LocaleResolver in Spring - java

I am using session locale resolver for my application. I am showing the languages in dropdown. if the user selects on any of the language then repopulates all values from that language.
<property name="interceptors">
<list>
<ref bean="localeChangeInterceptor" />
</list>
</property>
<bean id="localeChangeInterceptor"
class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
<property name="paramName" value="languageCode" />
</bean>
<bean id="localeResolver"
class="org.springframework.web.servlet.i18n.SessionLocaleResolver" />
But its is not reading it from the session. Always it considers the defaultlanguage from browser setting.
Please help on this.

You need to obtain the locale in this way:
Locale loc=RequestContextUtils.getLocale(request);

In Spring 4.0 we can Also use LocaleContextResolver.getLocale() method as well.

Related

Spring config properties from database and properties

I asked a similar question, but based on the responses, I did a bad job describing what I am after. I have a spring 4 webapp that loads properties from a properties file. We consume those properties both via the "${proper.name"} expressions in spring, as well as by injecting a properties object into some of our classes.
We want to move most of the properties to a database table and make them reloadable. However, a few need to stay in local properties, potentially overriding the database setting. These should also be loaded dynamically after the app is running.
I know that once a particular bean is injected, it won't get reloaded, that doesn't concern me, it's up to that module to handle that. But I am having trouble getting the behavior I want. In particular, I have implemented an AbstractConfiguration from apache commons configuration to get the dual source and overriding I am after. But while it works for injecting the properties object, expressions loaded with "${prop.name}" don't work at all.
How can I get them to work? Did I override the wrong thing? Is it just some config detail?
<bean id="sysProperties" class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
<property name="targetObject" ref="databaseConfigurator" />
<property name="targetMethod" value="getProperties"/>
</bean>
<bean id="databaseConfigurator" class="my.util.config.MyDatabaseConfigurator">
<property name="datasource" ref="dataSource" />
<property name="propertyFile" value="/WEB-INF/my.properties" />
<property name="applicationName" value="ThisApp" />
</bean>
<bean id="dbConfigFactory" class="org.apache.commons.configuration.ConfigurationConverter" factory-method="getProperties">
<constructor-arg ref="databaseConfigurator" />
</bean>
I haven't tested this, but I think it might work.
<bean id="sysProperties" class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
<property name="targetObject" ref="databaseConfigurator" />
<property name="targetMethod" value="getProperties"/>
</bean>
<bean id="databaseConfigurator" class="my.util.config.MyDatabaseConfigurator">
<property name="datasource" ref="dataSource" />
<property name="propertyFile" value="/WEB-INF/my.properties" />
<property name="applicationName" value="ThisApp" />
</bean>
<bean name="PropertyPlaceholderConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="properties" ref="CommonsConfigurationFactoryBean"/>
</bean>
<bean name="CommonsConfigurationFactoryBean" class="org.springmodules.commons.configuration.CommonsConfigurationFactoryBean">
<constructor-arg ref="databaseConfigurator"/>
</bean>

Change DateFormat or Default Locale in Struts2 webapp

I have been having problem with my DateFormat. en_US, en_UK, en_IN are all same for my webapp. The only thing that matters is dateformat to be used throughout the webapp.
First i tried to override the dateformat of en locale, apparently i failed to find any good solution on how to do that.
Hence i planned to change the default locale to en_IN, because we use the date format as dd/mm/yy
No effect, then en_GB... but no luck.
Please note that i did restart tomcat after making changes but no luck.
my dispatcher-servlet.xml in WEB-INF sets it as follows.
<bean id="localeChangeInterceptor" class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
<property name="paramName" value="request_locale" />
</bean>
<!-- <mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/locale*"/>
<bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor" >
<property name="paramName" value="request_locale" />
</bean>
</mvc:interceptor>
</mvc:interceptors>
-->
<bean id="localeResolver" class="org.springframework.web.servlet.i18n.SessionLocaleResolver">
<property name="defaultLocale" value="en" />
</bean>
<bean id="mappingHandler" class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping" >
<property name="interceptors">
<list>
<ref bean="localeChangeInterceptor" />
</list>
</property>
</bean>
Adding
<constant name="struts.locale" value="en_GB" />
to struts.xml did the job.
If there are any possible side-effects, please let me know

How to hide request parameter value in url using Spring MVC

I'm working on language changes for my page.when the client clicks on any language, page should load in that particular language. For that I configured springs.xml like this
<bean id="localeChangeInterceptor" class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
<property name="paramName" value="lang" />
</bean>
<bean id="localeResolver" class="org.springframework.web.servlet.i18n.CookieLocaleResolver">
<property name="defaultLocale" value="en" />
</bean>
<bean id="handlerMapping" class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
<property name="interceptors">
<ref bean="localeChangeInterceptor" />
</property>
</bean>
The page was loading fine, when I'm give the url like this, site/companykey?lang=french,
Now my problem is , I want to hide the param value which I have given ?lang=french.
Is there any way to hide that value from the url ??
locate the form in jsp/html page in which you have included these tags used for changing locale. change the attribute method="POST". it will make sure that the parameter will pass to the mapped action class without appearing in the url.

using client machine locale for i18n

I'm trying to get my application work according to the OS locale of the client machine. For now it works with the locale of server machine. I'm using string frmae work. Apache Tomcat 7 is used as the server. Here is the configuration I used. Any help would be appriciated.
<bean id="localeResolver"
class="org.springframework.web.servlet.i18n.SessionLocaleResolver">
<property name="defaultLocale" value="en" />
</bean>
<bean id="localeChangeInterceptor"
class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
<property name="paramName" value="language" />
</bean>
<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping" >
<property name="interceptors">
<list>
<ref bean="localeChangeInterceptor" />
</list>
</property>
</bean>
<!-- Register the welcome.properties -->
<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basenames">
<list>
<value>i18n.api/api</value>
<value>i18n.exceptions/exceptions</value>
<value>i18n.common/common</value>
<value>i18n.login/login</value>
<value>i18n.plan/plan</value>
<value>i18n.customer/customer</value>
<value>org.springframework.security.messages</value>
<value>org.hibernate.validator.ValidationMessages</value>
</list>
</property>
</bean>
Please see supported handler method argument types on Spring doc. You can inject the user's Locale on your handler method like this:
#RequestMapping("/home")
public String home(Locale userLocale) {
// do something with userLocale
return "home";
}
Locale is of type java.util.Locale.
Also have a look at getLocale() method of ServletRequest. The client has to provide Accept-Language header on their request, otherwise server's locale is used. I'm assuming Spring behave in the same fashion as this

Upgrading to springframework.scheduling.concurrent?

As of Spring 3.0 the ScheduledTimerTask is deprecated and I can't understand how to upgrade to org.springframework.scheduling.concurrent.
<bean id="timerFactoryBean" class="org.springframework.scheduling.timer.TimerFactoryBean">
<property name="scheduledTimerTasks">
<list>
<ref bean="onlineTimeSchedule" />
</list>
</property>
</bean>
<bean id="onlineTimeSchedule" class="org.springframework.scheduling.timer.ScheduledTimerTask">
<property name="timerTask" class="com.example.OnlineTimerTask" />
</property>
<property name="period" value="60000" />
<property name="delay" value="1000" />
</bean>
Where the OnlineTimerTask extends java.util.TimerTask. It's simple task which publishes a message to publisher every minute. I checked the documentation, but nothing.. I can't understand which way to use from the concurrent package and which suits the best.
Also I want to turn this xml into #Bean in Java.
EDIT: So I tried to implement the xml with #Bean and #Configuration instead and here is what I got.
#Configuration
public class ContextConfiguration {
#Bean
public ScheduledExecutorFactoryBean scheduledExecutorFactoryBean() {
ScheduledExecutorFactoryBean scheduledFactoryBean = new ScheduledExecutorFactoryBean();
scheduledFactoryBean.setScheduledExecutorTasks(new ScheduledExecutorTask[] {onlineTimeSchedule()});
return scheduledFactoryBean;
}
#Bean
public ScheduledExecutorTask onlineTimeSchedule() {
ScheduledExecutorTask scheduledTask = new ScheduledExecutorTask();
scheduledTask.setDelay(1000);
scheduledTask.setPeriod(60000);
scheduledTask.setRunnable(new OnlineTimerTask());
return scheduledTask;
}
}
Will the code above be correct replacement for xml? Will in my case the setScheduledExecutorTasks work properly? I mean will the referencing to the same bean instance, if onlineTimeSchedule() is called more than once, will work here?
scheduledFactoryBean.setScheduledExecutorTasks(new ScheduledExecutorTask[] {onlineTimeSchedule()});
Use org.springframework.scheduling.concurrent.ScheduledExecutorFactoryBean in place of org.springframework.scheduling.timer.TimerFactoryBean and use org.springframework.scheduling.concurrent.ScheduledExecutorTask in place of org.springframework.scheduling.timer.ScheduledTimerTask. You will need to adjust the property names and values as needed but, that should be pretty self evident.
Optionally, you could refactor your com.example.OnlineTimerTask to not extend java.util.TimeTask as the ScheduledTimerTask only requires a runnable.
Spring 4 configuration - Below configuration working after spring migration from 3.2.x to 4.6.x
<bean id="schedulerTask"
class="org.springframework.scheduling.support.MethodInvokingRunnable">
<property name="targetObject" ref="springJmsListnerContainer" />
<property name="targetMethod" value="execute" />
</bean>
<bean id="timerTask" class="org.springframework.scheduling.concurrent.ScheduledExecutorTask">
<property name="runnable" ref="schedulerTask" />
<property name="delay" value="100" />
<property name="period" value="60000" />
</bean>
<bean class="org.springframework.scheduling.concurrent.ScheduledExecutorFactoryBean">
<property name="scheduledExecutorTasks">
<list>
<ref bean="timerTask" />
</list>
</property>
</bean>
The answer is - add one "runnable" field
<bean id="scheduledExecutorTask"
class="org.springframework.scheduling.concurrent.ScheduledExecutorTask">
<!-- wait 10 milli seconds before starting repeated execution -->
<property name="delay">
<value>10</value>
</property>
<!-- run every 1 second -->
<property name="period">
<value>1000</value>
</property>
<property name="runnable">
<ref bean="checkInvokingTask"/>
</property>
</bean>

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