I wrote a Maven plugin which instantiates a Spring context. I want to be able to configure the Spring context using a properties file in the project classpath. In the plugin context XML I have:
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<value>classpath:configurator.properties</value>
</property>
</bean>
When I run the proper plugin goal in the Maven project using my plugin, Spring can't read the configurator.properties file from the target/classes folder.
How should I configure my mojo to allow Spring running in my plugin to read the properties file from the project classpath?
Related
Is it possible to create a data source by reading the values from an external file which is not bundled with WAR in spring application.
You can use the #PropertySource annotation to load your db properties and you can load the properties from file location like below:-
#PropertySource("file:${app.home}/db.properties")
reference link here:-
https://www.mkyong.com/spring/spring-propertysources-example/
For XML based configuration sample code could be like below:-
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>${app.home}/db.properties</value>
</list>
</property>
</bean>
you can setup your datasource in any properties file, and then you have to provide the classpath for that file in your catalina.sh where you are running your war.
don't forget to load that property file in in your application.
There are a JAR A and JAR B, both have messages.properties in classpath /
And there is WAR C, which has dependencies on JAR A and JAR B.
And when I start WAR C I can only get i18n message from JAR A or JAR B.
So, how can Spring support multiple messages.properties files in classpath?
BTW, WAR C is a spring boot project, and spring.messages.basename=messages
Problem solved.
According to this question Does Spring MessageSource Support Multiple Class Path?
have to ditch ResourceBundleMessageSource and write a custom implementation of MessageSource (most likely by subclassing AbstractMessageSource) which uses PathMatchingResourcePatternResolver to locate the various resources and expose them via the MessageSource
I make a copy of ReloadableResourceBundleMessageSource and write the code by this guide and problem solved.
Yes, Spring supports loading multiple Properties. But properties should be unique. If we have same properties in the two Properties Files then the file which will be loaded later will override the previous Properties from previous file.
For example, if the Properties file from JAR A has two properties {USERNAME, PASSWORD} and JAR B Properties file also has the same two properties then you'll get {USERNAME, PASSWORD} from the file which is loading later.
You can use wildcard to import all the Property Files with same name on your classpath.
In Spring you can mention different Properties files in the form of Array as follows:
<context:property-placeholder
location="classpath:war.properties,
classpath*:message.properties"
ignore-unresolvable="true"/>
or
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:war.properties</value>
<value>classpath*:message.properties</value>
</list>
</property>
<property name="ignoreUnresolvablePlaceholders" value="true"/>
</bean>
My application is a servlet, spring 4 application where the spring jar is in the tomcat lib.
Freemarker jar is in WEB-INF/lib.
I am getting this error when starting the server
java.lang.ClassNotFoundException: freemarker.template.TemplateHashModelEx
This error disappears when I move the freemarker jar to tomcat lib directory.
It appears to me that spring 4 webmvc jar which contains Configurer class is unable to see WEB-INF/lib freemarker jar. I do not understand why freemarker jar in WEB-INF/lib folder is not visible to spring jar in tomcat lib folder.
What may I do to resolve this situation.
My spring configuration is as follows
<bean id="freemarkerConfiguration" class="org.springframework.ui.freemarker.FreeMarkerConfigurationFactoryBean">
<!--Turn this off to always load via SpringTemplateLoader-->
<property name="preferFileSystemAccess" value="false"></property>
<property name="templateLoaderPath" value="classpath:/"></property>
</bean>
<bean id="freemarkerConfigurer" class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
<property name="configuration" ref="freemarkerConfiguration" />
</bean>
add the following code in pom.xml
<dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker-gae</artifactId>
<version>2.3.18</version>
</dependency>
This works for me.
I've had similar issues before and I've solved it.
Environment：Idea 、 Maven
Open File->Project Structure->Artifacts
Right click on the Project Library in the "Available Elements" to put in output root(WEB-INF/lib).
Restart tomcat and you'll see the problem was solved.
In my IntelliJ project, under the project root, there is a config folder.
This is where various .properties files are located.
Within the application, these are made available to Spring in the standard way, using a propertiesConfigurer.xml file:
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>file:config/${name}.properties</value>
</list>
</property>
<property name="ignoreResourceNotFound" value="true"/>
</bean>
The reason they are accessed using 'file', is that eventually they may be external to the deployed jar.
This works, both when running the application, and when running unit tests.
I also wish to access files which are only for use when running tests.
I have placed these under:
test
--- resources
-------META-INF
----------spring
-------------config
I have added this line to the list of locations within the same propertiesConfigurer.xml:
<value>classpath*:META-INF/spring/config/${name}.properties</value>
This is not working. No file or resource exception is being thrown, but none of the properties defined in the test file are being resolved within the application.
Within the IntelliJ Project Settings->Modules, src\test\resources is listed as a context root.
Also, on the file system, under:
...\target\test-classes\META-INF\spring\config
the test property files exist.
What is the correct way to access them?
Thanks
I am trying to move a working spring WAR to OSGI environment (in glassfish 3.1 and blueprint, spring 3.0.5).
The application loads properties file from disk, like this:
<bean id="myProperties" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="${my_conf}/my.properties"/>
<property name="systemPropertiesModeName" value="SYSTEM_PROPERTIES_MODE_OVERRIDE"/>
</bean>
I see in debugger that ${my_conf}/my.properties is translated to the existing path (c:\conf\my.properties)
I use the property jms.url defined in my.properties in the next bean declaration
<amq:broker useJmx="false" persistent="false" brokerName="embeddedbroker">
<amq:transportConnectors>
<amq:transportConnector uri="tcp://${jms.url}"/>
<amq:transportConnector uri="vm://embeddedbroker" />
</amq:transportConnectors>
</amq:broker>
And in deployment I get an exception "Could not resolve placeholder ${jms.url}"
Why it fails? Is there another way to load properties from file on disk?
thank you
Since its an OSGI environment, you will need spring-osgi-core jar added to your application. Take a look at this link to configure property-placeholder for OSGI framework.
It isn't a solution, but an explanation of my problem.
The problem is related to this bug in spring 3 and osgi.
I had to open spring logs to debug level to understand it.