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package com.sun.enterprise.admin.mbeans.custom.loading;
import com.sun.enterprise.admin.mbeans.custom.CMBStrings;
import com.sun.enterprise.admin.server.core.CustomMBeanException;
import java.lang.reflect.Constructor;
import java.util.*;
import com.sun.enterprise.admin.common.constant.AdminConstants;
import javax.management.Attribute;
import javax.management.AttributeNotFoundException;
import javax.management.InstanceNotFoundException;
import javax.management.InvalidAttributeValueException;
import javax.management.MBeanAttributeInfo;
import javax.management.MBeanException;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import javax.management.ReflectionException;
import java.util.logging.Logger;
/** Class to set the attributes of given MBean taking into account the types of the
* attributes.
*/
public class MBeanAttributeSetter {
private static final Logger logger = Logger.getLogger(AdminConstants.kLoggerName);
private final MBeanServer mbs;
private final ObjectName on;
public MBeanAttributeSetter(final MBeanServer mbs, final ObjectName on) {
this.mbs = mbs;
this.on = on;
}
public void setIt(final String name, final String value) throws CustomMBeanException {
try
{
final String at = getAttributeType(name);
final Object atv = getAttributeValue(at, name, value); // construct the attribute from "String" value
final Attribute atr = new Attribute(name, atv);
mbs.setAttribute(on, atr);
}
catch(CustomMBeanException cmbe)
{
throw cmbe;
}
catch(Exception e)
{
throw new CustomMBeanException(e);
}
}
///// Private Methods /////
private String getAttributeType(final String name) throws CustomMBeanException { //gets it from MBeanInfo
String type = null;
List<String> attNames = new ArrayList<String>(); // just in case we need to log this info in the event of an error...
try {
MBeanAttributeInfo[] mais = mbs.getMBeanInfo(on).getAttributes();
for (MBeanAttributeInfo mai : mais) {
final String an = mai.getName();
attNames.add(an);
if (an.equals(name)) {
type = mai.getType();
break;
}
}
} catch (final Exception e) { //TODO
//even though one can land here, it is okay to squelch this exception
// Log it and move on
logger.info(CMBStrings.get("getAttributeTypeNonFatal", name));
}
if(type == null){
// this is an error! They probably misspelled the Attribute Name.
// this code is NEVER called unless we are expecting to *find* the attribute
String names = new String();
for(int i = 0; i < attNames.size(); i++){
if(i != 0)
names += ", ";
names += attNames.get(i);
}
String mesg = CMBStrings.get("cmb.badAttribute", name, names);
logger.warning(mesg);
throw new CustomMBeanException(mesg);
}
return ( type );
}
/** Method to construct an instance of a type from its String representation. Note that for
this method to succeed, the type class has to have such a constructor that
accepts a String and creates the instance of that type. Most of the primitive
wrappers have such a constructor. This requirement has to be satisfied because
the attributes of an MBean will be persisted to a config file and can only
be read back as Strings.
*/
private Object getAttributeValue(final String type, final String name, final String value) throws CustomMBeanException{
Object valueObject = null;
try {
if (isPrimitive(type)) {
//recursive call
return ( getAttributeValue(toWrapper(type), name, value) );
}
final Class c = Class.forName(type);
final Object[] params = new Object[]{value};
// special case...
if(c.equals(Character.class)){
if(value.length() != 1){
String mesg = CMBStrings.get("cmb.badCharAttribute", name, value);
logger.warning(mesg);
throw new CustomMBeanException(mesg);
}
valueObject = Character.valueOf(value.charAt(0));
}
else{
final Constructor ctor = c.getConstructor(new Class[]{java.lang.String.class});
valueObject = ctor.newInstance(params);
}
} catch (final Throwable t) {
final String msg = CMBStrings.get("attributeValueError", name, type, value);
throw new CustomMBeanException (msg, t);
}
return ( valueObject );
}
private boolean isPrimitive(final String type) {
boolean primitive = int.class.getName().equals(type) ||
char.class.getName().equals(type) ||
short.class.getName().equals(type) ||
byte.class.getName().equals(type) ||
boolean.class.getName().equals(type) ||
double.class.getName().equals(type) ||
float.class.getName().equals(type) ||
long.class.getName().equals(type);
return ( primitive );
}
private String toWrapper(final String primitive) {
return ( P2W.get(primitive) );
}
private static final Map<String, String> P2W = new HashMap<String, String>();
static {
P2W.put(int.class.getName(), java.lang.Integer.class.getName());
P2W.put(char.class.getName(), java.lang.Character.class.getName());
P2W.put(short.class.getName(), java.lang.Short.class.getName());
P2W.put(byte.class.getName(), java.lang.Byte.class.getName());
P2W.put(boolean.class.getName(), java.lang.Boolean.class.getName());
P2W.put(double.class.getName(), java.lang.Double.class.getName());
P2W.put(float.class.getName(), java.lang.Float.class.getName());
P2W.put(long.class.getName(), java.lang.Long.class.getName());
}
///// Private Methods /////
} |
