epl

问题 I want to build a CEP-Engine which is dynamic so you can add different event streams. As soon as a new stream is added, Esper should be able to read all the properties of the stream and put it into a list, for example. (For example integer id, long temperature, date timestamp etc.) Is this possible in Esper? Would be very grateful for any help 回答1: In order to add a stream at runtime you can use create-schema. create schema MyStream(id int, ...) For a stream that accepts events that an

问题 I want to be able to add event streams where I don't know beforehand what kind of properties the events have. So I don't know before if there is an integer ID or if there is a date timestamp and which payload might be there. As soon as I add such an unknown event, Esper should examine the stream and return the contained properties of the stream to me. 回答1: Thank you very much. That actually helps me a lot. But a function which returns all property names directly does not exist, does it? So I

问题 I want to be able to add event streams where I don't know beforehand what kind of properties the events have. So I don't know before if there is an integer ID or if there is a date timestamp and which payload might be there. As soon as I add such an unknown event, Esper should examine the stream and return the contained properties of the stream to me. 回答1: Thank you very much. That actually helps me a lot. But a function which returns all property names directly does not exist, does it? So I

问题 I have the two events: A and B. Everytime A occurs, B have to occur afterwards without any As in between. Has anybody got an idea, how to implement this? I thought about something like pattern[every A -> A until B] But this statement is true, even if A is followed B without any other As in between. But it should only be true in case of AAB or AAAAB and so on.. Thank you for your help. 回答1: One possible solution is the pattern A -> (A and not B) Doing so the query is only true, when the rule

问题 I have a Zebra GK420d connect to OS X via CUPS. However, when I send files to it that are written in ZPL or EPL they are only printed in plain text. Am I required to change to mode on the printer? 回答1: Contrary to what others said, you don't need to specially add a raw queue. Instead, you can submit raw files into any queue using -o raw switch: lpr -P CupsPrinterName -o raw path/to/label.zpl Printer name can be found over that link in CUPS: http://localhost:631/printers/ This also works on

问题 I have a Zebra GK420d connect to OS X via CUPS. However, when I send files to it that are written in ZPL or EPL they are only printed in plain text. Am I required to change to mode on the printer? 回答1: Contrary to what others said, you don't need to specially add a raw queue. Instead, you can submit raw files into any queue using -o raw switch: lpr -P CupsPrinterName -o raw path/to/label.zpl Printer name can be found over that link in CUPS: http://localhost:631/printers/ This also works on

问题 I am playing around with Esper, learning how to use more advanced concepts. I have a program that fires mock stock events of 3 different stocks. I currently have a module with match_recognize pattern EPL that looks like this: module queries; import events.*; import configDemo.*; import annotations.*; create schema MyTickEvent as TickEvent; @Name('compareStocks') @Description('Compare the difference amount between two stocks') @Subscriber(className='configDemo.MySubscriber') select * from

问题 Background Information: Mac OS X Lion 10.7.3 (11D50b) EPL: http://en.wikipedia.org/wiki/Eltron_Programming_Language EPL Manual: http://www.geksagon.ru/i/2/EPL2_Manual.pdf I am connecting to the printer via a 2-port serial to Ethernet server. Printer Config Readout: UKQ1935H U UPS V4.14 S/N: 64A024100181 Serial port:96,N,8,1 Image buffer size:0245K Fmem:001.0K,059.9K avl Gmem:000K,0058K avl Emem:010K,0058K avl I8,C,001 rY S4 D10 R000,000 ZT UN q832 Q609,24 Option:D oUs,t,u 10 19 29 Using PHP I

问题 Background Information: Mac OS X Lion 10.7.3 (11D50b) EPL: http://en.wikipedia.org/wiki/Eltron_Programming_Language EPL Manual: http://www.geksagon.ru/i/2/EPL2_Manual.pdf I am connecting to the printer via a 2-port serial to Ethernet server. Printer Config Readout: UKQ1935H U UPS V4.14 S/N: 64A024100181 Serial port:96,N,8,1 Image buffer size:0245K Fmem:001.0K,059.9K avl Gmem:000K,0058K avl Emem:010K,0058K avl I8,C,001 rY S4 D10 R000,000 ZT UN q832 Q609,24 Option:D oUs,t,u 10 19 29 Using PHP I

问题 I have a Zebra Gk420t printer that allows me to make stickers and I need to print an image on them. I read that the images must be in GRF format (pure hex). Someone knows how can I convert the images to GRF format in Linux? I read about Ztools software on Windows, but nothing interesting on Linux... 回答1: Zebra provides a Java API that can convert graphics to GRF. You can use the command line interface to convert images to GRF like so : java -jar ZSDK_API.jar graphic myImage.jpeg -s