On Sun, Mar 19, 2017 at 4:02 PM, Madhawa Vidanapathirana < madhawavidanapathir...@gmail.com> wrote:
> Hi Suho, > > Going ahead with the proposal, few questions crossed my mind. > > 1. You mentioned previously that WSO2 DAS should also be supported. > What sort of interactions are expected with WSO2 DAS? > 1. Should publishing events to WSO2 DAS from Python Siddhi API > supported? > 2. Should deploying of Siddhi Queries to WSO2 DAS through Python > Siddhi API be supported? > 3. Any other expectations? > > For the integration with DAS we can use HTTP calls and deploy Siddhi queries and send events to that, we should also start a server from the python side to receive events from DAS and print them. We can work on the details of that after the proposal. One more thing to add, can we also implement Siddhi (the project you will be creating) to be installed via pip ? Regards Suho If any of above can be considered as "optional", indicate them as well. > > Regards, > Madhawa > > On Sat, Mar 18, 2017 at 9:00 PM, Sriskandarajah Suhothayan <s...@wso2.com> > wrote: > >> For the initial cut this looks good, please go ahead with the proposal. >> Let's check some other alternatives and start the development. >> >> Regards >> Suho >> >> On Sat, Mar 18, 2017 at 1:01 PM, Madhawa Vidanapathirana < >> madhawavidanapathir...@gmail.com> wrote: >> >>> Hi Suho, >>> >>> You can find the python version of test case written using Pyjnius in >>> below link. >>> https://github.com/madhawav/CEP-Python-Wraps/tree/master/Pyj >>> nius%20Prototype%20Wrap >>> Instructions on building the code is also given their. >>> >>> During development, I noticed following disadvantages of Pyjnius API >>> >>> - Not compatible with Python 3.x. >>> - There are no stable releases. However, the code available in >>> master branch is relatively stable. >>> - Difficult to configure. It is required to develop the library from >>> source. This would make it difficult to distribute an API developed on >>> Pyjnius. >>> - There are no evidence that a proper release would be done soon. >>> >>> However, Pyjnius supports callback of events from Java to Python. >>> Additionally, it is easier to develop using Pyjnius ones it is configured. >>> >>> So, I had a looked at some of the other options as well. >>> >>> Java Bridge >>> >>> *Advantages* >>> >>> - Has stable releases available through Python Package Index. (pip) >>> >>> *Disadvantages* >>> >>> - No direct call-back mechanism to receive events from Java side. It >>> is possible to execute Python scripts in Java but those scripts would >>> not >>> be in same context as Python Host App. >>> - Comparatively harder to develop on but it is manageable. >>> >>> Py4J >>> >>> The main difference in Py4J is that it uses socket connections to >>> communicate with JVM instead of JNI. (secured socket connections are >>> possible). >>> >>> *Advantages* >>> >>> - Stable release available through Python Package Index (pip). Easy >>> to configure. >>> - Can connect to an already running Java application (with Py4J) and >>> communicate with it. (Thus, can be used to communicate with a running >>> instance of WSO2 CEP) >>> - Supports callback events. >>> - Well maintained documentation. Active project. >>> >>> *Disadvantages* >>> >>> - Would require a work-around to avoid clashing between socket >>> connection ports when concurrent applications use the API. >>> >>> As of now, I feel Py4J is the most suitable option. However, I am yet to >>> look at some other options available such as JPy and JCC. >>> >>> Regards, >>> >>> Madhawa >>> >>> On Wed, Mar 15, 2017 at 11:10 PM, Sriskandarajah Suhothayan < >>> s...@wso2.com> wrote: >>> >>>> Great, do also start working on writing the project proposal. >>>> >>>> Regards >>>> Suho >>>> >>>> On Wed, Mar 15, 2017 at 10:58 PM, Madhawa Vidanapathirana < >>>> madhawavidanapathir...@gmail.com> wrote: >>>> >>>>> Hi Suho, >>>>> Progress made so far is managed to write a python version of test case >>>>> you suggested using Pyjnius [1] [2]. >>>>> Pyjnius is capable of handling method calls and callbacks to/from JAVA >>>>> via JNI. >>>>> >>>>> I will send the code here after I properly arrange it into a prototype >>>>> API. >>>>> >>>>> [1] - https://pyjnius.readthedocs.io/en/latest/index.html >>>>> [2] - https://github.com/kivy/pyjnius/blob/master/docs/source/inde >>>>> x.rst >>>>> >>>>> Regards, >>>>> Madhawa >>>>> >>>>> On Wed, Mar 15, 2017 at 1:11 AM, Sriskandarajah Suhothayan < >>>>> s...@wso2.com> wrote: >>>>> >>>>>> As the first step focus on building APIs such that we can write the >>>>>> following test case[1] in python. >>>>>> >>>>>> [1]https://github.com/wso2/siddhi/blob/master/modules/siddhi >>>>>> -samples/quick-start-samples/src/main/java/org/wso2/siddhi/s >>>>>> ample/SimpleFilterSample.java >>>>>> >>>>>> Regards >>>>>> Suho >>>>>> >>>>>> On Tue, Mar 14, 2017 at 9:55 AM, Madhawa Vidanapathirana < >>>>>> madhawavidanapathir...@gmail.com> wrote: >>>>>> >>>>>>> Hi, >>>>>>> Thank you for your quick reply. >>>>>>> >>>>>>> Since directly using Siddhi Library is the more general case, I'll >>>>>>> first focus on it. >>>>>>> >>>>>>> 1) I am thinking about following the same structure in JAVA API, >>>>>>> centered around Siddhi Manager. Any opinions on this? >>>>>>> 2) Any idea on extent to which lower level/internal components >>>>>>> should be exposed? (e.g. - Exposing "StreamDefinition" class in >>>>>>> addition to >>>>>>> creating stream via Siddhi query using "siddhiManager. >>>>>>> createExecutionPlanRuntime"). I have heard that it is usually >>>>>>> discouraged to use lower level components instead of the query approach. >>>>>>> >>>>>>> Will try to send you a prototype covering basic functionality >>>>>>> through Siddhi Java API, before making the proposal for entire project. >>>>>>> >>>>>>> Madhawa >>>>>>> >>>>>>> On Mon, Mar 13, 2017 at 9:53 PM, Sriskandarajah Suhothayan < >>>>>>> s...@wso2.com> wrote: >>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> On Sun, Mar 12, 2017 at 12:37 PM, Madhawa Vidanapathirana < >>>>>>>> madhawavidanapathir...@gmail.com> wrote: >>>>>>>> >>>>>>>>> Hi. >>>>>>>>> >>>>>>>>> I am an undergraduate from Department of Computer Science and >>>>>>>>> Engineering, University of Moratuwa. I recently completed my >>>>>>>>> internship at >>>>>>>>> WSO2 working with the Support Team on the project WSO2 Support >>>>>>>>> Knowledge >>>>>>>>> Base. >>>>>>>>> >>>>>>>>> I am interested on GSOC Project* "Proposal 16: Python API for >>>>>>>>> Siddhi CEP"*. My internship project at WSO2 was almost entirely >>>>>>>>> done using Python. Additionally, I used Py4J Framework to interface >>>>>>>>> certain >>>>>>>>> parts of the project to JAVA APIs. Furthermore, I have a certain >>>>>>>>> amount of >>>>>>>>> exposure with Siddhi/CEP through the WHACK project I took part. >>>>>>>>> >>>>>>>>> I went through the provided details in WSO2 GSOC 2017 Project List >>>>>>>>> page and I am interested to know some more details. >>>>>>>>> >>>>>>>>> 1. What version of CEP/Siddhi should be used by the API? >>>>>>>>> >>>>>>>>> You need to support the latest released version of Siddhi and DAS >>>>>>>> which is in DAS 3.1 and also for the latest Siddhi (4.0) >>>>>>>> >>>>>>>>> >>>>>>>>> 1. In the description, does "Service APIs" refer to "Admin >>>>>>>>> Services API" which is usually used by Admin Panel to communicate >>>>>>>>> with CEP? >>>>>>>>> >>>>>>>>> Yes, to deploy the queries and to send and receive events >>>>>>>> >>>>>>>>> >>>>>>>>> 1. Should the Siddhi Python API require WSO2 CEP to be running >>>>>>>>> in order to make Python API usable? >>>>>>>>> >>>>>>>>> Not necessay it should both work with the running CEP/DAS and use >>>>>>>> Siddhi library in the ohter cases. >>>>>>>> >>>>>>>>> >>>>>>>>> 1. Is the Python API expected to do configuring of Siddhi CEP, >>>>>>>>> streaming events to/from Siddhi CEP, or both? >>>>>>>>> >>>>>>>>> Yes in terms of queries. >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>>> Thank You >>>>>>>>> >>>>>>>>> >>>>>>>>> -- >>>>>>>>> *Madhawa Vidanapathirana* >>>>>>>>> Student >>>>>>>>> Department of Computer Science and Engineering >>>>>>>>> University of Moratuwa >>>>>>>>> Sri Lanka >>>>>>>>> >>>>>>>>> Mobile: (+94) 716874425 <071%20687%204425> >>>>>>>>> Email: madhawavidanapathir...@gmail.com >>>>>>>>> Linked-In: https://lk.linkedin.com/in/madhawa-vidanapathiran >>>>>>>>> a-3430b94 >>>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> -- >>>>>>>> >>>>>>>> *S. Suhothayan* >>>>>>>> Associate Director / Architect & Team Lead of WSO2 Complex Event >>>>>>>> Processor >>>>>>>> *WSO2 Inc. *http://wso2.com >>>>>>>> * <http://wso2.com/>* >>>>>>>> lean . enterprise . middleware >>>>>>>> >>>>>>>> >>>>>>>> *cell: (+94) 779 756 757 <+94%2077%20975%206757> | blog: >>>>>>>> http://suhothayan.blogspot.com/ >>>>>>>> <http://suhothayan.blogspot.com/>twitter: >>>>>>>> http://twitter.com/suhothayan <http://twitter.com/suhothayan> | >>>>>>>> linked-in: >>>>>>>> http://lk.linkedin.com/in/suhothayan >>>>>>>> <http://lk.linkedin.com/in/suhothayan>* >>>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> -- >>>>>>> *Madhawa Vidanapathirana* >>>>>>> Student >>>>>>> Department of Computer Science and Engineering >>>>>>> University of Moratuwa >>>>>>> Sri Lanka >>>>>>> >>>>>>> Mobile: (+94) 716874425 <071%20687%204425> >>>>>>> Email: madhawavidanapathir...@gmail.com >>>>>>> Linked-In: https://lk.linkedin.com/in/madhawa-vidanapathiran >>>>>>> a-3430b94 >>>>>>> >>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> >>>>>> *S. Suhothayan* >>>>>> Associate Director / Architect & Team Lead of WSO2 Complex Event >>>>>> Processor >>>>>> *WSO2 Inc. *http://wso2.com >>>>>> * <http://wso2.com/>* >>>>>> lean . enterprise . middleware >>>>>> >>>>>> >>>>>> *cell: (+94) 779 756 757 <+94%2077%20975%206757> | blog: >>>>>> http://suhothayan.blogspot.com/ <http://suhothayan.blogspot.com/>twitter: >>>>>> http://twitter.com/suhothayan <http://twitter.com/suhothayan> | >>>>>> linked-in: >>>>>> http://lk.linkedin.com/in/suhothayan >>>>>> <http://lk.linkedin.com/in/suhothayan>* >>>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> *Madhawa Vidanapathirana* >>>>> Student >>>>> Department of Computer Science and Engineering >>>>> University of Moratuwa >>>>> Sri Lanka >>>>> >>>>> Mobile: (+94) 716874425 <071%20687%204425> >>>>> Email: madhawavidanapathir...@gmail.com >>>>> Linked-In: https://lk.linkedin.com/in/madhawa-vidanapathirana-3430b94 >>>>> >>>> >>>> >>>> >>>> -- >>>> >>>> *S. Suhothayan* >>>> Associate Director / Architect & Team Lead of WSO2 Complex Event >>>> Processor >>>> *WSO2 Inc. *http://wso2.com >>>> * <http://wso2.com/>* >>>> lean . enterprise . middleware >>>> >>>> >>>> *cell: (+94) 779 756 757 <+94%2077%20975%206757> | blog: >>>> http://suhothayan.blogspot.com/ <http://suhothayan.blogspot.com/>twitter: >>>> http://twitter.com/suhothayan <http://twitter.com/suhothayan> | linked-in: >>>> http://lk.linkedin.com/in/suhothayan >>>> <http://lk.linkedin.com/in/suhothayan>* >>>> >>> >>> >>> >>> -- >>> *Madhawa Vidanapathirana* >>> Student >>> Department of Computer Science and Engineering >>> University of Moratuwa >>> Sri Lanka >>> >>> Mobile: (+94) 716874425 <071%20687%204425> >>> Email: madhawavidanapathir...@gmail.com >>> Linked-In: https://lk.linkedin.com/in/madhawa-vidanapathirana-3430b94 >>> >> >> >> >> -- >> >> *S. Suhothayan* >> Associate Director / Architect & Team Lead of WSO2 Complex Event >> Processor >> *WSO2 Inc. *http://wso2.com >> * <http://wso2.com/>* >> lean . enterprise . middleware >> >> >> *cell: (+94) 779 756 757 <+94%2077%20975%206757> | blog: >> http://suhothayan.blogspot.com/ <http://suhothayan.blogspot.com/>twitter: >> http://twitter.com/suhothayan <http://twitter.com/suhothayan> | linked-in: >> http://lk.linkedin.com/in/suhothayan <http://lk.linkedin.com/in/suhothayan>* >> > > > > -- > *Madhawa Vidanapathirana* > Student > Department of Computer Science and Engineering > University of Moratuwa > Sri Lanka > > Mobile: (+94) 716874425 <071%20687%204425> > Email: madhawavidanapathir...@gmail.com > Linked-In: https://lk.linkedin.com/in/madhawa-vidanapathirana-3430b94 > -- *S. Suhothayan* Associate Director / Architect & Team Lead of WSO2 Complex Event Processor *WSO2 Inc. *http://wso2.com * <http://wso2.com/>* lean . enterprise . middleware *cell: (+94) 779 756 757 <077%20975%206757> | blog: http://suhothayan.blogspot.com/ <http://suhothayan.blogspot.com/>twitter: http://twitter.com/suhothayan <http://twitter.com/suhothayan> | linked-in: http://lk.linkedin.com/in/suhothayan <http://lk.linkedin.com/in/suhothayan>*
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