[英]Define variables in gradle to fill data in persistence.xml
我可以在gradle中定義變量,這些變量在persistence.xml中占位符嗎?
例
gradle.properties:
dev.classes= <class>my.package.class</class>.....<class>my.package.class</class>
persistence.xml
<persistence>
<persistence-unit name "a">
<!--define a variable that will be overwritten by build.gradle-->
...
</persistence-unit>
</persistence>
build.gradle
task replaceTokens {
from(//persistence.xml path) {
filter(ReplaceTokens, tokens: [//variable in xml, //value in gradle.properties])
}
}
我需要它,因為我的persistence.xml中有更多的持久性單元,它們都需要相同的類。 當前,這些類在所有持久性單元中都是“硬編碼的”。 如果我只能定義一次,那就更好了。
當然可以,將//value in gradle.properties
的//value in gradle.properties
為project.'dev.classes'
,或者如果您的屬性不包含點,則dev_classes
也可以。
如果是我,我會將xml模板放在src/template/resources
src / template / resources / persistence.xml
<persistence>
<persistence-unit name="a">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jta-data-source>java:/A</jta-data-source>
@persistence.classes@
</persistence-unit>
<persistence-unit name="b">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jta-data-source>java:/B</jta-data-source>
@persistence.classes@
</persistence-unit>
</persistence>
gradle.properties
persistence.classes=\
<class>com.example.Foo</class>\
<class>com.example.Bar</class>\
...
build.gradle
apply plugin: 'java'
processResources {
from 'src/template/resources', {
filter(ReplaceTokens, tokens: ['persistence.classes': property('persistence.classes')])
}
}
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