| /* |
| * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.jmx.mbeanserver; |
| |
| import java.security.AccessController; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| import javax.management.AttributeNotFoundException; |
| import javax.management.InvalidAttributeValueException; |
| import javax.management.MBeanException; |
| import javax.management.MBeanInfo; |
| import javax.management.ReflectionException; |
| |
| import static com.sun.jmx.mbeanserver.Util.*; |
| |
| /** |
| * Per-MBean-interface behavior. A single instance of this class can be shared |
| * by all MBeans of the same kind (Standard MBean or MXBean) that have the same |
| * MBean interface. |
| * |
| * @since 1.6 |
| */ |
| final class PerInterface<M> { |
| PerInterface(Class<?> mbeanInterface, MBeanIntrospector<M> introspector, |
| MBeanAnalyzer<M> analyzer, MBeanInfo mbeanInfo) { |
| this.mbeanInterface = mbeanInterface; |
| this.introspector = introspector; |
| this.mbeanInfo = mbeanInfo; |
| analyzer.visit(new InitMaps()); |
| } |
| |
| Class<?> getMBeanInterface() { |
| return mbeanInterface; |
| } |
| |
| MBeanInfo getMBeanInfo() { |
| return mbeanInfo; |
| } |
| |
| boolean isMXBean() { |
| return introspector.isMXBean(); |
| } |
| |
| Object getAttribute(Object resource, String attribute, Object cookie) |
| throws AttributeNotFoundException, |
| MBeanException, |
| ReflectionException { |
| |
| final M cm = getters.get(attribute); |
| if (cm == null) { |
| final String msg; |
| if (setters.containsKey(attribute)) |
| msg = "Write-only attribute: " + attribute; |
| else |
| msg = "No such attribute: " + attribute; |
| throw new AttributeNotFoundException(msg); |
| } |
| return introspector.invokeM(cm, resource, (Object[]) null, cookie); |
| } |
| |
| void setAttribute(Object resource, String attribute, Object value, |
| Object cookie) |
| throws AttributeNotFoundException, |
| InvalidAttributeValueException, |
| MBeanException, |
| ReflectionException { |
| |
| final M cm = setters.get(attribute); |
| if (cm == null) { |
| final String msg; |
| if (getters.containsKey(attribute)) |
| msg = "Read-only attribute: " + attribute; |
| else |
| msg = "No such attribute: " + attribute; |
| throw new AttributeNotFoundException(msg); |
| } |
| introspector.invokeSetter(attribute, cm, resource, value, cookie); |
| } |
| |
| Object invoke(Object resource, String operation, Object[] params, |
| String[] signature, Object cookie) |
| throws MBeanException, ReflectionException { |
| |
| final List<MethodAndSig> list = ops.get(operation); |
| if (list == null) { |
| final String msg = "No such operation: " + operation; |
| return noSuchMethod(msg, resource, operation, params, signature, |
| cookie); |
| } |
| if (signature == null) |
| signature = new String[0]; |
| MethodAndSig found = null; |
| for (MethodAndSig mas : list) { |
| if (Arrays.equals(mas.signature, signature)) { |
| found = mas; |
| break; |
| } |
| } |
| if (found == null) { |
| final String badSig = sigString(signature); |
| final String msg; |
| if (list.size() == 1) { // helpful exception message |
| msg = "Signature mismatch for operation " + operation + |
| ": " + badSig + " should be " + |
| sigString(list.get(0).signature); |
| } else { |
| msg = "Operation " + operation + " exists but not with " + |
| "this signature: " + badSig; |
| } |
| return noSuchMethod(msg, resource, operation, params, signature, |
| cookie); |
| } |
| return introspector.invokeM(found.method, resource, params, cookie); |
| } |
| |
| /* |
| * This method is called when invoke doesn't find the named method. |
| * Before throwing an exception, we check to see whether the |
| * jmx.invoke.getters property is set, and if so whether the method |
| * being invoked might be a getter or a setter. If so we invoke it |
| * and return the result. This is for compatibility |
| * with code based on JMX RI 1.0 or 1.1 which allowed invoking getters |
| * and setters. It is *not* recommended that new code use this feature. |
| * |
| * Since this method is either going to throw an exception or use |
| * functionality that is strongly discouraged, we consider that its |
| * performance is not very important. |
| * |
| * A simpler way to implement the functionality would be to add the getters |
| * and setters to the operations map when jmx.invoke.getters is set. |
| * However, that means that the property is consulted when an MBean |
| * interface is being introspected and not thereafter. Previously, |
| * the property was consulted on every invocation. So this simpler |
| * implementation could potentially break code that sets and unsets |
| * the property at different times. |
| */ |
| private Object noSuchMethod(String msg, Object resource, String operation, |
| Object[] params, String[] signature, |
| Object cookie) |
| throws MBeanException, ReflectionException { |
| |
| // Construct the exception that we will probably throw |
| final NoSuchMethodException nsme = |
| new NoSuchMethodException(operation + sigString(signature)); |
| final ReflectionException exception = |
| new ReflectionException(nsme, msg); |
| |
| if (introspector.isMXBean()) |
| throw exception; // No compatibility requirement here |
| |
| // Is the compatibility property set? |
| GetPropertyAction act = new GetPropertyAction("jmx.invoke.getters"); |
| String invokeGettersS; |
| try { |
| invokeGettersS = AccessController.doPrivileged(act); |
| } catch (Exception e) { |
| // We don't expect an exception here but if we get one then |
| // we'll simply assume that the property is not set. |
| invokeGettersS = null; |
| } |
| if (invokeGettersS == null) |
| throw exception; |
| |
| int rest = 0; |
| Map<String, M> methods = null; |
| if (signature == null || signature.length == 0) { |
| if (operation.startsWith("get")) |
| rest = 3; |
| else if (operation.startsWith("is")) |
| rest = 2; |
| if (rest != 0) |
| methods = getters; |
| } else if (signature.length == 1 && |
| operation.startsWith("set")) { |
| rest = 3; |
| methods = setters; |
| } |
| |
| if (rest != 0) { |
| String attrName = operation.substring(rest); |
| M method = methods.get(attrName); |
| if (method != null && introspector.getName(method).equals(operation)) { |
| String[] msig = introspector.getSignature(method); |
| if ((signature == null && msig.length == 0) || |
| Arrays.equals(signature, msig)) { |
| return introspector.invokeM(method, resource, params, cookie); |
| } |
| } |
| } |
| |
| throw exception; |
| } |
| |
| private String sigString(String[] signature) { |
| StringBuilder b = new StringBuilder("("); |
| if (signature != null) { |
| for (String s : signature) { |
| if (b.length() > 1) |
| b.append(", "); |
| b.append(s); |
| } |
| } |
| return b.append(")").toString(); |
| } |
| |
| /** |
| * Visitor that sets up the method maps (operations, getters, setters). |
| */ |
| private class InitMaps implements MBeanAnalyzer.MBeanVisitor<M> { |
| public void visitAttribute(String attributeName, |
| M getter, |
| M setter) { |
| if (getter != null) { |
| introspector.checkMethod(getter); |
| final Object old = getters.put(attributeName, getter); |
| assert(old == null); |
| } |
| if (setter != null) { |
| introspector.checkMethod(setter); |
| final Object old = setters.put(attributeName, setter); |
| assert(old == null); |
| } |
| } |
| |
| public void visitOperation(String operationName, |
| M operation) { |
| introspector.checkMethod(operation); |
| final String[] sig = introspector.getSignature(operation); |
| final MethodAndSig mas = new MethodAndSig(); |
| mas.method = operation; |
| mas.signature = sig; |
| List<MethodAndSig> list = ops.get(operationName); |
| if (list == null) |
| list = Collections.singletonList(mas); |
| else { |
| if (list.size() == 1) |
| list = newList(list); |
| list.add(mas); |
| } |
| ops.put(operationName, list); |
| } |
| } |
| |
| private class MethodAndSig { |
| M method; |
| String[] signature; |
| } |
| |
| private final Class<?> mbeanInterface; |
| private final MBeanIntrospector<M> introspector; |
| private final MBeanInfo mbeanInfo; |
| private final Map<String, M> getters = newMap(); |
| private final Map<String, M> setters = newMap(); |
| private final Map<String, List<MethodAndSig>> ops = newMap(); |
| } |