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POChange hibernate.connection.url from within Spring
 

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    <p>I am using Hibernate in combination with Spring. As database I am currently using HSQL, which stores its data in a file (like SQLite). The path to the HSQL file is currently hard-coded in the persistence.xml. How can I access and change this value at runtime, so a user can load and save from/to an arbitrary HSQL file?</p> <p><strong>persistence.xml:</strong> </p> <pre><code>&lt;persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0"&gt; &lt;persistence-unit name="something-unit"&gt; &lt;provider&gt;org.hibernate.ejb.HibernatePersistence&lt;/provider&gt; &lt;properties&gt; &lt;property name="hibernate.connection.driver_class" value="org.hsqldb.jdbcDriver" /&gt; &lt;property name="hibernate.connection.url" value="jdbc:hsqldb:file:~/something-db/somethingdb" /&gt; &lt;property name="hibernate.connection.username" value="sa" /&gt; &lt;property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect" /&gt; &lt;property name="hibernate.hbm2ddl.auto" value="update" /&gt; &lt;/properties&gt; &lt;/persistence-unit&gt; &lt;/persistence&gt; </code></pre> <p>Spring <strong>applicationContext.xml</strong></p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:data="http://www.springframework.org/schema/data/jpa" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd"&gt; &lt;!-- Database Setup --&gt; &lt;bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean"&gt; &lt;property name="persistenceUnitName" value="something-unit" /&gt; &lt;/bean&gt; &lt;data:repositories base-package="com.something.playlist"/&gt; &lt;!-- Transaction Setup --&gt; &lt;tx:annotation-driven/&gt; &lt;bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"&gt; &lt;property name="entityManagerFactory" ref="entityManagerFactory"/&gt; &lt;/bean&gt; &lt;/beans&gt; </code></pre> <p>Thanks for any hint!</p>
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