vip.justlive.oxygen.core.Bootstrap Maven / Gradle / Ivy
/*
* Copyright (C) 2020 the original author or authors.
*
* Licensed 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 vip.justlive.oxygen.core;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.atomic.AtomicBoolean;
import lombok.experimental.UtilityClass;
import lombok.extern.slf4j.Slf4j;
import vip.justlive.oxygen.core.bean.Singleton;
import vip.justlive.oxygen.core.exception.WrappedException;
import vip.justlive.oxygen.core.util.base.ServiceLoaderUtils;
import vip.justlive.oxygen.core.util.concurrent.ThreadUtils;
import vip.justlive.oxygen.core.util.io.FileUtils;
import vip.justlive.oxygen.core.util.io.IoUtils;
/**
* 引导类
*
* 用于加载程序启动需要的配置
*
* @author wubo
*/
@Slf4j
@UtilityClass
public class Bootstrap {
private final List PLUGINS = new ArrayList<>(8);
private final AtomicBoolean STATE = new AtomicBoolean(false);
private final Thread SHUTDOWN_HOOK;
private final String VERSION;
static {
String version;
try (InputStream in = Bootstrap.class
.getResourceAsStream("/vip/justlive/oxygen/core/Version")) {
version = IoUtils.toString(in);
} catch (Exception e) {
version = "oxygen/unknown";
}
VERSION = version;
SHUTDOWN_HOOK = ThreadUtils.defaultThreadFactory().newThread(Bootstrap::doClose);
}
/**
* 版本
*
* @return version
*/
public String version() {
return VERSION;
}
/**
* 添加自定义插件
*
* @param plugins 插件
*/
public void addCustomPlugin(Plugin... plugins) {
if (STATE.get()) {
throw new IllegalStateException("Bootstrap已启动");
}
PLUGINS.addAll(Arrays.asList(plugins));
}
/**
* 获取启动的插件
*
* @return plugins
*/
public List enabledPlugins() {
return Collections.unmodifiableList(PLUGINS);
}
/**
* 注册默认线程异常处理
*/
public void registerUncaughtExceptionHandler() {
if (Thread.getDefaultUncaughtExceptionHandler() == null) {
Thread.setDefaultUncaughtExceptionHandler(Bootstrap::handleException);
}
}
/**
* 启动Bootstrap
*/
public void start() {
if (STATE.compareAndSet(false, true)) {
log.info("starting bootstrap ...");
registerUncaughtExceptionHandler();
addSystemPlugin();
initPlugins();
registerShutdownHook();
log.info("bootstrap has started ! have fun");
}
}
/**
* 关闭Bootstrap
*/
public synchronized void close() {
doClose();
Runtime.getRuntime().removeShutdownHook(SHUTDOWN_HOOK);
}
/**
* 等待容器关闭，一般在没有web容器时使用
*/
public void sync() {
if (!STATE.get() || Thread.currentThread().isInterrupted()) {
return;
}
synchronized (STATE) {
while (STATE.get()) {
try {
STATE.wait();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
return;
}
}
}
}
/**
* 添加系统插件类
*/
private void addSystemPlugin() {
PLUGINS.addAll(ServiceLoaderUtils.loadServices(Plugin.class));
}
/**
* 初始化插件
*/
private void initPlugins() {
PLUGINS.addAll(Singleton.getList(Plugin.class));
Collections.sort(PLUGINS);
for (Plugin plugin : PLUGINS) {
log.info("start plugin: [{}]", plugin);
plugin.start();
}
}
/**
* 注册shutdown钩子
*/
private synchronized void registerShutdownHook() {
Runtime.getRuntime().addShutdownHook(SHUTDOWN_HOOK);
}
/**
* 关闭Bootstrap
*/
private void doClose() {
log.info("closing bootstrap ...");
for (Plugin plugin : PLUGINS) {
log.info("stop plugin: [{}]", plugin);
plugin.stop();
}
PLUGINS.clear();
FileUtils.cleanTempBaseDir();
STATE.set(false);
synchronized (STATE) {
STATE.notifyAll();
}
log.info("bootstrap closed ! bye bye");
}
private void handleException(Thread thread, Throwable throwable) {
if (throwable instanceof WrappedException) {
throwable = ((WrappedException) throwable).getException();
}
log.error("thread [{}] uncaught exception", thread.getName(), throwable);
}
}