001/*
002 * (C) Copyright 2017-2018 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     bdelbosc
018 */
019package org.nuxeo.elasticsearch.core;
020
021import org.apache.commons.lang3.StringUtils;
022import org.nuxeo.elasticsearch.api.IndexNameGenerator;
023
024/**
025 * @since 9.3
026 */
027public class IncrementalIndexNameGenerator implements IndexNameGenerator {
028    protected static final String SEP = "-";
029
030    @Override
031    public String getNextIndexName(String aliasName, String oldIndexName) {
032        if (StringUtils.isEmpty(oldIndexName)) {
033            return aliasName + SEP + "0000";
034        }
035        int i = oldIndexName.lastIndexOf(SEP);
036        if (i < 0) {
037            throw new IllegalArgumentException("Invalid index name: " + oldIndexName);
038        }
039        int index = Integer.parseInt(oldIndexName.substring(i + 1)) + 1;
040        return String.format("%s%s%04d", aliasName, SEP, index);
041    }
042}