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This commit is contained in:
Keith Donald
2008-11-10 23:14:20 +00:00
parent a3d78151a0
commit 128c7411c1
3 changed files with 61 additions and 18 deletions
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37
spring-webflow-reference/src/actions.xml
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@@ -186,23 +186,50 @@ public class CustomMultiAction extends MultiAction {
The result is treated as a flow event which the calling flow can then respond to.
</para>
<programlisting language="xml"><![CDATA[
<evaluate expression="bookingAction.makeBooking(booking, messageContext)" />]]>
<evaluate expression="bookingAction.makeBooking(booking, flowRequestContext)" />]]>
</programlisting>
<programlisting language="java"><![CDATA[
public class BookingAction {
public String makeBooking(Booking booking, MessageContext context) {
public String makeBooking(Booking booking, RequestContext context) {
try {
bookingService.make(booking);
BookingConfirmation confirmation = bookingService.make(booking);
context.getFlowScope().put("confirmation", confirmation);
return "success";
} catch (RoomNotAvailableException e) {
context.addMessage(builder.error().
context.addMessage(new MessageBuilder().error().
.defaultText("No room is available at this hotel").build());
return "error";
}
}
}]]>
</programlisting>
</sect2>
</sect2>
<sect2>
<title>Handling a business exception with a MultiAction</title>
<para>
The following example is functionally equivlant to the last, but implemented as a MultiAction instead of a POJO action.
The MultiAction requires its action methods to be of the signature <code>Event ${methodName}(RequestContext)</code>, providing stronger type safety, while a POJO action allows for more freedom.
</para>
<programlisting language="xml"><![CDATA[
<evaluate expression="bookingAction.makeBooking" />]]>
</programlisting>
<programlisting language="java"><![CDATA[
public class BookingAction extends MultiAction {
public Event makeBooking(RequestContext context) {
try {
Booking booking = (Booking) context.getFlowScope().get("booking");
BookingConfirmation confirmation = bookingService.make(booking);
context.getFlowScope().put("confirmation", confirmation);
return success();
} catch (RoomNotAvailableException e) {
context.getMessageContext().addMessage(new MessageBuilder().error().
.defaultText("No room is available at this hotel").build());
return error();
}
}
}]]>
</programlisting>
</sect2>
</sect1>
<sect1 id="action-examples">
<title>Other Action execution examples</title>