ajanta.server
Class DD

java.lang.Object
  |
  +--ajanta.server.DD

public class DD

extends java.lang.Object

The server maintains a domain registry indexed by thread group ids, in which it stores the agent's URN and credentials, as well as a reference to the agent object itself. This entry is used by the server's security-conscious code whenever it needs access to the agent or its identity --- for example, when an agent attempts to acquire a resource, its credentials may be needed to determine the level of access permitted. The resource's code finds the current thread's thread group id and looks up the domain registry using that id as the index. The registry entry can then be used to determine the agent's access privileges.

Constructor Summary

DD(ajanta.naming.URN name, ajanta.agent.Agent ag, java.lang.ThreadGroup tg, ajanta.server.AgentLoader cl, ajanta.server.AgentEnv h, java.io.ObjectInputStream in, java.io.ObjectOutputStream out, ajanta.util.MethodSpec action, ajanta.agent.Credentials cred, int nonce, ajanta.naming.URN credSignedBY)

Method Summary

ajanta.util.MethodSpec	getAction() return MeyhodSpec of the method to be executed on this server
ajanta.agent.Agent	getAgent() return reference of the agent
ajanta.server.AgentEnv	getAgentEnv() return agent server enevironment context available to this agent
ajanta.agent.Credentials	getCredentials() return credential object of the agent
java.security.Signature	getCredSignature() return credntial signature object of the DD
java.io.ObjectInputStream	getIS() return ObjectInputStream on which agent is transfered
ajanta.server.AgentLoader	getLoader() return agent loader for the agent
ajanta.naming.URN	getName() return URN of the agent
int	getNonce() return current challenge ( nonce ) for the agent
java.io.ObjectOutputStream	getOS() return ObjectOutputStream on which server can send reply or ack to sender
ajanta.naming.URN	getSignedBY() return URN of the signer of the signature
java.lang.ThreadGroup	getTG() return thread group id of the agent
boolean	getVerified()
void	setAgent(ajanta.agent.Agent x) Set agent field of the DD to the agent reference passed as argument
void	setCredentials(ajanta.agent.Credentials c) Set credntial object of the DD to the credential object passed as argument
void	setCredSignature(java.security.Signature s) Set credntial signature object of the DD to the signature object passed as argument
void	setTransferMode() These public methods are called by the launch() method in the AgentEnv to set or unset the boolean when it is in the process of launching an agent so that the security manager will know when to allow the connection
void	setVerified(boolean stat) set verified filed to stat value passed as argument.
void	unsetTransferMode()

Methods inherited from class java.lang.Object

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

Constructor Detail

DD

public DD(ajanta.naming.URN name,
          ajanta.agent.Agent ag,
          java.lang.ThreadGroup tg,
          ajanta.server.AgentLoader cl,
          ajanta.server.AgentEnv h,
          java.io.ObjectInputStream in,
          java.io.ObjectOutputStream out,
          ajanta.util.MethodSpec action,
          ajanta.agent.Credentials cred,
          int nonce,
          ajanta.naming.URN credSignedBY)

Parameters:

name - the agent's URN

ag - the agent object

tg - the thread group created for this agent

cl - the class loader assigned to this agent

h - agent server environment context object

in - the stream on which the agent is transferred

out - the corresponding output stream to send acknowledgement

action - the agent's action to be executed at this site

cred - agent's credentials

nonce - challenge sent in the ATPReply to sending server

credSignedBY - URN of the signer of the credential bytes

Method Detail

getAgent

public ajanta.agent.Agent getAgent()

return reference of the agent

getName

public ajanta.naming.URN getName()

return URN of the agent

getTG

public java.lang.ThreadGroup getTG()

return thread group id of the agent

getIS

public java.io.ObjectInputStream getIS()

return ObjectInputStream on which agent is transfered

getOS

public java.io.ObjectOutputStream getOS()

return ObjectOutputStream on which server can send reply or ack to sender

getLoader

public ajanta.server.AgentLoader getLoader()

return agent loader for the agent

getCredentials

public ajanta.agent.Credentials getCredentials()

return credential object of the agent

getAction

public ajanta.util.MethodSpec getAction()

return MeyhodSpec of the method to be executed on this server

getAgentEnv

public ajanta.server.AgentEnv getAgentEnv()

return agent server enevironment context available to this agent

getNonce

public int getNonce()

return current challenge ( nonce ) for the agent

setAgent

public void setAgent(ajanta.agent.Agent x)

Set agent field of the DD to the agent reference passed as argument

setCredentials

public void setCredentials(ajanta.agent.Credentials c)

Set credntial object of the DD to the credential object passed as argument

setCredSignature

public void setCredSignature(java.security.Signature s)

Set credntial signature object of the DD to the signature object passed as argument

getCredSignature

public java.security.Signature getCredSignature()

return credntial signature object of the DD

setVerified

public void setVerified(boolean stat)

set verified filed to stat value passed as argument. True indicate signature is verfied

getVerified

public boolean getVerified()

Returns:

true if signature is verified false otherwise

getSignedBY

public ajanta.naming.URN getSignedBY()

return URN of the signer of the signature

setTransferMode

public void setTransferMode()

These public methods are called by the launch() method in the AgentEnv to set or unset the boolean when it is in the process of launching an agent so that the security manager will know when to allow the connection

unsetTransferMode

public void unsetTransferMode()