wt.feedback
Class WTContextUpdate

java.lang.Object
  wt.feedback.WTContextUpdate

All Implemented Interfaces:

Externalizable, MethodFeedback, Serializable

public class WTContextUpdate

extends Object

implements MethodFeedback, Externalizable

Feedback object to carry updates to client's WTContext object. This class can be used by server-side methods to push updates to a client's WTContext as a side effect of performing an operation.

For example, if some client-side classes use the WTContext object to cache frequently used objects, server-side operations that change these objects can automatically push new values into the client's WTContext object. This is useful if the currently executing method does not normally carry such updated objects as part of its return value.

Supported API: true
Extendable: true

See Also:

Serialized Form

Field Summary

private Object	key
(package private) static long	serialVersionUID
private Object	value
private static String	versionID

Constructor Summary

WTContextUpdate()
Public no-arg constructor required by Externalizable.

WTContextUpdate(Object key, Object value)
Construct a new WTContextUpdate object.

Method Summary

void	execute() Perform feedback operation in client.
void	readExternal(ObjectInput input_stream) Called during marshaling on the client side.
void	writeExternal(ObjectOutput output_stream) Called during marshaling on the server side.

Methods inherited from class java.lang.Object

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

Field Detail

versionID

private static final String versionID

See Also:

Constant Field Values

serialVersionUID

static final long serialVersionUID

See Also:

Constant Field Values

key

private Object key

value

private Object value

Constructor Detail

WTContextUpdate

public WTContextUpdate()

Public no-arg constructor required by Externalizable. This constructor is only used on the client-side when receiving the object.

Supported API: true

WTContextUpdate

public WTContextUpdate(Object key,
                       Object value)

Construct a new WTContextUpdate object.

Supported API: true

Parameters:

key - the hashtable key

value - the value

Method Detail

execute

public void execute()

Perform feedback operation in client. This method is automatically invoked when the feedback is received in the client's RMI reply marshalling stream. It has the effect of putting this objects key and value into the current thread's WTContext object.

Supported API: true

Specified by:

execute in interface MethodFeedback

readExternal

public void readExternal(ObjectInput input_stream)
                  throws IOException,
                         ClassNotFoundException

Called during marshaling on the client side.

Supported API: true

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException

writeExternal

public void writeExternal(ObjectOutput output_stream)
                   throws IOException

Called during marshaling on the server side.

Supported API: true

Specified by:

writeExternal in interface Externalizable

Throws:

IOException