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Disconnected Warehouse and Sales Application Question (Disconnected)

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  • TheSmitchell
    replied
    Re: Disconnected Warehouse and Sales Application Question (Disconnected)

    Local Storage is independent of App Cache.

    App Cache is where the HTML, CSS, and JS files will be stored. The size of app cache is browser dependent. Some limit to 5MB or less. Others have no limit.

    Local Storage is where you store data for your web application in the form of key-value pairs. Limited to 5MB.

    Leave a comment:


  • christappan
    replied
    Re: Disconnected Warehouse and Sales Application Question (Disconnected)

    The images, js and css files, etc are stored in the App Cache I mentioned. What I can't get clarity on is if the App Cache and localStorage share that 5MB of local storage.

    Leave a comment:


  • TheSmitchell
    replied
    Re: Disconnected Warehouse and Sales Application Question (Disconnected)

    Originally posted by pettechservices View Post
    The other issue that may come into play (which I learned from the Alpha conference) is how much data will need to be stored in between internet and no internet. I believe they said the limit is 5MB (but I could be wrong on the amount). I have not used disconnected model yet so I can't give further advice, but I would recommend creating a quick mock up of the application and try it out for a day or at least simulate the amount of data that they will be collecting and see what happens... unless others weigh in.
    I think the 5MB limit refers to the JSON object created to persist the record data (and cache local changes). Images, I believe, are stored in a separate space. Unless you encode them into the json object. .js, .css, and .html files live somewhere else.

    Leave a comment:


  • christappan
    replied
    Re: Disconnected Warehouse and Sales Application Question (Disconnected)

    Also not an expert but I've been working on a disconnected app this week. Just Googleing, there are a variety of answers to the local storage limits questions (http://www.html5rocks.com/en/tutoria...uota-research/) depending on storage type, the browser, and some browsers/devices allow the user to allow more than the protocols call for, etc.

    What I can say is that for the disconnected lists, Alpha is using "local storage" (as opposed to WebSQL or IndexedDB, etc). I've been working to figure out storing my page with UX component itself (panels for the lists with detail views, everything for this project in one UX) in App Cache, which is a different local storage type and Googling around I'm not finding clear answers on those limits either. I do see that there's usually a good 10MB in the answers given but this is usually shared at least in part by the various local storage options.

    I am curious from "the experts" as well, though, how this translates to native apps. I assume the HTML5 storage limits are similar but do the components themselves cut into those limits or are they stored differently in the file systems so as to be separate?

    Leave a comment:


  • JetLi
    replied
    Re: Disconnected Warehouse and Sales Application Question (Disconnected)

    How I wish it is not limited to 5MB only, Anyway I dont know yet how many sales or invoice records will 5MB contain. In some places, Internet connection may be lost for even a week, especially in third world countries. In the US , of course it will only take a second for Internet connection to resume, and that is how disconnected feature of alpha comes into play.

    Some Developers Suggested http://visualwebgui.com , its free and has offline feature for Visual Studio Developers
    Last edited by JetLi; 11-09-2014, 08:20 PM.

    Leave a comment:


  • pettechservices
    replied
    Re: Disconnected Warehouse and Sales Application Question (Disconnected)

    The other issue that may come into play (which I learned from the Alpha conference) is how much data will need to be stored in between internet and no internet. I believe they said the limit is 5MB (but I could be wrong on the amount). I have not used disconnected model yet so I can't give further advice, but I would recommend creating a quick mock up of the application and try it out for a day or at least simulate the amount of data that they will be collecting and see what happens... unless others weigh in.

    Leave a comment:


  • PaulAmmoun
    replied
    Re: Disconnected Warehouse and Sales Application Question (Disconnected)

    Hi Jetson ,
    You can have as many list as needed. It can be linked together.
    As an example:
    List1 contains the invoices. (Invoice No,Date,Customer Etc..)
    List2 (Joined on invoiceno) Contains Items (ItemCode,Description,Qty,Price Etc..)
    List3 (Joined on items) Contains the serial No of the sold items (ItemCode,SerialNo Etc..)

    I have done a small Application used on the warehouse. Where the warehouse user scan the serial no of the items to be delivered.
    The first list contains the invoices (The user search for the customer that is being delivered).
    Then a list of all items is displayed (For that invoice). He click on an items and scans the serial No. (If the Qty is 5 he needs to scan 5 serial No). etc..
    It is working ok and it is disconnected since not all the warehouse is covered with wifi. Nevertheless it does not stay all day without connection. It stays for 1h max.
    The big draw back is that for no apparent reason the user is logged out and needs to login again thus requiring internet connection. This is a major drawback for entrepreise disconnected app.
    I did not try it with phonegap yet. It just open in a browser I am using android with 2 machines (Having a barcode scanner integrated motorola MC40 and motorola TC55).

    Whenever the list open it loads with the default list. Then you can add a "REFRESH" button that will re-load/refresh the list. Then you should also have another "synchronize" button that will commit the info to the server.
    Before issuing the command you can check there is an internet connection then inform the user.

    I work a lot on invoicing / ERP applications.

    Let me know if can be of any help (Within my "limited" knowledge of alpha).

    Have a nice sunday

    Paul

    Leave a comment:


  • JetLi
    replied
    Re: Disconnected Warehouse and Sales Application Question (Disconnected)

    Thanks Paul for sharing your idea, on using the list, I think it is only for single table, what if I want to have 3 tables on one page, I am basically doing an invoice app with inventory management.
    For the long answer of yours, since internet connection is always slow on one place, we will deliberately be loading the info in the morning then do all the sales offline then upload in the afternoon after closing time.
    by the way, you mentioned downloading the info in the morning, is it automatic if I connect the device online or I have to code something on a button to download all info on the "MOTORLO M0C40" ?

    Leave a comment:


  • PaulAmmoun
    replied
    Re: Disconnected Warehouse and Sales Application Question (Disconnected)

    Hi again,
    for the devices if you are looking for enterprise devices and not phones you can check the "MOTORLO MC40" it is android and very heavy duty.
    I am not an expert but I worked with alpha disconnected features.
    To answer your question: The short answer is YES it is doable.
    for the long answer :):)
    you have to use lists with details view then add a synchronize button that will check if there is a connection and if so synchronize the list (s).
    If the connection gets slow and disconnect for some time during the day there should be no problem at all.
    But if you are planing to load the information in the morning then stay all day with no connection at all and synchronize in the afternoon I don't know if you will run into problem.
    I think to make it robust You will then have to add a lot of code.

    I would also like to hear the answer of the "real experts"

    Paul

    Leave a comment:


  • Disconnected Warehouse and Sales Application Question (Disconnected)

    I am planning to create a web application to be used by a business that has a warehouse and 5 or more branches. Problem is that Internet connection is too slow and some areas dont have any access to the internet, and I think this is where Alpha Anywhere Disconnected feature comes into play. I just want to confirm if this would be possible to create and How does it upload sales to the server so that managers can see live data, in other branches of the business, they will do the sales offline, transfers and receiving of stocks(hopefully this is possible) , then after doing the sales, transfers and receiving offline, the user will now travel to a location where he/she has internet access then upload the data/transactions. Is this possible? What specific mobile device will be used or what is the specific specification of a certain device so that it would be capable of handling the said scenario? Thanks!
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