Instantiating an Apex class based on dynamic string name with Type class

Author Archives: Lin

Instantiating an Apex class based on dynamic string name with Type class

Somtimes we need to instantiate a Apex class by dynamic value in Salesforce, which can make our program more modular and more readable, such as the below case : 1. Each Contact has its socail fields : “Type__c” and “AccessToken__c” 2. Needs to request its profile via socail api in Apex First we need to […]

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Writing a Schedulable Batch Apex in Salesforce

To use batch Apex, you have to create an Apex class that implements interface Database.Batchable in Salesforce, like the following sample code: Execute batch Then you can use Database.executebatch method to execute it. Schedule Apex job To schedule your batch Apex to run at regular intervals, you also need an Apex class that implements interface […]

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Using Aggregate SOQL queries/results in Batch Apex

In previous post, we had created a schedulable batch apex that implements Database.Batchable<sObject> in Salesforce, but if you want to use SOQL having aggregate functions like SUM(), MAX(), COUNT() on results grouped by “GROUP BY” clause in start execution, changing to interface Database.Batchable<AggregateResult> isn’t a workable way, because it fails with the below compile error […]

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Zip attachments only with Apex in Salesforce

Before this post (about 2 years ago), I’d shared a post that is about how to zip attachments with JSZip and Apex in Salesforce, and recently I found a more simple way to do that thing, which is only using an Apex library named “Zippex” ( view on Github). Here is the outline of my […]

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To fix MIXED_DML_OPERATION error(setup and non-setup objects) in Salesforce

The following error will be occured if you’re trying to perform DML operation on both setup and non-setup objects in the same transation. ` MIXED_DML_OPERATION, DML operation on setup object is not permitted after you have updated a non-setup object (or vice versa): CustomObject__c, original object: User: [] ` Here is the sample code that […]

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Using HTML tag(e.g. line break) in Custom Label

Custom Label is a really useful feature in Salesforce, not only can be edited after deployed, but also can be used for making an app multilingual with Translation Workbench. If you want to use HTML tag with it on Visualforce Page, e.g. <br /> tag, the only thing you need to do is using an […]

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To Fix Error “Require TLS 1.1 for HTTPS connections” of MavensMate v6.0

Well, you may have found that MavensMate shows an error “Server raised fault: ‘UNSUPPORTED_CLIENT: TLS 1.0 has been disabled in this organization. Please use TLS 1.1 or higher when connecting to Salesforce using https.” as below, if you are using MavensMate v6.0 in Sublime Text 3,which is because Salesforce disabled TLS 1.0 encryption recently, for […]

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