content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 org.apache.camel.component.atmosphere.websocket;
  
  import java.util.List;
  import java.util.UUID;
  
  import org.atmosphere.cpr.AtmosphereConfig;
  import org.atmosphere.cpr.AtmosphereRequest;
  import org.atmosphere.websocket.WebSocket;
  import org.atmosphere.websocket.WebSocketProcessor.WebSocketException;
  import org.atmosphere.websocket.WebSocketProtocol;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class WebsocketHandler implements WebSocketProtocol {
      private static final transient Logger LOG = LoggerFactory.getLogger(WebsocketHandler.class);
  
      protected WebsocketConsumer consumer;
      protected WebSocketStore store;
  
      @Override
      public void configure(AtmosphereConfig config) {
          // noop
      }
  
      @Override
      public void onClose(WebSocket webSocket) {
          LOG.debug("closing websocket");
          String connectionKey = store.getConnectionKey(webSocket);
          sendEventNotification(connectionKey, WebsocketConstants.ONCLOSE_EVENT_TYPE);
          store.removeWebSocket(webSocket);
          LOG.debug("websocket closed");
      }
  
      @Override
      public void onError(WebSocket webSocket, WebSocketException t) {
          LOG.error("websocket on error", t);
          String connectionKey = store.getConnectionKey(webSocket);
          sendEventNotification(connectionKey, WebsocketConstants.ONERROR_EVENT_TYPE);
      }
  
      @Override
      public void onOpen(WebSocket webSocket) {
          LOG.debug("opening websocket");
          String connectionKey = UUID.randomUUID().toString();
          store.addWebSocket(connectionKey, webSocket);
          sendEventNotification(connectionKey, WebsocketConstants.ONOPEN_EVENT_TYPE);
          LOG.debug("websocket opened");
      }
  
      @Override
      public List<AtmosphereRequest> onMessage(WebSocket webSocket, String data) {
          LOG.debug("processing text message {}", data);
          String connectionKey = store.getConnectionKey(webSocket);
          consumer.sendMessage(connectionKey, data);
          LOG.debug("text message sent");
          return null;
      }
  
      @Override
      public List<AtmosphereRequest> onMessage(WebSocket webSocket, byte[] data, int offset, int length) {
          LOG.debug("processing byte message {}", data);
          String connectionKey = store.getConnectionKey(webSocket);
          if (length < data.length) {
              // create a copy that contains the relevant section as camel expects bytes without offset.
              // alternatively, we could pass a BAIS reading this byte array from the offset.
              byte[] rawdata = data;
              data = new byte[length];
              System.arraycopy(rawdata, offset, data, 0, length);
          }
          consumer.sendMessage(connectionKey, data);
          LOG.debug("byte message sent");
          return null;
      }
  
      public void setConsumer(WebsocketConsumer consumer) {
          this.consumer = consumer;
          this.store = consumer.getEndpoint().getWebSocketStore();
      }
  
      private void sendEventNotification(final String connectionKey, final int eventType) {
          if (consumer.isEnableEventsResending()) {
              consumer.sendEventNotification(connectionKey, eventType);
          }
      }
  }
  