Github user gvramana commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/972#discussion_r119370617
--- Diff:
core/src/main/java/org/apache/carbondata/core/util/SessionParams.java ---
@@ -0,0 +1,148 @@
+/*
+ * 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 org.apache.carbondata.core.util;
+
+import java.io.Serializable;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.carbondata.common.logging.LogService;
+import org.apache.carbondata.common.logging.LogServiceFactory;
+import org.apache.carbondata.core.cache.CacheProvider;
+import org.apache.carbondata.core.exception.InvalidConfigurationException;
+import static org.apache.carbondata.core.constants.CarbonCommonConstants.*;
+
+import org.apache.commons.lang.StringUtils;
+
+
+/**
+ * This class maintains carbon session params
+ */
+public class SessionParams implements Serializable {
+
+ private static final LogService LOGGER =
+ LogServiceFactory.getLogService(CacheProvider.class.getName());
+
+ private Map<String, String> sProps;
+
+ public SessionParams() {
+ sProps = new HashMap<>();
+ }
+
+ /**
+ * This method will be used to get the properties value
+ *
+ * @param key
+ * @return properties value
+ */
+ public String getProperty(String key) {
+ return sProps.get(key);
+ }
+
+ /**
+ * This method will be used to add a new property
+ *
+ * @param key
+ * @return properties value
+ */
+ public SessionParams addProperty(String key, String value) throws
InvalidConfigurationException {
+ boolean isValidConf = validateKeyValue(key, value);
+ if (isValidConf) {
+ LOGGER.audit("The key " + key + " with value " + value + " added in
the session param");
+ sProps.put(key, value);
+ }
+ return this;
+ }
+
+ private boolean validateKeyValue(String key, String value) throws
InvalidConfigurationException {
+ boolean isValid;
+ switch (key) {
+ case ENABLE_DATA_LOADING_STATISTICS:
+ case ENABLE_UNSAFE_SORT:
+ case ENABLE_OFFHEAP_SORT:
+ case ENABLE_INMEMORY_MERGE_SORT:
+ case ENABLE_UNSAFE_IN_QUERY_EXECUTION:
+ case USE_OFFHEAP_IN_QUERY_PROCSSING:
+ case CARBON_CUSTOM_BLOCK_DISTRIBUTION:
+ isValid = validateBoolean(value);
+ if (!isValid) {
+ handleFailure(key, value);
+ }
+ break;
+ default:
+ isValid = false;
+ throw new InvalidConfigurationException(
+ "The key " + key + " not supported for dynamic
configuration.");
+ }
+ return isValid;
+ }
+
+ /**
+ * the method does the range validation if the min or max value is
passed.
+ *
+ * @param value
+ * @param minValue
+ * @param maxValue
+ * @return
+ */
+ private boolean validateIntRange(String value, String minValue, String
maxValue) {
--- End diff --
Reuse this functions, may be move to validate util, currently being used
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