How is a singleton pattern used in design?
This pattern involves a single class which is responsible to create an object while making sure that only single object gets created. This class provides a way to access its only object which can be accessed directly without need to instantiate the object of the class. We’re going to create a SingleObject class.
How are configuration classes implemented as a singleton?
By implementing configuration classes as Singleton not only that we provide a global access point, but we also keep the instance we use as a cache object. When the class is instantiated( or when a value is read ) the singleton will keep the values in its internal structure.
How to create a singleton class in Java?
SingleObject class provides a static method to get its static instance to outside world. SingletonPatternDemo, our demo class will use SingleObject class to get a SingleObject object. Create a Singleton Class. SingleObject.java
What should I change in my singleton class?
The only piece of code that needs changing is the body of the getInstance method. Add a private static field to the class for storing the singleton instance. Declare a public static creation method for getting the singleton instance. Implement “lazy initialization” inside the static method.
How to cache a record type ID in apex?
First off, if you’re hitting SOQL limits because of a single record type query, then you have many other issues that you should be dealing with first. Secondly, for record types and other ids that I’ll be re-using through out Apex, I will throw them in a custom setting and cache them, using logic similar to:
How to get the account sobjecttype in apex?
// Get all Active Account RecordTypes that are available to the running user Map accountTypes = Utils.GetRecordTypeIdsByDeveloperName (Account.SObjectType); for (Account a : Trigger.new) { // ATTEMPT to assign a different RecordType to this Account // if it has tons of employees.