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Java Platform 1.2
Beta 4

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Class java.rmi.dgc.VMID

java.lang.Object
  |
  +--java.rmi.dgc.VMID

public final class VMID

extends Object

implements Serializable

A VMID is a identifier that is unique across all Java virtual machines. VMIDs are used by the distributed garbage collector to identify client VMs.

See Also:

Serialized Form

Constructor Summary

VMID()
Create a new VMID. Each new VMID returned from this constructor is unique for all Java virtual machines under the following conditions: a) the conditions for uniqueness for objects of the class java.rmi.server.

Method Summary

boolean	equals(Object obj) Compare this VMID to another, and return true if they are the same identifier.
int	hashCode() Compute hash code for this VMID.
static boolean	isUnique() Return true if an accurate address can be determined for this host.
String	toString() Return string representation of this VMID.

Methods inherited from class java.lang.Object

clone , finalize , getClass , notify , notifyAll , wait , wait , wait

Constructor Detail

VMID

public VMID()

Create a new VMID. Each new VMID returned from this constructor is unique for all Java virtual machines under the following conditions: a) the conditions for uniqueness for objects of the class java.rmi.server.UID are satisfied, and b) an address can be obtained for this host that is unique and constant for the lifetime of this object.

The static method isUnique can be invoked to determine if an accurate address can be obtained for this host.

Method Detail

isUnique

public static boolean isUnique()

Return true if an accurate address can be determined for this host. If false, reliable VMID cannot be generated from this host

Returns:

true if host address can be determined, false otherwise

hashCode

public int hashCode()

Compute hash code for this VMID.

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Compare this VMID to another, and return true if they are the same identifier.

Overrides:

equals in class Object

toString

public String toString()

Return string representation of this VMID.

Overrides:

toString in class Object