/**
* 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.io.InputStream;
import java.io.Reader;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.apache.camel.Exchange;
import org.apache.camel.Message;
import org.apache.camel.impl.DefaultProducer;
import org.atmosphere.websocket.WebSocket;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*
*/
public class WebsocketProducer extends DefaultProducer {
private static final transient Logger LOG = LoggerFactory.getLogger(WebsocketProducer.class);
private static ExecutorService executor = Executors.newSingleThreadExecutor();
public WebsocketProducer(WebsocketEndpoint endpoint) {
super(endpoint);
}
@Override
public WebsocketEndpoint getEndpoint() {
return (WebsocketEndpoint) super.getEndpoint();
}
@Override
public void process(Exchange exchange) throws Exception {
Message in = exchange.getIn();
//TODO support binary data
Object message = in.getBody();
if (message == null) {
LOG.info("Ignoring a null message");
return;
}
if (!(message instanceof String || message instanceof byte[]
|| message instanceof Reader || message instanceof InputStream)) {
// fallback to use String
if (LOG.isInfoEnabled()) {
LOG.info("Using String for unexpected message type {} ", message.getClass());
}
message = in.getBody(String.class);
}
// REVISIT Reader and InputStream handling at Producer
// special conversion for Reader and InputStream for now
if (message instanceof Reader) {
message = in.getBody(String.class);
} else if (message instanceof InputStream) {
message = in.getBody(byte[].class);
}
log.debug("Sending to {}", message);
if (getEndpoint().isSendToAll()) {
log.debug("Sending to all -> {}", message);
//TODO consider using atmosphere's broadcast or a more configurable async send
for (final WebSocket websocket : getEndpoint().getWebSocketStore().getAllWebSockets()) {
final Object msg = message;
executor.execute(new Runnable() {
@Override
public void run() {
sendMessage(websocket, msg);
}
});
}
} else {
// look for connection key and get Websocket
String connectionKey = in.getHeader(WebsocketConstants.CONNECTION_KEY, String.class);
if (connectionKey != null) {
WebSocket websocket = getEndpoint().getWebSocketStore().getWebSocket(connectionKey);
log.debug("Sending to connection key {} -> {}", connectionKey, message);
sendMessage(websocket, message);
} else {
throw new IllegalArgumentException("Failed to send message to single connection; connetion key not set.");
}
}
}
private void sendMessage(WebSocket websocket, Object message) {
try {
if (message instanceof String) {
websocket.write((String)message);
} else if (message instanceof byte[]) {
websocket.write((byte[])message, 0, ((byte[])message).length);
} else {
// this should not happen unless one of the supported types is missing above.
LOG.error("unexpected message type {}", message == null ? null : message.getClass());
}
} catch (Exception e) {
LOG.error("Error when writing to websocket", e);
}
}
}