This is a followup to my earlier email about best practices for
annotations. As of the latest snapshot, RIFE now has support for a
couple of new annotations that have made me move the last of my
configuration out of the XML files. Now my XML config is mostly just a
list of <element> tags with URLs and implementation class names.
("Mostly" because I am still configuring built-in RIFE elements in the
XML, e.g. the authentication element.)
Now I can define my site structure without repeating information in my
code. Here's what it looks like with the new annotations:
@Elem(
url = "" // An embedded element
)
public class ProductListEntry extends AbstractProductProvider {
@FlowlinkExitField(destClass = EditProduct.class,
destClassIdPrefix = ".Admin.",
datalinks = {
@Datalink(srcOutput="productId", destInput="productId")
})
public static final String EXIT_EDIT_PRODUCT = "editProduct";
@FlowlinkExitField(destClass = ShowProduct.class,
datalinks = {
@Datalink(srcOutput="productId", destInput="productId")
})
public static final String EXIT_SHOW_PRODUCT = "showProduct";
@OutputProperty
public int getProductId() {
if (_product != null)
return _product.getId();
return 0;
}
public void processElement() {
...
exit(EXIT_SHOW_PRODUCT);
}
Notice that I don't explicitly declare any exits -- the
@FlowlinkExitField annotation does that implicitly. And thanks to the
destClassIdPrefix attribute (which is also present on the @Exit
annotation) I can now refer to a destination class rather than an ID
even if the element is in another subsite. I also define my datalinks in
the context of my flowlinks, which I hadn't noticed I could do when I
sent my previous mail. I think that makes it a lot easier to follow.
The only place where I'm still repeating myself here is that I have the
exit names in my templates (in the form of ${v EXIT:QUERY:showProduct/}
etc.) I'm not doing this, but it's possible to get rid of those too if
you want to be very strict about not duplicating exit names:
template.setValue("showProductUrl",
getExitQueryUrl(EXIT_SHOW_PRODUCT));
<a href="${v showProductUrl/}">...</a>
That will automatically fetch any required output values and add them to
the URL. I don't do that because it doesn't reduce the number of times I
have to repeat myself -- I still have to have the template value name in
both places anyway. But if you do it that way then your actual exit
names would become totally irrelevant, if that's a plus for you.
Anyone else doing something different they want to share?
-Steve
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