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/*
* This file is part of fabric-loom, licensed under the MIT License (MIT).
*
* Copyright (c) 2021 FabricMC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package net.fabricmc.loom.util.ipc;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.net.StandardProtocolFamily;
import java.net.UnixDomainSocketAddress;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.nio.charset.StandardCharsets;
import java.nio.file.Path;
import java.util.Scanner;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.function.Consumer;
public class IPCServer implements AutoCloseable {
private final ExecutorService loggerReceiverService = Executors.newSingleThreadExecutor();
private final Path path;
private final Consumer<String> consumer;
private final CountDownLatch startupLock = new CountDownLatch(1);
public IPCServer(Path path, Consumer<String> consumer) {
this.path = path;
this.consumer = consumer;
loggerReceiverService.submit(this::run);
try {
startupLock.await(10, TimeUnit.SECONDS);
} catch (InterruptedException e) {
throw new RuntimeException("Timed out waiting for IPC server thread to start", e);
}
}
public void run() {
UnixDomainSocketAddress address = UnixDomainSocketAddress.of(path);
try (ServerSocketChannel serverChannel = ServerSocketChannel.open(StandardProtocolFamily.UNIX)) {
serverChannel.bind(address);
startupLock.countDown();
try (SocketChannel clientChannel = serverChannel.accept();
Scanner scanner = new Scanner(clientChannel, StandardCharsets.UTF_8)) {
while (!Thread.currentThread().isInterrupted()) {
if (scanner.hasNextLine()) {
this.consumer.accept(scanner.nextLine());
}
}
}
} catch (IOException e) {
throw new UncheckedIOException("Failed to listen for IPC messages", e);
}
}
@Override
public void close() throws InterruptedException {
loggerReceiverService.shutdownNow();
loggerReceiverService.awaitTermination(10, TimeUnit.SECONDS);
}
}
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