Package storm.trident.operation.builtin

Examples of storm.trident.operation.builtin.MapGet

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                topology.newStaticState(
                    new StaticSingleKeyMapState.Factory(FOLLOWERS_DB));


        topology.newDRPCStream("reach", drpc)
                .stateQuery(urlToTweeters, new Fields("args"), new MapGet(), new Fields("tweeters"))
                .each(new Fields("tweeters"), new ExpandList(), new Fields("tweeter"))
                .shuffle()
                .stateQuery(tweetersToFollowers, new Fields("tweeter"), new MapGet(), new Fields("followers"))
                .each(new Fields("followers"), new ExpandList(), new Fields("follower"))
                .groupBy(new Fields("follower"))
                .aggregate(new One(), new Fields("one"))
                .aggregate(new Fields("one"), new Sum(), new Fields("reach"));
        return topology.build();
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        topology
                .newDRPCStream("top_hashtags")
                .stateQuery(count, new TupleCollectionGet(), new Fields("followerClass", "contentName"))
                .stateQuery(count, new Fields("followerClass", "contentName"), new MapGet(), new Fields("count"))
                .aggregate(new Fields("contentName", "count"), new FirstN.FirstNSortedAgg(5,"count", true), new Fields("contentName", "count"))
        ;

        return topology.build();
    }
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        topology
                .newDRPCStream("hashtag_count")
                .each(new Constants<String>("< 100", "< 10K", "< 100K", ">= 100K"), new Fields("followerClass"))
                .stateQuery(count, new Fields("followerClass", "args"), new MapGet(), new Fields("count"))
        ;

        return topology.build();
    }
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        topology
                .newDRPCStream("location_hashtag_count")
                .stateQuery(count, new TupleCollectionGet(), new Fields("country", "contentName"))
                .stateQuery(count, new Fields("country", "contentName"), new MapGet(), new Fields("count"))
                .groupBy(new Fields("country"))
                .aggregate(new Fields("contentName", "count"), new FirstN.FirstNSortedAgg(3,"count", true), new Fields("contentName", "count"))
        ;

        return topology.build();
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        topology
                .newDRPCStream("hashtag_count")
                .stateQuery(count, new TupleCollectionGet(), new Fields("followerClass", "contentName"))
                .stateQuery(count, new Fields("followerClass", "contentName"), new MapGet(), new Fields("count"))
                .groupBy(new Fields("followerClass"))
                .aggregate(new Fields("contentName", "count"), new FirstN.FirstNSortedAgg(1,"count", true), new Fields("contentName", "count"))
        ;

        return topology.build();
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                        .groupBy(new Fields("actor"))
                        .persistentAggregate(new MemoryMapState.Factory(), new Count(), new Fields("count"));

        topology
                .newDRPCStream("count_per_actor")
                .stateQuery(countState, new Fields("args"), new MapGet(), new Fields("count"));

        StormSubmitter.submitTopology(topologyName, conf, topology.build());

    }
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        // More usefully, you can query the state you created earlier
        topology
                .newDRPCStream("count_per_actor", drpc)
                .stateQuery(countState, new Fields("args"), new MapGet(), new Fields("count"));


        // Here is a more complex example
        topology
                .newDRPCStream("count_per_actors", drpc)
                .each(new Fields("args"), new Split(" "), new Fields("actor"))
                .groupBy(new Fields("actor"))
                .stateQuery(countState, new Fields("actor"), new MapGet(), new Fields("individual_count"))
                .each(new Fields("individual_count"), new FilterNull())
                .aggregate(new Fields("individual_count"), new Sum(), new Fields("count"));

        // For how to call DRPC calls, go back to the main method
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        // Now, let's calculate the average age of actors seen
        topology
                .newDRPCStream("age_stats", drpc)
                .stateQuery(countState, new TupleCollectionGet(), new Fields("actor", "location"))
                .stateQuery(nameToAge, new Fields("actor"), new MapGet(), new Fields("age"))
                .each(new Fields("actor","location","age"), new Print())
                .groupBy(new Fields("location"))
                .chainedAgg()
                .aggregate(new Count(), new Fields("count"))
                .aggregate(new Fields("age"), new Sum(), new Fields("sum"))
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Related Classes of storm.trident.operation.builtin.MapGet

  • backtype.storm.tuple.Values
  • com.datasalt.trident.LambdaHashTagsTopology
  • com.hmsonline.storm.cassandra.bolt.CassandraMapStateTest
  • storm.starter.trident.TridentReach
  • storm.starter.trident.TridentWordCount
  • trident.TridentReach
  • trident.TridentUpdater
  • trident.TridentWordCount
  • tutorial.storm.trident.ClusterTestTopology
  • tutorial.storm.trident.example.GlobalTop20Hashtags
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