import android.content.Context;

import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.toolbox.Volley;

public class RequestManager {

    // Singleton
    private static RequestManager mInstance = new RequestManager();

    private RequestManager() {
    }

    private boolean mIsInitialzed = false;
    private RequestQueue mReqQueue = null;

    public static RequestManager getInstance() {
        return mInstance;
    }

    public void init(Context context) {
        if (!mIsInitialzed) {
            mReqQueue = Volley.newRequestQueue(context);

            mIsInitialzed = true;
        }
    }

    public void destroy() {
        mIsInitialzed = false;

        if (mReqQueue != null) {
            mReqQueue.stop();
            mReqQueue = null;
        }
    }

    public Request<?> addRequest(Request<?> request) {
        if (mReqQueue != null) {
            return mReqQueue.add(request);
        }
        return null;
    }

    public void cancelRequest(Request<?> request) {
        request.cancel();
    }
}