--- /dev/null
+/*
+ * 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.log4j.jmx;
+
+import org.apache.log4j.Appender;
+import org.apache.log4j.Layout;
+import org.apache.log4j.Level;
+import org.apache.log4j.Logger;
+import org.apache.log4j.Priority;
+import org.apache.log4j.helpers.OptionConverter;
+import org.apache.log4j.spi.OptionHandler;
+
+import javax.management.Attribute;
+import javax.management.AttributeNotFoundException;
+import javax.management.InvalidAttributeValueException;
+import javax.management.JMException;
+import javax.management.MBeanAttributeInfo;
+import javax.management.MBeanConstructorInfo;
+import javax.management.MBeanException;
+import javax.management.MBeanInfo;
+import javax.management.MBeanNotificationInfo;
+import javax.management.MBeanOperationInfo;
+import javax.management.MBeanParameterInfo;
+import javax.management.MBeanServer;
+import javax.management.MalformedObjectNameException;
+import javax.management.ObjectName;
+import javax.management.ReflectionException;
+import javax.management.RuntimeOperationsException;
+import java.beans.BeanInfo;
+import java.beans.IntrospectionException;
+import java.beans.Introspector;
+import java.beans.PropertyDescriptor;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.Hashtable;
+import java.util.Vector;
+import java.io.InterruptedIOException;
+
+public class AppenderDynamicMBean extends AbstractDynamicMBean {
+
+ private MBeanConstructorInfo[] dConstructors = new MBeanConstructorInfo[1];
+ private Vector dAttributes = new Vector();
+ private String dClassName = this.getClass().getName();
+
+ private Hashtable dynamicProps = new Hashtable(5);
+ private MBeanOperationInfo[] dOperations = new MBeanOperationInfo[2];
+ private String dDescription =
+ "This MBean acts as a management facade for log4j appenders.";
+
+ // This category instance is for logging.
+ private static Logger cat = Logger.getLogger(AppenderDynamicMBean.class);
+
+ // We wrap this appender instance.
+ private Appender appender;
+
+ public AppenderDynamicMBean(Appender appender) throws IntrospectionException {
+ this.appender = appender;
+ buildDynamicMBeanInfo();
+ }
+
+ private
+ void buildDynamicMBeanInfo() throws IntrospectionException {
+ Constructor[] constructors = this.getClass().getConstructors();
+ dConstructors[0] = new MBeanConstructorInfo(
+ "AppenderDynamicMBean(): Constructs a AppenderDynamicMBean instance",
+ constructors[0]);
+
+
+ BeanInfo bi = Introspector.getBeanInfo(appender.getClass());
+ PropertyDescriptor[] pd = bi.getPropertyDescriptors();
+
+ int size = pd.length;
+
+ for(int i = 0; i < size; i++) {
+ String name = pd[i].getName();
+ Method readMethod = pd[i].getReadMethod();
+ Method writeMethod = pd[i].getWriteMethod();
+ if(readMethod != null) {
+ Class returnClass = readMethod.getReturnType();
+ if(isSupportedType(returnClass)) {
+ String returnClassName;
+ if(returnClass.isAssignableFrom(Priority.class)) {
+ returnClassName = "java.lang.String";
+ } else {
+ returnClassName = returnClass.getName();
+ }
+
+ dAttributes.add(new MBeanAttributeInfo(name,
+ returnClassName,
+ "Dynamic",
+ true,
+ writeMethod != null,
+ false));
+ dynamicProps.put(name, new MethodUnion(readMethod, writeMethod));
+ }
+ }
+ }
+
+ MBeanParameterInfo[] params = new MBeanParameterInfo[0];
+
+ dOperations[0] = new MBeanOperationInfo("activateOptions",
+ "activateOptions(): add an appender",
+ params,
+ "void",
+ MBeanOperationInfo.ACTION);
+
+ params = new MBeanParameterInfo[1];
+ params[0] = new MBeanParameterInfo("layout class", "java.lang.String",
+ "layout class");
+
+ dOperations[1] = new MBeanOperationInfo("setLayout",
+ "setLayout(): add a layout",
+ params,
+ "void",
+ MBeanOperationInfo.ACTION);
+ }
+
+ private
+ boolean isSupportedType(Class clazz) {
+ if(clazz.isPrimitive()) {
+ return true;
+ }
+
+ if(clazz == String.class) {
+ return true;
+ }
+
+
+ if(clazz.isAssignableFrom(Priority.class)) {
+ return true;
+ }
+
+ return false;
+
+
+ }
+
+
+
+ public
+ MBeanInfo getMBeanInfo() {
+ cat.debug("getMBeanInfo called.");
+
+ MBeanAttributeInfo[] attribs = new MBeanAttributeInfo[dAttributes.size()];
+ dAttributes.toArray(attribs);
+
+ return new MBeanInfo(dClassName,
+ dDescription,
+ attribs,
+ dConstructors,
+ dOperations,
+ new MBeanNotificationInfo[0]);
+ }
+
+ public
+ Object invoke(String operationName, Object params[], String signature[])
+ throws MBeanException,
+ ReflectionException {
+
+ if(operationName.equals("activateOptions") &&
+ appender instanceof OptionHandler) {
+ OptionHandler oh = (OptionHandler) appender;
+ oh.activateOptions();
+ return "Options activated.";
+ } else if (operationName.equals("setLayout")) {
+ Layout layout = (Layout) OptionConverter.instantiateByClassName((String)
+ params[0],
+ Layout.class,
+ null);
+ appender.setLayout(layout);
+ registerLayoutMBean(layout);
+ }
+ return null;
+ }
+
+ void registerLayoutMBean(Layout layout) {
+ if(layout == null) {
+ return;
+ }
+
+ String name = getAppenderName(appender)+",layout="+layout.getClass().getName();
+ cat.debug("Adding LayoutMBean:"+name);
+ ObjectName objectName = null;
+ try {
+ LayoutDynamicMBean appenderMBean = new LayoutDynamicMBean(layout);
+ objectName = new ObjectName("log4j:appender="+name);
+ if (!server.isRegistered(objectName)) {
+ registerMBean(appenderMBean, objectName);
+ dAttributes.add(new MBeanAttributeInfo("appender=" + name, "javax.management.ObjectName",
+ "The " + name + " layout.", true, true, false));
+ }
+
+ } catch(JMException e) {
+ cat.error("Could not add DynamicLayoutMBean for ["+name+"].", e);
+ } catch(java.beans.IntrospectionException e) {
+ cat.error("Could not add DynamicLayoutMBean for ["+name+"].", e);
+ } catch(RuntimeException e) {
+ cat.error("Could not add DynamicLayoutMBean for ["+name+"].", e);
+ }
+ }
+
+ protected
+ Logger getLogger() {
+ return cat;
+ }
+
+
+ public
+ Object getAttribute(String attributeName) throws AttributeNotFoundException,
+ MBeanException,
+ ReflectionException {
+
+ // Check attributeName is not null to avoid NullPointerException later on
+ if (attributeName == null) {
+ throw new RuntimeOperationsException(new IllegalArgumentException(
+ "Attribute name cannot be null"),
+ "Cannot invoke a getter of " + dClassName + " with null attribute name");
+ }
+
+ cat.debug("getAttribute called with ["+attributeName+"].");
+ if(attributeName.startsWith("appender="+appender.getName()+",layout")) {
+ try {
+ return new ObjectName("log4j:"+attributeName );
+ } catch(MalformedObjectNameException e) {
+ cat.error("attributeName", e);
+ } catch(RuntimeException e) {
+ cat.error("attributeName", e);
+ }
+ }
+
+ MethodUnion mu = (MethodUnion) dynamicProps.get(attributeName);
+
+ //cat.debug("----name="+attributeName+", b="+b);
+
+ if(mu != null && mu.readMethod != null) {
+ try {
+ return mu.readMethod.invoke(appender, null);
+ } catch(IllegalAccessException e) {
+ return null;
+ } catch(InvocationTargetException e) {
+ if (e.getTargetException() instanceof InterruptedException
+ || e.getTargetException() instanceof InterruptedIOException) {
+ Thread.currentThread().interrupt();
+ }
+ return null;
+ } catch(RuntimeException e) {
+ return null;
+ }
+ }
+
+
+
+ // If attributeName has not been recognized throw an AttributeNotFoundException
+ throw(new AttributeNotFoundException("Cannot find " + attributeName +
+ " attribute in " + dClassName));
+
+ }
+
+
+ public
+ void setAttribute(Attribute attribute) throws AttributeNotFoundException,
+ InvalidAttributeValueException,
+ MBeanException,
+ ReflectionException {
+
+ // Check attribute is not null to avoid NullPointerException later on
+ if (attribute == null) {
+ throw new RuntimeOperationsException(
+ new IllegalArgumentException("Attribute cannot be null"),
+ "Cannot invoke a setter of " + dClassName +
+ " with null attribute");
+ }
+ String name = attribute.getName();
+ Object value = attribute.getValue();
+
+ if (name == null) {
+ throw new RuntimeOperationsException(
+ new IllegalArgumentException("Attribute name cannot be null"),
+ "Cannot invoke the setter of "+dClassName+
+ " with null attribute name");
+ }
+
+
+
+ MethodUnion mu = (MethodUnion) dynamicProps.get(name);
+
+ if(mu != null && mu.writeMethod != null) {
+ Object[] o = new Object[1];
+
+ Class[] params = mu.writeMethod.getParameterTypes();
+ if(params[0] == org.apache.log4j.Priority.class) {
+ value = OptionConverter.toLevel((String) value,
+ (Level) getAttribute(name));
+ }
+ o[0] = value;
+
+ try {
+ mu.writeMethod.invoke(appender, o);
+
+ } catch(InvocationTargetException e) {
+ if (e.getTargetException() instanceof InterruptedException
+ || e.getTargetException() instanceof InterruptedIOException) {
+ Thread.currentThread().interrupt();
+ }
+ cat.error("FIXME", e);
+ } catch(IllegalAccessException e) {
+ cat.error("FIXME", e);
+ } catch(RuntimeException e) {
+ cat.error("FIXME", e);
+ }
+ } else if(name.endsWith(".layout")) {
+
+ } else {
+ throw(new AttributeNotFoundException("Attribute " + name +
+ " not found in " +
+ this.getClass().getName()));
+ }
+ }
+
+ public
+ ObjectName preRegister(MBeanServer server, ObjectName name) {
+ cat.debug("preRegister called. Server="+server+ ", name="+name);
+ this.server = server;
+ registerLayoutMBean(appender.getLayout());
+
+ return name;
+ }
+
+
+}
+
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