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Questions tagged [trident]

Abstraction on top of Apache Storm for doing realtime computation.

Trident is a high-level abstraction for doing realtime computing on top of Apache Storm. It allows you to seamlessly intermix high throughput (millions of messages per second), stateful stream processing with low latency distributed querying. If you're familiar with high level batch processing tools like Pig or Cascading, the concepts of Trident will be very familiar – Trident has joins, aggregations, grouping, functions, and filters. In addition to these, Trident adds primitives for doing stateful, incremental processing on top of any database or persistence store. Trident has consistent, exactly-once semantics, so it is easy to reason about Trident topologies. (source)

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How to limit a Trident DRPC result to contain the fields of only the last function of the topology?

I've got a simple Trident Topology running in a LocalDRPC where one of the functions outputs the result field, but when I run it the results I get back seem to be all the information from every tuple, instead of just the result field as I would have…
teryret
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State in bolt/function in storm or trident

To apply some function to stream in trident storm we pass newly created instance to each method which is called on stream like this: stream.each(inputFields, new SomeFunc(), outputFields) where SomeFunc is a descendant of BaseFunc. Suppose I want…
maks
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Runing trident Timeline on parentless Component

I try to play Timeline from Trident animation library on parentless component. MyPanel mp = new MyPanel(); mp.startAnim(); //to interpolate property //wait for a while jPanel1.add(mp); The property is not interpolated until the component is placed…
maseth
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How to store Redis hash key using Trident

I am working on a real-time data project and currently using the trident-redis library at https://github.com/kstyrc/trident-redis to store sets of keys with counts. I have some more advanced breakdowns I'd like to store including a latitude and…
Alex Koshy
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Performance issues : Kafka + Storm + Trident + OpaqueTridentKafkaSpout

We are seeing some performance issues with Kafka + Storm + Trident + OpaqueTridentKafkaSpout Mentioned below are our setup details : Storm Topology : Broker broker = Broker.fromString("localhost:9092") GlobalPartitionInformation info = new…
Siddharth
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How to create serial TridentState bolts using partitionpersist in Apache Storm?

I was able to process a stream of events in batches using the partitionpersist api provided with TridentState. But now, I want to emit the processed values of this bolt and collect them as another batch of events in a following bolt.
rudd0211
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Trident kafka transactional spout

I should implement a trident transactional topology. I find out that I can use kafka as spout to make my topology transactional. I find https://github.com/nathanmarz/storm-contrib/tree/master/storm-kafka it's a kafka spout for storm but it's not…
Vladimir
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Trident: trying to fade a JLabel, getting error

[EDIT: For now, I've ended up hand-rolling my own solution with swing timers, which seems to be working OK for my needs. I'm still concerned about performance and would be willing to junk my solution in favour of Trident if anyone can suggest a…
helveticat
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Measure performance of Storm and Trident

I'm running storm and trident-storm local cluster. My goal is to compare them. I'd like to do it by comparing execution time. How can I see working time of every bolt in storm and in trident-storm?
Vladimir
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How to reference mshtml.dll in a windows phone 8 project?

Based on this article, windows phone 8 has Trident (mshtml). So, how can I add the reference to it in a WP8 project?
MaruTaru
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How to get previous state before counter update

I have for example these batches of tuples with size of batch 5 with impressions from users: Batch 1: [UUID1, clientId1] [UUID2, clientId1] [UUID2, clientId1] [UUID2, clientId1] [UUID3, clientId2] Batch 2: [UUID4, clientId1] [UUID5,…
Lukas Hajdu
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Package MemoryMapState does not exist

While compiling Storm Trident topology using maven error occurs as package MemoryMapState does not exist
sjayendra
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how to get complete list of original fields along with new Fields which has been modified in trident?

Suppose i have list of fields i.e, {field1,field2,field3,field4} I performed some operation on field2 say i want to add increment each tuple values by some value say 5, performed this operation in a function which gave me modified field with…
user2435082
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Substance lookandfeel applet issue

Whenever I hover over menu items I get a weird black space as seen in the image and I am not sure why. When I use the system look and feel I don't have this problem so I think it is because of the substance look and feel. public final class…
user2976935
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Reading material on hosting MSHTML.DLL directly (not WebBrowser)?

Can anyone suggest good reading material on hosting MSHTML.DLL/Trident directly (not SHDOCVW.DLL/WebBrowser)? I want to use it for GUI elements, sometimes major ones, in C++. I need HTML rendering, JavaScript with extra host-provided DOM methods and…
crackers
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