Java Enterprise in a Nutshell, Second Edition

Name

ObjID

Synopsis

An ObjID is used on an object server to uniquely identify exported remote objects. Its primary use in an RMI server is during distributed garbage collection.

The equals() method is overridden from Object to return true only if the objects identified by the two ObjID's are equal. The ObjID class also has read() and write() methods that serve to marshal and unmarshal an ObjID from I/O streams.

                  
public final class ObjID implements Serializable {
// Public Constructors
   public ObjID();  
   public ObjID( int objNum);  
// Public Constants
   public static final int ACTIVATOR_ID;                         // =1, 1.2
   public static final int DGC_ID;                               // =2
   public static final int REGISTRY_ID;                          // =0
                  // Public Class Methods
   public static ObjID read(
        ObjectInput in) throws IOException;  
// Public Instance Methods
   public void write( ObjectOutput out) throws IOException;  
// Public Methods Overriding Object
   public boolean equals( Object obj);  
   public int hashCode();  
   public String toString();  
}

Passed To

java.rmi.dgc.DGC.{clean(), dirty()}

Returned By

ObjID.read()