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

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Here is the source code for org.apache.blur.shell.TermsDataCommand.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 jline.Terminal;
import jline.console.ConsoleReader;

import org.apache.blur.shell.PagingPrintWriter.FinishedException;
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.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 TermsDataCommand extends Command implements TableFirstArgCommand {
    @Override
    public void doit(PrintWriter outPw, Blur.Iface client, String[] args)
            throws CommandException, TException, BlurException {

        if (args.length < 3) {
            throw new CommandException("Invalid args: " + help());
        }

        try {
            doitInternal(outPw, client, args);
        } catch (FinishedException e) {
            if (Main.debug) {
                e.printStackTrace();
            }
        }
    }

    private void doitInternal(PrintWriter outPw, Blur.Iface client, String[] args)
            throws FinishedException, BlurException, TException {

        ConsoleReader reader = getConsoleReader();
        int totalWidth = 200;
        if (reader != null) {
            totalWidth = reader.getTerminal().getWidth() - 2;
        }

        int[] cols = new int[2];
        cols[0] = 20;
        cols[1] = totalWidth - cols[0];
        ColumnBasedPrintWriter out = new ColumnBasedPrintWriter(outPw, cols);
        if (reader != null) {
            Terminal terminal = reader.getTerminal();
            out.setLineLimit(terminal.getHeight() - 2);
        }
        CommandLine cmd = parse(args, outPw);
        if (cmd == null) {
            return;
        }

        String tablename = args[1];
        String familyPlusColumn = args[2];
        String family = null;
        String column = familyPlusColumn;
        String startWith = "";
        short size = 100;

        if (familyPlusColumn.contains(".")) {
            int index = familyPlusColumn.indexOf(".");
            family = familyPlusColumn.substring(0, index);
            column = familyPlusColumn.substring(index + 1);
        }

        if (cmd.hasOption("n")) {
            size = Short.parseShort(cmd.getOptionValue("n"));
        }

        if (cmd.hasOption("s")) {
            startWith = cmd.getOptionValue("s");
        }

        boolean checkFreq = false;
        if (cmd.hasOption("F")) {
            checkFreq = true;
        }

        while (true) {
            List<String> terms = client.terms(tablename, family, column, startWith, size);
            for (int i = 0; i < terms.size(); i++) {
                String term = terms.get(i);
                if (term.equals(startWith)) {
                    continue;
                }
                if (checkFreq) {
                    out.println(client.recordFrequency(tablename, family, column, term), term);
                } else {
                    out.println(" - ", term);
                }
                startWith = term;
            }
        }
    }

    @Override
    public String description() {
        return "Gets the terms list.";
    }

    @Override
    public String usage() {
        return "<tablename> <field> [-s <startwith>]  [-n <number>] [-F frequency]";
    }

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

    @SuppressWarnings("static-access")
    private static CommandLine parse(String[] otherArgs, Writer out) {
        Options options = new Options();
        options.addOption(OptionBuilder.withArgName("startwith").hasArg()
                .withDescription("The value to start with.").create("s"));
        options.addOption(OptionBuilder.withArgName("size").hasArg()
                .withDescription("The number of terms to return.").create("n"));
        options.addOption(OptionBuilder.withDescription("Get the frequency of each term.").create("F"));

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