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
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--- /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);
+    }
+
+}