/*
 * Copyright 2013-2016 consulo.io
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package consulo.web.gwt.client.service;

import com.google.gwt.user.client.rpc.AsyncCallback;
import consulo.web.gwt.client.util.Log;

/**
 * @author VISTALL
 * @since 20-May-16
 */
public interface FetchService {
  abstract class ServiceCallback<T> implements AsyncCallback<T> {
    private Runnable myOnError;
    private Runnable myOnOk;

    ServiceCallback(Runnable onError, Runnable onOk) {
      myOnError = onError;
      myOnOk = onOk;
    }
    @Override
    public void onFailure(Throwable caught) {
      String string = caught.getMessage() + "\n";
      for (StackTraceElement element : caught.getStackTrace()) {
        string += element + "\n";
      }

      Log.log(string);
      myOnError.run();
    }

    @Override
    public void onSuccess(T result) {
      handle(result);

      myOnOk.run();
    }

    public abstract void handle(T result);
  }

  void fetch(Runnable onError, Runnable onOk);

  String getKey();
}