如何使用maven为Spring指定loadTimeWeaver
如何使用maven为Spring指定loadTimeWeaver
提问于 2019-03-15 04:54:13
我有一个奇怪的错误。我在intelliJIDEA IDE中运行了一个基本的spring boot web服务器（在jetty上）。
当我运行maven'package'命令，而不是尝试从命令行运行Web服务器时，它会给我一个loadTimeWeaver错误。我不明白两个运行环境之间的区别，在我看来它应该是可行的。
在IDEA中，我在运行配置中指定以下内容： 主类：package.Starter VM选项：-javaagent：C：/Users/newb/EXT_LIBS/spring-instrument-4.0.3.RELEASE.jar -noverify
在命令行上，我尝试执行以下操作： java -javaagent：C：/Users/newb/EXT_LIBS/spring-instrument-4.0.3.RELEASE.jar -noverify -jar target \ MySpringServer.war
但是我收到以下错误：
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:53)
at java.lang.Thread.run(Unknown Source)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [applicationContext.xml]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: Cannot apply class transformer without LoadTimeWeaver specified
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1553)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:973)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:750)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:120)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:648)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:311)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:909)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:898)
at au.net.iinet.operational.Starter.main(Starter.java:48)
... 6 more
Caused by: java.lang.IllegalStateException: Cannot apply class transformer without LoadTimeWeaver specified
at org.springframework.orm.jpa.persistenceunit.SpringPersistenceUnitInfo.addTransformer(SpringPersistenceUnitInfo.java:80)
at org.eclipse.persistence.jpa.PersistenceProvider.createContainerEntityManagerFactory(PersistenceProvider.java:348)
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:336)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1612)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1549)
... 21 more
解决此loadTimeWeaver问题的最佳方法是什么？有没有理由它可以在我的IDE中运行，但不是在它之外？我已经走下了试图强行设置loadTimeWeaver的兔子洞，但这不是一件容易的事，当然它在我的IDE中工作的事实意味着我只有一些非常小的东西需要检查。
提前致谢。
编辑： 我找到了答案！以下问题对我很有帮助：我在春天使用加载时间编织。如何在jetty中设置类加载器？ 基本上，我还需要在命令行中指定-Xbootclasspath / a：C：/Users/newb/EXT_LIBS/spring-instrument-4.0.3.RELEASE.jar。而现在它并没有给我那些加载时织入错误！
Stack Overflow用户
发布于 2019-03-15 14:00:00
这应该可以解决您的问题。
@Bean
public InstrumentationLoadTimeWeaver loadTimeWeaver() throws Throwable {
InstrumentationLoadTimeWeaver loadTimeWeaver = new InstrumentationLoadTimeWeaver();
return loadTimeWeaver;
}
在xml配置中也可以这样做。
找到一个新的库，只需解决动态设置spring InstrumentationLoadTimeWeaver就可以支持方面，而无需使用显式的java代理启动JVM
<dependency>
<groupId>de.invesdwin</groupId>
<artifactId>invesdwin-instrument</artifactId>
<version>1.0.2</version>
</dependency>
Spring启动配置
@SpringBootApplication
/**
* Make @Configurable work via @EnableLoadTimeWeaving.
* If it does not work, alternatively you can try:
* @ImportResource(locations = "classpath:/META-INF/ctx.spring.weaving.xml")
*/
@EnableLoadTimeWeaving
public class MySpringBootApplication {
public static void main(final String[] args) {
DynamicInstrumentationLoader.waitForInitialized(); //dynamically attach java agent to jvm if not already present
DynamicInstrumentationLoader.initLoadTimeWeavingContext(); //weave all classes before they are loaded as beans
SpringApplication.run(MySpringBootApplication.class, args); //start application, load some classes
}
}
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原文链接：
https://stackoverflow.com/questions/-100008977
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