forked from struberg/deltaspike
/
ClassDeactivation.java
122 lines (104 loc) · 4.23 KB
/
ClassDeactivation.java
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/*
* 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 org.apache.deltaspike.core.api.activation;
import org.apache.deltaspike.core.api.config.ConfigResolver;
import org.apache.deltaspike.core.api.util.ClassUtils;
import javax.enterprise.inject.Typed;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Logger;
/**
* Helper methods for {@link ClassDeactivator}
*/
@Typed()
public final class ClassDeactivation
{
private static final Logger LOG = Logger.getLogger(ClassDeactivation.class.getName());
/**
* This Map holds the ClassLoader as first level to make it possible to have different configurations per
* WebApplication in an EAR or other Multi-ClassLoader scenario.
*
* The Map then contains a List of {@link ClassDeactivator}s in order of their configured ordinal.
*/
private static Map<ClassLoader, List<ClassDeactivator>> classDeactivatorMap
= new ConcurrentHashMap<ClassLoader, List<ClassDeactivator>>();
private ClassDeactivation()
{
// private ct to prevent utility class from instantiation.
}
/**
* Evaluates if the given {@link Deactivatable} is active.
*
* @param deactivatableClazz {@link Deactivatable} under test.
* @return <code>true</code> if it is active, <code>false</code> otherwise
*/
public static synchronized boolean isActivated(Class<? extends Deactivatable> deactivatableClazz)
{
List<ClassDeactivator> classDeactivators = getClassDeactivators();
Boolean isActivated = Boolean.TRUE; // by default a class is always activated.
for (ClassDeactivator classDeactivator : classDeactivators)
{
Boolean isLocallyActivated = classDeactivator.isActivated(deactivatableClazz);
if (isLocallyActivated != null)
{
isActivated = isLocallyActivated;
}
}
if (!isActivated)
{
LOG.info("Deactivating class " + deactivatableClazz);
}
return isActivated;
}
/**
* @return the List of configured @{link ClassDeactivator}s for the current context ClassLoader.
*/
private static List<ClassDeactivator> getClassDeactivators()
{
List<ClassDeactivator> classDeactivators = classDeactivatorMap.get(ClassUtils.getClassLoader(null));
if (classDeactivators == null)
{
classDeactivators = getConfiguredClassDeactivator();
}
return classDeactivators;
}
private static List<ClassDeactivator> getConfiguredClassDeactivator()
{
List<String> classDeactivatorClassNames = ConfigResolver.getAllPropertyValues(ClassDeactivator.class.getName());
List<ClassDeactivator> classDeactivators = new ArrayList<ClassDeactivator>();
for (String classDeactivatorClassName : classDeactivatorClassNames)
{
LOG.fine("processing ClassDeactivator: " + classDeactivatorClassName);
try
{
ClassDeactivator currentClassDeactivator =
(ClassDeactivator) ClassUtils.instantiateClassForName(classDeactivatorClassName);
classDeactivators.add(currentClassDeactivator);
}
catch (Exception e)
{
LOG.warning(classDeactivatorClassName + " can't be instantiated");
throw new RuntimeException(e);
}
}
return classDeactivators;
}
}