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/*
* This file is a part of BSL Language Server.
*
* Copyright (c) 2018-2023
* Alexey Sosnoviy , Nikita Fedkin and contributors
*
* SPDX-License-Identifier: LGPL-3.0-or-later
*
* BSL Language Server is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3.0 of the License, or (at your option) any later version.
*
* BSL Language Server is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with BSL Language Server.
*/
package com.github._1c_syntax.bsl.languageserver;
import com.github._1c_syntax.bsl.languageserver.events.LanguageServerInitializeRequestReceivedEvent;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.eclipse.lsp4j.services.LanguageServer;
import org.springframework.context.event.EventListener;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
/**
* Наблюдатель за жизнью родительского процесса, запустившего Language Server.
*/
@Component
@Slf4j
@RequiredArgsConstructor
public class ParentProcessWatcher {
private final LanguageServer languageServer;
private long parentProcessId;
/**
* Обработчик события {@link LanguageServerInitializeRequestReceivedEvent}.
*
* Анализирует параметры запроса и подготавливает данные для слежения за родительским процессом.
*
* @param event Событие
*/
@EventListener
public void handleEvent(LanguageServerInitializeRequestReceivedEvent event) {
var processId = event.getParams().getProcessId();
if (processId == null) {
return;
}
parentProcessId = processId;
}
/**
* Фоновая процедура, отслеживающая родительский процесс.
*/
@Scheduled(fixedDelay = 30000L)
public void watch() {
if (parentProcessId == 0) {
return;
}
boolean processIsAlive = ProcessHandle.of(parentProcessId)
.map(ProcessHandle::isAlive)
.orElse(false);
if (!processIsAlive) {
LOGGER.info("Parent process with pid {} is not found. Closing application...", parentProcessId);
languageServer.exit();
}
}
}