com.avira.couchdoop.exp.ExportArgs.java Source code

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Here is the source code for com.avira.couchdoop.exp.ExportArgs.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 com.avira.couchdoop.exp;

import com.avira.couchdoop.ArgsException;
import com.avira.couchdoop.ArgsHelper;
import com.avira.couchdoop.CouchbaseArgs;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.Options;
import org.apache.hadoop.conf.Configuration;

import java.util.ArrayList;
import java.util.List;

/**
 * {@link com.avira.couchdoop.CouchbaseArgs} implementation which holds Couchbase export feature settings.
 */
public class ExportArgs extends CouchbaseArgs {

    private String input;

    private CouchbaseOperation operation;

    private int expiry;

    private String fieldsDelimiter;

    public static final ArgDef ARG_INPUT = new ArgDef('i', "input", true, true, "(required) HDFS input directory");
    public static final ArgDef ARG_OPERATION = new ArgDef('t', "couchbase.operation", true, false,
            "one of Couchbase store operations: SET, ADD, REPLACE, APPEND, PREPEND, DELETE, TOUCH; defaults to SET");
    public static final ArgDef ARG_EXPIRY = new ArgDef('x', "couchbase.expiry", true, false,
            "Couchbase document expiry value; defaults to 0 (doesn't expire)");
    public static final ArgDef ARG_DELIMITER_FIELDS = new ArgDef('d', "delimiter.fields", true, false,
            "Fields delimiter for the CSV input; defaults to tab");

    public static final List<ArgDef> ARGS_LIST = new ArrayList<>(4);
    static {
        ARGS_LIST.add(ARG_INPUT);
        ARGS_LIST.add(ARG_OPERATION);
        ARGS_LIST.add(ARG_EXPIRY);
        ARGS_LIST.add(ARG_DELIMITER_FIELDS);

        ARGS_LIST.addAll(CouchbaseArgs.ARGS_LIST);
    }

    public ExportArgs(Configuration conf) throws ArgsException {
        super(conf);
    }

    @Override
    public List<ArgDef> getArgsList() {
        return ExportArgs.ARGS_LIST;
    }

    @Override
    public void loadFromHadoopConfiguration(Configuration conf) throws ArgsException {
        super.loadFromHadoopConfiguration(conf);

        input = conf.get(ARG_INPUT.getPropertyName());
        operation = getOperation(conf);
        expiry = getExpiry(conf);
        fieldsDelimiter = conf.get(ARG_DELIMITER_FIELDS.getPropertyName(), "\t");
    }

    /**
     * @return HDFS input directory
     */
    public String getInput() {
        return input;
    }

    /**
     * Reads Couchbase store operation from the Hadoop configuration type.
     * @return Couchbase store operation to be used
     */
    public static CouchbaseOperation getOperation(Configuration hadoopConfiguration) throws ArgsException {
        String strCouchbaseOperation = hadoopConfiguration.get(ARG_OPERATION.getPropertyName());

        // Default value
        if (strCouchbaseOperation == null) {
            return CouchbaseOperation.SET;
        }

        try {
            return CouchbaseOperation.valueOf(strCouchbaseOperation);
        } catch (IllegalArgumentException e) {
            throw new ArgsException("Unrecognized store type '" + strCouchbaseOperation
                    + "'. Please provide one of the following: SET, ADD, REPLACE, APPEND, PREPEND and DELETE.", e);
        }
    }

    /**
     * @return Couchbase store operation to be used
     */
    public CouchbaseOperation getOperation() {
        return operation;
    }

    public static int getExpiry(Configuration hadoopConfiguration) throws ArgsException {
        String strExpiry = hadoopConfiguration.get(ARG_EXPIRY.getPropertyName());

        // Default value
        if (strExpiry == null) {
            return 0;
        }

        try {
            return Integer.parseInt(strExpiry);
        } catch (NumberFormatException e) {
            throw new ArgsException(
                    "Unrecognized expiry value '" + strExpiry + "'. Please provide a positive integer.", e);
        }
    }

    public int getExpiry() {
        return expiry;
    }

    public String getFieldsDelimiter() {
        return fieldsDelimiter;
    }
}