在Glassfish 2.1.1上运行Liquibase 2.0.5的Spring 3.1.0 - 从一位已经离去的同事那里继承了这个以这种方式构造SpringLiquibase bean的applicationContext.xml：
<bean id="liquibaseConfiguratore" factory-method="createLiquibaseBean" class="com.whatever.LiquibaseFactory">
<constructor-arg name="dataSource" ref="dataSourceConfiguratore"/>
<constructor-arg name="changeLog" value="classpath:liquibase/configuratore-db-changelog.xml"/>
<constructor-arg name="propFileName" value="/opt/whatever/ec_properties.properties"/>
</bean>
其中LiquibaseFactory是一个工厂，静态方法 createLiquibaseBean 生成的bean具有类
com.whatever.CustomLiquibase extends liquibase.integration.spring.SpringLiquibase
现在我需要参数化changeLog值，以便我的bean声明变为：
<bean id="liquibaseConfiguratore" factory-method="createLiquibaseBean" class="com.whatever.LiquibaseFactory">
<constructor-arg name="dataSource" ref="dataSourceConfiguratore"/>
<constructor-arg name="changeLog" value="${tgo.liquibase.changelog.filename}"/>
<constructor-arg name="propFileName" value="/opt/whatever/ec_properties.properties"/>
</bean>
为了设置参数的正确值，我浏览了SpringLiquibase的源代码，我看到了String changeLog：
/**
* Sets a Spring Resource that is able to resolve to a file or classpath resource.
* An example might be <code>classpath:db-changelog.xml</code>.
*/
public void setChangeLog(String dataModel) { ... }
阅读完之后，我将原始字符串放在我的属性文件中。
tgo.liquibase.changelog.filename=classpath:liquibase/configuratore-db-changelog.xml
并将道具声明为：
<context:property-placeholder location="file:///opt/whatever/custom_properties.properties" />
但是bean在创建过程中失败了。错误信息是：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'liquibaseConfiguratore' defined in class path resource [spring/applicationContext.xml]: Invocation of init method failed; nested exception is liquibase.exception.LiquibaseException: Cannot find parser that supports classpath:liquibase/configuratore-db-changelog.xml
at
.....
Caused by: liquibase.exception.LiquibaseException: Cannot find parser that supports classpath:liquibase/configuratore-db-changelog.xml
at liquibase.parser.ChangeLogParserFactory.getParser(ChangeLogParserFactory.java:61)
at liquibase.Liquibase.update(Liquibase.java:107)
at liquibase.integration.spring.SpringLiquibase.performUpdate(SpringLiquibase.java:262)
显然，当XML中存在普通字符串时，会找到解析器。我放置占位符的那一刻，解析器就在那里找到了。但看起来占位符是正确解析的，至少在屏幕上......
我尝试了一些变化：
但问题仍然存在。
如何使用占位符指定changeLog参数？
这是完整的堆栈追踪：
[#|2014-06-25T09:19:54.860+0200|SEVERE|sun-appserver2.1|javax.enterprise.system.container.web|_ThreadID=12;_ThreadName=pool-1-thread-6;_RequestID=36e46602-c248-4e54-844e-6e5e11225bb8;|WebModule[/FastwebSme]PWC1275: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'liquibaseConfiguratore' defined in class path resource [spring/applicationContext.xml]: Invocation of init method failed; nested exception is liquibase.exception.LiquibaseException: Cannot find parser that supports classpath:liquibase/configuratore-db-changelog.xml
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1455)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:384)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4632)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:5312)
at com.sun.enterprise.web.WebModule.start(WebModule.java:353)
at com.sun.enterprise.web.LifecycleStarter.doRun(LifecycleStarter.java:58)
at com.sun.appserv.management.util.misc.RunnableBase.runSync(RunnableBase.java:304)
at com.sun.appserv.management.util.misc.RunnableBase.run(RunnableBase.java:341)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
Caused by: liquibase.exception.LiquibaseException: Cannot find parser that supports classpath:liquibase/configuratore-db-changelog.xml
at liquibase.parser.ChangeLogParserFactory.getParser(ChangeLogParserFactory.java:61)
at liquibase.Liquibase.update(Liquibase.java:107)
at liquibase.integration.spring.SpringLiquibase.performUpdate(SpringLiquibase.java:262)
at liquibase.integration.spring.SpringLiquibase.afterPropertiesSet(SpringLiquibase.java:245)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1514)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1452)
... 24 more
|#]
这里是LIQUIBASEFACTORY：
package com.whatever.util;
import javax.sql.DataSource;
import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;
public class LiquibaseFactory {
private static boolean enabled = !StringUtils.equals(
System.getProperty("liquibase.disable"), "true");
private static Logger log = Logger.getLogger(LiquibaseFactory.class);
public static CustomLiquibase createLiquibaseBean(DataSource dataSource,
String changeLog, String propFileName) {
log.info("dataSource is " + dataSource);
log.info("changeLog is " + changeLog);
log.info("propFileName is " + propFileName);
CustomLiquibase customLiquibase = null;
if (enabled) {
log.info("creating customLiquibase ENABLED");
customLiquibase = new CustomLiquibase(propFileName);
customLiquibase.setDataSource(dataSource);
customLiquibase.setChangeLog(changeLog);
} else {
log.warn("Liquibase has been disabled");
log.warn("\n\n" + StringUtils.repeat("*", 80));
log.warn(StringUtils.repeat("*", 80) + "\n\n");
}
return customLiquibase;
}
}
这里是CUSTOMLIQUIBASE：
package com.whatever.util;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import liquibase.integration.spring.SpringLiquibase;
import org.apache.log4j.Logger;
import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PropertiesLoaderUtils;
public class CustomLiquibase extends SpringLiquibase {
private static final Logger LOGGER = Logger
.getLogger(CustomLiquibase.class);
public CustomLiquibase(String propertiesName) {
super();
LOGGER.info("propertiesName is " + propertiesName);
Resource resource = new FileSystemResource(new File(propertiesName));
try {
LOGGER.info("resource is " + resource);
Properties props = PropertiesLoaderUtils.loadProperties(resource);
Map<String, String> ps = new HashMap<String, String>();
for (Object key : props.keySet()) {
Object value = props.get(key);
if (value != null) {
ps.put(key.toString(), value.toString());
}
}
this.setChangeLogParameters(ps);
} catch (IOException ex) {
LOGGER.error("", ex);
}
}
}