| /* |
| * 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.cassandra.auth; |
| |
| import java.lang.management.ManagementFactory; |
| import java.util.Set; |
| import javax.management.MBeanServer; |
| import javax.management.MalformedObjectNameException; |
| import javax.management.ObjectName; |
| |
| import com.google.common.base.Objects; |
| import com.google.common.collect.Sets; |
| import org.apache.commons.lang3.StringUtils; |
| |
| public class JMXResource implements IResource |
| { |
| enum Level |
| { |
| ROOT, MBEAN |
| } |
| |
| private static final String ROOT_NAME = "mbean"; |
| private static final JMXResource ROOT_RESOURCE = new JMXResource(); |
| private final Level level; |
| private final String name; |
| |
| // permissions which may be granted on Mbeans |
| private static final Set<Permission> JMX_PERMISSIONS = Sets.immutableEnumSet(Permission.AUTHORIZE, |
| Permission.DESCRIBE, |
| Permission.EXECUTE, |
| Permission.MODIFY, |
| Permission.SELECT); |
| |
| private JMXResource() |
| { |
| level = Level.ROOT; |
| name = null; |
| } |
| |
| private JMXResource(String name) |
| { |
| this.name = name; |
| level = Level.MBEAN; |
| } |
| |
| public static JMXResource mbean(String name) |
| { |
| return new JMXResource(name); |
| } |
| |
| /** |
| * Parses a role resource name into a RoleResource instance. |
| * |
| * @param name Name of the data resource. |
| * @return RoleResource instance matching the name. |
| */ |
| public static JMXResource fromName(String name) |
| { |
| String[] parts = StringUtils.split(name, '/'); |
| |
| if (!parts[0].equals(ROOT_NAME) || parts.length > 2) |
| throw new IllegalArgumentException(String.format("%s is not a valid JMX resource name", name)); |
| |
| if (parts.length == 1) |
| return root(); |
| |
| return mbean(parts[1]); |
| } |
| |
| @Override |
| public String getName() |
| { |
| if (level == Level.ROOT) |
| return ROOT_NAME; |
| else if (level == Level.MBEAN) |
| return String.format("%s/%s", ROOT_NAME, name); |
| throw new AssertionError(); |
| } |
| |
| /** |
| * @return for a non-root resource, return the short form of the resource name which represents an ObjectName |
| * (which may be of the pattern or exact kind). i.e. not the full "root/name" version returned by getName(). |
| * Throws IllegalStateException if called on the root-level resource. |
| */ |
| public String getObjectName() |
| { |
| if (level == Level.ROOT) |
| throw new IllegalStateException(String.format("%s JMX resource has no object name", level)); |
| return name; |
| } |
| |
| /** |
| * @return the root-level resource. |
| */ |
| public static JMXResource root() |
| { |
| return ROOT_RESOURCE; |
| } |
| |
| @Override |
| public IResource getParent() |
| { |
| if (level == Level.MBEAN) |
| return root(); |
| throw new IllegalStateException("Root-level resource can't have a parent"); |
| } |
| |
| /** |
| * @return Whether or not the resource has a parent in the hierarchy. |
| */ |
| @Override |
| public boolean hasParent() |
| { |
| return !level.equals(Level.ROOT); |
| } |
| |
| @Override |
| public boolean exists() |
| { |
| if (!hasParent()) |
| return true; |
| MBeanServer mbs = ManagementFactory.getPlatformMBeanServer(); |
| try |
| { |
| return !(mbs.queryNames(new ObjectName(name), null).isEmpty()); |
| } |
| catch (MalformedObjectNameException e) |
| { |
| return false; |
| } |
| catch (NullPointerException e) |
| { |
| return false; |
| } |
| } |
| |
| @Override |
| public Set<Permission> applicablePermissions() |
| { |
| return JMX_PERMISSIONS; |
| } |
| |
| @Override |
| public String toString() |
| { |
| return level == Level.ROOT ? "<all mbeans>" : String.format("<mbean %s>", name); |
| } |
| |
| @Override |
| public boolean equals(Object o) |
| { |
| if (this == o) |
| return true; |
| |
| if (!(o instanceof JMXResource)) |
| return false; |
| |
| JMXResource j = (JMXResource) o; |
| |
| return Objects.equal(level, j.level) && Objects.equal(name, j.name); |
| } |
| |
| @Override |
| public int hashCode() |
| { |
| return Objects.hashCode(level, name); |
| } |
| } |