[SOLUTION] Re: Create custom callbacks to achieve synchronous code execution

Use code like:

    RunAsyncCallback getResourceItems = new RunAsyncCallback() {

        @Override

        public void onFailure(Throwable reason) {

            GWT.log(reason.getMessage());

        }

        @Override

        public void onSuccess() {

            System.out.println("THIRD");

            System.out.println("==============");

            getSlotsOfDate();

            getSessionsOfUserAndDate();

        }

    };

    RunAsyncCallback clearView = new RunAsyncCallback() {

        @Override

        public void onFailure(Throwable reason) {

            GWT.log(reason.getMessage());

        }

        @Override

        public void onSuccess() {

            Common.clearView(mainPanel);

            System.out.println("SECOND");

            GWT.runAsync(getResourceItems);

        }

    };

    private void refreshView() {

        System.out.println("FIRST");

        GWT.runAsync(clearView);

        System.out.println("LAST");

    }

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