Class LocateRegistry

java.lang.Object

java.rmi.registry.LocateRegistry

public final class LocateRegistry
extends Object

LocateRegistry is used to obtain a reference to a bootstrap remote object registry on a particular host (including the local host), or to create a remote object registry that accepts calls on a specific port.

Note that a getRegistry call does not actually make a connection to the remote host. It simply creates a local reference to the remote registry and will succeed even if no registry is running on the remote host. Therefore, a subsequent method invocation to a remote registry returned as a result of this method may fail.

Since:

1.1

See Also:

• Registry

Method Summary

Modifier and Type	Method	Description
static Registry	createRegistry(int port)	Creates and exports a Registry instance on the local host that accepts requests on the specified port.
static Registry	createRegistry(int port, RMIClientSocketFactory csf, RMIServerSocketFactory ssf)	Creates and exports a Registry instance on the local host that uses custom socket factories for communication with that instance.
static Registry	getRegistry()	Returns a reference to the remote object Registry for the local host on the default registry port of 1099.
static Registry	getRegistry(int port)	Returns a reference to the remote object Registry for the local host on the specified port.
static Registry	getRegistry(String host)	Returns a reference to the remote object Registry on the specified host on the default registry port of 1099.
static Registry	getRegistry(String host, int port)	Returns a reference to the remote object Registry on the specified host and port.
static Registry	getRegistry(String host, int port, RMIClientSocketFactory csf)	Returns a locally created remote reference to the remote object Registry on the specified host and port.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Modifier and Type	Method	Description
protected Object	clone()	Creates and returns a copy of this object.
boolean	equals(Object obj)	Indicates whether some other object is "equal to" this one.
protected void	finalize()	Deprecated, for removal: This API element is subject to removal in a future version. Finalization is deprecated and subject to removal in a future release.
final Class<?>	getClass()	Returns the runtime class of this Object.
int	hashCode()	Returns a hash code value for this object.
final void	notify()	Wakes up a single thread that is waiting on this object's monitor.
final void	notifyAll()	Wakes up all threads that are waiting on this object's monitor.
String	toString()	Returns a string representation of the object.
final void	wait()	Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
final void	wait(long timeoutMillis)	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
final void	wait(long timeoutMillis, int nanos)	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

Method Details

getRegistry

public static Registry getRegistry()
                            throws RemoteException

Returns a reference to the remote object Registry for the local host on the default registry port of 1099.

Returns:

reference (a stub) to the remote object registry

Throws:

RemoteException - if the reference could not be created

Since:

1.1

getRegistry

public static Registry getRegistry(int port)
                            throws RemoteException

Returns a reference to the remote object Registry for the local host on the specified port.

Parameters:

port - port on which the registry accepts requests

Returns:

reference (a stub) to the remote object registry

Throws:

RemoteException - if the reference could not be created

Since:

1.1

getRegistry

public static Registry getRegistry(String host)
                            throws RemoteException

Returns a reference to the remote object Registry on the specified host on the default registry port of 1099. If host is null, the local host is used.

Parameters:

host - host for the remote registry

Returns:

reference (a stub) to the remote object registry

Throws:

RemoteException - if the reference could not be created

Since:

1.1

getRegistry

public static Registry getRegistry(String host,
 int port)
                            throws RemoteException

Returns a reference to the remote object Registry on the specified host and port. If host is null, the local host is used.

Parameters:

host - host for the remote registry

port - port on which the registry accepts requests

Returns:

reference (a stub) to the remote object registry

Throws:

RemoteException - if the reference could not be created

Since:

1.1

getRegistry

public static Registry getRegistry(String host,
 int port,
 RMIClientSocketFactory csf)
                            throws RemoteException

Returns a locally created remote reference to the remote object Registry on the specified host and port. Communication with this remote registry will use the supplied RMIClientSocketFactory csf to create Socket connections to the registry on the remote host and port.

Parameters:

host - host for the remote registry

port - port on which the registry accepts requests

csf - client-side Socket factory used to make connections to the registry. If csf is null, then the default client-side Socket factory will be used in the registry stub.

Returns:

reference (a stub) to the remote registry

Throws:

RemoteException - if the reference could not be created

Since:

1.2

createRegistry

public static Registry createRegistry(int port)
                               throws RemoteException

Creates and exports a Registry instance on the local host that accepts requests on the specified port.

The Registry instance is exported as if the static UnicastRemoteObject.exportObject method is invoked, passing the Registry instance and the specified port as arguments, except that the Registry instance is exported with a well-known object identifier, an ObjID instance constructed with the value ObjID.REGISTRY_ID.

Parameters:

port - the port on which the registry accepts requests

Returns:

the registry

Throws:

RemoteException - if the registry could not be exported

Since:

1.1

createRegistry

public static Registry createRegistry(int port,
 RMIClientSocketFactory csf,
 RMIServerSocketFactory ssf)
                               throws RemoteException

Creates and exports a Registry instance on the local host that uses custom socket factories for communication with that instance. The registry that is created listens for incoming requests on the given port using a ServerSocket created from the supplied RMIServerSocketFactory.

The Registry instance is exported as if the static UnicastRemoteObject.exportObject method is invoked, passing the Registry instance, the specified port, the specified RMIClientSocketFactory, and the specified RMIServerSocketFactory as arguments, except that the Registry instance is exported with a well-known object identifier, an ObjID instance constructed with the value ObjID.REGISTRY_ID.

Parameters:

port - port on which the registry accepts requests

csf - client-side Socket factory used to make connections to the registry

ssf - server-side ServerSocket factory used to accept connections to the registry

Returns:

the registry

Throws:

RemoteException - if the registry could not be exported

Since:

1.2