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Diffstat (limited to 'dcae-analytics-common/src/main/java/org/onap/dcae/apod/analytics/common/utils/PersistenceUtils.java')
-rw-r--r-- | dcae-analytics-common/src/main/java/org/onap/dcae/apod/analytics/common/utils/PersistenceUtils.java | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/dcae-analytics-common/src/main/java/org/onap/dcae/apod/analytics/common/utils/PersistenceUtils.java b/dcae-analytics-common/src/main/java/org/onap/dcae/apod/analytics/common/utils/PersistenceUtils.java new file mode 100644 index 0000000..3364a64 --- /dev/null +++ b/dcae-analytics-common/src/main/java/org/onap/dcae/apod/analytics/common/utils/PersistenceUtils.java @@ -0,0 +1,59 @@ +/* + * ===============================LICENSE_START====================================== + * dcae-analytics + * ================================================================================ + * Copyright © 2017 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * Licensed 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. + * ============================LICENSE_END=========================================== + */ + +package org.onap.dcae.apod.analytics.common.utils; + +import java.util.Date; + +/** + * Contains Utility methods for creating persistence row keys etc. + * + * @author Rajiv Singla . Creation Date: 11/16/2016. + */ +public abstract class PersistenceUtils { + + + /** + * Name of the column which will contain Table Key + */ + public static final String TABLE_ROW_KEY_COLUMN_NAME = "key"; + + /** + * Delimited to be used when creating a row key with multiple fields + */ + public static final String ROW_KEY_DELIMITER = "-"; + + + private PersistenceUtils() { + + } + + /** + * Creates a decreasing number using current timestamp. Handy when you want to keep records most recent records + * close to the top of column table like HBase + * + * @return decreasing number + */ + public static String getCurrentTimeReverseSubKey() { + final long timeReverseLong = Long.MAX_VALUE - new Date().getTime(); + return String.format("%025d", timeReverseLong); + } + +} |