Generic Chainable Batch

README.md

Create a class which implements Action interface, And pass List of actions as below. Database.executeBatch(new ActionBatch(listOfActions,0));

Action.cls

interface Action {
    String getQuery();
    Boolean execute(List<SObject> records);
    Object getResult();
    void setData(Object value);
    Integer getDelay();
    String getJobName();  
}

ActionBatch.cls

public class ActionBatch implements Batchable<SObject>{
    
    List<Action> actions;
    Integer index;
    Boolean isSuccess;
    //Object state;  if state is required across multiple invocations
    
    public ActionBatch(List<Action> theActions,Integer currentIndex){
        this.actions = theActions;
        index=currentIndex;
    }
    
	public database.querylocator start(Database.BatchableContext BC) {
      Database.getQueryLocator(actions.get(index).getQuery())
    }
     
    public void execute(Database.BatchableContext BC, List<sObject> scope) {
        isSuccess = actions.get(index).execute(scope);
	//actions.get(index).setState(state); to maintain state
    }
     
    public void finish(Database.BatchableContext BC){
        
	if( isSuccess ){
		Integer nextIndex = index+1;
		Object result = actions.get(index).getData();
		Action nextAction = actions.get(nextIndex);
		nextAction.setData(result);
		System.scheduleBatch( new ActionBatch(actions, nextIndex), nextAction.getJobName() , nextAction.getDelay());
        }   
    }
}