Question

我正在将现有应用程序转换为spring引导，当我使用创建的jar运行应用程序时，我在扫描时发现异常并在我的实体jar中找到一个orm.xml（作为依赖项包含在内）。

org.eclipse.persistence.exceptions.PersistenceUnitLoadingException:
Exception Description: An exception was thrown while searching for persistence archives with ClassLoader: org.springframework.boot.loader.LaunchedURLClassLoader@38cdedfd
Internal Exception: javax.persistence.PersistenceException: Exception [EclipseLink-28018] (Eclipse Persistence Services - 2.5.1.v20130918-f2b9fc5): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Predeployment of PersistenceUnit [UAccessPersistenceUnit] failed.
Internal Exception: java.lang.RuntimeException: java.io.IOException: Unable to open root Jar file 'jar:file:everything-jar.jar'
        at org.eclipse.persistence.exceptions.PersistenceUnitLoadingException.exceptionSearchingForPersistenceResources(PersistenceUnitLoadingException.java:127)
                at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactoryImpl(PersistenceProvider.java:107)
                        at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:177)
                                at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79)


Caused by: javax.persistence.PersistenceException: Exception [EclipseLink-28018] (Eclipse Persistence Services - 2.5.1.v20130918-f2b9fc5): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Predeployment of PersistenceUnit [UAccessPersistenceUnit] failed.
Internal Exception: java.lang.RuntimeException: java.io.IOException: Unable to open root Jar file 'jar:file:everything-jar.jar'
        at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.createPredeployFailedPersistenceException(EntityManagerSetupImpl.java:1954)
                at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:1945)
                        at org.eclipse.persistence.internal.jpa.deployment.JPAInitializer.callPredeploy(JPAInitializer.java:98)
                                at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactoryImpl(PersistenceProvider.java:96)
                                        ... 46 common frames omitted
                                        Caused by: org.eclipse.persistence.exceptions.EntityManagerSetupException:
                                        Exception Description: Predeployment of PersistenceUnit [UAccessPersistenceUnit] failed.
                                        Internal Exception: java.lang.RuntimeException: java.io.IOException: Unable to open root Jar file 'jar:file:everything-jar.jar'
                                                at org.eclipse.persistence.exceptions.EntityManagerSetupException.predeployFailed(EntityManagerSetupException.java:230)
                                                        ... 50 common frames omitted

这不是使用spring数据，我现在正在从外部属性文件构建数据源。扫描似乎会导致问题。

这是使用eclipselink 2.5.1的春季启动1.1.5-RELEASE

everything-jar.jar是一个春季启动包装罐。使用我的编译类，弹簧启动加载程序和包装在jar中的实体。我已经标记了要解压缩的依赖性并且它有效，但它并不理想。

这个问题不断出现，现在如果我尝试从另一个jar加载persistence.xml，它会抛出同样的异常。

Answer 1

经过大量调查后，问题似乎有两个部分。

spring boot loader支持看起来像这样的url：罐子：文件：！/ /
Eclipselink为嵌入式orm.xml文件生成URL，如下所示罐子：罐子：文件：！/ /

我在弹簧启动时得到了一个修复，以便更好地打开eclipselink URL，但是为了立即修复，我们需要创建一个自定义ArchiveFactoryImpl并覆盖createArchive方法，以便在协议为时返回自定义JarInputStreamURLArchive广口瓶中。

在这个自定义类中，将get条目覆盖为URL，以检查具有以jar开头的jar协议的url，并从原始文件创建一个新URL（这会从原始URL中删除协议部分us jar：url而不是jar：url：url

public URL getEntryAsURL(String entryPath) throws IOException {
            URL entryUrl = super.getEntryAsURL(entryPath);

            if(entryUrl == null) {
                return null;
            }

            if("jar".equals(entryUrl.getProtocol()) && entryUrl.getFile().startsWith("jar:")) {
                //cut off the jar portions
                String file = entryUrl.getFile();
                return new URL(file);
            } else {
                return entryUrl;
            }
        }

Spring启动 - Eclipelink扫描orm.xml

1 个答案: