I am really stuck on this one... Help! :)
I am using j2ee:jndi lookup for a property file. The following works fine:
<bean class="org.springframework.core.io.FileSystemResource">
<constructor-arg>
<jee:jndi-lookup id="myProps" jndi-name="myProps" resource-ref="true" />
</constructor-arg>
</bean>
However, I want to handle the case where the jndi lookup fails but will fall back on a default file located in WEB-INF/classes folder. If I use the default-value as below, the webapp throws an exception complaining that it cannot find the file "classpath:myprops.properties"
<bean class="org.springframework.core.io.FileSystemResource">
<constructor-arg>
<jee:jndi-lookup id="myProps" jndi-name="myProps" resource-ref="true"
default-value="classpath:myprops.properties" />
</constructor-arg>
</bean>
However, if I hard-code a specific path for default-value, then it works fine, but that is unacceptable as a final solution.
Thus, my issue is how to use "classpath:" so that it gets properly resolved?
This is the overall usage I'm employing:
<bean id="authServerProperties"
class="org.springframework.beans.factory.config.PropertiesFactoryBean">
<property name="ignoreResourceNotFound" value="true"/>
<property name="location">
<bean class="org.springframework.core.io.FileSystemResource">
<constructor-arg>
<jee:jndi-lookup id="myProps" jndi-name="myProps" resource-ref="true"
default-value="classpath:myprops.properties" />
</constructor-arg>
</bean>
</property>
.....
</bean>
Let Spring use its built-in PropertyEditor support to decide on the type of resource, rather than supplying an explicit FileSystemResource bean as this won't work with classpath resources (it needs to be configured with a path on the file system). Instead you should use something like
<bean id="authServerProperties"
class="org.springframework.beans.factory.config.PropertiesFactoryBean">
<property name="ignoreResourceNotFound" value="true"/>
<property name="location" ref="myProps" />
</bean>
<jee:jndi-lookup id="myProps" jndi-name="myProps" resource-ref="true"
default-value="classpath:myprops.properties"/>
Here we are setting the location to be a string value and allowing Spring to convert that to the appropriate resource type, so if you have
<env-entry>
<env-entry-name>myProps</env-entry-name>
<env-entry-type>java.lang.String</env-entry-type>
<env-entry-value>file:///Users/something/myProps.properties</env-entry-value>
</env-entry>
in your web.xml, it will use a UrlResource with the given file URL, otherwise it will create a ClasspathResource to look for the file myprops.properties.
Related
I am developing a Spring web application where I am using JMS as well as some datasource connection.
Now Instead of hardcoding the JNDI names of DataSource/Jms Connection Factory,I want to read them from a external properties file.
I used the following configuration::
<bean id="myProps" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations" value="classpath*:myFile"/>
<property name="ignoreUnresolvablePlaceholders" value="true"/>
</bean>
`<jee:jndi-lookup` id="dataSource" jndi-name="${DS_JNDI}" expected-type="javax.sql.DataSource"/>
But during deployment time it is throwing an error in weblogic:::
javax.naming.NameNotFoundException: Unable to resolve '${DS_JNDI}'. Resolved ''; remaining name '${DS_JNDI}'
Is it like that I cannot put a property file entry when using <jee:jndi-lookup>???
you should remove the star after classpath, and add properties of file extension
<bean id="myProps" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations" value="classpath:myFile.properties"/>
<property name="ignoreUnresolvablePlaceholders" value="true"/>
</bean>
<bean id="myProperties" class="org.springframework.beans.factory.config.PropertiesFactoryBean">
<property name="locations">
<list>
<value>classpath*:myFile.properties</value>
</list>
</property>
</bean>
This is the correct solution of the problem.I think from Spring5.x onwards it has stopped appending ".properties" extension.
I have a bean config file as follows
<bean id="myFactory" class="com.public.Factory">
<property name="dataSourceAdaptor" ref="${value.from.property file}Adaptor" />
</bean>
How do i achieve this.
I added the following to top of the config file
<util:properties id="myProperties" location="classpath:app.properties"/>
and then tried to refer to the value using ${} but i get an error stating ${value.from.property file}Adaptor is not a valid bean
I cannot put the whole name (xyzAdaptor) in the property file as the value in the property file is an institution and there are multiple adaptors for each institution.
for example xzyDisplayAdaptor, xyzProductAdaptor, xyzDatasourceAdaptor
The xyz client can change to say abc client and i want to be able to change the value in property file to abc and all the abc related beans will be injected.
The util:properties tag is used to create an instance of java.util.Properties. I think what you need is a PropertyPlaceholderConfigurer.
e.g.,
<bean id="propertyPlaceholderConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" scope="singleton">
<property name="searchSystemEnvironment" value="true" />
<property name="ignoreResourceNotFound" value="true" />
<property name="locations">
<list>
<value>classpath:app.properties</value>
</list>
</property>
</bean>
Try this with Spel:
<util:properties id="myProperties" location="classpath:app.properties"/>
<bean id="myFactory" class="com.public.Factory">
<property name="dataSourceAdaptor" ref="#{'${value.from.property file}'+'Adaptor'}" />
</bean>
I've got two properties files:
environment.properties:
- project.host.db3.database.name=oracle
application.properties:
- database.name=${project.host.db3.database.name}
The first one represents the environment variables and the second one the properties to be used in a spring project, in this configuration i try to set the environment.properties but of course it doesn't work:
<bean id="systemPropertiesLoader"
class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
<property name="targetObject" value="#{#systemProperties}" />
<property name="targetMethod" value="putAll" />
<property name="arguments">
<util:properties location="classpath:environment.properties" />
</property>
</bean>
<bean id="propertyPlaceholderConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
depends-on="systemPropertiesLoader">
<property name="locations">
<list>
<value>classpath:application.properties</value>
</list>
</property>
<!-- bean using database.name -->
Is it doable?, and if not, how do people have agnostic properties in their projects (like database.name), and only one file (war, jar, etc.) to be deployed?
Well, it seems it's doable for beans xml defined as long as you define your properties it like this:
<bean id="propertyPlaceholderConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
depends-on="systemPropertiesLoader">
But if you ever try to access the properties from a servlet:
this.getClass().getClassLoader().getResourceAsStream("application.properties");
chances are you get this:
bad port configuration: ${project.host.db3.database.port}
java.lang.NumberFormatException: For input string: "${project.host.db3.database.port}"
In answer to yorkw, now i can have the same war to be deployed in several environments and configure the host with -Denvironment=development, so i can deploy a properties file for development, production, etc. and simply use:
<bean id="systemPropertiesLoader"
class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
<property name="targetObject" value="#{#systemProperties}" />
<property name="targetMethod" value="putAll" />
<property name="arguments">
<util:properties location="classpath:**${environment}/**environment.properties" />
</property>
</bean>
Otherwise i should have the application.properties substituted before deployment for every environment. I'm sure there are better solutions than this.
Environment: Windows server 2003, Spring 3.0, Tomcat 6
How can I reference a JNDI property inside a PropertyPlaceholderConfigurer?
Specifically, I'm using JNDI to look up a java.lang.String that represents a path to
a property file needed by my webapp
<jee:jndi-lookup id="mypropsfile1" jndi-name="myPropsFile1" resource-ref="true"/>
<jee:jndi-lookup id="mypropsfile2" jndi-name="myPropsFile2" resource-ref="true"/>
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="ignoreUnresolvablePlaceholders" value="true"/>
<property name="locations">
<array>
<value>how to use mypropsfile1 here ??</value>
<value>how to use mypropsfile2 here ??</value>
</array>
</property>
</bean>
My "jee:jndi-lookup"s are working AFAIK. My problem seems to be how to reference JNDI resources
inside the tag pair
Thanks in advance!
Mark
Your approach may not work Mark, this is because PropertyPlaceHolderConfigurer is a BeanFactoryPostProcessor and gets invoked at the point when the bean definitions are created, whereas the jndi lookup happens post this stage.
I saw an older Spring forum discussion item, which has a recommendation for an approach of using a jndi lookup based properties file, which may suit your needs:
I believe you will have to do something like this . I haven't tested it but basically the setLocations method in PropertyPlaceholderConfigurer takes in an array of Resource(In our case UrlResource - http://static.springsource.org/spring/docs/2.0.x/api/org/springframework/core/io/UrlResource.html) which in turn has a constructor with the file path .
<jee:jndi-lookup id="mypropsfile1" jndi-name="myPropsFile1" default-value="file:///C:/defaultPath" resource-ref="true"/>
<jee:jndi-lookup id="mypropsfile2" jndi-name="myPropsFile2" resource-ref="true"/>
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" depends-on="mypropsfile1,mypropsfile2">
<property name="ignoreUnresolvablePlaceholders" value="true"/>
<property name="locations">
<list>
<bean class="org.springframework.core.io.UrlResource">
<constructor-arg><ref bean="mypropsfile1"/></constructor-arg>
</bean>
<bean class="org.springframework.core.io.UrlResource">
<constructor-arg><ref bean="myPropsFile2"/></constructor-arg>
</bean>
</list>
</property>
</bean>
I am not sure if there is a tag called in spring . Check this http://static.springsource.org/spring/docs/3.0.x/spring-framework-reference/html/beans.html#beans-introduction
I do this in Spring 3 using a map as follows:
<jee:jndi-lookup id="myJndiLookup" jndi-name="com.techtrip.spring.config.myJndiLookup"></jee:jndi-lookup>
<bean id="somethingWithMap" class="com.techtrip.foo.SomethingWithMap">
<property name="propMap">
<map>
<entry key="myJndiLookup" value-ref="myJndiLookup" />
</map>
</property>
</bean>
This works fine in most cases. You may run into trouble if you use AOP or something that wraps the bean in a Proxy class even if you set eager init correctly. A solution in that case is to directly access the somethingWithMap bean from the app context when needed using:
applicationContext.getBeansOfType(type, includeNonSingletons, allowEagerInit);
*Note that this will return a Map<String, T> where you can access the bean by name.
Not exactly for a single JNDI property, this is using a Properties reference instead, obtained through JNDI:
<!-- Lookup Properties reference through JNDI -->
<jee:jndi-lookup id="config-properties" jndi-name="resources/resource-name" resource-ref="true"/>
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" depends-on="config-properties">
<property name="ignoreUnresolvablePlaceholders" value="true"/>
<!-- Once the reference is obtained from JNDI, it can be used like any other reference -->
<property name="properties" ref="config-properties"></property>
</bean>
Is there a way to change the properties of a file? I'm trying to run selenium tests in parallel, with Spring and Jetty, so I'm trying to configure the url of the database, the port of the jettyserver and the port of the selenium server. So that I'm able to initialize two or more servers where the tests can run on.
My server.properties file contains this:
jdbc.url=jdbc:hsqldb:hsql://localhost/bibliothouris_scenario
jetty.port=8081
seleniumServer.port=4444
I can read those properties with a PropertyPlaceholderConfigurer, and I need the database URL, jettyport and seleniumserver port to be flexible.
I have declared them like this:
In my applicationContext.xml:
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location">
<value>classpath:server.properties</value>
</property>
</bean>
<bean id="dataSource" destroy-method="close" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="org.hsqldb.jdbcDriver" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="sa" />
<property name="password" value="" />
</bean>
In the serverContext.xml file:
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location">
<value>classpath:server.properties</value>
</property>
</bean>
<bean class="com.~companyName~.bibliothouris.jetty.JettyServer" init-method="start" destroy-method="stop">
<constructor-arg value="${jetty.port}" />
<constructor-arg ref="dataSource" />
</bean>
<bean class="org.openqa.selenium.server.SeleniumServer" init-method="start" destroy-method="stop">
<constructor-arg>
<bean class="org.openqa.selenium.server.RemoteControlConfiguration">
<property name="port" value="${seleniumServer.port}" />
<property name="singleWindow" value="true" />
<property name="timeoutInSeconds" value="10" />
</bean>
</constructor-arg>
</bean>
<bean class="com.thoughtworks.selenium.DefaultSelenium" init-method="start" destroy-method="stop" lazy-init="true">
<constructor-arg>
<bean class="com.thoughtworks.selenium.HttpCommandProcessor">
<constructor-arg value="localhost" />
<constructor-arg value="${seleniumServer.port}" />
<constructor-arg value="*firefox c:/~companyname~/firefox/firefox.exe" />
<constructor-arg value="http://localhost:${jetty.port}" />
</bean>
</constructor-arg>
</bean>
When I change the data in server.properties the selenium tests run on the right servers with the right ports, without failures.
So now I'm looking for a method to change the properties in the server.properties file.
Kind regards and thanks in advance
I solved this by having a flag in my build process (I'm using Maven) that chose which property file to include in the final war. This way you can include different artifacts (different property files) with different properties without having to mess with the low level property support of Spring.
If you do need to do this is Spring only, I would recommend going for a Java based configuration, where you can get and set the properties by in code not in XML.
Is there a way to change the
properties of a file?
No, but you could solve this in the following ways.
Split the properties into jdbc.properties (for applicationContext.xml) and test.properties (for serverContext.xml)
override server.properties via a src/test/resources resource
use system properties in addition to server.properties (use PropertyPlaceholderConfigurer.setSystemPropertiesMode for this)
Thanks for the help guys, without your info, I couldn't find my own solution. Here it is:
try {
Properties props = new Properties();
FileInputStream fileInputStream = new FileInputStream(
"C:\\~CompanyName~\\workspace\\bibliothouris\\infrastructure\\src\\main\\resources\\server.properties");
props.load(fileInputStream);
fileInputStream.close();
props.setProperty("seleniumServer.port", "4445");
FileOutputStream fileOutputStream = new FileOutputStream(
"C:\\~CompanyName~\\workspace\\bibliothouris\\infrastructure\\src\\main\\resources\\server.properties");
props.store(fileOutputStream, "");
fileOutputStream.close();
} catch (Exception e) {
e.printStackTrace();
}
I've wrote this piece of code in a testclass, now I have to create a method of it, which takes a few arguments (the URL, jettyport and seleniumport). And I have to change the path to a relative one.
Thanks for the help!