2 * ===============================LICENSE_START======================================
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4 * ================================================================================
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5 * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
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6 * ================================================================================
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7 * Licensed under the Apache License, Version 2.0 (the "License");
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8 * you may not use this file except in compliance with the License.
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9 * You may obtain a copy of the License at
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11 * http://www.apache.org/licenses/LICENSE-2.0
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13 * Unless required by applicable law or agreed to in writing, software
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14 * distributed under the License is distributed on an "AS IS" BASIS,
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15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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16 * See the License for the specific language governing permissions and
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17 * limitations under the License.
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18 * ============================LICENSE_END===========================================
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21 package org.openecomp.dcae.apod.analytics.common.utils;
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23 import java.util.Date;
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26 * Contains Utility methods for creating persistence row keys etc.
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28 * @author Rajiv Singla . Creation Date: 11/16/2016.
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30 public abstract class PersistenceUtils {
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34 * Name of the column which will contain Table Key
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36 public static final String TABLE_ROW_KEY_COLUMN_NAME = "key";
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39 * Delimited to be used when creating a row key with multiple fields
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41 public static final String ROW_KEY_DELIMITER = "-";
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44 private PersistenceUtils() {
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49 * Creates a decreasing number using current timestamp. Handy when you want to keep records most recent records
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50 * close to the top of column table like HBase
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52 * @return decreasing number
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54 public static String getCurrentTimeReverseSubKey() {
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55 final long timeReverseLong = Long.MAX_VALUE - new Date().getTime();
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56 return String.format("%025d", timeReverseLong);
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