nifi-nar-bundles/nifi-extension-utils/nifi-event-transport/src/main/java/org/apache/nifi/event/transport/netty/StreamingNettyEventSenderFactory.java

/*
 * 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.nifi.event.transport.netty;

import io.netty.handler.stream.ChunkedWriteHandler;
import org.apache.nifi.event.transport.configuration.TransportProtocol;
import org.apache.nifi.event.transport.netty.channel.LogExceptionChannelHandler;
import org.apache.nifi.event.transport.netty.codec.InputStreamMessageEncoder;
import org.apache.nifi.logging.ComponentLog;

import java.io.InputStream;
import java.util.Arrays;

/**
 * Netty Event Sender Factory for messages in an InputStream
 */
public class StreamingNettyEventSenderFactory extends NettyEventSenderFactory<InputStream> {
    /**
     * Netty Event Sender Factory using InputStream. Uses a custom InputStreamMessageEncoder and a ChunkedWriteHandler.
     *
     * @param log Component Log
     * @param address Remote Address
     * @param port Remote Port Number
     * @param protocol Channel Protocol
     */
    public StreamingNettyEventSenderFactory(final ComponentLog log, final String address, final int port, final TransportProtocol protocol) {
        super(address, port, protocol);
        final LogExceptionChannelHandler logExceptionChannelHandler = new LogExceptionChannelHandler(log);
        final InputStreamMessageEncoder inputStreamMessageEncoder = new InputStreamMessageEncoder();

        setHandlerSupplier(() -> Arrays.asList(
                logExceptionChannelHandler,
                new ChunkedWriteHandler(),
                inputStreamMessageEncoder
        ));
    }
}