org.objectweb.fractal.rmi
Class RmiAdapter

java.lang.Object
  org.objectweb.fractal.rmi.RmiAdapter

All Implemented Interfaces:

BindingController, NamingContext, Runnable

public class RmiAdapter

extends Object

implements NamingContext, Runnable, BindingController

Provides a very simple object adapter component. This naming context exports an object in the following way:

• if the object has already been exported, the corresponding Identifier is returned directly.
• otherwise a skeleton is created to give access to the interface implemented by the object (the object must implement at least one interface. If it implements more than one, the first one is selected).
• a new identifier is created for this skeleton. This identifer is just an integer value.
• the skeleton is associated to this new identifier in an internal hash table.
• the identifier is returned to the caller.

Field Summary

protected Logger	logger The logger used to log messages.
protected LoggerFactory	loggerFactory The optional logger factory used to get a logger for this component.
protected SkeletonFactory	skeletonFactory The skeleton factory used to create skeletons for the exported objects.

Constructor Summary

RmiAdapter()
Constructs a new RmiAdapter.

Method Summary

void	bindFc(String clientItfName, Object serverItf) Binds the client interface whose name is given to a server interface.
Identifier	decode(byte[] data, int offset, int length) Decodes an identifier from a buffer portion.
Identifier	decode(UnMarshaller u) Decodes an identifier from the provided unmarshaller.
Identifier	export(Object obj, Context hints) Creates a new identifier for the object interface designated by the obj parameter.
String[]	listFc() Returns the names of the client interfaces of the component to which this interface belongs.
Object	lookupFc(String clientItfName) Returns the interface to which the given client interface is bound.
void	run() Blocks the caller thread.
void	unbindFc(String clientItfName) Unbinds the given client interface.

Methods inherited from class java.lang.Object

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

Field Detail

skeletonFactory

protected SkeletonFactory skeletonFactory

The skeleton factory used to create skeletons for the exported objects.

loggerFactory

protected LoggerFactory loggerFactory

The optional logger factory used to get a logger for this component.

logger

protected Logger logger

The logger used to log messages. May be null.

Constructor Detail

RmiAdapter

public RmiAdapter()

Constructs a new RmiAdapter.

Method Detail

listFc

public String[] listFc()

Description copied from interface: BindingController

Returns the names of the client interfaces of the component to which this interface belongs.

Specified by:

listFc in interface BindingController

Returns:

the names of the client interfaces of the component to which this interface belongs.

lookupFc

public Object lookupFc(String clientItfName)

Description copied from interface: BindingController

Returns the interface to which the given client interface is bound. More precisely, returns the server interface to which the client interface whose name is given is bound. This server interface is necessarily in the same address space as the client interface (see bindFc).

Specified by:

lookupFc in interface BindingController

Parameters:

clientItfName - the name of a client interface of the component to which this interface belongs.

Returns:

the server interface to which the given interface is bound, or null if it is not bound.

bindFc

public void bindFc(String clientItfName,
                   Object serverItf)

Description copied from interface: BindingController

Binds the client interface whose name is given to a server interface. More precisely, binds the client interface of the component to which this interface belongs, and whose name is equal to the given name, to the given server interface. The given server interface must be in the same address space as the client interface.

Specified by:

bindFc in interface BindingController

Parameters:

clientItfName - the name of a client interface of the component to which this interface belongs.

serverItf - a server interface.

unbindFc

public void unbindFc(String clientItfName)

Description copied from interface: BindingController

Unbinds the given client interface. More precisely, unbinds the client interface of the component to which this interface belongs, and whose name is equal to the given name.

Specified by:

unbindFc in interface BindingController

Parameters:

clientItfName - the name of a client interface of the component to which this interface belongs.

export

public Identifier export(Object obj,
                         Context hints)
                  throws JonathanException

Creates a new identifier for the object interface designated by the obj parameter. Note that calling the resolve method on the returned identifier should return id.

Specified by:

export in interface NamingContext

Parameters:

obj - an object.

hints - additional information.

Returns:

an identifier managed by the target naming context.

Throws:

JonathanException - if something goes wrong.

decode

public Identifier decode(byte[] data,
                         int offset,
                         int length)
                  throws JonathanException

Decodes an identifier from a buffer portion. Since identifiers are likely to be transmitted on the net, they may have to be encoded and decoded. The encoding method is borne by the Identifier interface, but the decoding methods must be borne by each naming context. This method creates an identifier (associated with the target naming context), from the length bytes of data starting at offset offset.

Specified by:

decode in interface NamingContext

Parameters:

data - the byte array to read the encoded identifier from.

offset - offset of the first byte of the encoding.

length - length of the encoding.

Returns:

a decoded identifier.

Throws:

JonathanException - if something goes wrong.

decode

public Identifier decode(UnMarshaller u)
                  throws JonathanException

Decodes an identifier from the provided unmarshaller.

Specified by:

decode in interface NamingContext

Parameters:

u - an unmarhaller;

Returns:

an identifier managed by the target naming context;

Throws:

JonathanException - if something goes wrong.

run

public void run()

Blocks the caller thread. This method is used to create a "daemon" thread when the export method is called for the time, in order to keep the JVM process alive, waiting for incoming remote method calls.

Specified by:

run in interface Runnable