org.apache.camel.component.mllp.internal.TcpServerBindThread Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of camel-mllp Show documentation
Camel MLLP Component
The newest version!
/*
 * 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.camel.component.mllp.internal;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.net.SocketException;
import java.time.Duration;

import org.apache.camel.Route;
import org.apache.camel.component.mllp.MllpTcpServerConsumer;
import org.apache.camel.spi.UnitOfWork;
import org.apache.camel.support.task.BlockingTask;
import org.apache.camel.support.task.Tasks;
import org.apache.camel.support.task.budget.Budgets;
import org.apache.camel.util.StringHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;

/**
 * Runnable to handle the ServerSocket.accept requests
 */
public class TcpServerBindThread extends Thread {
    private final Logger log = LoggerFactory.getLogger(this.getClass());
    private final MllpTcpServerConsumer consumer;

    public TcpServerBindThread(MllpTcpServerConsumer consumer) {
        this.consumer = consumer;

        // Get the URI without options
        String fullEndpointKey = consumer.getEndpoint().getEndpointKey();
        String endpointKey = StringHelper.before(fullEndpointKey, "?", fullEndpointKey);

        this.setName(String.format("%s - %s", this.getClass().getSimpleName(), endpointKey));
    }

    /**
     * Bind the TCP ServerSocket within the specified timeout.
     */
    @Override
    public void run() {
        MDC.put(UnitOfWork.MDC_CAMEL_CONTEXT_ID, consumer.getEndpoint().getCamelContext().getName());

        Route route = consumer.getRoute();
        if (route != null) {
            String routeId = route.getId();
            if (routeId != null) {
                MDC.put(UnitOfWork.MDC_ROUTE_ID, route.getId());
            }
        }

        try {
            // Note: this socket is going to be closed in the TcpServerAcceptThread instance
            // launched by the consumer
            ServerSocket serverSocket = new ServerSocket();
            InetSocketAddress socketAddress = setupSocket(serverSocket);

            log.debug("Attempting to bind to {}", socketAddress);

            doAccept(serverSocket, socketAddress);
        } catch (IOException ioEx) {
            log.error("Unexpected exception encountered initializing ServerSocket before attempting to bind", ioEx);
        }
    }

    private void doAccept(ServerSocket serverSocket, InetSocketAddress socketAddress) {
        BlockingTask task = Tasks.foregroundTask()
                .withBudget(Budgets.iterationTimeBudget()
                        .withMaxDuration(Duration.ofMillis(consumer.getConfiguration().getBindTimeout()))
                        .withInterval(Duration.ofMillis(consumer.getConfiguration().getBindRetryInterval()))
                        .build())
                .withName("mllp-tcp-server-accept")
                .build();

        if (task.run(() -> doBind(serverSocket, socketAddress))) {
            consumer.startAcceptThread(serverSocket);
        } else {
            log.error("Failed to bind to address {} within timeout {}", socketAddress,
                    consumer.getConfiguration().getBindTimeout());
        }
    }

    private boolean doBind(ServerSocket serverSocket, InetSocketAddress socketAddress) {
        try {
            if (consumer.getConfiguration().hasBacklog()) {
                serverSocket.bind(socketAddress, consumer.getConfiguration().getBacklog());
            } else {
                serverSocket.bind(socketAddress);
            }
            return true;
        } catch (IOException e) {
            log.warn("Failed to bind to address {} - retrying in {} milliseconds", socketAddress,
                    consumer.getConfiguration().getBindRetryInterval());

            return false;
        }
    }

    private InetSocketAddress setupSocket(ServerSocket serverSocket) throws SocketException {
        if (consumer.getConfiguration().hasReceiveBufferSize()) {
            serverSocket.setReceiveBufferSize(consumer.getConfiguration().getReceiveBufferSize());
        }

        if (consumer.getConfiguration().hasReuseAddress()) {
            serverSocket.setReuseAddress(consumer.getConfiguration().getReuseAddress());
        }

        // Accept Timeout
        serverSocket.setSoTimeout(consumer.getConfiguration().getAcceptTimeout());

        InetSocketAddress socketAddress;
        if (null == consumer.getEndpoint().getHostname()) {
            socketAddress = new InetSocketAddress(consumer.getEndpoint().getPort());
        } else {
            socketAddress = new InetSocketAddress(consumer.getEndpoint().getHostname(), consumer.getEndpoint().getPort());
        }
        return socketAddress;
    }

}