Drools Fusion and Twitter Storm
by karlunho
Hi Folks,
I'd like to hear about any stories of using Drools in combination with
Twitter's Storm <http://storm-project.net/> .
The problem that I'm trying to solve is making a highly scalable event
processing system with the following properties:
1. Lots of events for the same timeframe - that means if the events expire
within 30 minutes, there are too many events to compute in a 30 minute
period for a single node
2. Fault tolerant - Meaning that if a node goes down, event processing will
not be affected or data will not be lost.
3. Perform Aggregates across large number of events
Has anyone tried to integrate the two systems ? There are a couple of
thoughts that I have why the two would be a nice match:
1. Twitter Storm seems to take care of most of the distributed processing
problem. Specifically, it allows for generating partial aggregate on
multiple nodes, followed by creating complete aggregates across nodes. Kind
of like a streaming map-reduce system.
2. Drools seems to have better a better language for event processing -
especially when there are layers and layers of business rules.
3. Drools Guvnor allows on-the-fly modification of rules - this is a huge
limitation of Twitter storm because it does not allow on-the-fly
modification of event processing topologies.
Let me know what everyone thinks (or if anyone has implemented this) !
The system I'm planning to apply this to is a mobile analytics system where
we are collecting network traffic and log data across potentially millions
of smartphones in real-time.
Regards,
Alan Ho
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13 years
Re: [rules-users] debug
by Kevin Kelleher
Hi All,
I'm wondering what the status is re this "debug not working" drools issue.
It's been out there for quite a while now. It would be great to get feedback
re this.
Folks out there must be using 5.5.0 core, so I'm wondering how they are
coping this issue.
Regards,
Kevin
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13 years
Planner: How to Set Global Varaiables
by jonathan.labin
I see in the documentation for Drools Expert a description of how to set
global variables through the API via a StatefullKnowledgeSession or
StatelessKnowledgeSession.
How is this achieved when using the Drools Planner? I have a solver
instance that is created from a XmlSolverFactory (as shown in the examples).
Is there a sequence of getters calls originating at the Solver instance that
ultimately gets to the ksession on which setGlobal can be called?
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13 years
Re: [rules-users] Migrate from 5.2.0 to 5.5.0
by ge0ffrey
Alex wrote
> Hello,
>
> I am trying to migrate from drools version 5.2.0 to 5.5.0 and after change
> libs i get a error:
>
> java.lang.NoClassDefFoundError: Could not initialize class
> org.drools.rule.builder.DefaultConstraintBuilderFactory
> at org.drools.rule.builder.DroolsCompilerComponentFactory.
> <init>
> (DroolsCompilerComponentFactory.java:11)
> at
> org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:210)
> at org.drools.compiler.PackageBuilderConfiguration.
> <init>
> (PackageBuilderConfiguration.java:165)
> at
> org.drools.builder.impl.KnowledgeBuilderFactoryServiceImpl.newKnowledgeBuilderConfiguration(KnowledgeBuilderFactoryServiceImpl.java:26)
> at
> org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(KnowledgeBuilderFactory.java:85)
>
> Could you please help me with this problem?
Looks like you re combining the wrong jars together, check your classpath
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13 years
