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https://issues.apache.org/jira/browse/STORM-1914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15341567#comment-15341567
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ASF GitHub Bot commented on STORM-1914:
---------------------------------------
Github user abhishekagarwal87 commented on a diff in the pull request:
https://github.com/apache/storm/pull/1501#discussion_r67848494
--- Diff:
external/storm-kafka/src/jvm/org/apache/storm/kafka/bolt/selector/FieldIndexTopicSelector.java
---
@@ -0,0 +1,52 @@
+/**
+ * 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.kafka.bolt.selector;
+
+import org.apache.storm.tuple.Tuple;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Using field index select topic name from tuple .
+ * When the field index out of limit ,message will write to default topic.
+ */
+public class FieldIndexTopicSelector implements KafkaTopicSelector {
+ private static final Logger LOG =
LoggerFactory.getLogger(FieldNameTopicSelector.class);
+
+ private final int fieldIndex;
+ private final String defaultTopicName;
+
+ public FieldIndexTopicSelector(int fieldIndex, String
defaultTopicName) {
+ this.fieldIndex = fieldIndex;
+ this.defaultTopicName = defaultTopicName;
+ }
+
+ public FieldIndexTopicSelector(int fieldIndex) {
+ this(fieldIndex, "default");
+ }
+
+ @Override
+ public String getTopic(Tuple tuple) {
+ if (tuple.size() - 1 >= fieldIndex) {
+ return tuple.getString(fieldIndex);
+ } else {
+ LOG.warn("Field Index " + fieldIndex + " Out of bound . Use
default topic " + defaultTopicName);
--- End diff --
"Use default topic" --> "Using default topic"
> Storm Kafka Field Topic Selector
> --------------------------------
>
> Key: STORM-1914
> URL: https://issues.apache.org/jira/browse/STORM-1914
> Project: Apache Storm
> Issue Type: New Feature
> Components: storm-kafka
> Affects Versions: 1.0.0, 1.0.1, 1.0.2
> Reporter: darion yaphet
> Assignee: darion yaphet
>
> Support field name and field index to select which kafka topic will used as a
> downstream .
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