/*
* @(#)StandardMBean.java 1.23 05/05/27
*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package javax.management;
import com.sun.jmx.mbeanserver.StandardMBeanMetaDataImpl;
import com.sun.jmx.trace.Trace;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.reflect.UndeclaredThrowableException;
/**
* <p>An MBean whose management interface is determined by reflection
* on a Java interface.</p>
*
* <p>This class brings more flexibility to the notion of Management
* Interface in the use of Standard MBeans. Straightforward use of
* the patterns for Standard MBeans described in the JMX Specification
* means that there is a fixed relationship between the implementation
* class of an MBean and its management interface (i.e., if the
* implementation class is Thing, the management interface must be
* ThingMBean). This class makes it possible to keep the convenience
* of specifying the management interface with a Java interface,
* without requiring that there be any naming relationship between the
* implementation and interface classes.</p>
*
* <p>By making a DynamicMBean out of an MBean, this class makes
* it possible to select any interface implemented by the MBean as its
* management interface, provided that it complies with JMX patterns
* (i.e., attributes defined by getter/setter etc...).</p>
*
* <p> This class also provides hooks that make it possible to supply
* custom descriptions and names for the {@link MBeanInfo} returned by
* the DynamicMBean interface.</p>
*
* <p>Using this class, an MBean can be created with any
* implementation class name <i>Impl</i> and with a management
* interface defined (as for current Standard MBeans) by any interface
* <i>Intf</i>, in one of two general ways:</p>
*
* <ul>
*
* <li>Using the public constructor
* {@link #StandardMBean(java.lang.Object, java.lang.Class)
* StandardMBean(impl,interface)}:
* <pre>
* MBeanServer mbs;
* ...
* Impl impl = new Impl(...);
* StandardMBean mbean = new StandardMBean(impl, Intf.class);
* mbs.registerMBean(mbean, objectName);
* </pre></li>
*
* <li>Subclassing StandardMBean:
* <pre>
* public class Impl extends StandardMBean implements Intf {
* public Impl() {
* super(Intf.class);
* }
* // implement methods of Intf
* }
*
* [...]
*
* MBeanServer mbs;
* ....
* Impl impl = new Impl();
* mbs.registerMBean(impl, objectName);
* </pre></li>
*
* </ul>
*
* <p>In either case, the class <i>Impl</i> must implement the
* interface <i>Intf</i>.</p>
*
* <p>Standard MBeans based on the naming relationship between
* implementation and interface classes are of course still
* available.</p>
*
* @since 1.5
* @since.unbundled JMX 1.2
*/
public class StandardMBean implements DynamicMBean {
/** The name of this class to be used for tracing */
private final static String dbgTag = "StandardMBean";
/**
* The management interface.
**/
private Class mbeanInterface;
/**
* The implementation.
**/
private Object implementation;
/**
* The MetaData object used for invoking reflection.
**/
private final StandardMBeanMetaDataImpl meta;
/**
* The cached MBeanInfo.
**/
private MBeanInfo cachedMBeanInfo;
/**
* Make a DynamicMBean out of <var>implementation</var>, using the
* specified <var>mbeanInterface</var> class.
* @param implementation The implementation of this MBean.
* If <code>null</code>, and null implementation is allowed,
* then the implementation is assumed to be <var>this</var>.
* @param mbeanInterface The Management Interface exported by this
* MBean's implementation. If <code>null</code>, then this
* object will use standard JMX design pattern to determine
* the management interface associated with the given
* implementation.
* @param nullImplementationAllowed <code>true</code> if a null
* implementation is allowed. If null implementation is allowed,
* and a null implementation is passed, then the implementation
* is assumed to be <var>this</var>.
* @exception IllegalArgumentException if the given
* <var>implementation</var> is null, and null is not allowed.
* @exception NotCompliantMBeanException if the <var>mbeanInterface</var>
* does not follow JMX design patterns for Management Interfaces, or
* if the given <var>implementation</var> does not implement the
* specified interface.
**/
private StandardMBean(Object implementation, Class mbeanInterface,
boolean nullImplementationAllowed)
throws NotCompliantMBeanException {
if (implementation == null) {
if (nullImplementationAllowed) implementation = this;
else throw new IllegalArgumentException("implementation is null");
}
this.meta = new StandardMBeanMetaDataImpl(this);
setImplementation(implementation,mbeanInterface);
}
/**
* <p>Make a DynamicMBean out of the object
* <var>implementation</var>, using the specified
* <var>mbeanInterface</var> class.</p>
*
* @param implementation The implementation of this MBean.
* @param mbeanInterface The Management Interface exported by this
* MBean's implementation. If <code>null</code>, then this
* object will use standard JMX design pattern to determine
* the management interface associated with the given
* implementation.
*
* @exception IllegalArgumentException if the given
* <var>implementation</var> is null.
* @exception NotCompliantMBeanException if the <var>mbeanInterface</var>
* does not follow JMX design patterns for Management Interfaces, or
* if the given <var>implementation</var> does not implement the
* specified interface.
**/
public StandardMBean(Object implementation,Class mbeanInterface)
throws NotCompliantMBeanException {
this(implementation,mbeanInterface,false);
}
/**
* <p>Make a DynamicMBean out of <var>this</var>, using the specified
* <var>mbeanInterface</var> class.</p>
*
* <p>Call {@link #StandardMBean(java.lang.Object, java.lang.Class)
* this(this,mbeanInterface)}.
* This constructor is reserved to subclasses.</p>
*
* @param mbeanInterface The Management Interface exported by this
* MBean.
*
* @exception NotCompliantMBeanException if the <var>mbeanInterface</var>
* does not follow JMX design patterns for Management Interfaces, or
* if <var>this</var> does not implement the specified interface.
**/
protected StandardMBean(Class mbeanInterface)
throws NotCompliantMBeanException {
this(null,mbeanInterface,true);
}
/**
* <p>Replace the implementation object wrapped in this
* object.</p>
*
* @param implementation The new implementation of this MBean.
* The <code>implementation</code> object must implement the MBean
* interface that was supplied when this
* <code>StandardMBean</code> was constructed.
*
* @exception IllegalArgumentException if the given
* <var>implementation</var> is null.
*
* @exception NotCompliantMBeanException if the given
* <var>implementation</var> does not implement the MBean
* interface that was supplied at construction.
*
* @see #getImplementation
**/
public synchronized void setImplementation(Object implementation)
throws NotCompliantMBeanException {
setImplementation(implementation, getMBeanInterface());
}
/**
* Replace the implementation and management interface wrapped in
* this object.
* @param implementation The new implementation of this MBean.
* @param mbeanInterface The Management Interface exported by this
* MBean's implementation. If <code>null</code>, then this
* object will use standard JMX design patterns to determine
* the management interface associated with the given
* implementation.
* @exception IllegalArgumentException if the given
* <var>implementation</var> is null.
* @exception NotCompliantMBeanException if the <var>mbeanInterface</var>
* does not follow JMX design patterns for Management Interfaces, or
* if the given <var>implementation</var> does not implement the
* specified interface.
**/
private synchronized void setImplementation(Object implementation,
Class mbeanInterface)
throws NotCompliantMBeanException {
if (implementation == null)
throw new IllegalArgumentException("implementation is null");
// test compliance
this.meta.testCompliance(implementation.getClass(),mbeanInterface);
// flush the cache...
cacheMBeanInfo(null);
this.implementation = implementation;
this.mbeanInterface = mbeanInterface;
if (this.mbeanInterface == null)
this.mbeanInterface =
meta.getStandardMBeanInterface(implementation.getClass());
}
/**
* Get the implementation of this MBean.
* @return The implementation of this MBean.
*
* @see #setImplementation
**/
public synchronized Object getImplementation() {
return implementation;
}
/**
* Get the Management Interface of this MBean.
* @return The management interface of this MBean.
**/
public final synchronized Class getMBeanInterface() {
return mbeanInterface;
}
/**
* Get the class of the implementation of this MBean.
* @return The class of the implementation of this MBean.
**/
public synchronized Class getImplementationClass() {
if (implementation == null) return null;
return implementation.getClass();
}
// ------------------------------------------------------------------
// From the DynamicMBean interface.
// ------------------------------------------------------------------
public Object getAttribute(String attribute)
throws AttributeNotFoundException,
MBeanException, ReflectionException {
return meta.getAttribute(getImplementation(),attribute);
}
// ------------------------------------------------------------------
// From the DynamicMBean interface.
// ------------------------------------------------------------------
public void setAttribute(Attribute attribute)
throws AttributeNotFoundException,
InvalidAttributeValueException, MBeanException,
ReflectionException {
meta.setAttribute(getImplementation(),attribute);
}
// ------------------------------------------------------------------
// From the DynamicMBean interface.
// ------------------------------------------------------------------
public AttributeList getAttributes(String[] attributes) {
try {
return meta.getAttributes(getImplementation(),attributes);
} catch (ReflectionException x) {
final RuntimeException r =
new UndeclaredThrowableException(x,x.getMessage());
throw new RuntimeOperationsException(r,x.getMessage());
}
}
// ------------------------------------------------------------------
// From the DynamicMBean interface.
// ------------------------------------------------------------------
public AttributeList setAttributes(AttributeList attributes) {
try {
return meta.setAttributes(getImplementation(),attributes);
} catch (ReflectionException x) {
final RuntimeException r =
new UndeclaredThrowableException(x,x.getMessage());
throw new RuntimeOperationsException(r,x.getMessage());
}
}
// ------------------------------------------------------------------
// From the DynamicMBean interface.
// ------------------------------------------------------------------
public Object invoke(String actionName, Object params[],
String signature[])
throws MBeanException, ReflectionException {
return meta.invoke(getImplementation(),actionName,params,signature);
}
/**
* Get the {@link MBeanInfo} for this MBean.
* <p>
* This method implements
* {@link javax.management.DynamicMBean#getMBeanInfo()
* DynamicMBean.getMBeanInfo()}.
* <p>
* This method first calls {@link #getCachedMBeanInfo()} in order to
* retrieve the cached MBeanInfo for this MBean, if any. If the
* MBeanInfo returned by {@link #getCachedMBeanInfo()} is not null,
* then it is returned.<br>
* Otherwise, this method builds a default MBeanInfo for this MBean,
* using the Management Interface specified for this MBean.
* <p>
* While building the MBeanInfo, this method calls the customization
* hooks that make it possible for subclasses to supply their custom
* descriptions, parameter names, etc...<br>
* Finally, it calls {@link #cacheMBeanInfo(javax.management.MBeanInfo)
* cacheMBeanInfo()} in order to cache the new MBeanInfo.
* @return The cached MBeanInfo for that MBean, if not null, or a
* newly built MBeanInfo if none was cached.
**/
public MBeanInfo getMBeanInfo() {
try {
final MBeanInfo cached = getCachedMBeanInfo();
if (cached != null) return (MBeanInfo)cached;
} catch (RuntimeException x) {
debug("getMBeanInfo","failed to get cached MBeanInfo: "+x);
debugX("getMBeanInfo",x);
}
if (isTraceOn()) {
trace("getMBeanInfo", "Building MBeanInfo for "+
getImplementationClass().getName());
}
final MBeanInfo bi;
final Object impl;
try {
synchronized (this) {
impl = getImplementation();
bi = buildStandardMBeanInfo();
}
} catch (NotCompliantMBeanException x) {
final RuntimeException r =
new UndeclaredThrowableException(x,x.getMessage());
throw new RuntimeOperationsException(r,x.getMessage());
}
final String cname = getClassName(bi);
final String text = getDescription(bi);
final MBeanConstructorInfo[] ctors = getConstructors(bi,impl);
final MBeanAttributeInfo[] attrs = getAttributes(bi);
final MBeanOperationInfo[] ops = getOperations(bi);
final MBeanNotificationInfo[] ntfs = getNotifications(bi);
final MBeanInfo nmbi =
new MBeanInfo(cname,text,attrs,ctors,ops,ntfs);
try { cacheMBeanInfo(nmbi); } catch (RuntimeException x) {
debug("cacheMBeanInfo","failed to cache MBeanInfo: "+x);
debugX("cacheMBeanInfo",x);
}
return nmbi;
}
/**
* Customization hook:
* Get the className that will be used in the MBeanInfo returned by
* this MBean.
* <br>
* Subclasses may redefine this method in order to supply their
* custom class name. The default implementation returns
* {@link MBeanInfo#getClassName() info.getClassName()}.
* @param info The default MBeanInfo derived by reflection.
* @return the class name for the new MBeanInfo.
**/
protected String getClassName(MBeanInfo info) {
if (info == null) return getImplementationClass().getName();
return info.getClassName();
}
/**
* Customization hook:
* Get the description that will be used in the MBeanInfo returned by
* this MBean.
* <br>
* Subclasses may redefine this method in order to supply their
* custom MBean description. The default implementation returns
* {@link MBeanInfo#getDescription() info.getDescription()}.
* @param info The default MBeanInfo derived by reflection.
* @return the description for the new MBeanInfo.
**/
protected String getDescription(MBeanInfo info) {
if (info == null) return null;
return info.getDescription();
}
/**
* <p>Customization hook:
* Get the description that will be used in the MBeanFeatureInfo
* returned by this MBean.</p>
*
* <p>Subclasses may redefine this method in order to supply
* their custom description. The default implementation returns
* {@link MBeanFeatureInfo#getDescription()
* info.getDescription()}.</p>
*
* <p>This method is called by
* {@link #getDescription(MBeanAttributeInfo)},
* {@link #getDescription(MBeanOperationInfo)},
* {@link #getDescription(MBeanConstructorInfo)}.</p>
*
* @param info The default MBeanFeatureInfo derived by reflection.
* @return the description for the given MBeanFeatureInfo.
**/
protected String getDescription(MBeanFeatureInfo info) {
if (info == null) return null;
return info.getDescription();
}
/**
* Customization hook:
* Get the description that will be used in the MBeanAttributeInfo
* returned by this MBean.
*
* <p>Subclasses may redefine this method in order to supply their
* custom description. The default implementation returns {@link
* #getDescription(MBeanFeatureInfo)
* getDescription((MBeanFeatureInfo) info)}.
* @param info The default MBeanAttributeInfo derived by reflection.
* @return the description for the given MBeanAttributeInfo.
**/
protected String getDescription(MBeanAttributeInfo info) {
return getDescription((MBeanFeatureInfo)info);
}
/**
* Customization hook:
* Get the description that will be used in the MBeanConstructorInfo
* returned by this MBean.
* <br>
* Subclasses may redefine this method in order to supply their
* custom description.
* The default implementation returns {@link
* #getDescription(MBeanFeatureInfo)
* getDescription((MBeanFeatureInfo) info)}.
* @param info The default MBeanConstructorInfo derived by reflection.
* @return the description for the given MBeanConstructorInfo.
**/
protected String getDescription(MBeanConstructorInfo info) {
return getDescription((MBeanFeatureInfo)info);
}
/**
* Customization hook:
* Get the description that will be used for the <var>sequence</var>
* MBeanParameterInfo of the MBeanConstructorInfo returned by this MBean.
* <br>
* Subclasses may redefine this method in order to supply their
* custom description. The default implementation returns
* {@link MBeanParameterInfo#getDescription() param.getDescription()}.
*
* @param ctor The default MBeanConstructorInfo derived by reflection.
* @param param The default MBeanParameterInfo derived by reflection.
* @param sequence The sequence number of the parameter considered
* ("0" for the first parameter, "1" for the second parameter,
* etc...).
* @return the description for the given MBeanParameterInfo.
**/
protected String getDescription(MBeanConstructorInfo ctor,
MBeanParameterInfo param,
int sequence) {
if (param == null) return null;
return param.getDescription();
}
/**
* Customization hook:
* Get the name that will be used for the <var>sequence</var>
* MBeanParameterInfo of the MBeanConstructorInfo returned by this MBean.
* <br>
* Subclasses may redefine this method in order to supply their
* custom parameter name. The default implementation returns
* {@link MBeanParameterInfo#getName() param.getName()}.
*
* @param ctor The default MBeanConstructorInfo derived by reflection.
* @param param The default MBeanParameterInfo derived by reflection.
* @param sequence The sequence number of the parameter considered
* ("0" for the first parameter, "1" for the second parameter,
* etc...).
* @return the name for the given MBeanParameterInfo.
**/
protected String getParameterName(MBeanConstructorInfo ctor,
MBeanParameterInfo param,
int sequence) {
if (param == null) return null;
return param.getName();
}
/**
* Customization hook:
* Get the description that will be used in the MBeanOperationInfo
* returned by this MBean.
* <br>
* Subclasses may redefine this method in order to supply their
* custom description. The default implementation returns
* {@link #getDescription(MBeanFeatureInfo)
* getDescription((MBeanFeatureInfo) info)}.
* @param info The default MBeanOperationInfo derived by reflection.
* @return the description for the given MBeanOperationInfo.
**/
protected String getDescription(MBeanOperationInfo info) {
return getDescription((MBeanFeatureInfo)info);
}
/**
* Customization hook:
* Get the <var>impact</var> flag of the operation that will be used in
* the MBeanOperationInfo returned by this MBean.
* <br>
* Subclasses may redefine this method in order to supply their
* custom impact flag. The default implementation returns
* {@link MBeanOperationInfo#getImpact() info.getImpact()}.
* @param info The default MBeanOperationInfo derived by reflection.
* @return the impact flag for the given MBeanOperationInfo.
**/
protected int getImpact(MBeanOperationInfo info) {
if (info == null) return MBeanOperationInfo.UNKNOWN;
return info.getImpact();
}
/**
* Customization hook:
* Get the name that will be used for the <var>sequence</var>
* MBeanParameterInfo of the MBeanOperationInfo returned by this MBean.
* <br>
* Subclasses may redefine this method in order to supply their
* custom parameter name. The default implementation returns
* {@link MBeanParameterInfo#getName() param.getName()}.
*
* @param op The default MBeanOperationInfo derived by reflection.
* @param param The default MBeanParameterInfo derived by reflection.
* @param sequence The sequence number of the parameter considered
* ("0" for the first parameter, "1" for the second parameter,
* etc...).
* @return the name to use for the given MBeanParameterInfo.
**/
protected String getParameterName(MBeanOperationInfo op,
MBeanParameterInfo param,
int sequence) {
if (param == null) return null;
return param.getName();
}
/**
* Customization hook:
* Get the description that will be used for the <var>sequence</var>
* MBeanParameterInfo of the MBeanOperationInfo returned by this MBean.
* <br>
* Subclasses may redefine this method in order to supply their
* custom description. The default implementation returns
* {@link MBeanParameterInfo#getDescription() param.getDescription()}.
*
* @param op The default MBeanOperationInfo derived by reflection.
* @param param The default MBeanParameterInfo derived by reflection.
* @param sequence The sequence number of the parameter considered
* ("0" for the first parameter, "1" for the second parameter,
* etc...).
* @return the description for the given MBeanParameterInfo.
**/
protected String getDescription(MBeanOperationInfo op,
MBeanParameterInfo param,
int sequence) {
if (param == null) return null;
return param.getDescription();
}
/**
* Customization hook:
* Get the MBeanConstructorInfo[] that will be used in the MBeanInfo
* returned by this MBean.
* <br>
* By default, this method returns <code>null</code> if the wrapped
* implementation is not <var>this</var>. Indeed, if the wrapped
* implementation is not this object itself, it will not be possible
* to recreate a wrapped implementation by calling the implementation
* constructors through <code>MBeanServer.createMBean(...)</code>.<br>
* Otherwise, if the wrapped implementation is <var>this</var>,
* <var>ctors</var> is returned.
* <br>
* Subclasses may redefine this method in order to modify this
* behavior, if needed.
* @param ctors The default MBeanConstructorInfo[] derived by reflection.
* @param impl The wrapped implementation. If <code>null</code> is
* passed, the wrapped implementation is ignored and
* <var>ctors</var> is returned.
* @return the MBeanConstructorInfo[] for the new MBeanInfo.
**/
protected MBeanConstructorInfo[]
getConstructors(MBeanConstructorInfo[] ctors, Object impl) {
if (ctors == null) return null;
if (impl != null && impl != this) return null;
return ctors;
}
/**
* Customization hook:
* Get the MBeanNotificationInfo[] that will be used in the MBeanInfo
* returned by this MBean.
* <br>
* Subclasses may redefine this method in order to supply their
* custom notifications.
* @param info The default MBeanInfo derived by reflection.
* @return the MBeanNotificationInfo[] for the new MBeanInfo.
**/
// Private because not needed - the StandardMBeanMetaDataImpl already
// calls getNotificationInfo() on the implementation....
private MBeanNotificationInfo[]
getNotifications(MBeanInfo info) {
if (info == null) return null;
return info.getNotifications();
}
/**
* Customization hook:
* Return the MBeanInfo cached for this object.
*
* <p>Subclasses may redefine this method in order to implement their
* own caching policy. The default implementation stores one
* {@link MBeanInfo} object per instance.
*
* @return The cached MBeanInfo, or null if no MBeanInfo is cached.
*
* @see #cacheMBeanInfo(MBeanInfo)
**/
protected synchronized MBeanInfo getCachedMBeanInfo() {
return cachedMBeanInfo;
}
/**
* Customization hook:
* cache the MBeanInfo built for this object.
*
* <p>Subclasses may redefine this method in order to implement
* their own caching policy. The default implementation stores
* <code>info</code> in this instance. A subclass can define
* other policies, such as not saving <code>info</code> (so it is
* reconstructed every time {@link #getMBeanInfo()} is called) or
* sharing a unique {@link MBeanInfo} object when several
* <code>StandardMBean</code> instances have equal {@link
* MBeanInfo} values.
*
* @param info the new <code>MBeanInfo</code> to cache. Any
* previously cached value is discarded. This parameter may be
* null, in which case there is no new cached value.
**/
protected synchronized void cacheMBeanInfo(MBeanInfo info) {
cachedMBeanInfo = info;
}
// ------------------------------------------------------------------
// Build the defaullt standard MBeanInfo.
// ------------------------------------------------------------------
private synchronized MBeanInfo buildStandardMBeanInfo()
throws NotCompliantMBeanException {
return meta.buildMBeanInfo(getImplementationClass(),
getMBeanInterface());
}
// ------------------------------------------------------------------
// Build the custom MBeanConstructorInfo[]
// ------------------------------------------------------------------
private MBeanConstructorInfo[]
getConstructors(MBeanInfo info,Object impl) {
final MBeanConstructorInfo[] ctors =
getConstructors(info.getConstructors(),impl);
final MBeanConstructorInfo[] nctors;
if (ctors != null) {
final int ctorlen = ctors.length;
nctors = new MBeanConstructorInfo[ctorlen];
for (int i=0; i<ctorlen; i++) {
final MBeanConstructorInfo c = ctors[i];
final MBeanParameterInfo[] params = c.getSignature();
final MBeanParameterInfo[] nps;
if (params != null) {
final int plen = params.length;
nps = new MBeanParameterInfo[plen];
for (int ii=0;ii<plen;ii++) {
MBeanParameterInfo p = params[ii];
final String name = getParameterName(c,p,ii);
final String text = getDescription(c,p,ii);
nps[ii] = new MBeanParameterInfo(name,
p.getType(),
text);
}
} else {
nps = null;
}
nctors[i] = new MBeanConstructorInfo(c.getName(),
getDescription(c),
nps);
}
} else {
nctors = null;
}
return nctors;
}
// ------------------------------------------------------------------
// Build the custom MBeanOperationInfo[]
// ------------------------------------------------------------------
private MBeanOperationInfo[] getOperations(MBeanInfo info) {
final MBeanOperationInfo[] ops = info.getOperations();
final MBeanOperationInfo[] nops;
if (ops != null) {
final int oplen = ops.length;
nops = new MBeanOperationInfo[oplen];
for (int i=0; i<oplen; i++) {
final MBeanOperationInfo o = ops[i];
final MBeanParameterInfo[] params = o.getSignature();
final MBeanParameterInfo[] nps;
if (params != null) {
final int plen = params.length;
nps = new MBeanParameterInfo[plen];
for (int ii=0;ii<plen;ii++) {
MBeanParameterInfo p = params[ii];
final String name = getParameterName(o,p,ii);
final String text = getDescription(o,p,ii);
nps[ii] = new MBeanParameterInfo(name,
p.getType(),
text);
}
} else {
nps = null;
}
nops[i] = new MBeanOperationInfo(o.getName(),
getDescription(o),
nps,
o.getReturnType(),
getImpact(o));
}
} else {
nops = null;
}
return nops;
}
// ------------------------------------------------------------------
// Build the custom MBeanAttributeInfo[]
// ------------------------------------------------------------------
private MBeanAttributeInfo[] getAttributes(MBeanInfo info) {
final MBeanAttributeInfo[] atts = info.getAttributes();
final MBeanAttributeInfo[] natts;
if (atts != null) {
final int attlen = atts.length;
natts = new MBeanAttributeInfo[attlen];
for (int i=0; i<attlen; i++) {
final MBeanAttributeInfo a = atts[i];
natts[i] = new MBeanAttributeInfo(a.getName(),
a.getType(),
getDescription(a),
a.isReadable(),
a.isWritable(),
a.isIs());
}
} else {
natts = null;
}
return natts;
}
// private stuff
private static boolean isTraceOn() {
return Trace.isSelected(Trace.LEVEL_TRACE, Trace.INFO_MISC);
}
private static void trace(String clz, String func, String info) {
Trace.send(Trace.LEVEL_TRACE, Trace.INFO_MISC, clz, func, info);
}
private static void trace(String func, String info) {
trace(dbgTag, func, info);
}
private static boolean isDebugOn() {
return Trace.isSelected(Trace.LEVEL_DEBUG, Trace.INFO_MISC);
}
private static void debug(String clz, String func, String info) {
Trace.send(Trace.LEVEL_DEBUG, Trace.INFO_MISC, clz, func, info);
}
private static void debug(String func, String info) {
debug(dbgTag, func, info);
}
private static void debugX(String func,Throwable e) {
if (isDebugOn()) {
final StringWriter s = new StringWriter();
e.printStackTrace(new PrintWriter(s));
final String stack = s.toString();
debug(dbgTag,func,"Exception caught in "+ func+"(): "+e);
debug(dbgTag,func,stack);
// java.lang.System.err.println("**** Exception caught in "+
// func+"(): "+e);
// java.lang.System.err.println(stack);
}
}
}
|
