org.directwebremoting.extend
Class CallbackHelper

java.lang.Object
  org.directwebremoting.extend.CallbackHelper

public class CallbackHelper
extends java.lang.Object

A class to help with the use of Callbacks

Author:

Joe Walker [joe at getahead dot ltd dot uk]

Field Summary

static java.lang.String	KEY_CALLBACK The key that we use in a script session to store Callbacks
static java.lang.String	KEY_TYPE The key that we use in a script session to store Callbacks

Constructor Summary

CallbackHelper()

Method Summary

static java.lang.String	createUniqueId() Callbacks need a unique ID
static <T> void	executeCallback(java.lang.String key, RawData data) The reverse of saveCallback(Callback, Class) which executes a Callback which has been
static <T> java.lang.String	saveCallback(Callback<T> callback, java.lang.Class<T> type) Used by the many proxy classes to record a callback for later calling

Methods inherited from class java.lang.Object

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

Field Detail

KEY_CALLBACK

public static final java.lang.String KEY_CALLBACK

The key that we use in a script session to store Callbacks

See Also:

Constant Field Values

KEY_TYPE

public static final java.lang.String KEY_TYPE

The key that we use in a script session to store Callbacks

See Also:

Constant Field Values

Constructor Detail

CallbackHelper

public CallbackHelper()

Method Detail

saveCallback

public static <T> java.lang.String saveCallback(Callback<T> callback,
                                                java.lang.Class<T> type)

Used by the many proxy classes to record a callback for later calling

Parameters:

callback - The callback that acts on the type

type - The type of the data that we are recording

Returns:

A key under which the data is stored

executeCallback

public static <T> void executeCallback(java.lang.String key,
                                       RawData data)
                            throws MarshallException

The reverse of saveCallback(Callback, Class) which executes a Callback which has been

Parameters:

key -

data -

Throws:

MarshallException

createUniqueId

public static java.lang.String createUniqueId()

Callbacks need a unique ID