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* Licensed to the Apache Software Foundation (ASF) under one
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* 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
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package org.apache.deltaspike.core.impl.jmx;
import org.apache.deltaspike.core.api.config.ConfigResolver;
import org.apache.deltaspike.core.api.config.base.CoreBaseConfig;
import org.apache.deltaspike.core.api.jmx.JmxBroadcaster;
import org.apache.deltaspike.core.api.jmx.MBean;
import org.apache.deltaspike.core.spi.activation.Deactivatable;
import org.apache.deltaspike.core.util.BeanUtils;
import org.apache.deltaspike.core.util.ClassDeactivationUtils;
import javax.enterprise.event.Observes;
import javax.enterprise.inject.spi.AnnotatedType;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.BeforeBeanDiscovery;
import javax.enterprise.inject.spi.BeforeShutdown;
import javax.enterprise.inject.spi.Extension;
import javax.enterprise.inject.spi.ProcessManagedBean;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import java.lang.annotation.Annotation;
import java.lang.management.ManagementFactory;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Logger;
public class MBeanExtension implements Extension, Deactivatable
{
private static final Logger LOGGER = Logger.getLogger(MBeanExtension.class.getName());
private static final String DEFAULT_TYPE = "MBeans";
private static final String DEFAULT_CATEGORY = "org.apache.deltaspike";
private final Map<Class<?>, DynamicMBeanWrapper> wrappers = new ConcurrentHashMap<Class<?>, DynamicMBeanWrapper>();
private final Collection<ObjectName> objectNames = new ArrayList<ObjectName>();
private Boolean isActivated = true;
protected void init(@Observes BeforeBeanDiscovery beforeBeanDiscovery)
{
isActivated = ClassDeactivationUtils.isActivated(getClass());
}
protected void processBean(@Observes final ProcessManagedBean<?> bean, final BeanManager bm) throws Exception
{
if (!isActivated)
{
return;
}
MBean mBeanAnnotation = bean.getAnnotated().getAnnotation(MBean.class);
if (mBeanAnnotation != null)
{
registerObject(bean, mBeanAnnotation, bm);
}
}
protected void shutdown(@Observes final BeforeShutdown shutdown) throws Exception
{
if (!isActivated)
{
return;
}
final MBeanServer mBeanServer = mBeanServer();
for (ObjectName objectName : objectNames)
{
mBeanServer.unregisterMBean(objectName);
LOGGER.info("Unregistered MBean " + objectName.getCanonicalName());
}
objectNames.clear();
}
private void registerObject(final ProcessManagedBean<?> bean,
final MBean mBeanAnnotation,
final BeanManager bm) throws Exception
{
final Class<?> clazz = bean.getAnnotatedBeanClass().getJavaClass();
String objectNameValue = mBeanAnnotation.objectName();
if (objectNameValue.isEmpty())
{
final String type = getConfigurableAttribute(mBeanAnnotation.type(), DEFAULT_TYPE);
final String category = getConfigurableAttribute(mBeanAnnotation.category(), DEFAULT_CATEGORY);
final String properties = getConfigurableAttribute(mBeanAnnotation.properties(), "");
final String name = mBeanAnnotation.name();
final StringBuilder builder = new StringBuilder(category).append(':');
if (!properties.contains("type="))
{
builder.append("type=").append(type);
}
else if (!DEFAULT_TYPE.equals(type))
{
LOGGER.warning("type() ignored on " + clazz + " since properties contains it.");
}
if (!properties.contains("name="))
{
if (!name.isEmpty() || properties.isEmpty())
{
builder.append(",name=");
if (name.isEmpty())
{
builder.append(clazz.getName());
}
else
{
builder.append(name);
}
} // else skip. type is important in JMX but name is a fully custom property so we are able to skip it
}
if (!properties.isEmpty())
{
builder.append(',').append(properties);
}
objectNameValue = builder.toString();
}
final ObjectName objectName = new ObjectName(objectNameValue);
final boolean normalScoped = isNormalScope(bean.getAnnotated().getAnnotations(), bm);
final Annotation[] qualifiers = qualifiers(bean.getAnnotatedBeanClass(), bm);
final DynamicMBeanWrapper mbean = new DynamicMBeanWrapper(clazz, normalScoped, qualifiers);
final MBeanServer server = mBeanServer();
if (server.isRegistered(objectName) && CoreBaseConfig.MBeanIntegration.AUTO_UNREGISTER)
{
server.unregisterMBean(objectName);
}
server.registerMBean(mbean, objectName);
objectNames.add(objectName);
wrappers.put(clazz, mbean);
LOGGER.info("Registered MBean " + objectName); // don't use canonical name cause it can reorder properties
}
private Annotation[] qualifiers(final AnnotatedType<?> annotatedBeanClass, final BeanManager bm)
{
final Set<Annotation> qualifiers = BeanUtils.getQualifiers(bm, annotatedBeanClass.getAnnotations());
return qualifiers.toArray(new Annotation[qualifiers.size()]);
}
// annotated doesn't always contain inherited annotations
// TODO we have to check the origin of this issue
private boolean isNormalScope(final Set<Annotation> annotations, final BeanManager bm)
{
for (Annotation annotation : annotations)
{
if (bm.isNormalScope(annotation.annotationType()))
{
return true;
}
}
return false;
}
JmxBroadcaster getBroadcasterFor(final Class<?> clazz)
{
return wrappers.get(clazz);
}
private MBeanServer mBeanServer()
{
return ManagementFactory.getPlatformMBeanServer();
}
private String getConfigurableAttribute(final String annotationAttributeValue, final String defaultValue)
{
String val = annotationAttributeValue.trim();
if (val.startsWith("{") && val.endsWith("}"))
{
val = ConfigResolver.getPropertyValue(val.substring(1, val.length() - 1), defaultValue);
}
return val == null || val.isEmpty() ? defaultValue : val;
}
}