BinaryPartialEndpoint.java

/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2014 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * 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 io.undertow.websockets.jsr.test;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import jakarta.websocket.Endpoint;
import jakarta.websocket.EndpointConfig;
import jakarta.websocket.MessageHandler;
import jakarta.websocket.Session;

import io.undertow.testutils.DefaultServer;

/**
 * @author Andrej Golovnin
 */
public final class BinaryPartialEndpoint extends Endpoint {

    @Override
    public void onOpen(final Session session, EndpointConfig config) {
        session.addMessageHandler(new BinaryPartialMessageHandler(session));

    }

    private static class BinaryPartialMessageHandler implements MessageHandler.Partial<byte[]> {

        private final Session session;
        private ByteArrayOutputStream buffer;

        BinaryPartialMessageHandler(Session session) {
            this.session = session;
        }

        @Override
        public void onMessage(byte[] bytes, boolean last) {
            if (last) {
                if (buffer == null) {
                    onRequest(bytes);
                } else {
                    try {
                        buffer(bytes);
                        byte[] tmp = buffer.toByteArray();
                        onRequest(tmp);
                    } finally {
                        buffer = null;
                    }
                }
            } else {
                buffer(bytes);
            }
        }

        private void onRequest(final byte[] bytes) {
            // Just return the received bytes for the test
            DefaultServer.getWorker().execute(() -> {
                try {
                    session.getBasicRemote().sendBinary(
                            ByteBuffer.wrap(bytes));
                } catch (IOException e) {
                    throw new IllegalStateException(e);
                }
            });
        }

        private void buffer(byte[] data) {
            if (buffer == null) {
                buffer = new ByteArrayOutputStream(8096);
            }
            buffer.write(data, 0, data.length);
        }

    }
}