Find the word having the maximum count using a Trident topology

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How can I find the word which has the maximum count in a word count topology using Trident topology? Here's the link to the Trident word count topology.
https://github.com/nathanmarz/storm-starter/blob/master/src/jvm/storm/starter/trident/TridentWordCount.java

apache-storm trident apache-storm-topology

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asked Jan 3 at 11:02

Rahul SinghRahul Singh

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How can I find the word which has the maximum count in a word count topology using Trident topology? Here's the link to the Trident word count topology.
https://github.com/nathanmarz/storm-starter/blob/master/src/jvm/storm/starter/trident/TridentWordCount.java

apache-storm trident apache-storm-topology

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asked Jan 3 at 11:02

Rahul SinghRahul Singh

63

add a comment | 

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How can I find the word which has the maximum count in a word count topology using Trident topology? Here's the link to the Trident word count topology.
https://github.com/nathanmarz/storm-starter/blob/master/src/jvm/storm/starter/trident/TridentWordCount.java

apache-storm trident apache-storm-topology

share|improve this question

asked Jan 3 at 11:02

Rahul SinghRahul Singh

63

How can I find the word which has the maximum count in a word count topology using Trident topology? Here's the link to the Trident word count topology.
https://github.com/nathanmarz/storm-starter/blob/master/src/jvm/storm/starter/trident/TridentWordCount.java

apache-storm trident apache-storm-topology

apache-storm trident apache-storm-topology

share|improve this question

asked Jan 3 at 11:02

Rahul SinghRahul Singh

63

share|improve this question

asked Jan 3 at 11:02

Rahul SinghRahul Singh

63

share|improve this question

share|improve this question

asked Jan 3 at 11:02

Rahul SinghRahul Singh

63

asked Jan 3 at 11:02

Rahul SinghRahul Singh

63

asked Jan 3 at 11:02

Rahul SinghRahul Singh

63

63

add a comment | 

add a comment | 

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Trident API provides max & maxBy operations that return maximum value on each partition of a batch of tuples in a trident stream.

So after calculating the count of each word like below:

Stream wordCountsStream = topology.newStream("spout1", spout).parallelismHint(16).each(new Fields("sentence"),

        new Split(), new Fields("word")).groupBy(new Fields("word")).persistentAggregate(new MemoryMapState.Factory(),

        new Count(), new Fields("count")).parallelismHint(16).newValuesStream();

Use maxBy to get the word having the maximum count:

 wordCountsStream.maxBy(new Fields("count"))

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edited Mar 4 at 13:52

answered Mar 4 at 11:54

DP63DP63

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1 Answer
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1 Answer
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Trident API provides max & maxBy operations that return maximum value on each partition of a batch of tuples in a trident stream.

So after calculating the count of each word like below:

Stream wordCountsStream = topology.newStream("spout1", spout).parallelismHint(16).each(new Fields("sentence"),

        new Split(), new Fields("word")).groupBy(new Fields("word")).persistentAggregate(new MemoryMapState.Factory(),

        new Count(), new Fields("count")).parallelismHint(16).newValuesStream();

Use maxBy to get the word having the maximum count:

 wordCountsStream.maxBy(new Fields("count"))

share|improve this answer

edited Mar 4 at 13:52

answered Mar 4 at 11:54

DP63DP63

13

add a comment | 

0

Trident API provides max & maxBy operations that return maximum value on each partition of a batch of tuples in a trident stream.

So after calculating the count of each word like below:

Stream wordCountsStream = topology.newStream("spout1", spout).parallelismHint(16).each(new Fields("sentence"),

        new Split(), new Fields("word")).groupBy(new Fields("word")).persistentAggregate(new MemoryMapState.Factory(),

        new Count(), new Fields("count")).parallelismHint(16).newValuesStream();

Use maxBy to get the word having the maximum count:

 wordCountsStream.maxBy(new Fields("count"))

share|improve this answer

edited Mar 4 at 13:52

answered Mar 4 at 11:54

DP63DP63

13

add a comment | 

0

0

0

Trident API provides max & maxBy operations that return maximum value on each partition of a batch of tuples in a trident stream.

So after calculating the count of each word like below:

Stream wordCountsStream = topology.newStream("spout1", spout).parallelismHint(16).each(new Fields("sentence"),

        new Split(), new Fields("word")).groupBy(new Fields("word")).persistentAggregate(new MemoryMapState.Factory(),

        new Count(), new Fields("count")).parallelismHint(16).newValuesStream();

Use maxBy to get the word having the maximum count:

 wordCountsStream.maxBy(new Fields("count"))

share|improve this answer

edited Mar 4 at 13:52

answered Mar 4 at 11:54

DP63DP63

13

Trident API provides max & maxBy operations that return maximum value on each partition of a batch of tuples in a trident stream.

So after calculating the count of each word like below:

Stream wordCountsStream = topology.newStream("spout1", spout).parallelismHint(16).each(new Fields("sentence"),

        new Split(), new Fields("word")).groupBy(new Fields("word")).persistentAggregate(new MemoryMapState.Factory(),

        new Count(), new Fields("count")).parallelismHint(16).newValuesStream();

Use maxBy to get the word having the maximum count:

 wordCountsStream.maxBy(new Fields("count"))

share|improve this answer

edited Mar 4 at 13:52

answered Mar 4 at 11:54

DP63DP63

13

share|improve this answer

share|improve this answer

edited Mar 4 at 13:52

edited Mar 4 at 13:52

edited Mar 4 at 13:52

answered Mar 4 at 11:54

DP63DP63

13

answered Mar 4 at 11:54

DP63DP63

13

answered Mar 4 at 11:54

DP63DP63

13

13

add a comment | 

add a comment | 

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