Package org.springframework.web.socket.sockjs.transport.session

Source Code of org.springframework.web.socket.sockjs.transport.session.PollingSockJsSession

/*
* Copyright 2002-2013 the original author or authors.
*
* 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 org.springframework.web.socket.sockjs.transport.session;

import java.util.Map;

import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.sockjs.SockJsTransportFailureException;
import org.springframework.web.socket.sockjs.frame.SockJsFrame;
import org.springframework.web.socket.sockjs.frame.SockJsMessageCodec;
import org.springframework.web.socket.sockjs.transport.SockJsServiceConfig;

/**
* A SockJS session for use with polling HTTP transports.
*
* @author Rossen Stoyanchev
* @since 4.0
*/
public class PollingSockJsSession extends AbstractHttpSockJsSession {


  public PollingSockJsSession(String sessionId, SockJsServiceConfig config,
      WebSocketHandler wsHandler, Map<String, Object> attributes) {

    super(sessionId, config, wsHandler, attributes);
  }


  @Override
  protected boolean isStreaming() {
    return false;
  }

  @Override
  protected void flushCache() throws SockJsTransportFailureException {
    String[] messages = new String[getMessageCache().size()];
    for (int i = 0; i < messages.length; i++) {
      messages[i] = getMessageCache().poll();
    }
    SockJsMessageCodec messageCodec = getSockJsServiceConfig().getMessageCodec();
    SockJsFrame frame = SockJsFrame.messageFrame(messageCodec, messages);
    writeFrame(frame);
  }

}
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