LoggerDynamicMBeanpublic class LoggerDynamicMBean extends AbstractDynamicMBean implements NotificationListener
| Fields Summary |
|---|
| private MBeanConstructorInfo[] | dConstructors | | private MBeanOperationInfo[] | dOperations | | private Vector | dAttributes | | private String | dClassName | | private String | dDescription | | private static Logger | cat | | private Logger | logger |
| Constructors Summary |
|---|
public LoggerDynamicMBean(Logger logger)
this.logger = logger;
buildDynamicMBeanInfo();
|
| Methods Summary |
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| void | addAppender(java.lang.String appenderClass, java.lang.String appenderName)
cat.debug("addAppender called with "+appenderClass+", "+appenderName);
Appender appender = (Appender)
OptionConverter.instantiateByClassName(appenderClass,
org.apache.log4j.Appender.class,
null);
appender.setName(appenderName);
logger.addAppender(appender);
//appenderMBeanRegistration();
| | void | appenderMBeanRegistration()
Enumeration enumeration = logger.getAllAppenders();
while(enumeration.hasMoreElements()) {
Appender appender = (Appender) enumeration.nextElement();
registerAppenderMBean(appender);
}
| | private void | buildDynamicMBeanInfo()
Constructor[] constructors = this.getClass().getConstructors();
dConstructors[0] = new MBeanConstructorInfo(
"HierarchyDynamicMBean(): Constructs a HierarchyDynamicMBean instance",
constructors[0]);
dAttributes.add(new MBeanAttributeInfo("name",
"java.lang.String",
"The name of this Logger.",
true,
false,
false));
dAttributes.add(new MBeanAttributeInfo("priority",
"java.lang.String",
"The priority of this logger.",
true,
true,
false));
MBeanParameterInfo[] params = new MBeanParameterInfo[2];
params[0] = new MBeanParameterInfo("class name", "java.lang.String",
"add an appender to this logger");
params[1] = new MBeanParameterInfo("appender name", "java.lang.String",
"name of the appender");
dOperations[0] = new MBeanOperationInfo("addAppender",
"addAppender(): add an appender",
params,
"void",
MBeanOperationInfo.ACTION);
| | public java.lang.Object | getAttribute(java.lang.String attributeName)
// 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");
}
// Check for a recognized attributeName and call the corresponding getter
if (attributeName.equals("name")) {
return logger.getName();
} else if(attributeName.equals("priority")) {
Level l = logger.getLevel();
if(l == null) {
return null;
} else {
return l.toString();
}
} else if(attributeName.startsWith("appender=")) {
try {
return new ObjectName("log4j:"+attributeName );
} catch(Exception e) {
cat.error("Could not create ObjectName" + attributeName);
}
}
// If attributeName has not been recognized throw an AttributeNotFoundException
throw(new AttributeNotFoundException("Cannot find " + attributeName +
" attribute in " + dClassName));
| | protected org.apache.log4j.Logger | getLogger()
return logger;
| | public javax.management.MBeanInfo | getMBeanInfo()
//cat.debug("getMBeanInfo called.");
MBeanAttributeInfo[] attribs = new MBeanAttributeInfo[dAttributes.size()];
dAttributes.toArray(attribs);
MBeanInfo mb = new MBeanInfo(dClassName,
dDescription,
attribs,
dConstructors,
dOperations,
new MBeanNotificationInfo[0]);
//cat.debug("getMBeanInfo exit.");
return mb;
| | public void | handleNotification(javax.management.Notification notification, java.lang.Object handback)
cat.debug("Received notification: "+notification.getType());
registerAppenderMBean((Appender) notification.getUserData() );
| | public java.lang.Object | invoke(java.lang.String operationName, java.lang.Object[] params, java.lang.String[] signature)
if(operationName.equals("addAppender")) {
addAppender((String) params[0], (String) params[1]);
return "Hello world.";
}
return null;
| | public void | postRegister(java.lang.Boolean registrationDone)
appenderMBeanRegistration();
| | void | registerAppenderMBean(org.apache.log4j.Appender appender)
String name = appender.getName();
cat.debug("Adding AppenderMBean for appender named "+name);
ObjectName objectName = null;
try {
AppenderDynamicMBean appenderMBean = new AppenderDynamicMBean(appender);
objectName = new ObjectName("log4j", "appender", name);
if (!server.isRegistered(objectName)) {
server.registerMBean(appenderMBean, objectName);
dAttributes.add(new MBeanAttributeInfo("appender=" + name, "javax.management.ObjectName",
"The " + name + " appender.", true, true, false));
}
} catch(Exception e) {
cat.error("Could not add appenderMBean for ["+name+"].", e);
}
| | public void | setAttribute(javax.management.Attribute attribute)
// 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");
}
if(name.equals("priority")) {
if (value instanceof String) {
String s = (String) value;
Level p = logger.getLevel();
if(s.equalsIgnoreCase("NULL")) {
p = null;
} else {
p = OptionConverter.toLevel(s, p);
}
logger.setLevel(p);
}
} else {
throw(new AttributeNotFoundException("Attribute " + name +
" not found in " +
this.getClass().getName()));
}
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