Example of usage

publicclassAccountTriggerHandlerextendsTriggerHandler {    ...publicoverridevoidbeforeInsert() {super.beforeInsert();System.debug('Overriden beforeInsert method executed!');    }}

publicclassAccountTriggerHandlerMethod_1implementsCallable {publicObjectcall(Stringaction,Map<String,Object>args) {List<Account>accounts = (List<Account>)args.get('newList');System.debug('AccountTriggerHandlerMethod_1 class executed! ' +accounts.size() +' records passed. - Should be the first method called');returnnull;    }}publicclassAccountTriggerHandlerMethod_2implementsCallable {publicObjectcall(Stringaction,Map<String,Object>args) {List<Account>accounts = (List<Account>)args.get('newList');System.debug('AccountTriggerHandlerMethod_2 class executed! ' +accounts.size() +' records passed.');returnnull;    }}publicclassAccountTriggerHandlerMethod_3implementsCallable {publicObjectcall(Stringaction,Map<String,Object>args) {List<Account>accounts = (List<Account>)args.get('newList');System.debug('AccountTriggerHandlerMethod_3 class executed! ' +accounts.size() +' records passed. - Should be the last method called (before all overrides)');returnnull;    }}publicclassAccountTriggerHandlerMethod_4implementsCallable {publicObjectcall(Stringaction,Map<String,Object>args) {List<Account>accounts = (List<Account>)args.get('newList');System.debug('AccountTriggerHandlerMethod_4 class executed! ' +accounts.size() +' records passed.');returnnull;    }}publicclassAccountTriggerHandlerMethod_5implementsCallable {publicObjectcall(Stringaction,Map<String,Object>args) {List<Account>accounts = (List<Account>)args.get('newList');System.debug('AccountTriggerHandlerMethod_5 class executed! ' +accounts.size() +' records passed.');returnnull;    }}

Accountacc =newAccount();acc.Name ='Test';insertacc;

All needed classes and example handlers are included in this branch and can be used for other tests.