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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. All rights reserved.
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.apex.core.infrastructure.messaging.impl.ws.server;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.Collection;
import org.java_websocket.WebSocket;
import org.onap.policy.apex.core.infrastructure.messaging.MessageHolder;
import org.onap.policy.apex.core.infrastructure.messaging.util.MessagingUtils;
import org.slf4j.ext.XLogger;
import org.slf4j.ext.XLoggerFactory;
/**
* A messaging server implementation using web socket.
*
* @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
* @param <MESSAGE> the generic type of message being passed
*/
public class MessageServerImpl<MESSAGE> extends InternalMessageBusServer<MESSAGE> {
// The logger for this class
private static final XLogger LOGGER = XLoggerFactory.getXLogger(MessageServerImpl.class);
// The Web Socket protocol for URIs and URLs
private static final String PROTOCOL = "ws://";
// URI of this server
private final String connectionURI;
// Indicates if the web socket server is started or not
private boolean isStarted = false;
/**
* Instantiates a new web socket messaging server for Apex.
*
* @param address the address of the server machine on which to start the server
*/
public MessageServerImpl(final InetSocketAddress address) {
// Call the super class to create the web socket and set up received message forwarding
super(address);
LOGGER.entry(address);
// Compose the Web Socket URI
connectionURI = PROTOCOL + address.getHostString() + ":" + address.getPort();
LOGGER.debug("Server connection URI: {}", connectionURI);
LOGGER.exit();
}
/*
* (non-Javadoc)
*
* @see org.java_websocket.server.WebSocketServer#start()
*/
@Override
public void startConnection() {
// Start reception of connections on the web socket
start();
isStarted = true;
}
/*
* (non-Javadoc)
*
* @see org.java_websocket.server.WebSocketServer#stop()
*/
@Override
public void stopConnection() {
// Stop message listening using our super class
stopListener();
// Stop the web socket server
try {
// Close all connections on this web socket server
for (final WebSocket connection : connections()) {
connection.closeConnection(0, "");
}
stop();
} catch (final IOException ioe) {
LOGGER.catching(ioe);
} catch (final InterruptedException e) {
// restore the interrupt status
Thread.currentThread().interrupt();
// This can happen in normal operation so ignore
}
isStarted = false;
}
/**
* This method returns the current connection URI , if the server started otherwise it throws
* {@link IllegalStateException}.
*
* @return connection URI
*/
public String getConnectionURI() {
if (connectionURI == null) {
throw new IllegalStateException("URI not set - The server is not started");
}
return connectionURI;
}
/*
* (non-Javadoc)
*
* @see
* org.onap.policy.apex.core.infrastructure.messaging.MessagingService#send(org.onap.policy.apex
* .core. infrastructure. messaging.MessageHolder)
*/
@Override
public void send(final MessageHolder<MESSAGE> message) {
// Send the incoming message to all clients connected to this web socket
final Collection<WebSocket> connections = connections();
for (final WebSocket webSocket : connections) {
webSocket.send(MessagingUtils.serializeObject(message));
}
}
/*
* (non-Javadoc)
*
* @see
* org.onap.policy.apex.core.infrastructure.messaging.MessagingService#send(java.lang.String)
*/
@Override
public void send(final String messageString) {
final Collection<WebSocket> connections = connections();
for (final WebSocket webSocket : connections) {
webSocket.send(messageString);
}
}
/*
* (non-Javadoc)
*
* @see org.onap.policy.apex.core.infrastructure.messaging.MessagingService#isStarted()
*/
@Override
public boolean isStarted() {
return isStarted;
}
@Override
public void onStart() {
LOGGER.debug("started deployment server on URI: {}", connectionURI);
}
}
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