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https://issues.apache.org/jira/browse/STORM-1211?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15038144#comment-15038144
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ASF GitHub Bot commented on STORM-1211:
---------------------------------------
Github user satishd commented on a diff in the pull request:
https://github.com/apache/storm/pull/915#discussion_r46581840
--- Diff:
external/storm-cassandra/src/main/java/org/apache/storm/cassandra/trident/state/TridentResultSetValuesMapper.java
---
@@ -0,0 +1,63 @@
+/**
+ * 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.storm.cassandra.trident.state;
+
+import backtype.storm.tuple.Fields;
+import backtype.storm.tuple.ITuple;
+import backtype.storm.tuple.Values;
+import com.datastax.driver.core.ResultSet;
+import com.datastax.driver.core.Row;
+import com.datastax.driver.core.Session;
+import com.datastax.driver.core.Statement;
+import org.apache.storm.cassandra.query.CQLResultSetValuesMapper;
+
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.List;
+
+/**
+ *
+ */
+public class TridentResultSetValuesMapper implements
CQLResultSetValuesMapper {
+ private Fields outputDeclaredFields;
+
+ public TridentResultSetValuesMapper(Fields outputDeclaredFields) {
+ this.outputDeclaredFields = outputDeclaredFields;
+ }
+
+ @Override
+ public List<List<Values>> map(Session session, Statement statement,
ITuple tuple) {
+ List<List<Values>> list = new ArrayList<>();
+ ResultSet resultSet = session.execute(statement);
--- End diff --
Pl check the javadoc of Session which says "@return the result of the
query. That result will never be null but can be empty"
> Add trident state and query support for cassandra connector
> -----------------------------------------------------------
>
> Key: STORM-1211
> URL: https://issues.apache.org/jira/browse/STORM-1211
> Project: Apache Storm
> Issue Type: Improvement
> Reporter: Satish Duggana
> Assignee: Satish Duggana
>
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