# COMMBean

Overview | Related MBeans | Attributes | Operations

## Overview

This bean represents the server-wide configuration of COM

Since | 7.0.0.0
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.COMMBean`
Factory Methods | No factory methods. Instances of this MBean are created automatically.
Access Points | You can access this MBean from the following MBean attributes:
ServerMBean.COM |

## Attributes

This section describes the following attributes:

ApartmentThreaded MemoryLoggingEnabled Name NativeModeEnabled Notes NTAuthHost | Parent PrefetchEnums Type VerboseLoggingEnabled

### ApartmentThreaded

Controls the flag that is used to initialize COM in native mode.

By default, when jCOM initializes COM in native mode, it starts COM with the `COINIT_MULTITHREADED`. This causes COM to use Multi-Threaded Apartment (MTA) thread model. In the MTA model, calls to an object are not synchronized by COM. Multiple clients can concurrently call an object that supports this model on different threads, and the object must provide synchronization in its interface/method implementations using synchronization objects such as events, mutexes, semaphores, etc. MTA objects can receive concurrent calls from multiple out-of-process clients through a pool of COM-created threads belonging to the object's process.

If the server logs a Class Not Registered Message when starting COM in native mode, try setting this property. This will cause jCOM to start COM in native mode, using `COINIT_APARTMENTTHREADED` option instead of the `COINIT_MULTITHREADED` option. In a component that is marked as Apartment Threaded, each method of that component will execute on a thread that is associated with that component. This separates the methods into their own "Apartments", with each instance of a component corresponding to one apartment. While there is only one thread inside of a component, each instance of that component will have its own thread apartment.

Privileges | Read/Write
Type | boolean

### MemoryLoggingEnabled

Specifies whether this server should log memory usage.

Privileges | Read/Write
Type | boolean

### 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

### NativeModeEnabled

Specifies whether this server should use native DLLs to allow Java objects to interact with COM objects. (Supported on Windows only.)

Privileges | Read/Write
Type | boolean

### 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

### NTAuthHost

The address of the primary domain controller this server uses for authenticating clients. (If not specified, COM clients will not be authenticated.)

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

### Parent

Return the immediate parent for this MBean

Privileges | Read/Write
Type |

### PrefetchEnums

Specifies whether this server should prefetch the next element in a `java.lang.Enumeration` (that had been improperly converted from a COM `VariantEnumeration` type) so the correct value is returned when the `hasMoreElements()` method is called.

Some COM methods return a COM VariantEnumeration type. The java2com tool automatically converts the returned type into a java.lang.Enumeration. This is not a perfect match since COM enumerations have no equivalent to the `hasMoreElements()` call. The client must continue to call `nextElement` until a `NoSuchElementException` occurs. Setting this property will cause jCOM to prefetch the next element in behind the scenes and return the correct value when hasMoreElements is called.

Privileges | Read/Write
Type | boolean

### 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.

### VerboseLoggingEnabled

Specifies whether verbose logging is enabled.

Privileges | Read/Write
Type | boolean

## Operations

This section describes the following operations:

freezeCurrentValue isSet restoreDefaultValue | unSet

### 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`

### 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`