/*
* Copyright 2014 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 com.bearchoke.platform.tests.web.websocket.support.client;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageHeaders;
import org.springframework.messaging.converter.MappingJackson2MessageConverter;
import org.springframework.messaging.converter.MessageConverter;
import org.springframework.messaging.simp.stomp.StompCommand;
import org.springframework.messaging.simp.stomp.StompEncoder;
import org.springframework.messaging.simp.stomp.StompHeaderAccessor;
import org.springframework.messaging.support.MessageBuilder;
import org.springframework.util.Assert;
import org.springframework.web.socket.TextMessage;
import org.springframework.web.socket.WebSocketSession;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.concurrent.atomic.AtomicInteger;
public class WebSocketStompSession implements StompSession {
private static final Charset UTF_8 = Charset.forName("UTF-8");
public static final byte[] EMPTY_PAYLOAD = new byte[0];
private final String id;
private final WebSocketSession webSocketSession;
private final MessageConverter messageConverter;
private final StompEncoder encoder = new StompEncoder();
private final AtomicInteger subscriptionIndex = new AtomicInteger();
public WebSocketStompSession(WebSocketSession delegate) {
this(delegate, new MappingJackson2MessageConverter());
}
public WebSocketStompSession(WebSocketSession webSocketSession, MessageConverter messageConverter) {
Assert.notNull(webSocketSession);
Assert.notNull(messageConverter);
this.id = webSocketSession.getId();
this.webSocketSession = webSocketSession;
this.messageConverter = messageConverter;
}
public void subscribe(String destination, String receiptId) {
StompHeaderAccessor headers = StompHeaderAccessor.create(StompCommand.SUBSCRIBE);
headers.setSubscriptionId("sub" + this.subscriptionIndex.getAndIncrement());
headers.setDestination(destination);
if (receiptId != null) {
headers.setReceipt(receiptId);
}
sendInternal(MessageBuilder.withPayload(EMPTY_PAYLOAD).setHeaders(headers).build());
}
public void send(String destination, Object payload) {
StompHeaderAccessor headers = StompHeaderAccessor.create(StompCommand.SEND);
headers.setDestination(destination);
sendInternal((Message<byte[]>)this.messageConverter.toMessage(payload, new MessageHeaders(headers.toMap())));
}
public void disconnect() {
StompHeaderAccessor headers = StompHeaderAccessor.create(StompCommand.DISCONNECT);
Message<byte[]> message = MessageBuilder.withPayload(EMPTY_PAYLOAD).setHeaders(headers).build();
sendInternal(message);
try {
this.webSocketSession.close();
}
catch (IOException e) {
throw new IllegalStateException(e);
}
}
private void sendInternal(Message<byte[]> message) {
byte[] bytes = this.encoder.encode(message);
try {
this.webSocketSession.sendMessage(new TextMessage(new String(bytes, UTF_8)));
}
catch (IOException e) {
throw new IllegalStateException(e);
}
}
@Override
public String toString() {
return this.webSocketSession.toString();
}
}