dhis2-devs team mailing list archive

[James Chang <jamesbchang@xxxxxxxxx>]

Good to know.  Thanks, Jason.

On Mon, Nov 30, 2015 at 12:26 AM, Jason Pickering <
jason.p.pickering@xxxxxxxxx> wrote:

> Hi James,
>
> Another example you might want to have a look at is here
>
> http://rpubs.com/jason_p_pickering/124722
>
> This shows how an external script can interact with both the API as well
> as the database. In certain cases, it may be much more efficient to
> interact/query the database directly as opposed to going through the API,
> for instance, with data intensive tasks better performed at the database
> level, or for things which are perhaps not so convenient through the API
> (unwinding category option combos is one example). This script (in R)
> partially uses the WebAPI, as well as the database, to perform "validation
> rule analytics", outside of the system.
>
> I guess similar libraries to access the database directly with NodeJS are
> available (https://www.npmjs.com/package/pg) to query the database
> directly with Node.
>
> So my point is, interacting directly with the API has advantages, as the
> script can be run from anywhere, but accessing the database directly, may
> be more efficient, or in certain cases, the only way, but you are then
> obviously limited to running the script on a machine that actually has
> access to the DHIS2 database directly (which of course, does not need to be
> the same machine as is running the application).
>
> Regards,
> Jason
>
>
>
>
>
> On Mon, Nov 30, 2015 at 7:00 AM, James Chang <jamesbchang@xxxxxxxxx>
> wrote:
>
>> Thanks, Jason.
>>
>> Looked at the 'integrity.js'.  Quite good to find that I can use NodeJS
>> to make it run via cron job.
>> Having it in java takes care of handling the JSON data quite easily.
>>
>> Will have to install related libraries, but that's a great option.  Much
>> better than doing it via Java.
>>
>> Thanks for the file.
>>
>>
>> On Sun, Nov 29, 2015 at 4:46 AM, Jason Pickering <
>> jason.p.pickering@xxxxxxxxx> wrote:
>>
>>> Hi James,
>>>
>>> There are many different ways to do this, and it may or may not be
>>> necessary to access the database at all.
>>>
>>> Really any scripting language can be used to automate tasks. Some of the
>>> ones which I know are being used are Bash, NodeJS, Python and R. Likely
>>> there are others out there.   There is no requirement to have a Java
>>> executable by any means, but it of course could be done this way, if you
>>> were so inclined. Anything which can interact with the WebAPI using HTTP
>>> should be fine.
>>>
>>> Here is a good example in  NodeJS-
>>> https://github.com/dhis2/dhis2-utils/blob/master/resources/nodejs/integrity/integrity.js
>>> of a task which checks some special Integrity SQL views, and then sends out
>>> a notification if any of them fail.
>>>
>>> The basic pattern though is to access some enpoint through the API,
>>> process what you need in your script, and possibly post something back to
>>> the server. The other way, as Pierre points out, would be to call an SQL
>>> view with a cron job through the API, but It would seem not to be really
>>> what you want to do, if you do not want to use PgAgent, which could do the
>>> same thing.
>>>
>>> Regards,
>>> Jason
>>>
>>>
>>>
>>> On Sun, Nov 29, 2015 at 8:59 AM, Pierre Dane <pierre@xxxxxxxxx> wrote:
>>>
>>>> so I suggest using cron with curl to call the sqlview
>>>>
>>>> On Sunday, 29 November 2015, James Chang <jamesbchang@xxxxxxxxx> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> In DHIS Server, we are trying to create a scheduled task that checks
>>>>> events and update some data in events.
>>>>>
>>>>> We like to avoid using database scheduler (like pgadmin III PgAgent)
>>>>>
>>>>> That leaves us (We think) with:
>>>>>
>>>>>   - cron job with shell script using database sql comments (in file)
>>>>>   - cron job with java executable (and Web API calls within Java)
>>>>>
>>>>>
>>>>> We prefer to do this using Web API.
>>>>>
>>>>> Does that mean 'cron job with java executable' is the only choice we
>>>>> could have for our operation?
>>>>>
>>>>> Any suggestion on other methods that we could use to set up a 'Web API
>>>>> data checking/updating' scheduled task?  (If there is, could you also
>>>>> provide us with example?)
>>>>>
>>>>> Thank you.
>>>>>
>>>>
>>>>
>>>> --
>>>> *Pierre Dane*
>>>>
>>>> Jembi Health Systems
>>>> Software Development Manager
>>>> tel: +27 (0)21 701 0939
>>>> cel: +27 (0)83 680 8274
>>>> email: pierre@xxxxxxxxx
>>>> web: www.jembi.org
>>>>
>>>>
>>>>
>>>>
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>>>>
>>>
>>>
>>> --
>>> Jason P. Pickering
>>> email: jason.p.pickering@xxxxxxxxx
>>> tel:+46764147049
>>>
>>
>>
>
>
> --
> Jason P. Pickering
> email: jason.p.pickering@xxxxxxxxx
> tel:+46764147049
>