help for this command.").create("h"));

        CommandLineParser parser = new PosixParser();
        CommandLine cmd = null;
        try {
            cmd = parser.parse(options, otherArgs);
            if (cmd.hasOption("h")) {
                HelpFormatter formatter = new HelpFormatter();
                PrintWriter pw = new PrintWriter(out, true);
                formatter.printHelp(pw, HelpFormatter.DEFAULT_WIDTH, "copy", null, options,
                        HelpFormatter.DEFAULT_LEFT_PAD, HelpFormatter.DEFAULT_DESC_PAD, null, false);
                return null;
            }
        } catch (ParseException e) {
            HelpFormatter formatter = new HelpFormatter();
            PrintWriter pw = new PrintWriter(out, true);
            formatter.printHelp(pw, HelpFormatter.DEFAULT_WIDTH, "copy", null, options,
                    HelpFormatter.DEFAULT_LEFT_PAD, HelpFormatter.DEFAULT_DESC_PAD, null, false);
            return null;
        }
        return cmd;
    }
}