Github user arunmahadevan commented on a diff in the pull request:
https://github.com/apache/storm/pull/1072#discussion_r56769622
--- Diff:
examples/storm-starter/src/jvm/org/apache/storm/starter/trident/TridentWindowingInmemoryStoreTopology.java
---
@@ -0,0 +1,133 @@
+/**
+ * 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
+ * <p/>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p/>
+ * 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.starter.trident;
+
+import org.apache.storm.Config;
+import org.apache.storm.LocalCluster;
+import org.apache.storm.StormSubmitter;
+import org.apache.storm.generated.StormTopology;
+import org.apache.storm.topology.base.BaseWindowedBolt;
+import org.apache.storm.trident.Stream;
+import org.apache.storm.trident.TridentTopology;
+import org.apache.storm.trident.operation.BaseFunction;
+import org.apache.storm.trident.operation.Function;
+import org.apache.storm.trident.operation.TridentCollector;
+import org.apache.storm.trident.operation.TridentOperationContext;
+import org.apache.storm.trident.operation.builtin.Debug;
+import org.apache.storm.trident.testing.CountAsAggregator;
+import org.apache.storm.trident.testing.FixedBatchSpout;
+import org.apache.storm.trident.tuple.TridentTuple;
+import org.apache.storm.trident.windowing.InMemoryWindowsStoreFactory;
+import org.apache.storm.trident.windowing.WindowsStoreFactory;
+import org.apache.storm.trident.windowing.config.SlidingCountWindow;
+import org.apache.storm.trident.windowing.config.SlidingDurationWindow;
+import org.apache.storm.trident.windowing.config.TumblingCountWindow;
+import org.apache.storm.trident.windowing.config.TumblingDurationWindow;
+import org.apache.storm.trident.windowing.config.WindowConfig;
+import org.apache.storm.tuple.Fields;
+import org.apache.storm.tuple.Values;
+import org.apache.storm.utils.Utils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Sample application of trident windowing which uses inmemory store for
storing tuples in window.
+ */
+public class TridentWindowingInmemoryStoreTopology {
+ private static final Logger LOG =
LoggerFactory.getLogger(TridentWindowingInmemoryStoreTopology.class);
+
+ public static StormTopology buildTopology(WindowsStoreFactory
windowStore, WindowConfig windowConfig) throws Exception {
+ FixedBatchSpout spout = new FixedBatchSpout(new
Fields("sentence"), 3, new Values("the cow jumped over the moon"),
+ new Values("the man went to the store and bought some
candy"), new Values("four score and seven years ago"),
+ new Values("how many apples can you eat"), new Values("to
be or not to be the person"));
+ spout.setCycle(true);
+
+ TridentTopology topology = new TridentTopology();
+
+ Stream stream = topology.newStream("spout1",
spout).parallelismHint(16).each(new Fields("sentence"),
+ new Split(), new Fields("word"))
+ .window(windowConfig, windowStore, new Fields("word"), new
CountAsAggregator(), new Fields("count"))
+// .aggregate(new CountAsAggregator(), new Fields("count"))
+ .each(new Fields("count"), new Debug())
+ .each(new Fields("count"), new Echo(), new Fields("ct"))
+ .each(new Fields("ct"), new Debug());
+
+ return topology.build();
+ }
+
+ public static class Split extends BaseFunction {
--- End diff --
Why not reuse org.apache.storm.trident.testing.Split ?
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