MassUpdateContactsHelper.apex
Force.com Cookbook Sample Code
Chapter 4: Best Practices for Writing Apex - Avoiding Apex Governor Limits
To download all the code samples, access the Cookbook. - 
This Apex trigger is part of an example that demonstrates several methods for avoiding execution governor limits, including:
- Making sure that database statements such as
insert(), update(), and delete()operate in bulk - Using
Limits.getDMLRows()for error handling - Limiting queries by using static class variables to store query results
- Testing bulk behavior
public class MassUpdateContactsHelper {
//Static variables are local to the context of a Web request
//or testMethod during a runTests call.
//Therefore, we can set this static variable in the before
//trigger when we validate, and insert the proporsed changes
//during the after trigger
private static List<Contact> contactsToRemember = null;
public static void rememberContactsForUpdate(List<Contact> contacts) {
contactsToRemember = contacts;
}
public static List<Contact> getContactsForUpdate() {
return contactsToRemember;
}
}
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