Examples of javax.management.AttributeList

javax.management.AttributeList
A list of a MBean attributes.
An AttributeList can be used to get and set multiple MBean attributes in one invocation.
It is an array list that can only contain {@link javax.management.Attribute}s
Note: AttributeLists must be externally synchronized. @see javax.management.Attribute @author Adrian Brock. @version $Revision: 1.2 $

    }


    @Override
    public AttributeList getAttributes(final String[] attributes)
    {
        final AttributeList list = new AttributeList();
        for (String n : attributes)
        {
            try
            {
                list.add(new Attribute(n, getAttribute(n)));
            }
            catch (Exception ignore)
            {
                // no-op
            }

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    }


    @Override
    public AttributeList setAttributes(final AttributeList attributes)
    {
        final AttributeList list = new AttributeList();
        for (Object o : attributes)
        {
            final Attribute attr = (Attribute) o;
            try
            {
                setAttribute(attr);
                list.add(attr);
            }
            catch (Exception ignore)
            {
                // no-op
            }

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        objName = new ObjectName("org.apache.flume.source"
          + ":type=" + source.getName());


        MBeanServer mbeanServer = ManagementFactory.getPlatformMBeanServer();
        String strAtts[] = {"Type", "EventReceivedCount", "EventAcceptedCount"};
        AttributeList attrList = mbeanServer.getAttributes(objName, strAtts);


        Assert.assertNotNull(attrList.get(0));
        Assert.assertEquals("Expected Value: Type", "Type",
                ((Attribute) attrList.get(0)).getName());
        Assert.assertEquals("Expected Value: SOURCE", "SOURCE",
                ((Attribute) attrList.get(0)).getValue());


        Assert.assertNotNull(attrList.get(1));
        Assert.assertEquals("Expected Value: EventReceivedCount", "EventReceivedCount",
                ((Attribute) attrList.get(1)).getName());
        Assert.assertEquals("Expected Value: 5", "5",
                ((Attribute) attrList.get(1)).getValue().toString());


        Assert.assertNotNull(attrList.get(2));
        Assert.assertEquals("Expected Value: EventAcceptedCount", "EventAcceptedCount",
                ((Attribute) attrList.get(2)).getName());
        Assert.assertEquals("Expected Value: 5", "5",
                ((Attribute) attrList.get(2)).getValue().toString());


    } catch (Exception ex) {
      System.out.println("Unable to retreive the monitored counter: "
          + objName + ex.getMessage());
    }

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        }
    }


    public AttributeList getAttributes(ObjectName name, String[] attributes) throws InstanceNotFoundException, ReflectionException {
        AbstractName abstractName = toAbstractName(name);
        AttributeList attributeList = new AttributeList(attributes.length);
        for (int i = 0; i < attributes.length; i++) {
            String attribute = attributes[i];
            try {
                Object value = kernel.getAttribute(abstractName, attribute);
                attributeList.add(i, new Attribute(attribute, value));
            } catch (NoSuchAttributeException e) {
                // ignored - caller will simply find no value
            } catch (GBeanNotFoundException e) {
                throw (InstanceNotFoundException)new InstanceNotFoundException(name.getCanonicalName()).initCause(e);
            } catch (InternalKernelException e) {

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        }
    }


    public AttributeList setAttributes(ObjectName name, AttributeList attributes) throws InstanceNotFoundException, ReflectionException {
        AbstractName abstractName = toAbstractName(name);
        AttributeList set = new AttributeList(attributes.size());
        for (Iterator iterator = attributes.iterator(); iterator.hasNext();) {
            Attribute attribute = (Attribute) iterator.next();
            String attributeName = attribute.getName();
            Object attributeValue = attribute.getValue();
            try {
                kernel.setAttribute(abstractName, attributeName, attributeValue);
                set.add(attribute);
            } catch (NoSuchAttributeException e) {
                // ignored - caller will see value was not set because this attribute will not be in the attribute list
            } catch (GBeanNotFoundException e) {
                throw (InstanceNotFoundException)new InstanceNotFoundException(name.getCanonicalName()).initCause(e);
            } catch (InternalKernelException e) {

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        setNamedAttribute(attribute);
    }


    public synchronized AttributeList getAttributes(String[] names) {       
        AttributeList al=new AttributeList();
        for(String name:names) {
            Attribute attr=getNamedAttribute(name);
            if(attr != null) {
                al.add(attr);
            }
            else {
                log.warn("Did not find attribute " + name);
            }
        }

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        }
        return al;
    }


    public synchronized AttributeList setAttributes(AttributeList list) {        
        AttributeList results=new AttributeList();
        for(int i=0;i < list.size();i++) {
            Attribute attr=(Attribute)list.get(i);


            if(log.isDebugEnabled()) {
                log.debug("Attribute name " + attr.getName() + " new value is " + attr.getValue());
            }


            if(setNamedAttribute(attr)) {
                results.add(attr);
            }
            else {
                if(log.isWarnEnabled()) {
                    log.debug("Failed to update attribute name " + attr.getName()
                              + " with value "

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      setNamedAttribute(attribute);
   }


   @Override
   public synchronized AttributeList getAttributes(String[] names) {
      AttributeList al = new AttributeList();
      for (String name : names) {
         Attribute attr = getNamedAttribute(name);
         if (attr != null) {
            al.add(attr);
         } else {
            log.couldNotFindAttribute(name);
         }
      }
      return al;

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      return al;
   }


   @Override
   public synchronized AttributeList setAttributes(AttributeList list) {
      AttributeList results = new AttributeList();
      for (Object aList : list) {
         Attribute attr = (Attribute) aList;


         try {
            setNamedAttribute(attr);
            results.add(attr);
         } catch (Exception e) {
            log.failedToUpdateAttribute(attr.getName(), attr.getValue());
         }
      }
      return results;

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            throw new RuntimeOperationsException
                (new IllegalArgumentException("Attribute names list is null"),
                 "Attribute names list is null");


        // Prepare our response, eating all exceptions
        AttributeList response = new AttributeList();
        for (int i = 0; i < names.length; i++) {
            try {
                response.add(new Attribute(names[i],getAttribute(names[i])));
            } catch (Exception e) {
                ; // Not having a particular attribute in the response
                ; // is the indication of a getter problem
            }
        }

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