I've been able to create a Logic App Custom Connector with a webhook trigger by following the docs, however I can't find any documentation on creating a polling trigger. I was only able to find Jeff Hollan's trigger examples, but the polling trigger doesn't seem compatible with the custom connector.
I tried setting up a polling trigger by performing the following steps:
Create an Azure Function with a GET operation expecting a date time query parameter
Have the function return a set of entities that have changed since the last poll
Configure the custom connector to call the Azure Function with the date time query parameter
Configure the response body of the custom connector
Try different things in the 'Trigger configuration' section, but this is most confusing to me.
Whatever I tried, the trigger always fails with a 404 in the trigger outputs, similar to what I initially had with the webhook trigger type.
There are a few things that confuse me:
1. Path of trigger query seems screwed up
It looks like the custom connector UI screws up the path to the trigger. I noticed this when I downloaded the OpenAPI file. The path to my trigger API should be /api/trigger/tasks/completed, but in the OpenAPI file it read /trigger/api/trigger/tasks/completed. It appears the custom connector adds /trigger in front of the path. I sometimes noticed it doing this multiple times, giving me something similar to /trigger/trigger/trigger/api/trigger/tasks/completed. I fixed this in the OpenAPI file and re-imported it into the custom connector.
2. Trigger Configuration section
I don't understand what to do in the Trigger Configuration section of a polling trigger.
I assume the query parameter to monitor state change is some parameter I define myself, e.g. a timestamp, to determine what entities to return.
As the 'select value to pass to selected query param' I would expect I could pick a timestamp from the trigger response. It looks like I can only pick values from a collection, not scalar values from the response as I would expect. How does that work?
Is 'trigger hint' just some information or does it actually control something?
Related
In PowerApps, custom connector, I need to define the entire structure of the call when I create the custom connector. I know I can mark certain fields (query params) as parameters that can be filled during run time.
What I try to do is to set the value of one of my security http headers at run time.
My connector, with an API key, makes a call to the /extra/auth end point
/extra/auth returns another key value.
I need to use this new key value in any consecutive calls to my APIs in the HEADER of the request.
I can use two separate connectors for the auth and for the application logic (which seems logic to me).
How would you go to set an http header value at run time for a custom connector - REST api?
Hi so i understand firestore write triggers run out of order with respect to time. Is is possible to get timestamp information on when a write occured within the trigger functions execution context?
If you're using the Firebase CLI to deploy, every background function is delivered an EventContext object as its second parameter. You can use its timestamp property. Or, you can have the client write it into the document.
I assume something similar is available for the context object provided to code deployed by gcloud.
I'm trying to understand how a java (client) application that communicates, through JDBC, with a pgSQL database (server) can "catch" the result produced by a query that will be fired (using a trigger) whenever a record is inserted into a table.
So, to clarify, via JDBC I install a trigger procedure prepared to execute a query whenever a record is inserted into a given database table, and from this query's execution will result an output (wrapped in a resultSet, I suppose). And my problem is that I have no idea how the client will be aware of those results, that are asynchronously produced.
I wonder if JDBC supports any "callback" mechanism able to catch the results produced by a query that is fired through a trigger procedure under the "INSERT INTO table" condition. And if there is no such "callback" mechanism, what is the best approach to achieve this result?
Thank you in advance :)
Triggers can't return a resultset.
There's no way to send such a result to the JDBC driver.
There are a few dirty hacks you can use to get results from a trigger to the client, but they're all exactly that. Things like:
DECLARE a cursor for the resultset, then send the cursor name as a NOTIFY payload, so the app can FETCH ALL FROM <cursorname>;
Create a TEMPORARY table and report the name via NOTIFY
It is more typical to append anything the trigger needs to communicate to the app to a table that exists for that purpose and have the app SELECT from it after the operation that fired the trigger ran.
In most cases if you need to do this, you're probably using a trigger where a regular function is a better fit.
I've created a new trigger(before insert, before update) for a custom object which is going to take the information from a Standard Object (Opportunity) this is the problem that i'm facing..
I'm pulling information from the the Opportunity object (lookup field to User) to the new record in the custom object to trigger email alerts when this custom record is created... (i can't use formulas here) with this method everything is going to work when the custom record is created after that all the information is populated on the Opportunity.. the Problem is that sometimes the fields that i'm getting from the Opportunity are not populated before the custom record is created... how can i run the trigger for the custom object when updating the Opportunity record ?? i'm fairly new to APEX so i will like to get some input on how to get this implemented.. ! Thanks
Could you tell us more about what your algorithm is supposed to do?
As long as I can give you one piece of advice on the use of triggers: if the trigger has to perform actions on the object to which it is assigned, then use these events - before insert, before update. But if the trigger has to perform actions on other objects, then use events - after insert, after update, after delete.
More about triggers:
Force.com Apex Code Developer's Guide
Apex Triggers the Definitive Guide
I am new to Drools Fusion, I am unable to create a rule for below condition
Read the server log file with (Date, Error message etc...)
If found Event Type: ERROR with Event Message: "Memory Error" have to
trigger some event (as of now SOP)
Another (with in) 1hr it should not trigger event for same Event Message & Event Type (if its found in log file)
After 1hr if it found the same, it has to trigger event
Note: Have to use same date & time specified in log file
Please do the needful for the same.
I'm not sure exactly what you're looking for. I'll respond conceptually. I'm going to assume you are trying to do everything within the drools framework.
For drools to be constantly aware of the server log you will need to be running a stateful knowledge session and constantly inserting new facts into it. These facts would be derived from the server log.
It looks like you want to talk about Events in your model. Make an Event class. For this example, the class should probably have "type" and "message" fields. Presumably you would insert new event objects using code which is constantly getting information from the server log (either reading a file, through REST, or whatever).
In order to do time based logic you can use cron expressions. You can also use Calendar in more recent versions of drools. This is a brief example of doing it with cron.