com.github.kpavlov.jreactive8583.client.Iso8583Client.kt Maven / Gradle / Ivy

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ISO8583 protocol client and server Netty connectors.
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@file:JvmName("Iso8583Client")

package com.github.kpavlov.jreactive8583.client

import com.github.kpavlov.jreactive8583.AbstractIso8583Connector
import com.github.kpavlov.jreactive8583.iso.MessageFactory
import com.github.kpavlov.jreactive8583.netty.pipeline.Iso8583ChannelInitializer
import com.github.kpavlov.jreactive8583.netty.pipeline.ReconnectOnCloseListener
import com.solab.iso8583.IsoMessage
import io.netty.bootstrap.Bootstrap
import io.netty.channel.Channel
import io.netty.channel.ChannelFuture
import io.netty.channel.socket.nio.NioSocketChannel
import java.net.InetSocketAddress
import java.net.SocketAddress
import java.util.concurrent.TimeUnit

public open class Iso8583Client(
    private var socketAddress: SocketAddress,
    config: ClientConfiguration,
    isoMessageFactory: MessageFactory,
) : AbstractIso8583Connector(config, isoMessageFactory) {
    private lateinit var reconnectOnCloseListener: ReconnectOnCloseListener

    /**
     * Connects synchronously to remote address.
     *
     * @return Returns the [ChannelFuture] which will be notified when this
     * channel is closed.
     * @throws InterruptedException if connection process was interrupted
     * @see .setSocketAddress
     */
    @Throws(InterruptedException::class)
    public fun connect(): ChannelFuture {
        val channel = connectAsync().sync().channel() ?: error("Channel must be set")
        return channel.closeFuture()
    }

    /**
     * Connect synchronously to  specified host and port.
     *
     * @param host A server host to connect to
     * @param port A server port to connect to
     * @return [ChannelFuture] which will be notified when connection is established.
     * @throws InterruptedException if connection process was interrupted
     */
    @Throws(InterruptedException::class)
    public fun connect(
        host: String,
        port: Int,
    ): ChannelFuture = connect(InetSocketAddress(host, port))

    /**
     * Connects synchronously to specified remote address.
     *
     * @param serverAddress A server address to connect to
     * @return [ChannelFuture] which will be notified when connection is established.
     * @throws InterruptedException if connection process was interrupted
     */
    @Throws(InterruptedException::class)
    public fun connect(serverAddress: SocketAddress): ChannelFuture {
        socketAddress = serverAddress
        return connect().sync()
    }

    /**
     * Connects asynchronously to remote address.
     *
     * @return Returns the [ChannelFuture] which will be notified when this
     * channel is active.
     */
    public fun connectAsync(): ChannelFuture {
        logger.debug("Connecting to {}", socketAddress)
        val b = bootstrap
        reconnectOnCloseListener.requestReconnect()
        val connectFuture = b.connect()
        connectFuture.addListener {
            if (!connectFuture.isSuccess) {
                reconnectOnCloseListener.scheduleReconnect()
                return@addListener
            }
            channel =
                with(connectFuture.channel()!!) {
                    logger.debug("Client is connected to {}", this.remoteAddress())
                    this.closeFuture().addListener(reconnectOnCloseListener)
                    this
                }
        }
        return connectFuture
    }

    public override fun createBootstrap(): Bootstrap {
        val b = Bootstrap()
        b
            .group(bossEventLoopGroup)
            .channel(NioSocketChannel::class.java)
            .remoteAddress(socketAddress)
            .handler(
                Iso8583ChannelInitializer(
                    configuration,
                    configurer,
                    workerEventLoopGroup,
                    isoMessageFactory as MessageFactory,
                    messageHandler,
                ),
            )
        configureBootstrap(b)
        b.validate()
        reconnectOnCloseListener =
            ReconnectOnCloseListener(
                this,
                configuration.reconnectInterval,
                bossEventLoopGroup,
            )
        return b
    }

    public fun disconnectAsync(): ChannelFuture? {
        reconnectOnCloseListener.requestDisconnect()
        val channel = channel
        logger.info("Closing connection to {}", socketAddress)
        return channel?.close()
    }

    @Throws(InterruptedException::class)
    public fun disconnect() {
        disconnectAsync()?.await()
    }

    /**
     * Sends asynchronously and returns a [ChannelFuture]
     *
     * @param isoMessage A message to send
     * @return ChannelFuture which will be notified when message is sent
     */
    public fun sendAsync(isoMessage: IsoMessage): ChannelFuture {
        val ch = channel
        check(ch != null && ch.isWritable) { "Channel is not writable" }
        return ch.writeAndFlush(isoMessage)
    }

    /**
     * Sends message synchronously
     */
    @Throws(InterruptedException::class)
    public fun send(isoMessage: IsoMessage) {
        sendAsync(isoMessage).sync().await()
    }

    /**
     * Sends message synchronously with timeout
     */
    @Throws(InterruptedException::class)
    public fun send(
        isoMessage: IsoMessage,
        timeout: Long,
        timeUnit: TimeUnit,
    ) {
        sendAsync(isoMessage).sync().await(timeout, timeUnit)
    }

    public val isConnected: Boolean
        get() {
            val channel = channel
            return channel != null && channel.isActive
        }
}