Normal
0
false
false
false
EN-US
X-NONE
X-NONE
/* Style Definitions */
table.MsoNormalTable
{mso-style-name:"Table Normal";
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
mso-style-noshow:yes;
mso-style-priority:99;
mso-style-qformat:yes;
mso-style-parent:"";
mso-padding-alt:0in 5.4pt 0in 5.4pt;
mso-para-margin:0in;
mso-para-margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
mso-ascii-font-family:Calibri;
mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:"Times New Roman";
mso-fareast-theme-font:minor-fareast;
mso-hansi-font-family:Calibri;
mso-hansi-theme-font:minor-latin;
mso-bidi-font-family:"Times New Roman";
mso-bidi-theme-font:minor-bidi;}
The af:serverListener
tag in Oracle ADF Faces allows JavaScript to call into server
side Java.
The
example shown below uses an af:clientListener
tag to invoke
client side JavaScript in response to a key stroke in an Input
Text field.
The script then call a defined af:serverListener by its name defined in
the type attribute.
The server listener can
be defined anywhere on
the page, though from a code readability perspective it
sounds like a good idea to put it close to from where it is invoked.
<af:inputText
id="it1" label="...">
<af:clientListener method="handleKeyUp"
type="keyUp"/>
<af:serverListener type="MyCustomServerEvent"
method="#{mybean.handleServerEvent}"/>
</af:inputText>
The JavaScript function below reads
the event source from
the event object that gets passed into
the called JavaScript function.
The call
to
the server
side Java method, which is defined on a managed bean, is issued
by a JavaScript call to AdfCustomEvent.
The arguments passed to
the custom event are
the event source,
the name of
the
server listener, a message payload formatted as an array of key:value pairs,
and true/false indicating whether or not to make
the call immediate in
the
request lifecycle.
<af:resource
type="javascript">
function handleKeyUp (evt) {
var inputTextComponen =
event.getSource();
AdfCustomEvent.queue(inputTextComponent,
"MyCustomServerEvent ",
{fvalue:component.getSubmittedValue()},
false);
event.cancel();}
</af:resource>
The server
side managed bean method uses a single argument
signature with
the argument type being ClientEvent.
The client event provides information about
the event source object - as provided
in
the call to AdfCustomEvent,
as well as
the payload keys and values.
The payload is accessible from a call
to getParameters,
which returns a HashMap to get
the values by its key identifiers.
public void handleServerEvent(ClientEvent ce){
String message = (String) ce.getParameters().get("fvalue");
...
}
Normal
0
false
false
false
EN-US
X-NONE
X-NONE
/* Style Definitions */
table.MsoNormalTable
{mso-style-name:"Table Normal";
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
mso-style-noshow:yes;
mso-style-priority:99;
mso-style-qformat:yes;
mso-style-parent:"";
mso-padding-alt:0in 5.4pt 0in 5.4pt;
mso-para-margin:0in;
mso-para-margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
mso-ascii-font-family:Calibri;
mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:"Times New Roman";
mso-fareast-theme-font:minor-fareast;
mso-hansi-font-family:Calibri;
mso-hansi-theme-font:minor-latin;
mso-bidi-font-family:"Times New Roman";
mso-bidi-theme-font:minor-bidi;}
Find
the tag library at: http://download.oracle.com/docs/cd/E15523_01/apirefs.1111/e12419/tagdoc/af_serverListener.html
