Hi Madawa, Have you evaluated this approach? What are the advantages and drawbacks in > terms of storage and retrieval of images by following this approach?
I've yet to look more into this option. I was actually hoping for some feedback on whether or not I should pursue this or stick with the RDBMS approach since I'm not experienced enough with Siddhi to do a knowledgeable assessment. At the moment, for the use case at hand, a simple storage and retrieval would suffice. But if we consider the long run IMO it would be smarter to go with a Siddhi based approach. Then again comes the issue of whether Siddhi streams support image analytics. On Tue, Jan 16, 2018 at 12:50 PM, Madawa Soysa <mada...@wso2.com> wrote: > Hi Nuwan, > > One other approach suggested to me was to use a *Siddhi Stream for both >> storage and retrieval* purposes. This would further allow for analytics >> to be performed on the data which not be very much possible with the >> earlier mentioned approaches. > > > Have you evaluated this approach? What are the advantages and drawbacks in > terms of storage and retrieval of images by following this approach? > > On Tue, Jan 16, 2018 at 12:36 PM, Geeth Munasinghe <ge...@wso2.com> wrote: > >> >> >> On Tue, Jan 16, 2018 at 10:52 AM, Nuwan Jayawardene <nuw...@wso2.com> >> wrote: >> >>> Hi all, >>> >>> I'm currently working on a project to add image storing and retrieval >>> capabilities to the WSO2 IoT Server. >>> >>> To achieve this I have implemented the following; >>> 1) Added a separate DAO Table with a field with LONGBLOB data type for >>> storing. >>> 2) Added storage capabilities in the database for an image sent as a *File >>> *in the form of a *BinaryStream*. >>> >>> As of now, I've written unit tests and the test images are getting >>> stored successfully in the database. >>> >>> The problem lies in how to successfully retrieve the stored data. For >>> this, I have come across 2 possible approaches. >>> 1) *Retrieve as a File - *The notable downside I realized with this >>> solution is that each time a new Image is retrieved, a new file will be >>> created. Therefore measures would have to be taken to persist new files >>> while purging older obsolete ones. >>> 2) *Retrieve as BinaryStream - *Although this requires no persistent >>> memory usage and the data will only be retrieved on call and issues may >>> come up when representing that data from a UI end. Further analysis is >>> required for this approach. >>> >> >> +1 for retrieving as a BinaryStream. This will make it easy to handle in >> the java level unlike handling as a file. This has to work in the cluster >> of servers, hence retrieving as a file will cause other syncing issues. >> >> >>> 3) *Retrieve as FileOutputStream - *This is my preferred method and the >>> one recommended mostly in forums and tutorials. >>> >>> One other approach suggested to me was to use a *Siddhi Stream for both >>> storage and retrieval* purposes. This would further allow for analytics >>> to be performed on the data which not be very much possible with the >>> earlier mentioned approaches. >>> >>> Suggestions and Feedback are appreciated. >>> Thanks and regards! >>> >>> -- >>> *Nuwan Jayawardene* >>> *Software Engineering Intern* >>> *WSO2, Inc.:http://wso2.com <http://wso2.com/>* >>> *lean.enterprise.middleware* >>> *Mobile :- +94 71 1813299 <+94%2071%20181%203299>* >>> >>> >>> - *Linkedin* *:- **https://www.linkedin.com/in/nuwa >>> <https://www.linkedin.com/in/nuwanjaya/>**njaya/ >>> <https://www.linkedin.com/in/nuwanjaya/>* >>> - * <https://www.wso2.com/signature>* >>> >>> >> >> >> -- >> *Geeth Munasinghe* >> *WSO2, Inc. http://wso2.com <http://wso2.com/> * >> *lean.enterprise.middleware.* >> >> email: ge...@wso2.com >> phone:(+94) 777911226 <+94%2077%20791%201226> >> >> <http://wso2.com/signature> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "WSO2 IoT Team Group" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to iot-group+unsubscr...@wso2.com. >> For more options, visit https://groups.google.com/a/wso2.com/d/optout. >> > > > > -- > > Madawa Soysa / Software Engineer > mada...@wso2.com / +94714616050 <+94%2071%20461%206050> > > *WSO2 Inc.* > lean.enterprise.middleware > > <https://wso2.com/signature> > > > > -- *Nuwan Jayawardene* *Software Engineering intern* *WSO2, Inc.:http://wso2.com <http://wso2.com/>* *lean.enterprise.middleware* *Mobile :- +94 71 1813299* - *Linkedin* *:- **https://www.linkedin.com/in/nuwa <https://www.linkedin.com/in/nuwanjaya/>**njaya/ <https://www.linkedin.com/in/nuwanjaya/>* - * <https://www.wso2.com/signature>*
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