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Spring : Initialization of properties before any bean creation

I have the project structure as following -
Facade -> Service-> DAO
In the DAO layer, when the beans are initialized then many dependencies are injected from a property file. Therefore, the properties file must be read first and then the remaining dao beans must be created. When the application is started then it gives an error that Spring cannot resolve a placeholder.
The DAO-application-context.xml is like-
<bean
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="prop">
<value>app.properties</value>
</property>
</bean>
<import resource = "a-dao.xml" />
<import resource = "b-dao.xml" />
<import resource = "c-dao.xml" />
Now in all the child application contexts i.e. a-dao, etc, we have-
<bean ....>
<property name = "xyz">
<value>${appValue}<value/>
</property>
<bean>
The error received is that appValue cannot be resolved. I think that it may be due to incorrect sequence of bean creation. However, the same config is working in another larger project.
I have checked Order of Spring Bean Initialization but implementing that solution would not be feasible. Is there any other way ?

Reg this Block of Configuration, property prop seems to be wrong
<bean
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="prop">
<value>app.properties</value>
</property>
</bean>
According to the Spring documentation
You could use the property location or locations to set the one or multiple values of the properties file.
So the code should be refactored to
<bean
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location">
<value>app.properties</value>
</property>
</bean>

Spring Could not resolve placeholder while loading config file form filesystem

I'm facing an issue with spring placeholder configuration. I've searched the web trying to find a solution but nothing worked for me at all.
We had used to use spring configurer for loading our .properties files and everything worked fine since the configfiles where located in META-INF dir.
Now we need to have our config files located in /etc/sep/properties directory or in some other filesystem directory.
I tried to use
<context:property-placeholder location="file:/etc/sep/properties/jdbc.properties" />
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.databaseurl}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="initialSize" value="${jdbc.initialPoolSize}" />
</bean>
the content of /etc/sep/properties/jdbc.properties is following:
cat /etc/sep/properties/jdbc.properties
jdbc.driverClassName= org.postgresql.Driver
jdbc.dialect=org.hibernate.dialect.PostgreSQLDialect
jdbc.databaseurl=jdbc:postgresql://localhost:5432/sep?characterEncoding=utf8&autoReconnect=true
jdbc.username=****
jdbc.password=****
I also tried using another approach as folows, but it worked for me neither.
<context:property-placeholder properties-ref="prop" />
<util:properties id="prop" location="reso"/>
<bean id="reso" class="org.springframework.core.io.FileSystemResource">
<constructor-arg index="0" value="/etc/sep/properties/jdbc.properties" />
</bean>
I don't know if it matters but we are using maven building, so that the application-context.xml is placed in core-lib.jar which is used in our web-app as dependency. Other config, such as logging work great.
I would be grateful for any suggestions.

This is just an idea but it may work,
Have you checked that the .property file has the correct access rights? I mean, is it accessible by the user that runs your Spring application?
It would help a lot if you show the error displayed.

Ok, I've finally resolved it. There were two things about it.
At First: My tomcat server was not updating deployed files properly.
And finally I'm not pretty sure if it helped, but we added one more slash after file: specification, so that the result was:
<context:property-placeholder location="file:///etc/sep/properties/*.properties" />
Now it is loading all config files properly.

Spring ResourceBundle not found for base name

I'm having problems taking the message values to a properties file.
I'm using intelliJ IDEA and i have a package
com.test.messages
and inside I have the messages.properties file.
Here is my xml
<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basename" value="com.test.messages.messages"/>
</bean>
When I restart the server this is the WARNING i get
WARNING: ResourceBundle [com.test.messages.messages] not found for MessageSource: Can't find bundle for base name com.test.messages.messages, locale en_US
Any ideas?

Do not keep properties in packages.
Resources directory is a standart place to keep internal properties.
/src/main/resources
or
/src/test/resources
If you want to keep properties separated from the project - use something this kind of spring configuration:
<bean id="props" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" >
<property name="ignoreResourceNotFound" value="true"/>
<property name="localOverride" value="true"/>
<property name="locations">
<list>
<value>classpath*:messages.properties</value>
<value>file:messages.properties</value>
</list>
</property>
</bean>
So you'd be able to override internal properties with external (don't forget to add the to a classpath using -cp).
Anyway the declaration of the been will look like this:
<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basename" value="${property.name}"/>
</bean>

you should have a file in your project as such:
src\main\resources\com\test\messages.properties

Although I am not IDEA expert, I know that resources such as .property files placed in the source code hierarchy are copied to the classpath when using the IDE alone. However, if you use maven, then it takes over the build and whatever is in the java path is not copied by default. You have to place all your classpath resources in src\main\resources and under whatever hierarchy mirrors the package name to have the same result. So in your case :
src\main\resources\com\test\messages\messages.properties
and maven will copy it properly

I know this is old question, but let me drop my solution :)
Source folder (resources is not package):
/src/main/java/
somepackage/abc.java
/src/main/resources/
messages.properties
Eclipse default output java build path:
myProject/build/classes
Eclipse default deploy path:
WEB-INF/classes
My project's spring context XML file path:
/src/main/webapp/WEB-INF/context.xml
Inject resource bundles,
<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basenames" value="messages"/>
</bean>
As Azee said keeping properties in package is not encourage. In case, messages.properties is in resources package as below:
/src/resources/messages.properties
context.xml should be like:
<property name="basenames" value="resources/messages"/>

How to load data from property file into bean property values?

I am following the following article.
http://www.mkyong.com/spring/spring-quartz-scheduler-example/
Everything works fine.
<bean id="simpleTrigger"
class="org.springframework.scheduling.quartz.SimpleTriggerBean">
<property name="jobDetail" ref="runMeJob" />
<property name="repeatInterval" value="5000" />
<property name="startDelay" value="1000" />
</bean>
I created a property file app.properties which has
repeatInterval = 5000
startDelay = 1000
I want to load these data into bean properties. Right now I have to hard code the values into the xml file.
I want to be able to load the data from property file into the bean properties. Is it possible?
EDIT:
I have
<property name="repeatInterval" value="5000" />
What I am looking for is a way to make it
<property name="repeatInterval" value= "get 5000 from property file" />

To find a file myPropertyFileName.properties that is on your classpath and load it into your spring config, create the following bean:
<bean id="myPropertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:myPropertyFileName.properties"/>
<property name="placeholderPrefix" value="${props:"/>
</bean>
Then use a property name defined like
repeatInterval=5000
like this:
<property name="repeatInterval" value="${props:repeatInterval}"/>

Use Spring propertyPlaceholderConfigurer to achieve this. Follow this guide.

I have run into something similar in the past. I needed to load a bunch of beans using Spring but I wanted them to be user editable bean files. So I didn't want to include them in the jar packaging. What I did was create my user-defined bean files outside the jar but in a know relative location. My packaged bean definition file referenced the beans defined in the user-defined bean file and when I loaded the application context I provided both files (user-defined & packaged).
Bit unorthodox but it worked.

Trying to setup externalizing properties in spring

I'm building my project with maven so according to maven way, config should be in src/main/conf , how can I say to my spring application context that that is where jdbc.properties is found? Here is example bean :
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="jdbc.properties" />
</bean>
Spring assumens that this configuration is inside src/main/webapp/WEB-INF, I hope I've been clear if not I'll rephrase my question thank you

I'm building my project with maven so
according to maven way, config should
be in src/main/conf
Actually, configuration data should generally go in src/main/resources, that way it will be on the classpath and you can reference your property file like:
<property name="location" value="classpath:jdbc.properties" />

I think it is not quite clear as to what a "config file" means. I am thinking it is the config files used by the other maven plugins (such as surefire plugins, assembly plugins etc).
Surely in the 10+ web app projects that I have worked the bean files, jdbc.properties files have all been under src/main/resources

Try this
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="src/main/config/jdbc.properties" />
</bean>