来自Maven的Bean中的UnknownEntityTypeException

Question

我一直在尝试重构一个java项目,将子模块移动到部署到我们内部maven存储库(archiva)的单独项目中.

子模块中的类如下:

org.example.srv.DomainUser
org.example.srv.DomainUserBean //entity manager
org.example.srv.UserGroup
org.example.srv.UserGroupBean //entity manager

当源文件被复制到主后端服务器项目内的相应包文件夹中时,它工作正常,但是当我们从后端服务器项目中删除源文件并将相同的代码作为maven依赖项拉出时,我收到以下错误在尝试访问数据库时:

org.hibernate.UnknownEntityTypeException: Unable to locate persister: org.example.srv.DomainUser

后端服务器项目的持久性XML:

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="loginserver">
    <properties>
        <property name="javax.persistence.schema-generation.database.action" value="drop-and-create"/>
    </properties>
</persistence-unit>
</persistence>

我只能想象当项目是分开的时候它与bean发现有关,但我真的很困惑,用最小的配置开销来分离这些项目会很棒.

主服务器项目pom.xml:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>org.example.srv</groupId>
    <artifactId>loginserver</artifactId>
    <version>0.0.2-SNAPSHOT</version>
    <packaging>war</packaging>
    <dependencies>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>7.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>com.unboundid</groupId>
            <artifactId>unboundid-ldapsdk</artifactId>
            <version>3.2.0</version>
        </dependency>
        <dependency>
            <groupId>org.example</groupId>
            <artifactId>authobjects</artifactId>
            <version>1.0.0</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>loginserver</finalName>
    </build>
    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <failOnMissingWebXml>false</failOnMissingWebXml>
    </properties>
</project>

Auth Objects pom.xml(该项目还包含类的ORM代码,包括JPQL语句构建器等):

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <properties>
        <pj.gid>org.example</pj.gid>
        <pj.aid>authobjects</pj.aid>
        <pj.ver>1.0.2-SNAPSHOT</pj.ver>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <groupId>${pj.gid}</groupId>
    <artifactId>${pj.aid}</artifactId>
    <version>${pj.ver}</version>

    <dependencies>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>7.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>ent.tnp.utils</groupId>
            <artifactId>genericentityejb</artifactId>
            <version>1.0.0</version>
        </dependency>
    </dependencies>

    <build>
        <extensions>
            <extension>
                <groupId>org.apache.maven.wagon</groupId>
                <artifactId>wagon-webdav</artifactId>
                <version>1.0-beta-2</version>
            </extension>
        </extensions>
    </build>

    <distributionManagement>
        <repository>
            <id>internal</id>
            <url>http://archiva.tnp.in/repository/internal/</url>
        </repository>
        <snapshotRepository>
            <id>snapshots</id>
            <url>http://archiva.tnp.in/repository/snapshots/</url>
        </snapshotRepository>
    </distributionManagement>

    <repositories>
        <repository>
            <id>internal</id>
            <name>Archiva Managed Internal Repository</name>
            <url>http://archiva.tnp.in/repository/internal/</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>snapshots</id>
            <name>Archiva Managed Snapshot Repository</name>
            <url>http://archiva.tnp.in/repository/snapshots/</url>
            <releases>
                <enabled>false</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>internal</id>
            <name>Archiva Managed Internal Repository</name>
            <url>http://archiva.tnp.in/repository/internal/</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </pluginRepository>
        <pluginRepository>
            <id>snapshots</id>
            <name>Archiva Managed Snapshot Repository</name>
            <url>http://archiva.tnp.in/repository/snapshots/</url>
            <releases>
                <enabled>false</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>

</project>

澄清:genericentityejb是一个抽象类,旨在组成JPQL查询并管理JPA实体的数据库查询.authobjects项目为它包含的每个实体扩展一次,以便为每个实体提供持久性.

Answer 1

您可以添加包含实体类<jar-file>路径的元素，或使用元素描述所有实体类。jarpersistence.xml<class>

此外，您还可以使用某种包扫描方法以编程方式添加实体类。我在这里收集了这种方法的有用链接和库：

https://github.com/v-ladynev/hibernate-scanners-test