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Spring Data Context - lookup placeholder variables from Java map, not properties file

Currently in my data context XML file, it's looking up values to substitute from a application.properties file:
<bean id="applicationProperties" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" lazy-init="default">
<property name="location" value="classpath:application.properties" />
</bean>
<bean id="appleDataSource" class="org.apache.commons.dbcp2.BasicDataSource">
<property name="url" value="${apple.url}" />
</bean>
I'd like to change this from being looked up from the application.properties file, to being read out of a Properties/Map object.
This is because the configuration could come from more than one place (i.e. not just the classpath), and this logic is already implemented in my application.
I've seen MapPropertySource but I think while that can be done when the bean is configured in Java, I'm not sure this logic can be implemented when working with the XML file alone?

Access Variable value in Mapper File of mybatis

I am using Spring and Mybatis in my project . Project can run in any platform like SQL Server Oracle etc.
I am facing 1 Problem i want to access variable value From properties file,application Context file to Mybatis Mapper file.
For.eg :
ApplicationContext.xml - Spring file
config.properties file
in above file want to decalare variable lets say pName = XYZ
i want to access this pName in Mybatis Mapper XML file.
<select id="getValue" parameterType="java.lang.String" >
${pName}
</select>
How is it possible ?if have any other solution most welcome.

To access spring way :
Use
<util:properties id="myPropertyConfigurer" location="classpath:yourpropertiesfile.properties"/>
<context:property-placeholder properties-ref="myPropertyConfigurer" order="1" ignore-unresolvable="true" />
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="applicationDataSource" />
<property name="configLocation" value="classpath:sqlMapConfig.xml" />
<property name="configurationProperties" ref="myPropertyConfigurer"></property>
</bean>
In your mapper xml file :
<select id="searchSomeOne" parameterType="map" .....>
SELECT
${pName} AS module
FROM MY_TABLE
WHERE
COL_ONE = #{moduleName} and
COL_TWO like #{username}
</select>
and define pName=MODULE in the yourpropertiesfile.properties

You can do in this way -
1. Add the below line of code in your mybatis-config.xml file
<properties resource="path/to/config.properties" />
Then you should be able access all the keys as ${keyName} in the mapper file .
Reference from the mybatis docs - http://mybatis.org/mybatis-3/configuration.html#properties

Spring - how to use PropertyPlaceholderConfigurer to dynamically load files

i have the next properties files with Spring Framework
config.properties
with content
environment=devel //posible values: devel, testing, prod
and with the previous environment property, choose some of the following files to load dynamically
config-service1-devel.properties
config-service1-testing.properties
config-service1-prod.properties
config-serviceN-devel.properties
config-serviceN-testing.properties
config-serviceN-prod.properties
and then, with spring i want load the properties, i'm solve to load the first properties file but i dont understand how to use expression language to complete the values of the dependent properties.
<bean id="MainApplicationProperties"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location"
value="file://#{systemProperties['jboss.server.home.dir']}/conf/services.properties" />
<property name="placeholderPrefix" value="$mainProperty{" />
<property name="placeholderSuffix" value="}" />
</bean>
<bean id="SecondApplicationProperties"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
depends-on="MainApplicationProperties">
<property name="locations">
<list>
<value>file://#{systemProperties['jboss.server.home.dir']}/conf/serviceOne/service1-$mainProperty{environment}.properties</value>
<value>file://#{systemProperties['jboss.server.home.dir']}/conf/serviceTwo/service2-$mainProperty{environment}.properties</value>
<value>file://#{systemProperties['jboss.server.home.dir']}/conf/serviceN/serviceN-$mainProperty{environment}.properties</value>
</list>
</property>
</bean>
the error output is the next,
java.io.FileNotFoundException: /..../conf/serviceOne/service1-$mainProperty{environment}.properties (No such file or directory)
my opinion is, the value has not replaced
helpme, thanks

The problem is that when BeanFactoryPostProcessors are starting to be invoked, they are already instantiated. So even thou the first PropertyPlaceholderConfigurer modifies the bean definition of the second PropertyPlaceholderConfigurer, it has no effect as both beans have been already instantiated.

externalizing terracottaconfig property in ehcache.xml file inside Spring framework

There is this tag <terracottaConfig url="host1:9510,host2:9510,host3:9510"/> in ehcache.xml file inside spring web application. I want to externalize url attribute of this tag. Value of URL should be replaced by a property from external file. It will be very helpful if you suggest any solution to this problem.

You can put something like this -
<terracottaConfig url="${terracotta.config.location}" /> , however the big catch is that this will be loaded only from the system properties. It is not resolved from PropertyPlaceHolder as it is not a Spring configuration file.
So if you want to use an external config file, you will basically have to programatically set this system property before the Spring Application starts loading up the ehcache.xml file - one way to do that will be write your custom ServletContextListener to load up your properties file and set the system property based on that, this way when the ehcache.xml is loaded up it would be able to resolve the place holder properly.
Your answer helped me to solve my problem. I just want to add that instead of setting system property through program, I am using util:properties as follows
<bean id="sysProperties" class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
<property name="targetObject" value="#{#systemProperties}"/>
<property name="targetMethod" value="putAll"/>
<property name="arguments">
<util:properties>
<prop key="propertyname_used_in_ecache_xml">#{proerties_defined_using_property_factory['propertyname_defined_in_external_properties_file']}</prop>
</util:properties>
</property>
</bean>
<bean id="cacheManager"
class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean" depends-on="sysProperties">
<property name="configLocation">
<value>classpath:ehcache.xml</value>
</property>
</bean>

PropertyPlaceholderConfigurer + PropertiesFactoryBean only resolving location properties

I am having trouble getting PropertyPlaceholderConfigurer to work in my current configuration. Given the following block of code in my applicationContext.xml:
<bean id="myProperties"
class="org.springframework.beans.factory.config.PropertiesFactoryBean">
<property name="locations">
<list>
<!-- Order matters, last one to create a property wins! -->
<value>classpath:default.properties</value>
<value>file:${MYAPP_PROPERTIES_LOCATION:badurl}/application.properties</value>
<value>file:${user.home}/developer.properties</value>
</list>
</property>
<property name="ignoreResourceNotFound" value="true"/>
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertiesPlaceholderConfigurer">
<property name="properties" ref="myProperties"/>
<property name="systemPropertiesModeName" value="SYSTEM_PROPERTIES_MODE_OVERRIDE"/>
<property name="searchSystemEnvironment" value="true"/>
</bean>
Then in the default.properties files I have the following (these are test properties):
property1=prop1val
property2=${property1}
What works: the propertyConfigurer correctly resolves both the environment variable MYAPP_PROPERTIES_LOCATION and the System variable user.home. However, then the final properties object is created by the factory bean, the resulting properties are [property1=prop1val, property2=${property1}].
With this configuration, how can I get the properties inside the myProperties bean to resolve their placeholders?? I have done plenty of research to include tracing through the spring code - and I can see how and why this isn't being done. I'm hoping there is some setting I'm just missing! This is my first post so be easy on me :)

You have proper configuration of spring and the property files. That why you are being able to read the data from the file. Everything is proper with what spring is doing too, let me explain a bit more....
As you told below is your property file,
property1=prop1val
property2=${property1}
Remember, it is a pretty text file with key value pairs and it can not take variables. Here, if you are intended to copy the value of property1 to property2 dynamically it is not going to happen. That is not the way we are supposed to use a property file.
Property file is supposed to be simple text file with key-value pairs. So, keep the keys atomic so that you can construct the required data logically from the application or inside your applicationcontext.xml file.

I am not sure why you are using PropertiesFactoryBean. Can you please try just the following (Not sure if you already tried it and any issues you faced)
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<!-- Order matters, last one to create a property wins! -->
<value>classpath:default.properties</value>
<value>file:${MYAPP_PROPERTIES_LOCATION:badurl}/application.properties</value>
<value>file:${user.home}/developer.properties</value>
</list>
</property>
</bean>