org.hebe.mps
Class NamingServiceImpl

org.hebe.mps.NamingServiceImpl

public class NamingServiceImpl

Implementation class for the MPS Server Interface defined in ../namingservice.mps. MPS uses an MPS server to locate its own server names!

Note that this class has a main method - it is its own application as well: a standalone MPS name server.

Author:

Tony Garnock-Jones

Field Summary

private java.util.Hashtable

names This class uses a naive hashtable-lookup to map objectNames onto resolvedNames (aka canonical names).

Constructor Summary

NamingServiceImpl()

Method Summary

boolean	bind(java.lang.String name, java.lang.String cname, boolean replace) Implement the naming-service name binding function.
org.hebe.mps.naming.Binding[]	enumerate() Get a list of all the name-value pairs in the current running database.
static void	main(java.lang.String[] args) Main method for the standalone naming server.
java.lang.String	resolve(java.lang.String name) Implement the naming-service resolution function.
boolean	unbind(java.lang.String name) Implement the naming-service name unbinding function.
static void	usage() Display a friendly application-usage message to stdout.

Field Detail

names

private java.util.Hashtable names

This class uses a naive hashtable-lookup to map objectNames onto resolvedNames (aka canonical names).

Constructor Detail

NamingServiceImpl

public NamingServiceImpl()

Method Detail

main

public static void main(java.lang.String[] args)

Main method for the standalone naming server.

usage

public static void usage()

Display a friendly application-usage message to stdout.

resolve

public java.lang.String resolve(java.lang.String name)

Implement the naming-service resolution function.

Parameters:

name - the objectName to look up

Returns:

the results of the lookup - an address, or the empty-string

bind

public boolean bind(java.lang.String name,
                    java.lang.String cname,
                    boolean replace)

Implement the naming-service name binding function.

Parameters:

name - the object name to use

cname - the canonical name to use

replace - whether to replace any potential existing bindings with the same name or not

Returns:

true if the bind succeeded; false if an existing binding was not replaced

unbind

public boolean unbind(java.lang.String name)

Implement the naming-service name unbinding function.

Parameters:

name - the name to remove from this nameserver

Returns:

true if the name was removed; false if it was not bound in the first place

enumerate

public org.hebe.mps.naming.Binding[] enumerate()

Get a list of all the name-value pairs in the current running database.

Returns:

an array of Result structures containing every map in the hashtable