orc.runtime.sites
Class Site

java.lang.Object
  orc.runtime.values.Value
      orc.runtime.sites.Site

All Implemented Interfaces:

Callable

Direct Known Subclasses:

Apply, ClassProxy, DotSite, Error, EvalSite, IsNone, IsSome, KilimSite, Let, Ltimer, MethodProxy, None, ObjectProxy, PartialSite, PopLtimer, Print, Println, PushLtimer, Rtimer, Some, ThreadedObjectProxy, ThreadedPartialSite, ThreadedSite, TryCons, TryNil

public abstract class Site
extends Value
implements Callable

Base class for all sites

Author:

wcook, dkitchin

Field Summary

Fields inherited from class orc.runtime.values.Value

futureNotReady

Constructor Summary

Site()

Method Summary

<E> E	accept(Visitor<E> visitor)
abstract void	callSite(Args args, Token caller) Must be implemented by subclasses to implement the site behavior
void	createCall(Token callToken, java.util.List<java.lang.Object> args, Node nextNode) Invoked by a Call to invoke a site.
protected void	enterTransaction(Transaction transaction)
Type	type()

Methods inherited from class orc.runtime.values.Value

forceArg, forceCall, signal, write

Methods inherited from class java.lang.Object

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

Constructor Detail

Site

public Site()

Method Detail

createCall

public void createCall(Token callToken,
                       java.util.List<java.lang.Object> args,
                       Node nextNode)
                throws TokenException

Invoked by a Call to invoke a site. The argument list is scanned to make sure that all parameters are bound. If an unbound parameter is found, the call is placed on a queue and nothing more is done. Once all parameters are bound, their values are collected and the corresponding subclass (the actual site) is called.

Specified by:

createCall in interface Callable

Parameters:

callToken - token for which the call is being made: points to the call node

args - argument list

nextNode - next node after the call node, to which the result should be sent

Throws:

TokenException

See Also:

Callable.createCall(orc.runtime.Token, java.util.List, orc.runtime.nodes.Node)

enterTransaction

protected void enterTransaction(Transaction transaction)
                         throws NontransactionalSiteException

Throws:

NontransactionalSiteException

callSite

public abstract void callSite(Args args,
                              Token caller)
                       throws TokenException

Must be implemented by subclasses to implement the site behavior

Parameters:

args - list of argument values

caller - where the result should be sent

Throws:

TokenException

accept

public <E> E accept(Visitor<E> visitor)

Overrides:

accept in class Value

type

public Type type()
          throws TypeException

Throws:

TypeException