meecrowave-core/src/main/java/org/apache/meecrowave/tomcat/NoDescriptorRegistry.java

/*
 * 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.meecrowave.tomcat;

import org.apache.tomcat.util.modeler.ManagedBean;
import org.apache.tomcat.util.modeler.Registry;

import javax.management.Attribute;
import javax.management.AttributeList;
import javax.management.AttributeNotFoundException;
import javax.management.InstanceAlreadyExistsException;
import javax.management.InstanceNotFoundException;
import javax.management.IntrospectionException;
import javax.management.InvalidAttributeValueException;
import javax.management.ListenerNotFoundException;
import javax.management.MBeanException;
import javax.management.MBeanInfo;
import javax.management.MBeanOperationInfo;
import javax.management.MBeanRegistrationException;
import javax.management.MBeanServer;
import javax.management.NotCompliantMBeanException;
import javax.management.NotificationFilter;
import javax.management.NotificationListener;
import javax.management.ObjectInstance;
import javax.management.ObjectName;
import javax.management.OperationsException;
import javax.management.QueryExp;
import javax.management.ReflectionException;
import javax.management.loading.ClassLoaderRepository;
import java.io.ObjectInputStream;
import java.util.List;
import java.util.Set;

import static java.util.Collections.emptyList;

// skip Tomcat MBeans, goal is really to skip mbean-descriptors.xml reading which is slow for small apps.
public class NoDescriptorRegistry extends Registry {
    private final MBeanServer mBeanServer = new NoJmxMBeanServer();
    private final ManagedBean defaultMBean = new PassthroughMBean();

    @Override
    public void registerComponent(final Object bean, final String oname, final String type) throws Exception {
        // no-op
    }

    @Override
    public void unregisterComponent(final String oname) {
        // no-op
    }

    @Override
    public void invoke(final List<ObjectName> mbeans, final String operation, final boolean failFirst) throws Exception {
        // no-op
    }

    @Override
    public int getId(final String domain, final String name) {
        return 0;
    }

    @Override
    public void addManagedBean(final ManagedBean bean) {
        // no-op
    }

    @Override
    public ManagedBean findManagedBean(final String name) {
        return defaultMBean;
    }

    @Override
    public String getType(final ObjectName oname, final String attName) {
        return null;
    }

    @Override
    public MBeanOperationInfo getMethodInfo(final ObjectName oname, final String opName) {
        return null;
    }

    @Override
    public ManagedBean findManagedBean(final Object bean, final Class<?> beanClass, final String type) throws Exception {
        return null;
    }

    @Override
    public List<ObjectName> load(final String sourceType, final Object source, final String param) throws Exception {
        return emptyList();
    }

    @Override
    public void loadDescriptors(final String packageName, final ClassLoader classLoader) {
        // no-op
    }

    @Override
    public void registerComponent(final Object bean, final ObjectName oname, final String type) throws Exception {
        // no-op
    }

    @Override
    public void unregisterComponent(final ObjectName oname) {
        // no-op
    }

    @Override
    public MBeanServer getMBeanServer() {
        return mBeanServer;
    }

    private static class NoJmxMBeanServer implements MBeanServer {
        @Override
        public ObjectInstance createMBean(String className, ObjectName name) throws ReflectionException, InstanceAlreadyExistsException, MBeanRegistrationException, NotCompliantMBeanException, MBeanRegistrationException {
            return null;
        }

        @Override
        public ObjectInstance createMBean(String className, ObjectName name, ObjectName loaderName) throws ReflectionException, InstanceAlreadyExistsException, MBeanRegistrationException, NotCompliantMBeanException, InstanceNotFoundException, MBeanRegistrationException {
            return null;
        }

        @Override
        public ObjectInstance createMBean(String className, ObjectName name, Object[] params, String[] signature) throws ReflectionException, InstanceAlreadyExistsException, MBeanRegistrationException, NotCompliantMBeanException, MBeanRegistrationException {
            return null;
        }

        @Override
        public ObjectInstance createMBean(String className, ObjectName name, ObjectName loaderName, Object[] params, String[] signature) throws ReflectionException, InstanceAlreadyExistsException, MBeanRegistrationException, NotCompliantMBeanException, InstanceNotFoundException, MBeanRegistrationException {
            return null;
        }

        @Override
        public ObjectInstance registerMBean(Object object, ObjectName name) throws InstanceAlreadyExistsException, MBeanRegistrationException, NotCompliantMBeanException {
            return null;
        }

        @Override
        public void unregisterMBean(ObjectName name) throws InstanceNotFoundException, MBeanRegistrationException {

        }

        @Override
        public ObjectInstance getObjectInstance(ObjectName name) throws InstanceNotFoundException {
            return null;
        }

        @Override
        public Set<ObjectInstance> queryMBeans(ObjectName name, QueryExp query) {
            return null;
        }

        @Override
        public Set<ObjectName> queryNames(ObjectName name, QueryExp query) {
            return null;
        }

        @Override
        public boolean isRegistered(ObjectName name) {
            return false;
        }

        @Override
        public Integer getMBeanCount() {
            return null;
        }

        @Override
        public Object getAttribute(ObjectName name, String attribute) throws MBeanException, AttributeNotFoundException, InstanceNotFoundException, ReflectionException {
            return null;
        }

        @Override
        public AttributeList getAttributes(ObjectName name, String[] attributes) throws InstanceNotFoundException, ReflectionException {
            return null;
        }

        @Override
        public void setAttribute(ObjectName name, Attribute attribute) throws InstanceNotFoundException, AttributeNotFoundException, InvalidAttributeValueException, MBeanException, ReflectionException {

        }

        @Override
        public AttributeList setAttributes(ObjectName name, AttributeList attributes) throws InstanceNotFoundException, ReflectionException {
            return null;
        }

        @Override
        public Object invoke(ObjectName name, String operationName, Object[] params, String[] signature) throws InstanceNotFoundException, MBeanException, ReflectionException {
            return null;
        }

        @Override
        public String getDefaultDomain() {
            return null;
        }

        @Override
        public String[] getDomains() {
            return new String[0];
        }

        @Override
        public void addNotificationListener(ObjectName name, NotificationListener listener, NotificationFilter filter, Object handback) throws InstanceNotFoundException {

        }

        @Override
        public void addNotificationListener(ObjectName name, ObjectName listener, NotificationFilter filter, Object handback) throws InstanceNotFoundException {

        }

        @Override
        public void removeNotificationListener(ObjectName name, ObjectName listener) throws InstanceNotFoundException, ListenerNotFoundException {

        }

        @Override
        public void removeNotificationListener(ObjectName name, ObjectName listener, NotificationFilter filter, Object handback) throws InstanceNotFoundException, ListenerNotFoundException {

        }

        @Override
        public void removeNotificationListener(ObjectName name, NotificationListener listener) throws InstanceNotFoundException, ListenerNotFoundException {

        }

        @Override
        public void removeNotificationListener(ObjectName name, NotificationListener listener, NotificationFilter filter, Object handback) throws InstanceNotFoundException, ListenerNotFoundException {

        }

        @Override
        public MBeanInfo getMBeanInfo(ObjectName name) throws InstanceNotFoundException, IntrospectionException, ReflectionException {
            return null;
        }

        @Override
        public boolean isInstanceOf(ObjectName name, String className) throws InstanceNotFoundException {
            return false;
        }

        @Override
        public Object instantiate(String className) throws ReflectionException, MBeanException {
            return null;
        }

        @Override
        public Object instantiate(String className, ObjectName loaderName) throws ReflectionException, MBeanException, InstanceNotFoundException {
            return null;
        }

        @Override
        public Object instantiate(String className, Object[] params, String[] signature) throws ReflectionException, MBeanException {
            return null;
        }

        @Override
        public Object instantiate(String className, ObjectName loaderName, Object[] params, String[] signature) throws ReflectionException, MBeanException, InstanceNotFoundException {
            return null;
        }

        @Override
        public ObjectInputStream deserialize(ObjectName name, byte[] data) throws InstanceNotFoundException, OperationsException {
            return null;
        }

        @Override
        public ObjectInputStream deserialize(String className, byte[] data) throws OperationsException, ReflectionException {
            return null;
        }

        @Override
        public ObjectInputStream deserialize(String className, ObjectName loaderName, byte[] data) throws InstanceNotFoundException, OperationsException, ReflectionException {
            return null;
        }

        @Override
        public ClassLoader getClassLoaderFor(ObjectName mbeanName) throws InstanceNotFoundException {
            return null;
        }

        @Override
        public ClassLoader getClassLoader(ObjectName loaderName) throws InstanceNotFoundException {
            return null;
        }

        @Override
        public ClassLoaderRepository getClassLoaderRepository() {
            return null;
        }
    }

    private static class PassthroughMBean extends ManagedBean {
    }
}