
com.alipay.sofa.ark.config.LazyActivatorWrapper Maven / Gradle / Ivy
/*
* 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 com.alipay.sofa.ark.config;
import com.alipay.sofa.ark.exception.ArkRuntimeException;
import com.alipay.sofa.ark.spi.service.PluginActivator;
/**
* @author zsk
* @version $Id: lazyInitActivator.java, v 0.1 2023年10月11日 17:57 zsk Exp $
*/
public class LazyActivatorWrapper {
/**
* activator类型
*/
private final Class activatorClass;
/**
* 延时产生的实例
*/
private volatile A lazyActivator;
public LazyActivatorWrapper(Class activatorClass) {
this.activatorClass = activatorClass;
}
public A getLazyActivator() {
if (null != lazyActivator) {
return lazyActivator;
}
synchronized (this) {
if (null == lazyActivator) {
try {
lazyActivator = activatorClass.newInstance();
} catch (InstantiationException instantE) {
throw new ArkRuntimeException(
"InstantiationException in create plugin activator "
+ activatorClass.getName(), instantE);
} catch (IllegalAccessException illegalE) {
throw new ArkRuntimeException(
"IllegalAccessException in create plugin activator "
+ activatorClass.getName(), illegalE);
} catch (Throwable e) {
throw e;
}
}
}
return lazyActivator;
}
}
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