Pass IDs from apex controller to an apex batch class

Question

Can I pass IDs from apex controller to apex batch class?

Can someone please show me some examples? Can't find in google search. I need just a reverse of below link. https://developer.salesforce.com/forums/?id=906F000000096KeIAI

Answer 1

For example, you have:

1. Base (Apex Class) and a variable storeID (where you stored the ID/s)
2. Group (Batch Class) and a variable passedID

Base

inside the method calling the batch

Group grp = new Group(storeID);
Database.executeBatch(grp);

Group

public Group(*variable type* storeID)
{
passedID = storeID;
}

Answer 2

You can create variable in you batch class something like " global List<Id> currentId ;" and from your main class set the value of this variable using class instance and then use this variable in your batch class. It works fine for you. Here is a example

public class batchclass implements Database.Batchable<sObject>{

global List<Id> currentId ;

// Start Method
        global Database.QueryLocator start(Database.BatchableContext BC){

                return Database.getQueryLocator('SELECT Id,Name FROM Opportunity WHERE Id in :currentId and Type in : oppTypes ');
        }
}

and your main class

public class mainclass { 
public void somemethod() {
batchclass bat = new batchclass ();
bat.currentId =  opptyId ;
database.executeBatch(bat,2) ;
}

}