I am learning spring i know using <replaced-method .....> tag we can replace the old implementation but i don't know how to do that using annotation. Thanks
the configuration of Replace-Method is so long that the reason i can not share here but you can refer bellow link :-
http://www.java2s.com/Code/Java/Spring/MethodReplacementExample.htm
Related
Spring Boot supports Kotlin data classes for #ConfigurationProperties.
#ConstructorBinding
#ConfigurationProperties(prefix = "prefix")
data class AppProperties (
val something: String
)
But val and #ConstructorBinding has some limitations. You cannot alias one variable to another. Let's say you're running in Kubernetes and want to capture the hostname, which is given by the env var HOSTNAME. The easiest way to do this is to apply #Value("\${HOSTNAME}:)" to a property, but it only works for a mutable property and without constructor binding.
The Spring Boot GitHub issue tracker says:
STOP!! Please ask questions about how to use something, or to understand why something isn't
working as you expect it to, on Stack Overflow using the spring-boot tag.
So, is this a known limitation or should I create a ticket for them to fix it?
Edit:
Opened https://github.com/spring-projects/spring-boot/issues/25552
#ConfigurationProperties is an alternative to #Value and the two are not designed to be used together. It may work with JavaBean-style binding but that would be by accident rather than by design and it shouldn't be relied upon.
Instead of using #Value to alias something bound via #ConfigurationProperties, it's recommended that you do so via some other means. For example you could use one of the approaches suggested in this answer that Marcos Barbero linked to in the comments on your question. Alternatively, you could take some inspiration from this example in the documentation and use a placeholder in application.properties:
prefix.something=${hostname}
Another option would be to register via META-INF/spring.factories an implementation of EnvironmentPostProcessor that adds a PropertySource to the environment to set up the desired aliasing. For the time being, this is probably the best approach if you want to do something in a reusable library. There's an open issue to remove some of the ceremony that's currently involved.
can someone please tell me where I can find the source code that processes #RequestMapping annotation. I want to make a similiar annotation.
I know it's somewhere on https://github.com/spring-projects/spring-framework/
But i haven't found so far where the actual processing takes place.
You can simply plug #RequestMapping text to the search field on the top of GitHub project page to see where that class is used.
Here is the direct link. https://github.com/spring-projects/spring-framework/blob/1204d2aef4afdefb4ba73c86565aab3f5b2a6931/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/annotation/DefaultAnnotationHandlerMapping.java
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.
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.
Is it possible that when I use the "getText("keyName"); in action class, I can specify that pick the value from ENGLISH resource bundle ONLY. Because I just want to use this value for logging purposes.
Any thoughts how can I achieve this?
BR
SC
You can do what you're looking for with:
LocalizedTextUtil.findDefaultText("keyName", Locale.ENGLISH)
This is a utility class in XWork (Struts2) that handles localization.
see these examples for struts internationalization link1,link2
These examples are given using struts1, with some simple modification, you can use them for struts2