io.micronaut.runtime.context.scope.refresh.RefreshInterceptor Maven / Gradle / Ivy
/*
* Copyright 2017-2020 original 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 io.micronaut.runtime.context.scope.refresh;
import io.micronaut.aop.MethodInterceptor;
import io.micronaut.aop.MethodInvocationContext;
import javax.inject.Singleton;
import java.util.concurrent.locks.Lock;
/**
* A {@link MethodInterceptor} that will lock the bean preventing it from being destroyed by a
* {@link RefreshEvent} until the method completes.
*
* @author Graeme Rocher
* @since 1.0
*/
@Singleton
public class RefreshInterceptor implements MethodInterceptor {
private final RefreshScope refreshScope;
/**
* @param refreshScope To allow target beans to be refreshed
*/
public RefreshInterceptor(RefreshScope refreshScope) {
this.refreshScope = refreshScope;
}
@Override
public Object intercept(MethodInvocationContext context) {
Object target = context.getTarget();
Lock lock = refreshScope.getLock(target).readLock();
try {
lock.lock();
return context.proceed();
} finally {
lock.unlock();
}
}
}