Github user hmcl commented on a diff in the pull request:
https://github.com/apache/storm/pull/915#discussion_r46579509
--- Diff:
external/storm-cassandra/src/test/java/org/apache/storm/cassandra/trident/TridentTopologyTest.java
---
@@ -0,0 +1,125 @@
+/**
+ * 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;
+
+import backtype.storm.LocalCluster;
+import backtype.storm.generated.StormTopology;
+import backtype.storm.tuple.Fields;
+import com.datastax.driver.core.ResultSet;
+import com.datastax.driver.core.Row;
+import com.datastax.driver.core.Session;
+import org.apache.storm.cassandra.CassandraContext;
+import org.apache.storm.cassandra.bolt.BaseTopologyTest;
+import org.apache.storm.cassandra.query.CQLStatementTupleMapper;
+import org.apache.storm.cassandra.trident.state.CassandraQuery;
+import org.apache.storm.cassandra.trident.state.CassandraState;
+import org.apache.storm.cassandra.trident.state.CassandraStateFactory;
+import org.apache.storm.cassandra.trident.state.CassandraStateUpdater;
+import
org.apache.storm.cassandra.trident.state.TridentResultSetValuesMapper;
+import org.junit.Assert;
+import org.junit.Test;
+import storm.trident.Stream;
+import storm.trident.TridentState;
+import storm.trident.TridentTopology;
+import storm.trident.operation.BaseFunction;
+import storm.trident.operation.TridentCollector;
+import storm.trident.tuple.TridentTuple;
+
+import java.util.Random;
+
+import static
org.apache.storm.cassandra.DynamicStatementBuilder.boundQuery;
+import static org.apache.storm.cassandra.DynamicStatementBuilder.field;
+import static org.apache.storm.cassandra.DynamicStatementBuilder.with;
+
+/**
+ *
+ */
+public class TridentTopologyTest extends BaseTopologyTest {
+
+ @Test
+ public void testTridentTopology() throws Exception {
+
+ Session session = cassandraCQLUnit.session;
+ String[] stationIds = {"station-1", "station-2", "station-3"};
+ for (int i = 1; i < 4; i++) {
+ ResultSet resultSet = session.execute("INSERT INTO
weather.station(id, name) VALUES(?, ?)", stationIds[i-1],
+ "Foo-Station-" + new Random().nextInt());
+ }
+
+ ResultSet rows = cassandraCQLUnit.session.execute("SELECT * FROM
weather.station");
+ for (Row row : rows) {
+ System.out.println("####### row = " + row);
+ }
+
+ WeatherBatchSpout weatherBatchSpout =
+ new WeatherBatchSpout(new Fields("weather_station_id",
"temperature", "event_time"), 3,
+ stationIds);
+
+ TridentTopology topology = new TridentTopology();
+ Stream stream = topology.newStream("cassandra-trident-stream",
weatherBatchSpout);
+
+ CassandraStateFactory insertValuesStateFactory =
getInsertTemperatureStateFactory();
+
+ CassandraStateFactory selectWeatherStationStateFactory =
getSelectWeatherStationStateFactory();
+
+ TridentState selectState =
topology.newStaticState(selectWeatherStationStateFactory);
+ stream = stream.stateQuery(selectState, new
Fields("weather_station_id"), new CassandraQuery(), new Fields("name"));
+ stream = stream.each(new Fields("name"), new PrintFunction(), new
Fields("name_x"));
+
+ stream.partitionPersist(insertValuesStateFactory, new
Fields("weather_station_id", "name", "event_time", "temperature"), new
CassandraStateUpdater(), new Fields());
+
+ StormTopology stormTopology = topology.build();
+ LocalCluster cluster = new LocalCluster();
+ cluster.submitTopology("wordCounter", getConfig(), stormTopology);
+ Thread.sleep(30 * 1000);
+
+ rows = cassandraCQLUnit.session.execute("SELECT * FROM
weather.temperature");
+ Assert.assertTrue(rows.iterator().hasNext()); // basic sanity check
+
+ cluster.killTopology("wordCounter");
+ cluster.shutdown();
+ }
+
+ public static class PrintFunction extends BaseFunction {
+
+ @Override
+ public void execute(TridentTuple tuple, TridentCollector
collector) {
+ System.out.println("####### tuple = " + tuple.getValues());
+ collector.emit(tuple.getValues());
+ }
+ }
+
+ private CassandraStateFactory getInsertTemperatureStateFactory() {
+ CassandraState.Options options = new CassandraState.Options(new
CassandraContext());
+ CQLStatementTupleMapper insertTemperatureValues = boundQuery(
+ "INSERT INTO weather.temperature(weather_station_id,
weather_station_name, event_time, temperature) VALUES(?, ?, ?, ?)")
+ .bind(with(field("weather_station_id"),
field("name").as("weather_station_name"), field("event_time").now(),
field("temperature")));
+ options.withCQLStatementTupleMapper(insertTemperatureValues);
+ return new CassandraStateFactory(options);
+ }
+
+ public CassandraStateFactory getSelectWeatherStationStateFactory() {
+ CassandraState.Options options = new CassandraState.Options(new
CassandraContext());
--- End diff --
perhaps rename to create... / build...?
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