# SNMPAttributeChangeMBean

Overview | Related MBeans | Attributes | Operations

## Overview

This class describes the settings to receive MBean-attribute change trap.

Fully Qualified Interface Name | If you use the `getMBeanInfo` operation in MBeanTypeServiceMBean, supply the following value as this MBean's fully qualified interface name: `weblogic.management.configuration.SNMPAttributeChangeMBean`
Factory Methods | Factory methods in SNMPAgentMBean

## Related MBeans

This section describes attributes that provide access to other MBeans. For more information about the MBean hierarchy, refer to WebLogic Server MBean Data Model.

EnabledServers |

### EnabledServers

The list of target servers for trap generation. If no server is specified, no trap will be generated.

Privileges | Read/Write
Type | ServerMBean[]
Relationship type: | Reference.
Redeploy or Restart required | Changes take effect after you redeploy the module or restart the server.

## Attributes

This section describes the following attributes:

AttributeMBeanName AttributeMBeanType AttributeName Name | Notes Parent Type

### AttributeMBeanName

The name of the MBean instance that you want to monitor. If you leave the name undefined, WebLogic Server monitors all instances of the MBean type that you specify in Monitored MBean Type.

Do not enter the full JMX object name of the MBean instance. Instead, enter only the value that you provided when you created the instance. To create unique MBean object names, WebLogic Server encodes several name-value pairs into each object name. One of these pairs is `Name=name`, and this is the value that you enter for MBean Name. For example:
`"MedRec:Name=MedRecServer,
Type=ServerRuntime"`

In the previous example, specify `MedRecServer` as the name of the MBean instance.

Privileges | Read/Write
Type | java.lang.String

### AttributeMBeanType

The MBean type that defines the attribute you want to monitor. Do not include the `MBean` suffix. For example, `Server`.

WebLogic Server does not support using Attribute Change trap notifications to monitor run-time attributes. Runtime MBeans always include the word `Runtime` in their names. For example, the `ServerRuntime` MBean provides access to runtime attributes while the `Server` MBean provides access to configuration attributes. To monitor changes in an MBean that includes `Runtime` in its name, use a String Monitor, Gauge Monitor, or Counter Monitor.

Privileges | Read/Write
Type | java.lang.String

### AttributeName

The name of the attribute that you want to monitor. This attribute must be in the WebLogic Server MIB.

Privileges | Read/Write
Type | java.lang.String

### Name

The user-specified name of this MBean instance.

This name is included as one of the key properties in the MBean's `javax.management.ObjectName`:
`Name=user-specified-name`

Privileges | Read/Write
Type | java.lang.String

### Notes

Optional information that you can include to describe this configuration.

WebLogic Sever saves this note in the domain's configuration file (`config.xml`) as XML PCDATA. All left angle brackets (<) are converted to the XML entity `&lt;`. Carriage returns/line feeds are preserved.

Note:

  If you create or edit a note from the Administration Console, the Administration Console does not preserve carriage returns/line feeds.

Privileges | Read/Write
Type | java.lang.String

### Parent

Return the immediate parent for this MBean

Privileges | Read/Write
Type |

### Type

Returns the type of the MBean.

Privileges | Read only
Type | java.lang.String
Redeploy or Restart required | Changes take effect after you redeploy the module or restart the server.

## Operations

This section describes the following operations:

addEnabledServer freezeCurrentValue isSet removeEnabledServer | restoreDefaultValue unSet

### addEnabledServer

Adds a feature to the EnabledServer attribute of the SNMPTrapSourceMBean object

Operation Name | `"addEnabledServer"`
Parameters | `Object [] { server }` where: `server` is an object of type `weblogic.management.configuration.ServerMBean` that specifies: The feature to be added to the EnabledServer attribute
Signature | `String [] { "weblogic.management.configuration.ServerMBean" }`
Returns | `boolean`
Exceptions | `javax.management.InvalidAttributeValueException` `weblogic.management.configuration.ConfigurationException`

### freezeCurrentValue

If the specified attribute has not been set explicitly, and if the attribute has a default value, this operation forces the MBean to persist the default value.

Unless you use this operation, the default value is not saved and is subject to change if you update to a newer release of WebLogic Server. Invoking this operation isolates this MBean from the effects of such changes.

Note:

  To insure that you are freezing the default value, invoke the `restoreDefaultValue` operation before you invoke this.

This operation has no effect if you invoke it on an attribute that does not provide a default value or on an attribute for which some other value has been set.

Deprecated. 9.0.0.0

Operation Name | `"freezeCurrentValue"`
Parameters | `Object [] { attributeName }` where: `attributeName` is an object of type `java.lang.String` that specifies: attributeName
Signature | `String [] { "java.lang.String" }`
Returns | `void`
Exceptions | `javax.management.AttributeNotFoundException` `javax.management.MBeanException`

### isSet

Returns true if the specified attribute has been set explicitly in this MBean instance.

Operation Name | `"isSet"`
Parameters | `Object [] { propertyName }` where: `propertyName` is an object of type `java.lang.String` that specifies: property to check
Signature | `String [] { "java.lang.String" }`
Returns | `boolean`

### removeEnabledServer

Operation Name | `"removeEnabledServer"`
Parameters | `Object [] { server }` where: `server` is an object of type `weblogic.management.configuration.ServerMBean` that specifies: server
Signature | `String [] { "weblogic.management.configuration.ServerMBean" }`
Returns | `boolean`
Exceptions | `javax.management.InvalidAttributeValueException` `weblogic.management.configuration.ConfigurationException`

### restoreDefaultValue

If the specified attribute has a default value, this operation removes any value that has been set explicitly and causes the attribute to use the default value.

Default values are subject to change if you update to a newer release of WebLogic Server. To prevent the value from changing if you update to a newer release, invoke the `freezeCurrentValue` operation.

This operation has no effect if you invoke it on an attribute that does not provide a default value or on an attribute that is already using the default.

Deprecated. 9.0.0.0

Operation Name | `"restoreDefaultValue"`
Parameters | `Object [] { attributeName }` where: `attributeName` is an object of type `java.lang.String` that specifies: attributeName
Signature | `String [] { "java.lang.String" }`
Returns | `void`
Exceptions | `javax.management.AttributeNotFoundException`

### unSet

Restore the given property to its default value.

Operation Name | `"unSet"`
Parameters | `Object [] { propertyName }` where: `propertyName` is an object of type `java.lang.String` that specifies: property to restore
Signature | `String [] { "java.lang.String" }`
Returns | `void`