Examples of javax.management.monitor.MonitorNotification

javax.management.monitor.MonitorNotification
A notification from one of the monitor services.
The notification occurs only when the state is first entered.
All monitor services produce the following notifications.
- {@link #OBSERVED_OBJECT_ERROR} when the MBean is not registered.
- {@link #OBSERVED_ATTRIBUTE_ERROR} when the MBean's attribute doesnot exist.
- {@link #OBSERVED_ATTRIBUTE_TYPE_ERROR} when the MBean's attribute isnot of the correct type for the monitor or the derived gauge value.
- {@link #RUNTIME_ERROR} for any other error.
The counter monitor produces the following notifications.
- {@link #THRESHOLD_ERROR} when one of the monitors threshold vaues is of an incorrect type.
- {@link #THRESHOLD_VALUE_EXCEEDED} when the counter exceeds the threshold.
The gauge monitor produces the following notifications.
- {@link #THRESHOLD_ERROR} when one of the monitors threshold vaues is of an incorrect type.
- {@link #THRESHOLD_HIGH_VALUE_EXCEEDED} when the attribute exceedsthe high threshold value.
- {@link #THRESHOLD_LOW_VALUE_EXCEEDED} when the attribute exceedsthe low threshold value.
The string monitor produces the following notifications.
- {@link #STRING_TO_COMPARE_VALUE_DIFFERED} when the attribute no longermatches the specified value.
- {@link #STRING_TO_COMPARE_VALUE_DIFFERED} when the attribute matches the specified value.
@author Adrian Brock @version $Revision: 1.2 $
Revisions:
20020816 Adrian Brock:
- Serialization

      assertEquals(0, notifications.size());
      monitor.setObservedAttribute("rubbish");
      monitor.start();
      sync(false);
      assertEquals(1, notifications.size());
      MonitorNotification n = (MonitorNotification) notifications.get(0);
      notifications.clear();
      assertEquals(monitorName, n.getSource());
      assertEquals(monitoredName, n.getObservedObject());
      assertEquals("rubbish", n.getObservedAttribute());
      assertEquals(MonitorNotification.OBSERVED_ATTRIBUTE_ERROR, n.getType());
      n = serializeDeserialize(n);
      assertEquals(monitorName, n.getSource());
      assertEquals(monitoredName, n.getObservedObject());
      assertEquals("rubbish", n.getObservedAttribute());
      assertEquals(MonitorNotification.OBSERVED_ATTRIBUTE_ERROR, n.getType());
   }

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      assertEquals(0, notifications.size());
      monitor.setObservedAttribute("WrongNull");
      monitor.start();
      sync(false);
      assertEquals(1, notifications.size());
      MonitorNotification n = (MonitorNotification) notifications.get(0);
      notifications.clear();
      assertEquals(monitorName, n.getSource());
      assertEquals(monitoredName, n.getObservedObject());
      assertEquals("WrongNull", n.getObservedAttribute());
      assertEquals(MonitorNotification.OBSERVED_ATTRIBUTE_TYPE_ERROR,
                   n.getType());
      n = serializeDeserialize(n);
      assertEquals(monitorName, n.getSource());
      assertEquals(monitoredName, n.getObservedObject());
      assertEquals("WrongNull", n.getObservedAttribute());
      assertEquals(MonitorNotification.OBSERVED_ATTRIBUTE_TYPE_ERROR,
                   n.getType());
   }

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      assertEquals(0, notifications.size());
      monitor.setObservedAttribute("WrongType");
      monitor.start();
      sync(false);
      assertEquals(1, notifications.size());
      MonitorNotification n = (MonitorNotification) notifications.get(0);
      notifications.clear();
      assertEquals(monitorName, n.getSource());
      assertEquals(monitoredName, n.getObservedObject());
      assertEquals("WrongType", n.getObservedAttribute());
      assertEquals(MonitorNotification.OBSERVED_ATTRIBUTE_TYPE_ERROR,
                   n.getType());
      n = serializeDeserialize(n);
      assertEquals(monitoredName, n.getObservedObject());
      assertEquals("WrongType", n.getObservedAttribute());
      assertEquals(MonitorNotification.OBSERVED_ATTRIBUTE_TYPE_ERROR,
                   n.getType());
   }

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      assertEquals(0, notifications.size());
      monitor.setObservedAttribute("WriteOnly");
      monitor.start();
      sync(false);
      assertEquals(1, notifications.size());
      MonitorNotification n = (MonitorNotification) notifications.get(0);
      notifications.clear();
      assertEquals(monitorName, n.getSource());
      assertEquals(monitoredName, n.getObservedObject());
      assertEquals("WriteOnly", n.getObservedAttribute());
      assertEquals(MonitorNotification.OBSERVED_ATTRIBUTE_ERROR,
                   n.getType());
      n = serializeDeserialize(n);
      assertEquals(monitorName, n.getSource());
      assertEquals(monitoredName, n.getObservedObject());
      assertEquals("WriteOnly", n.getObservedAttribute());
      assertEquals(MonitorNotification.OBSERVED_ATTRIBUTE_ERROR,
                   n.getType());
   }

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      monitoredName = new ObjectName("rubbish:type=pants");
      monitor.setObservedObject(monitoredName);
      monitor.start();
      sync(false);
      assertEquals(1, notifications.size());
      MonitorNotification n = (MonitorNotification) notifications.get(0);
      notifications.clear();
      assertEquals(monitorName, n.getSource());
      assertEquals(monitoredName, n.getObservedObject());
      assertEquals("Value", n.getObservedAttribute());
      assertEquals(MonitorNotification.OBSERVED_OBJECT_ERROR,
                   n.getType());
      n = serializeDeserialize(n);
      assertEquals(monitorName, n.getSource());
      assertEquals(monitoredName, n.getObservedObject());
      assertEquals("Value", n.getObservedAttribute());
      assertEquals(MonitorNotification.OBSERVED_OBJECT_ERROR,
                   n.getType());
   }

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   {
      assertEquals(0, notifications.size());
      monitor.start();
      sync(false);
      assertEquals(1, notifications.size());
      MonitorNotification n = (MonitorNotification) notifications.get(0);
      notifications.clear();
      assertEquals(monitorName, n.getSource());
      assertEquals(monitoredName, n.getObservedObject());
      assertEquals("Value", n.getObservedAttribute());
      assertEquals(MonitorNotification.THRESHOLD_ERROR,
                   n.getType());
      n = serializeDeserialize(n);
      assertEquals(monitorName, n.getSource());
      assertEquals(monitoredName, n.getObservedObject());
      assertEquals("Value", n.getObservedAttribute());
      assertEquals(MonitorNotification.THRESHOLD_ERROR,
                   n.getType());
   }

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      monitor.start();
      sync(false);
      if (notifications.size() != 1)
         fail ("FAILS IN RI: Does not notify of error thrown by getter");
      assertEquals(1, notifications.size());
      MonitorNotification n = (MonitorNotification) notifications.get(0);
      notifications.clear();
      assertEquals(monitorName, n.getSource());
      assertEquals(monitoredName, n.getObservedObject());
      assertEquals("WrongException", n.getObservedAttribute());
      assertEquals(MonitorNotification.RUNTIME_ERROR,
                   n.getType());
      n = serializeDeserialize(n);
      assertEquals(monitorName, n.getSource());
      assertEquals(monitoredName, n.getObservedObject());
      assertEquals("WrongException", n.getObservedAttribute());
      assertEquals(MonitorNotification.RUNTIME_ERROR,
                   n.getType());
   }

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      sync(true);


      // Check the result
      checkGauge(expected);
      assertEquals(1, notifications.size());
      MonitorNotification n = (MonitorNotification) notifications.get(0);
      notifications.clear();
      assertEquals(monitorName, n.getSource());
      assertEquals(monitoredName, n.getObservedObject());
      assertEquals("Value", n.getObservedAttribute());
      assertEquals(type, n.getType());
      assertEquals(expected, n.getDerivedGauge());
      n = serializeDeserialize(n);
      assertEquals(monitorName, n.getSource());
      assertEquals(monitoredName, n.getObservedObject());
      assertEquals("Value", n.getObservedAttribute());
      assertEquals(type, n.getType());
      assertEquals(expected, n.getDerivedGauge());
   }

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      sync(true);


      // Check the result
      checkGauge(gauge);
      assertEquals(1, notifications.size());
      MonitorNotification n = (MonitorNotification) notifications.get(0);
      notifications.clear();
      assertEquals(monitorName, n.getSource());
      assertEquals(monitoredName, n.getObservedObject());
      assertEquals("Value", n.getObservedAttribute());
      assertEquals(type, n.getType());
      assertEquals(gauge, n.getDerivedGauge());
   }

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      sync(true);


      // Check the result
      checkGauge(sub(value2, value1));
      assertEquals(1, notifications.size());
      MonitorNotification n = (MonitorNotification) notifications.get(0);
      notifications.clear();
      assertEquals(monitorName, n.getSource());
      assertEquals(monitoredName, n.getObservedObject());
      assertEquals("Value", n.getObservedAttribute());
      assertEquals(type, n.getType());
      assertEquals(sub(value2, value1), n.getDerivedGauge());
   }

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