ratpack.websocket.WebSockets.java Source code

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Here is the source code for ratpack.websocket.WebSockets.java

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/*
 * Copyright 2013 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 ratpack.websocket;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.netty.buffer.ByteBufUtil;
import io.netty.util.CharsetUtil;
import org.reactivestreams.Publisher;
import ratpack.func.Function;
import ratpack.handling.Context;
import ratpack.server.ServerConfig;
import ratpack.stream.Streams;
import ratpack.websocket.internal.DefaultWebSocketConnector;
import ratpack.websocket.internal.WebSocketEngine;
import ratpack.websocket.internal.WebsocketBroadcastSubscriber;

import java.nio.CharBuffer;

public abstract class WebSockets {

    public static <T> WebSocketConnector<T> websocket(Context context, Function<WebSocket, T> openAction) {
        return new DefaultWebSocketConnector<>(context, openAction);
    }

    public static void websocket(Context context, WebSocketHandler<?> handler) {
        WebSocketEngine.connect(context, "/", context.get(ServerConfig.class).getMaxContentLength(), handler);
    }

    public static void websocketBroadcast(final Context context, final Publisher<String> broadcaster) {
        ByteBufAllocator bufferAllocator = context.get(ByteBufAllocator.class);
        websocketByteBufBroadcast(context, Streams.map(broadcaster,
                s -> ByteBufUtil.encodeString(bufferAllocator, CharBuffer.wrap(s), CharsetUtil.UTF_8)));
    }

    public static void websocketByteBufBroadcast(final Context context, final Publisher<ByteBuf> broadcaster) {
        websocket(context, new AutoCloseWebSocketHandler<AutoCloseable>() {
            @Override
            public AutoCloseable onOpen(final WebSocket webSocket) throws Exception {
                WebsocketBroadcastSubscriber subscriber = new WebsocketBroadcastSubscriber(webSocket);
                context.stream(broadcaster).subscribe(subscriber);
                return subscriber;
            }
        });
    }
}