Why static map does not retain the value in future methods?

Question

I have declared a map as a instance variable like this:

public class JSONParser_GET {
     public static Map<String, String> mapOfValues= new Map<String,String>();
 ...

Now, I have a future method where I am adding the values to this map:

@future(callout=true)
public static void getRequest(String type,String e,String authHeader){
    mapOfValues.put(type,lookupname);
    ...

But the values are not available when I try to access it in different method. Isn't that is what static is supposed to do? As I am declaring it as static instance variable it should be globally available. I tried to use global keyword as well. But that also doesn't seems to work. Any help is appreciated

Answer 1

So, here is what I did.. It seems future methods may execute in parallel due to which it is not possible to get the values from the response in one Map itself. So I wrote a method before the getRequest and made it as future so that I can make only one instance of future handler.

@future(callout==true) public class JSONParser_GET { public static Map<String, String> mapOfValues= new Map<String,String>(); getRequest() getRequest() getRequest() }

public void getRequest{...}