Consolidate STOMP WebSocketHandler class hierarchy
This commit is contained in:
Rossen Stoyanchev
parent
ad41f095a1
commit
82dfd781d0
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@ -1,100 +0,0 @@
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/*
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* Copyright 2002-2013 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.web.messaging.stomp.socket;
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import java.nio.charset.Charset;
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import java.util.Map;
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import java.util.concurrent.ConcurrentHashMap;
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import org.springframework.messaging.GenericMessage;
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import org.springframework.messaging.Message;
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import org.springframework.web.messaging.stomp.StompCommand;
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import org.springframework.web.messaging.stomp.StompHeaders;
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import org.springframework.web.messaging.stomp.support.StompMessageConverter;
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import org.springframework.web.socket.CloseStatus;
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import org.springframework.web.socket.TextMessage;
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import org.springframework.web.socket.WebSocketSession;
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import org.springframework.web.socket.adapter.TextWebSocketHandlerAdapter;
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/**
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* @author Rossen Stoyanchev
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* @since 4.0
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*/
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public abstract class AbstractStompWebSocketHandler extends TextWebSocketHandlerAdapter {
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private final StompMessageConverter stompMessageConverter = new StompMessageConverter();
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private final Map<String, WebSocketSession> sessions = new ConcurrentHashMap<String, WebSocketSession>();
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public StompMessageConverter getStompMessageConverter() {
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return this.stompMessageConverter;
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}
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protected WebSocketSession getWebSocketSession(String sessionId) {
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return this.sessions.get(sessionId);
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}
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@Override
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public void afterConnectionEstablished(WebSocketSession session) throws Exception {
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this.sessions.put(session.getId(), session);
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}
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@Override
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protected void handleTextMessage(WebSocketSession session, TextMessage textMessage) {
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try {
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String payload = textMessage.getPayload();
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Message<byte[]> message = this.stompMessageConverter.toMessage(payload, session.getId());
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// TODO: validate size limits
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// http://stomp.github.io/stomp-specification-1.2.html#Size_Limits
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handleStompMessage(session, message);
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// TODO: send RECEIPT message if incoming message has "receipt" header
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// http://stomp.github.io/stomp-specification-1.2.html#Header_receipt
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}
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catch (Throwable error) {
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sendErrorMessage(session, error);
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}
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}
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protected void sendErrorMessage(WebSocketSession session, Throwable error) {
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StompHeaders stompHeaders = StompHeaders.create(StompCommand.ERROR);
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stompHeaders.setMessage(error.getMessage());
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Message<byte[]> errorMessage = new GenericMessage<byte[]>(new byte[0], stompHeaders.toMessageHeaders());
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byte[] bytes = this.stompMessageConverter.fromMessage(errorMessage);
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try {
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session.sendMessage(new TextMessage(new String(bytes, Charset.forName("UTF-8"))));
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}
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catch (Throwable t) {
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// ignore
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}
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}
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protected abstract void handleStompMessage(WebSocketSession session, Message<byte[]> message);
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@Override
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public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception {
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this.sessions.remove(session.getId());
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}
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}
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@ -1,196 +0,0 @@
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/*
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* Copyright 2002-2013 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.web.messaging.stomp.socket;
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import java.io.IOException;
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import java.nio.charset.Charset;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.springframework.http.MediaType;
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import org.springframework.messaging.GenericMessage;
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import org.springframework.messaging.Message;
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import org.springframework.web.messaging.MessageType;
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import org.springframework.web.messaging.converter.CompositeMessageConverter;
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import org.springframework.web.messaging.converter.MessageConverter;
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import org.springframework.web.messaging.event.EventBus;
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import org.springframework.web.messaging.event.EventConsumer;
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import org.springframework.web.messaging.service.AbstractMessageService;
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import org.springframework.web.messaging.stomp.StompCommand;
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import org.springframework.web.messaging.stomp.StompConversionException;
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import org.springframework.web.messaging.stomp.StompHeaders;
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import org.springframework.web.socket.CloseStatus;
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import org.springframework.web.socket.TextMessage;
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import org.springframework.web.socket.WebSocketSession;
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/**
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* @author Gary Russell
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* @author Rossen Stoyanchev
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* @since 4.0
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*/
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public class DefaultStompWebSocketHandler extends AbstractStompWebSocketHandler {
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private static Log logger = LogFactory.getLog(DefaultStompWebSocketHandler.class);
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private final EventBus eventBus;
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private MessageConverter payloadConverter = new CompositeMessageConverter(null);
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public DefaultStompWebSocketHandler(EventBus eventBus) {
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this.eventBus = eventBus;
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this.eventBus.registerConsumer(AbstractMessageService.SERVER_TO_CLIENT_MESSAGE_KEY,
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new EventConsumer<Message<?>>() {
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@Override
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public void accept(Message<?> message) {
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StompHeaders stompHeaders = StompHeaders.fromMessageHeaders(message.getHeaders());
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stompHeaders.setStompCommandIfNotSet(StompCommand.MESSAGE);
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if (StompCommand.CONNECTED.equals(stompHeaders.getStompCommand())) {
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// Ignore for now since we already sent it
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return;
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}
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String sessionId = stompHeaders.getSessionId();
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if (sessionId == null) {
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logger.error("Cannot send message without a session id: " + message);
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}
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WebSocketSession session = getWebSocketSession(sessionId);
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byte[] payload;
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try {
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MediaType contentType = stompHeaders.getContentType();
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payload = payloadConverter.convertToPayload(message.getPayload(), contentType);
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}
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catch (Exception e) {
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logger.error("Failed to send " + message, e);
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return;
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}
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try {
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Map<String, Object> messageHeaders = stompHeaders.toMessageHeaders();
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Message<byte[]> byteMessage = new GenericMessage<byte[]>(payload, messageHeaders);
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byte[] bytes = getStompMessageConverter().fromMessage(byteMessage);
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session.sendMessage(new TextMessage(new String(bytes, Charset.forName("UTF-8"))));
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}
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catch (Throwable t) {
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sendErrorMessage(session, t);
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}
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finally {
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if (StompCommand.ERROR.equals(stompHeaders.getStompCommand())) {
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try {
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session.close(CloseStatus.PROTOCOL_ERROR);
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}
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catch (IOException e) {
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}
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}
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}
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}
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});
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}
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public void setMessageConverters(List<MessageConverter> converters) {
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this.payloadConverter = new CompositeMessageConverter(converters);
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}
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public void handleStompMessage(final WebSocketSession session, Message<byte[]> message) {
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if (logger.isTraceEnabled()) {
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logger.trace("Processing STOMP message: " + message);
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}
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try {
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StompHeaders stompHeaders = StompHeaders.fromMessageHeaders(message.getHeaders());
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MessageType messageType = stompHeaders.getMessageType();
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if (MessageType.CONNECT.equals(messageType)) {
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handleConnect(session, message);
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}
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else if (MessageType.MESSAGE.equals(messageType)) {
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handleMessage(message);
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}
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else if (MessageType.SUBSCRIBE.equals(messageType)) {
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handleSubscribe(message);
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}
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else if (MessageType.UNSUBSCRIBE.equals(messageType)) {
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handleUnsubscribe(message);
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}
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else if (MessageType.DISCONNECT.equals(messageType)) {
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handleDisconnect(message);
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}
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this.eventBus.send(AbstractMessageService.CLIENT_TO_SERVER_MESSAGE_KEY, message);
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}
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catch (Throwable t) {
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logger.error("Terminating STOMP session due to failure to send message: ", t);
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sendErrorMessage(session, t);
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}
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}
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protected void handleConnect(final WebSocketSession session, Message<byte[]> message) throws IOException {
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StompHeaders connectStompHeaders = StompHeaders.fromMessageHeaders(message.getHeaders());
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StompHeaders connectedStompHeaders = StompHeaders.create(StompCommand.CONNECTED);
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Set<String> acceptVersions = connectStompHeaders.getAcceptVersion();
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if (acceptVersions.contains("1.2")) {
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connectedStompHeaders.setAcceptVersion("1.2");
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}
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else if (acceptVersions.contains("1.1")) {
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connectedStompHeaders.setAcceptVersion("1.1");
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}
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else if (acceptVersions.isEmpty()) {
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// 1.0
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}
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else {
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throw new StompConversionException("Unsupported version '" + acceptVersions + "'");
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}
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connectedStompHeaders.setHeartbeat(0,0); // TODO
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// TODO: security
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Message<byte[]> connectedMessage = new GenericMessage<byte[]>(new byte[0], connectedStompHeaders.toMessageHeaders());
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byte[] bytes = getStompMessageConverter().fromMessage(connectedMessage);
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session.sendMessage(new TextMessage(new String(bytes, Charset.forName("UTF-8"))));
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}
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protected void handleSubscribe(Message<byte[]> message) {
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// TODO: need a way to communicate back if subscription was successfully created or
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// not in which case an ERROR should be sent back and close the connection
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// http://stomp.github.io/stomp-specification-1.2.html#SUBSCRIBE
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}
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protected void handleUnsubscribe(Message<byte[]> message) {
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}
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protected void handleMessage(Message<byte[]> stompMessage) {
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}
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protected void handleDisconnect(Message<byte[]> stompMessage) {
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}
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@Override
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public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception {
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eventBus.send(AbstractMessageService.CLIENT_CONNECTION_CLOSED_KEY, session.getId());
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}
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}
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@ -0,0 +1,249 @@
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/*
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* Copyright 2002-2013 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.web.messaging.stomp.support;
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import java.io.IOException;
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import java.nio.charset.Charset;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import java.util.concurrent.ConcurrentHashMap;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.springframework.http.MediaType;
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import org.springframework.messaging.GenericMessage;
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import org.springframework.messaging.Message;
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import org.springframework.web.messaging.MessageType;
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import org.springframework.web.messaging.converter.CompositeMessageConverter;
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import org.springframework.web.messaging.converter.MessageConverter;
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import org.springframework.web.messaging.event.EventBus;
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import org.springframework.web.messaging.event.EventConsumer;
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import org.springframework.web.messaging.service.AbstractMessageService;
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import org.springframework.web.messaging.stomp.StompCommand;
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import org.springframework.web.messaging.stomp.StompConversionException;
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import org.springframework.web.messaging.stomp.StompHeaders;
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import org.springframework.web.socket.CloseStatus;
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import org.springframework.web.socket.TextMessage;
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import org.springframework.web.socket.WebSocketSession;
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import org.springframework.web.socket.adapter.TextWebSocketHandlerAdapter;
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/**
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* @author Rossen Stoyanchev
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* @since 4.0
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*/
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public class StompWebSocketHandler extends TextWebSocketHandlerAdapter {
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private static Log logger = LogFactory.getLog(StompWebSocketHandler.class);
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private final StompMessageConverter stompMessageConverter = new StompMessageConverter();
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private final Map<String, WebSocketSession> sessions = new ConcurrentHashMap<String, WebSocketSession>();
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private final EventBus eventBus;
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private MessageConverter payloadConverter = new CompositeMessageConverter(null);
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public StompWebSocketHandler(EventBus eventBus) {
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this.eventBus = eventBus;
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this.eventBus.registerConsumer(AbstractMessageService.SERVER_TO_CLIENT_MESSAGE_KEY,
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new ClientMessageConsumer());
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}
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public void setMessageConverters(List<MessageConverter> converters) {
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this.payloadConverter = new CompositeMessageConverter(converters);
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}
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public StompMessageConverter getStompMessageConverter() {
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return this.stompMessageConverter;
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}
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protected WebSocketSession getWebSocketSession(String sessionId) {
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return this.sessions.get(sessionId);
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}
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@Override
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public void afterConnectionEstablished(WebSocketSession session) throws Exception {
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this.sessions.put(session.getId(), session);
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}
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@Override
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protected void handleTextMessage(WebSocketSession session, TextMessage textMessage) {
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try {
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String payload = textMessage.getPayload();
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Message<byte[]> message = this.stompMessageConverter.toMessage(payload, session.getId());
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// TODO: validate size limits
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// http://stomp.github.io/stomp-specification-1.2.html#Size_Limits
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if (logger.isTraceEnabled()) {
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logger.trace("Processing STOMP message: " + message);
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}
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try {
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StompHeaders stompHeaders = StompHeaders.fromMessageHeaders(message.getHeaders());
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MessageType messageType = stompHeaders.getMessageType();
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if (MessageType.CONNECT.equals(messageType)) {
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handleConnect(session, message);
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}
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else if (MessageType.MESSAGE.equals(messageType)) {
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handleMessage(message);
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}
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else if (MessageType.SUBSCRIBE.equals(messageType)) {
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handleSubscribe(message);
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}
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else if (MessageType.UNSUBSCRIBE.equals(messageType)) {
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handleUnsubscribe(message);
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}
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else if (MessageType.DISCONNECT.equals(messageType)) {
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handleDisconnect(message);
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}
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this.eventBus.send(AbstractMessageService.CLIENT_TO_SERVER_MESSAGE_KEY, message);
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}
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catch (Throwable t) {
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logger.error("Terminating STOMP session due to failure to send message: ", t);
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sendErrorMessage(session, t);
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}
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// TODO: send RECEIPT message if incoming message has "receipt" header
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// http://stomp.github.io/stomp-specification-1.2.html#Header_receipt
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}
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catch (Throwable error) {
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sendErrorMessage(session, error);
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}
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}
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protected void handleConnect(final WebSocketSession session, Message<byte[]> message) throws IOException {
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StompHeaders connectStompHeaders = StompHeaders.fromMessageHeaders(message.getHeaders());
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StompHeaders connectedStompHeaders = StompHeaders.create(StompCommand.CONNECTED);
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Set<String> acceptVersions = connectStompHeaders.getAcceptVersion();
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if (acceptVersions.contains("1.2")) {
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connectedStompHeaders.setAcceptVersion("1.2");
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}
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else if (acceptVersions.contains("1.1")) {
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connectedStompHeaders.setAcceptVersion("1.1");
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}
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else if (acceptVersions.isEmpty()) {
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// 1.0
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}
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else {
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throw new StompConversionException("Unsupported version '" + acceptVersions + "'");
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}
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connectedStompHeaders.setHeartbeat(0,0); // TODO
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// TODO: security
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Message<byte[]> connectedMessage = new GenericMessage<byte[]>(new byte[0], connectedStompHeaders.toMessageHeaders());
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byte[] bytes = getStompMessageConverter().fromMessage(connectedMessage);
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session.sendMessage(new TextMessage(new String(bytes, Charset.forName("UTF-8"))));
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}
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protected void handleSubscribe(Message<byte[]> message) {
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// TODO: need a way to communicate back if subscription was successfully created or
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// not in which case an ERROR should be sent back and close the connection
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// http://stomp.github.io/stomp-specification-1.2.html#SUBSCRIBE
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}
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protected void handleUnsubscribe(Message<byte[]> message) {
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}
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protected void handleMessage(Message<byte[]> stompMessage) {
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}
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protected void handleDisconnect(Message<byte[]> stompMessage) {
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}
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protected void sendErrorMessage(WebSocketSession session, Throwable error) {
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StompHeaders stompHeaders = StompHeaders.create(StompCommand.ERROR);
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stompHeaders.setMessage(error.getMessage());
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||||
|
||||
Message<byte[]> errorMessage = new GenericMessage<byte[]>(new byte[0], stompHeaders.toMessageHeaders());
|
||||
byte[] bytes = this.stompMessageConverter.fromMessage(errorMessage);
|
||||
|
||||
try {
|
||||
session.sendMessage(new TextMessage(new String(bytes, Charset.forName("UTF-8"))));
|
||||
}
|
||||
catch (Throwable t) {
|
||||
// ignore
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception {
|
||||
this.sessions.remove(session.getId());
|
||||
eventBus.send(AbstractMessageService.CLIENT_CONNECTION_CLOSED_KEY, session.getId());
|
||||
}
|
||||
|
||||
|
||||
private final class ClientMessageConsumer implements EventConsumer<Message<?>> {
|
||||
|
||||
@Override
|
||||
public void accept(Message<?> message) {
|
||||
|
||||
StompHeaders stompHeaders = StompHeaders.fromMessageHeaders(message.getHeaders());
|
||||
stompHeaders.setStompCommandIfNotSet(StompCommand.MESSAGE);
|
||||
|
||||
if (StompCommand.CONNECTED.equals(stompHeaders.getStompCommand())) {
|
||||
// Ignore for now since we already sent it
|
||||
return;
|
||||
}
|
||||
|
||||
String sessionId = stompHeaders.getSessionId();
|
||||
if (sessionId == null) {
|
||||
logger.error("Cannot send message without a session id: " + message);
|
||||
}
|
||||
WebSocketSession session = getWebSocketSession(sessionId);
|
||||
|
||||
byte[] payload;
|
||||
try {
|
||||
MediaType contentType = stompHeaders.getContentType();
|
||||
payload = payloadConverter.convertToPayload(message.getPayload(), contentType);
|
||||
}
|
||||
catch (Exception e) {
|
||||
logger.error("Failed to send " + message, e);
|
||||
return;
|
||||
}
|
||||
|
||||
try {
|
||||
Map<String, Object> messageHeaders = stompHeaders.toMessageHeaders();
|
||||
Message<byte[]> byteMessage = new GenericMessage<byte[]>(payload, messageHeaders);
|
||||
byte[] bytes = getStompMessageConverter().fromMessage(byteMessage);
|
||||
session.sendMessage(new TextMessage(new String(bytes, Charset.forName("UTF-8"))));
|
||||
}
|
||||
catch (Throwable t) {
|
||||
sendErrorMessage(session, t);
|
||||
}
|
||||
finally {
|
||||
if (StompCommand.ERROR.equals(stompHeaders.getStompCommand())) {
|
||||
try {
|
||||
session.close(CloseStatus.PROTOCOL_ERROR);
|
||||
}
|
||||
catch (IOException e) {
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Reference in New Issue