How can I use environment variable in hibernate config file? - java

I am currently using database parameters in hibernate(Version 4.0.1) file through properties file.
I want to use some database parameters from environment variable. How can I fetch values from java files and set in to xml files before that loads in context.
<bean id="propertyConfigurer"
class="org.jasypt.spring31.properties.EncryptablePropertyPlaceholderConfigurer">
<constructor-arg ref="configurationEncryptor" />
<property name="locations">
<list>
<value>classpath:/test/demo/prop/DataParam.properties</value>
</list>
</property>
</bean>
<bean id="data" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass">
<value>${driverClass}</value>
</property>
<property name="jdbcUrl">
<value>${dbconnecturl}</value>
</property>
.
.
.
</beans>
I got some idea to make an object of Configuration class but I don't know where to write that code and how it would be implemented.

You need to use spring expression language to configure the properties from OS environemnt variables as shown below:
<bean id="propertyConfigurer"
class="org.jasypt.spring31.properties.EncryptablePropertyPlaceholderConfigurer">
<constructor-arg ref="configurationEncryptor" />
<property name="locations">
<list>
<value>classpath:/test/demo/prop/DataParam.properties</value>
</list>
</property>
</bean>
<bean id="data" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass">
<value>#{ systemProperties['driverClass']}</value>
</property>
<property name="jdbcUrl">
<value>#{ systemProperties['dbconnecturl']}</value>
</property>
.
.
.
</beans>

You can use as <property name="username" value="#{systemProperties['dbUsername']}"/> for instance.
The variable systemProperties is predefined, you can see Xml Based Configuration for more details.

Related

Spring batch to write multiple XML files using MultiResourceItemWriter

I am new to Spring batch and trying to write multiple XML files for each record that I am going to read from database table. Suppose if I read 10 records, I need to create 10 XML files. One for each record.
The name for each XML file should be unique. For that, I am planning to use "column_name1" value but I am not sure how to achieve that. If anyone can help me in this then that would be a great help.
Updated:
Added the #{formsPMVRowMapper.id} to resource property which can point to DefaultOutboundIFMRowMapper(Custom implementation of RowMapper) where I created a class level variable to set the row id. but still it's not working since it tries to call getter of ID even before getting into mapRow method which I think correct behviour but I am not sure how to get hold of that ID which I can use as resource name for my file in multiXmlFileItemWriter.
Could someone please let me know what could be the possibly correct way to do this?
Below is my Spring batch configuration file.
<util:properties id="batchProperties">
<prop key="batch.output.file">${outbound.pmv.filename}</prop>
</util:properties>
<bean id="itemReader" parent="pagingItemReader">
<property name="queryProvider" ref="outboundQueryProvider" />
<property name="rowMapper" ref="pmvRowMapper" />
</bean>
<bean id="pmvRowMapper"
class="tx.oag.cs.txcses.arch.batch.readers.DefaultOutboundIFMRowMapper">
<property name="idName" value="outbound_locate_record_staging_id" />
</bean>
<bean id="outboundQueryProvider" class="org.springframework.batch.item.database.support.SqlPagingQueryProviderFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="selectClause"
value="select column_name1" />
<property name="fromClause" value="from table_name" />
<property name="whereClause"
value="where column_name1='AAA' and column_name1='bbbb'" />
<property name="sortKey" value="column_name1" />
</bean>
<bean id="batchProcessor" parent="outboundStagingBatchProcessor">
<property name="entityClass"
value="Class_Name" />
</bean>
<bean id="itemWriter" parent="multiXmlFileItemWriter"/>
<bean id="multiXmlFileItemWriter"
class="org.springframework.batch.item.file.MultiResourceItemWriter">
<property name="resource" value="${outbound.ifm.outbound}/#{pmvRowMapper.id}">
</property>
<property name="delegate">
<bean class="org.springframework.batch.item.xml.StaxEventItemWriter">
<property name="marshaller">
<bean class="tx.oag.cs.txcses.arch.batch.utils.XMLStringMarshaller" />
</property>
</bean>
</property>
<property name="itemCountLimitPerResource" value="1" />
</bean>
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location"
value="classpath:config/env/#{#env}/batch-outbound.properties" />
<property name="properties" ref="batchProperties" />
<property name="localOverride" value="true" />
</bean>
I understand that above "resource" property can only write files with same name but I am not sure how to use "resource" property well in co-ordination with "resourceSuffixCreator" property.

Spring. How to add same property to multiple beans?

Consider I have something like this in beans.xml:
<bean id="emails" class="org.some.package.SomeClass">
<property name="emailList">
<list>
<value>pechorin#hero.org</value>
<value>raskolnikov#slums.org</value>
<value>stavrogin#gov.org</value>
<value>porfiry#gov.org</value>
</list>
</property>
</bean>
But I need to add emailList property into multiple beans. How can I do that without writing property to each bean? Can externalize property and inject it into each bean?
I expect something like:
<property name="commonProp">
<list>
<value>pechorin#hero.org</value>
<value>raskolnikov#slums.org</value>
<value>stavrogin#gov.org</value>
<value>porfiry#gov.org</value>
</list>
</property>
<bean id="emailsOne" class="org.some.package.ClassOne">
<property name="emailList" ref="commonProp" />
</bean>
<bean id="emailsTwo" class="org.some.package.ClassTwo">
<property name="emailList" ref="commonProp" />
</bean>
You can do it using: util:list
<util:list id="myList" value-type="java.lang.String">
<value>foo</value>
<value>bar</value>
</util:list>
Then use this myList reference in other beans.

Can't load multiple property files in spring's application context

I have three property files placed in a resource folder in classpath. The problem i am facing is while i am able to load invidual files separately i am unable to load them when they are declared together.
Please see the XML below:
<bean name="messageSource"
class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basenames" value="resources\label"/>
</bean>
This is working but the XML given below isn't:
<bean name="messageSource"
class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
<property name="basenames" value="resources\label,resources\button,resources\messages"/>
<property name="cacheSeconds" value="1"/>
</bean>
I wish to declared them together as I wish to use a single bean to access all three files. Help required!
Found the answer . It should be like this `
<property name="basenames">
<list>
<value>classpath:resources\label</value>
<value>classpath:resources\button</value>
<value>classpath:resources\messages</value>
</list>
</property>
</bean>
Do it like this
<property name="basenames">
<list>
<value>resources\label</value>
<value>resources\button</value>
<value>resources\messages</value>
</list>
</property>

Calling method in Bean property attribute

I have a simple bean tag in the bean xml file as shown below. This is just a dummy values
<bean id="myBeanId" class="myBeanClass">
<property name="myProperty" value=${myPassword} />
</bean>
<bean id ="myOtherBeanId" class="myOtherBeanClass">
<property name="myOtherProperty" ref="myBeanId">
</bean>
myPassword is a variable names stored in a separate properties file. Now, I instead of storing the direct value of myPassword from the properties file, I will have encrypted string in the property file and I want to call my custom written Decrypt method on myPassword property instead. something like this.
<bean id="myBeanId" class="myBeanClass">
<property name="myProperty" value=com.xxx.Security.Decrypt(${myPassword}) />
</bean>
How can I do this?
Use the MethodInvokingFactoryBean if you want to invoke another bean's method and use the returned object as a bean.
<bean id="securityBean" class="com.xxx.Security">
</bean>
<bean id="myBeanId" class="myBeanClass">
<property name="myProperty">
<bean class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
<property name="targetObject"><ref local="securityBean"/></property>
<property name="targetMethod"><value>Decrypt</value></property>
<property name="arguments">
<list>
<value>${myPassword}</value>
</list>
</property>
</bean>
</property>
</bean>
How about Using with jaspyt,
Properties file entry
password=ENC(G6N718UuyPE5bHyWKyuLQSm02auQPUtm)
Bean Entry
<bean id="myBeanId" class="myBeanClass">
<property name="myProperty" value=${password} />
</bean>
Source : http://www.jasypt.org/spring31.html

Concatenate string in spring xml configuration

I need to concatenate the string value of a spring bean, to an existing string, and then set it as an attribute of another bean:
<bean id="inet" class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
<property name="targetClass"><value>java.net.InetAddress</value></property>
<property name="targetMethod"><value>getLocalHost</value></property>
</bean>
<bean id="host" class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
<property name="targetObject"><ref local="inet"/></property>
<property name="targetMethod"><value>getHostName</value></property>
</bean>
At this point, I have the hostname, in the 'host' bean. I now need to concatenate it and pass it to the publishedEndpointUrl attribute. Something like this:
<jaxws:endpoint
id="foo"
publishedEndpointUrl= "http://" + host + "/Foo"
implementor="com.example.v1.foo"
address="/v1/Foo"/>
How is this done using spring xml configuration?
You could use Spring-EL and factory-method:
<bean id="localhost" class="java.net.InetAddress" factory-method="getLocalHost" />
<bean id="publishedUrl" class="java.lang.String">
<constructor-arg value="#{'http://' + localhost.hostName + '/Foo'}" />
</bean>
<jaxws:endpoint
...
publishedEndpointUrl="#publishedUrl"
...
EDIT:
The jaxws:endpoint tag appears to be able to reference bean values by using the #beanId notation but does not like Spring-EL. So by constructing a String bean, we get around this and it still looks fairly neat.
You need to look at PropertyPlaceholderConfigurer. This allows you define global properties, which can either come from a properties file, or in your case, you can define a default value, in which case it's just a global property. The following will work:
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="systemPropertiesModeName">
<value>SYSTEM_PROPERTIES_MODE_OVERRIDE</value>
</property>
<property name="properties">
<props>
<prop key="driver">jdbc.oracle.Driver</prop>
<prop key="dbname">fred</prop>
</props>
</property>
<property name="locations">
<list>
<value>file:properties/application.properties</value>
</list>
</property>
</bean>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName"><value>${driver}</value></property>
<property name="url"><value>jdbc:${dbname}</value></property>
</bean>
This means that you have default values for ${driver} and ${dbname}, which are used to define the data source. These values can be overridden in the application.properties file, or even as a -D option on the command line.
As jaxws:* namespace does not like Spring EL, an alternative could be to declare an EndpointImpl bean, instead of the jaxws:endpoint object.
It is some more work, but as pointed out in http://cxf.apache.org/docs/jax-ws-configuration.html, it is the actual implementation used by the namespace declaration.
You can mix propertyplaceholder vars and Spring EL:
<bean id="dataSource" class="xx.xxx.xxxxx.datasource.DataSourceWrapper" destroy-method="close">
<property name="dataSourceClassName" value="${db.dataSourceClassName}" />
<property name="username" value="${db.username}" />
<property name="password" value="${db.password}" />
<property name="maximumPoolSize" value="${db.maxConnections}" />
<property name="connectionTimeout" value="${db.connectionTimeout}" />
<property name="dataSourceProperties">
<props>
<prop key="databaseName">${db.databaseName}</prop>
<prop key="serverName">${db.serverName}#{':'}${db.port}</prop>
</props>
</property>
Look at ${db.serverName}#{':'}${db.port} concat.

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