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/*
 * Copyright (C) 2018 Square, Inc.
 *
 * 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 okhttp3.sse;

import javax.annotation.Nullable;
import okhttp3.Response;

public abstract class EventSourceListener {
  /**
   * Invoked when an event source has been accepted by the remote peer and may begin transmitting
   * events.
   */
  public void onOpen(EventSource eventSource, Response response) {
  }

  /**
   * TODO description.
   */
  public void onEvent(EventSource eventSource, @Nullable String id, @Nullable String type,
      String data) {
  }

  /**
   * TODO description.
   * No further calls to this listener will be made.
   */
  public void onClosed(EventSource eventSource) {
  }

  /**
   * Invoked when an event source has been closed due to an error reading from or writing to the
   * network. Incoming events may have been lost. No further calls to this listener will be made.
   */
  public void onFailure(EventSource eventSource, @Nullable Throwable t,
      @Nullable Response response) {
  }
}