Lamda Expression in .NET Getter Chain

Harrison_Clark — Tue, 21 May 2019 13:15:56 GMT

Is it possible to use a lamda expression in a .NET getter chain for a data collector? I have a List of objects that I would like to call Find on and pass a lamda to get the one I need.

Basically I want to call this:

Actions.Find(x => x.ActionType == ActionType.Settle).ResultMessage

But I'm not sure what the syntax for the getter chain should be in this case (or if it's even possible). Any ideas?

Re: Lamda Expression in .NET Getter Chain

Yusuke_Miyahara — Thu, 20 Feb 2020 05:32:47 GMT

Hello Harrison,

Thank you for reaching out to the community.

We do not support for Linq query with lambda expression in data collector/information point getter chain.

Apologies for the inconvenience. The workaround is to add the getter method that returns the evaluated value,
and add data collector to this method. Please consult the following steps and the reference. (For example, it is assumed that getActionType and getResultMessage are implemented.)

Steps:
1. Go Configuration > Instrumentation in your SaaS controller web page.
2. Click the Data Collector tab and click the Add button below the Method Invocation Data Collectors panel.
3. Input the following fields and click the save button.

<Example>
Name: MyDataCollector
Class: with a class name that equals MyApplication.mynamespace.myclass
Method Name: Mymethod
Match Conditions:
Collect Data From : Method Parameter @index:0
Operation on Method Parameter: Use Getter Chain: getActionType()
Equals: Settle

4. Click the Add button below the Specify the Data to Collect from this Method Invocation panel.
5. Input the following fields and click the save button.

<Example>
Display Name: MyDataCollector
Collect Data From : Method Parameter @index:0
Operation on Method Parameter: Use Getter Chain: getResultMessage()

6. Click the save button.
7. You must wait one minute and restart the CLR for the changes to take effect.

Reference: https://docs.appdynamics.com/display/PRO45/Data+Collectors

Best regards,
Yusuke

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Lamda Expression in .NET Getter Chain

Re: Lamda Expression in .NET Getter Chain