Comments on: Esper primer

By: Turco

Turco — Tue, 24 Aug 2010 13:05:33 +0000

@Anshul , to overcome this problem (“espertech.esper.client*”) add esper’s libs. and .jar files …

Regards…

By: roozbeh

roozbeh — Thu, 22 Jul 2010 11:05:38 +0000

where can i find the org.slf4j.Logger ?

By: Pradeep

Pradeep — Fri, 11 Jun 2010 15:57:11 +0000

thanks good one
can you provide a similar event processing example to send JMS events to esper engine

By: Anshul

Anshul — Thu, 27 May 2010 07:54:37 +0000

Hello
I am new to esper and ecllipse.
Can you tell me how to run these programs whether on ecllipse or esper.
When I simply compile your programs using java in command prompt it says an error because it cant find espertech.esper.client*
So please throw some light on how to start running these programs from scratch.
I will be highly obliged if you help me out.

By: Sudhakar Reddy

Sudhakar Reddy — Thu, 04 Mar 2010 04:44:13 +0000

Hi Dhruba Bandopadhyay,

I am using EPSER for CEP. I had done RD and able to upload CVS file in Adapter. I had written mulitple queries and they are firing against the data from CVS thru polling.

The problem is Esper didnt gave examples to write some block of EPL queries using case statements or EPL blocks similar to PL/SQL block. I need to update multiple streams based on data in one particular stream. I am using custom Utility classes in queries to simply business logic. Is there any way that I can pass stream to the Custome classes so that i
can modify the stream in Utility classes itself.

Pl reply….

Regards
Sudhakar Reddy.

By: adnan

adnan — Wed, 13 Jan 2010 03:52:19 +0000

Hi Abdus salam

I hope u r fine. I am just wondering if u have tried to save the events in csv file. Any suggision how we can do that?

Regards
Adnan

By: adnan rashid

adnan rashid — Sat, 19 Dec 2009 23:16:01 +0000

Thanks Abdus Salam. It worked .I tried using absolute path from root and also using your comment and it did work in both cases now.

Once again appreciate your kind reply.

By: Md. Abdus Salam

Md. Abdus Salam — Sat, 19 Dec 2009 04:19:55 +0000

hi!

I did the following to overcome this problem

File inFile = new File("test.csv");
AdapterInputSource adapterInputSource = new AdapterInputSource(inFile);

try it and I’m sure u will get output of the second example

By: adnan

adnan — Fri, 18 Dec 2009 12:51:56 +0000

Hi I am getting the same error as file not found. Tried few options by giving obsolute path but still having the same error. Any suggion would be greatly appreciated.\

log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" com.espertech.esper.client.EPException: test.csv not found
	at com.espertech.esperio.AdapterInputSource.resolvePathAsStream(AdapterInputSource.java:198)
	at com.espertech.esperio.AdapterInputSource.getAsStream(AdapterInputSource.java:157)
	at com.espertech.esperio.csv.CSVSource.(CSVSource.java:36)
	at com.espertech.esperio.csv.CSVReader.(CSVReader.java:53)
	at com.espertech.esperio.csv.CSVInputAdapter.finishInitialization(CSVInputAdapter.java:213)
	at com.espertech.esperio.csv.CSVInputAdapter.(CSVInputAdapter.java:64)
	at com.espertech.esperio.csv.CSVInputAdapter.(CSVInputAdapter.java:76)

By: Adnan

Adnan — Thu, 17 Dec 2009 14:23:32 +0000

Dear Abdus Salam

Thanks for your kind reply. Yes my first one is working fine now. Did your program work when u tried to load from the csv file ?

Regards
Adnan