What is a NamespaceHandler? What is the need to write our custom NamespaceHandler?
Please explain me the significance of NamespaceHandler. Provide me Any links on internet.
It handles specific XML tags found inside a file, such as <log:return />, which is the return tag inside the log namespace.
The best reference is often the Javadoc.
It is useful if you want to use your custom XML tags in an XML configuration:
http://www.theserverside.com/news/1364131/Authoring-Custom-Namespaces-in-Spring-20
If you have a framework and want to add Spring integration to your framework, it could be useful. In that case it would be more important to define the equivalent annotations.
Related
I a few existing freemarker templates (ftl) in Spring MVC project. They are using standard spring tags (#spring.url, #spring.message and #spring.bind). While using standard approach of using FreemarkerConfig inside the servlet context (with ViewResolver) all of the templates work fine.
I also have some email templates which is programatically being created, but they are not using any spring tags or additional tlds.
The twist is, I have a task to use the regular template and process them using Freemarker Template class from a Service Bean. The service class have the find the template in the specified location ("/WEB-INF/views"), but it does not process the spring tags, and finds "spring" variable to null. I have set "auto_import" to "/spring.ftl as spring", but my understanding is it will only work within Web/servlet context? Am I using the right approach here? What is the best way to process a "Template" outside and how to expose the spring.tld or anyother.ltd for it? Appreciate your help / pointers!
I am new to spring and happy to see that following works as expected:
<bean id="..." class="server.Shell">
<property name="usableCommands" value="cat"/>
</bean>
The above is in the client code, where I have provided the server.Shell. Now I would like for the clients to be able to use the following:
<shell id="...">
<usableCommands value="cat"/>
</shell>
Is there anything in springframework that I can use to map say an xsd to bean classes? Any other suggestion for easily creating a simple xml based domain language?
You can register a custom XML Namespace in Spring that would allow you to customize your configuration XML. If you're looking to create a sort of DSL in your Spring configuration XML, that might be a good place to start.
UPDATE:
Check out this link for a general example of how custom namespaces in Spring work. This pattern should hold in OSGi as well -- check out Section 6.4 of the Spring OSGi docs for an explanation. If you're new to OSGi, it can be daunting in general. SpringDM can help. Try here for some background and here for an example. Hope that helps.
Looking for a solution that will provide us more functionality within Spring properties such as:
nested structures
maps/lists
properties referencing other properties. Example:
city.name=Toronto
city.address=#{city.name}, 123 Ave SW
I tried EProperties (Google) and Commons Configurations (Apache) but doesn't seem to integrate very well with the Spring Framework.
Also, we're using Velocity to access properties using #springMessage("city.address"), so it needs to work for that.
Does anyone know how I can achieve the above by extending the default Properties capability?
With newest versions of Spring you can use the PropertySource mechanism. You register all your PropertySource and the order in which they are searched and then you don't have to do anything, except perhaps add this to your XML:
<context:property-placeholder />
As long as you declare only one of these without specifying local property files (the "old way"), you will be able to reference property A as the value of property B, even if they are not in the same property source.
For nested structures this may help if you don't like the properties readability:
https://stackoverflow.com/a/13470704/82609
For parsing problems you can easily handle lists and other stuff like that manually very easily:
Reading a List from properties file and load with spring annotation #Value
I'm creating a custom taglib, and would like to use some config options that are loaded via the underlying Spring framework using:
<context:property-placeholder location="classpath:config.properties" />
How would I get access to these variables in my taglib?
Thanks,
James.
The JSP taglibs have nothing in common with the Spring context's lifecycle, they're managed by the servlet container. This can complicate things a bit, for example: inject-dependency-into-a-taglib-class, how-to-write-tag-in-my-spring-project.
Since you're only mentioning the need for contents of the properties file, you could use plain old java.util.ResourceBundle (or, if you need more flexibility, Apache Commons' org.apache.commons.configuration.PropertiesConfiguration).
(One could also argue that requiring access to configuration in your tags indicates a design problem...)
Is it possible to inject Spring beans directly into ZK backing beans?
In tutorials such as this I've found only an example, where application context was extracted manually from web application complex, which very unelegant and unflexible.
In fact, the VariableResolver is working, it is however hard to find, how to use it properly.
First, I had to include header in .zul file:
<?variable-resolver class="org.zkoss.zkplus.spring.DelegatingVariableResolver"?>
Then, use ${controllerBeanName} in apply attribute, f.e.
<window id="win" title="Typy mieszkań" width="750px" border="normal"
apply="${appartmentTypeController}">
In my case, appartmentTypeController is bean extending GeneralForwardComposer, defined in spring context.
did you try the Variable-Resolver ?? i found an article about it
http://books.zkoss.org/wiki/Small_Talks/2010/December/Integrate_ZK_Spreadsheet2.0.0_with_Spring
May ZK-DL http://zk.datalite.cz/zk-dl library help you? It takes it's own approach to Spring integration, not the original ZK way.