using spring expressions

[srini carry]

I need help in using the below configration using spring expressions


I have a properties object which has system properties

here is the spring configration

<bean id="systemProperties"  class="com.blah.blah.blah.Myproperties"/>

to inject a property from this bean into other bean I do this

	<bean id="serviceUrl" class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
	  <property name="targetObject" ref="systemProperties" />
	  <property name="targetMethod"><value>getPropertyValue</value></property>
	  <property name="arguments">
	    <list>
	      <value>ssi_launch_url</value>
	    </list>
	  </property>
	</bean>

and I inject the bean serviceUrl into other beans.

<bean id="somebean" class="blah.....blah.SomeClass">
<property name="someproperty" ref="serviceUrl " />
</bean>

is there anyway I can avoid creating aserviceUrl bean and directly inject the propery into other beans using spring expressions?

Please advice

[Mark Spritzler]

Yes.

#{systemProperties['ssi_launch_url']}

so if I have a bean class that I want to assign a property of that value I can do it.

<bean id="someClass" class="blah.blah.SomeClass">
    <property name="someProperty" value="#{systemProperties['ssi_launch_url']}"/>
</bean>

Mark

[srini carry]

Mark Spritzler wrote:Yes.

#{systemProperties['ssi_launch_url']}

so if I have a bean class that I want to assign a property of that value I can do it.

<bean id="someClass" class="blah.blah.SomeClass">
    <property name="someProperty" value="#{systemProperties['ssi_launch_url']}"/>
</bean>

Mark

my object is this

public class AuditProperties  implements  ArtmsProperties{
	
	
	Map<String, String>  prop= [
	                            mailhost:"somevalue",
	                            fromaddress:"somevalue",
	                            auditJobFailedToaddress:"somevalue",
	                            actionTakenDesc:"somevalue",
								find_grants_service_url:"somevalue",
								assec_user_name:"somevalue",
								artms_dummy_user:"somevalue",
								ORG_ID:"somevalue",
								DFI_LEAD_NOTIFICATION_DELAY:"somevalue",
								ssi_launch_url:"somevalue",
								ssi_launch_system_info_id:"somevalue"
								
	                           ]
	
	@Override
	public String getPropertyValue(String propertyName) {
		String value=prop.get(propertyName);
		if(StringUtils.isBlank(value)){
			throw new IllegalStateException(MessageFormat.format("No property value found for key {0}", propertyName));
		}
		return value;
	}
	
}

and I tried this

#{systemProperties.getPropertyValue('ssi_launch_url')}

this did not work cant I do this ?

[Mark Spritzler]

Well because it is a getter, you can do, and one other thing, I think systemProperties is a predefined implicit reference in Spring Expression Language.

so maybe the AuditProperties bean should be called auditProperties instead

so change the bean name to auditProperties and try

Wait a second. Why aren't those values just in a .properties file that you load in.

so in a file called auditProperties.properties put

mailhost=somevalue  
fromaddress="somevalue
auditJobFailedToaddress=somevalue
actionTakenDesc=somevalue
find_grants_service_url=somevalue
assec_user_name=somevalue
artms_dummy_user=somevalue
ORG_ID=somevalue
DFI_LEAD_NOTIFICATION_DELAY=somevalue
ssi_launch_url=somevalue
ssi_launch_system_info_id=somevalue

Then you can load the file via

<util:properties id="auditProperties" location="locationOf/auditProperties.properties/>

Then you can use


#{auditProperties['ORG_ID']}

What you are currently doing is reinventing the wheel. Even if you didn't want it in a .properties file but still in code, you are reinventing the wheel because Java SDK comes with a class called Properties.


Mark">

[srini carry]

This is some example I can ofcourse put this in a property file , but this is a groovy file which I can change at runtime and app gets updated automatically , Please advice if I have this spring bean and I want to call getPropertyValue using spring expressions how to ?

Mark Spritzler wrote:Well because it is a getter, you can do, and one other thing, I think systemProperties is a predefined implicit reference in Spring Expression Language.

so maybe the AuditProperties bean should be called auditProperties instead

so change the bean name to auditProperties and try

Wait a second. Why aren't those values just in a .properties file that you load in.

so in a file called auditProperties.properties put

mailhost=somevalue  
fromaddress="somevalue
auditJobFailedToaddress=somevalue
actionTakenDesc=somevalue
find_grants_service_url=somevalue
assec_user_name=somevalue
artms_dummy_user=somevalue
ORG_ID=somevalue
DFI_LEAD_NOTIFICATION_DELAY=somevalue
ssi_launch_url=somevalue
ssi_launch_system_info_id=somevalue

Then you can load the file via

<util:properties id="auditProperties" location="locationOf/auditProperties.properties/>

Then you can use


#{auditProperties['ORG_ID']}

What you are currently doing is reinventing the wheel. Even if you didn't want it in a .properties file but still in code, you are reinventing the wheel because Java SDK comes with a class called Properties.


Mark">

[Mark Spritzler]

srini carry wrote:This is some example I can ofcourse put this in a property file , but this is a groovy file which I can change at runtime and app gets updated automatically , Please advice if I have this spring bean and I want to call getPropertyValue using spring expressions how to ?

I don't understand the question. If I have an object that is a bean, has an id, and has a property. I get it via bean name dot property name. or if the property requires a dot in the name, then use brackets. Check out the Core Spring documentation.

#{beanName.propertyName} or

#{beanName['propertyName]

Both work.

Mark