/**
* 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.jooby.internal.jetty;
import static java.util.Objects.requireNonNull;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.StandardCharsets;
import java.util.Optional;
import java.util.function.BiConsumer;
import java.util.function.Consumer;
import org.eclipse.jetty.websocket.api.RemoteEndpoint;
import org.eclipse.jetty.websocket.api.Session;
import org.eclipse.jetty.websocket.api.SuspendToken;
import org.eclipse.jetty.websocket.api.WebSocketListener;
import org.eclipse.jetty.websocket.api.WriteCallback;
import org.jooby.WebSocket;
import org.jooby.WebSocket.OnError;
import org.jooby.WebSocket.SuccessCallback;
import org.jooby.spi.NativeWebSocket;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javaslang.control.Try;
public class JettyWebSocket implements NativeWebSocket, WebSocketListener {
private static final String A_CALLBACK_IS_REQUIRED = "A callback is required.";
private static final String NO_DATA_TO_SEND = "No data to send.";
/** The logging system. */
private final Logger log = LoggerFactory.getLogger(WebSocket.class);
private Session session;
private SuspendToken suspendToken;
private Runnable onConnectCallback;
private Consumer<String> onTextCallback;
private Consumer<ByteBuffer> onBinaryCallback;
private BiConsumer<Integer, Optional<String>> onCloseCallback;
private Consumer<Throwable> onErrorCallback;
@Override
public void close(final int status, final String reason) {
session.close(status, reason);
}
@Override
public void resume() {
if (suspendToken != null) {
suspendToken.resume();
suspendToken = null;
}
}
@Override
public void onConnect(final Runnable callback) {
this.onConnectCallback = requireNonNull(callback, A_CALLBACK_IS_REQUIRED);
}
@Override
public void onTextMessage(final Consumer<String> callback) {
this.onTextCallback = requireNonNull(callback, A_CALLBACK_IS_REQUIRED);
}
@Override
public void onBinaryMessage(final Consumer<ByteBuffer> callback) {
this.onBinaryCallback = requireNonNull(callback, A_CALLBACK_IS_REQUIRED);
}
@Override
public void onCloseMessage(final BiConsumer<Integer, Optional<String>> callback) {
this.onCloseCallback = requireNonNull(callback, A_CALLBACK_IS_REQUIRED);
}
@Override
public void onErrorMessage(final Consumer<Throwable> callback) {
this.onErrorCallback = requireNonNull(callback, A_CALLBACK_IS_REQUIRED);
}
@Override
public void pause() {
if (suspendToken == null) {
suspendToken = session.suspend();
}
}
@Override
public void terminate() throws IOException {
session.disconnect();
}
@Override
public void sendBytes(final ByteBuffer data, final SuccessCallback success,
final OnError err) {
requireNonNull(data, NO_DATA_TO_SEND);
RemoteEndpoint remote = session.getRemote();
remote.sendBytes(data, callback(log, success, err));
}
@Override
public void sendBytes(final byte[] data, final SuccessCallback success, final OnError err) {
requireNonNull(data, NO_DATA_TO_SEND);
sendBytes(ByteBuffer.wrap(data), success, err);
}
@Override
public void sendText(final String data, final SuccessCallback success, final OnError err) {
requireNonNull(data, NO_DATA_TO_SEND);
RemoteEndpoint remote = session.getRemote();
remote.sendString(data, callback(log, success, err));
}
@Override
public void sendText(final byte[] data, final SuccessCallback success, final OnError err) {
requireNonNull(data, NO_DATA_TO_SEND);
RemoteEndpoint remote = session.getRemote();
remote.sendString(new String(data, StandardCharsets.UTF_8), callback(log, success, err));
}
@Override
public void sendText(final ByteBuffer data, final SuccessCallback success,
final OnError err) {
requireNonNull(data, NO_DATA_TO_SEND);
RemoteEndpoint remote = session.getRemote();
CharBuffer buffer = StandardCharsets.UTF_8.decode(data);
// we need a TextFrame with ByteBuffer :(
remote.sendString(buffer.toString(), callback(log, success, err));
}
@Override
public boolean isOpen() {
return session.isOpen();
}
@Override
public void onWebSocketBinary(final byte[] payload, final int offset, final int len) {
this.onBinaryCallback.accept(ByteBuffer.wrap(payload, offset, len));
}
@Override
public void onWebSocketText(final String message) {
this.onTextCallback.accept(message);
}
@Override
public void onWebSocketClose(final int statusCode, final String reason) {
onCloseCallback.accept(statusCode, Optional.ofNullable(reason));
}
@Override
public void onWebSocketConnect(final Session session) {
this.session = session;
this.onConnectCallback.run();
}
@Override
public void onWebSocketError(final Throwable cause) {
this.onErrorCallback.accept(cause);
}
static WriteCallback callback(final Logger log, final SuccessCallback success,
final OnError err) {
requireNonNull(success, "Success callback is required.");
requireNonNull(err, "Error callback is required.");
WriteCallback callback = new WriteCallback() {
@Override
public void writeSuccess() {
Try.run(success::invoke)
.onFailure(cause -> log.error("Error while invoking success callback", cause));
}
@Override
public void writeFailed(final Throwable cause) {
Try.run(() -> err.onError(cause))
.onFailure(ex -> log.error("Error while invoking err callback", ex));
}
};
return callback;
}
}