我想知道如何使用Maven和Eclipselink 2.5生成静态元模型。通过在运行Eclipselink 2.4时将这些行添加到pom.xml中,它运行良好。
// Generate meta model for eclipselink 2.4 (does not work for 2.5)
<plugin>
<groupId>org.bsc.maven</groupId>
<artifactId>maven-processor-plugin</artifactId>
<version>1.3.1</version>
<executions>
<execution>
<id>process</id>
<goals>
<goal>process</goal>
</goals>
<phase>generate-sources</phase>
<configuration>
<compilerArguments>-Aeclipselink.persistencexml=src/main/resources/META-INF/persistence.xml</compilerArguments>
<processors>
<processor>org.eclipse.persistence.internal.jpa.modelgen.CanonicalModelProcessor</processor>
</processors>
<outputDirectory>${project.build.directory}/generated-sources/meta-model</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
但似乎自2.4以来出现了一些变化,因为我得到了以下错误:
[INFO] javac option: -proc:only
[INFO] javac option: -Aeclipselink.persistencexml=src/main/resources/META-INF/persistence.xml
[INFO] javac option: -processor
[INFO] javac option: org.eclipse.persistence.internal.jpa.modelgen.CanonicalModelProcessor
[INFO] javac option: -s
[INFO] javac option: /home/asdf/target/generated-sources/meta-model
[INFO] diagnostic error: Annotation processor 'org.eclipse.persistence.internal.jpa.modelgen.CanonicalModelProcessor' not found
[INFO] diagnostic warning: Annotation processing without compilation requested but no processors were found.
[ERROR] execute error
java.lang.Exception: error during compilation
at org.bsc.maven.plugin.processor.AbstractAnnotationProcessorMojo.executeWithExceptionsHandled(AbstractAnnotationProcessorMojo.java:183)
at org.bsc.maven.plugin.processor.AbstractAnnotationProcessorMojo.execute(AbstractAnnotationProcessorMojo.java:96)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
你们可以帮助我吗? =)
B.R
答案 0 :(得分:20)
看来他们已经将CanonicalModelProcessor
类移到了它自己的maven工件上:
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>org.eclipse.persistence.jpa.modelgen.processor</artifactId>
<version>2.5.0</version>
</dependency>
以下maven-processor-plugin配置适用于我:
<plugin>
<groupId>org.bsc.maven</groupId>
<artifactId>maven-processor-plugin</artifactId>
<version>2.2.4</version>
<executions>
<execution>
<id>eclipselink-jpa-metamodel</id>
<goals>
<goal>process</goal>
</goals>
<phase>generate-sources</phase>
<configuration>
<processors>
<processor>org.eclipse.persistence.internal.jpa.modelgen.CanonicalModelProcessor</processor>
</processors>
<outputDirectory>${project.build.directory}/generated-sources/meta-model</outputDirectory>
</configuration>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>org.eclipse.persistence.jpa.modelgen.processor</artifactId>
<version>2.5.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
</plugin>
非常重要的注意事项:只有在持久性单元中声明实体时才会生成元模型。它不适用于已发现的实体。
答案 1 :(得分:4)
为了简化配置,我建议您测试:https://github.com/ethlo/eclipselink-maven-plugin。您甚至不需要保留更新的persistence.xml
文件。
<plugin>
<groupId>com.ethlo.persistence.tools</groupId>
<artifactId>eclipselink-maven-plugin</artifactId>
<version>[version]</version>
<executions>
<execution>
<id>weave</id>
<phase>process-classes</phase>
<goals>
<goal>weave</goal>
</goals>
</execution>
<execution>
<id>modelgen</id>
<phase>generate-sources</phase>
<goals>
<goal>modelgen</goal>
</goals>
</execution>
</executions>
</plugin>
注意:我是该插件的作者。
答案 2 :(得分:0)
您可能会收到以下错误:
java.lang.RuntimeException: java.lang.SecurityException: class "org.eclipse.persistence.internal.jpa.modelgen.CanonicalModelProperties"'s signer information does not match signer information of other classes in the same package
由于未解决的错误compilation is broken, modelgen jar is signed in maven repository,版本现在必须设置为2.5.0-SNAPSHOT。
答案 3 :(得分:0)
2017更新:
这个问题的主要答案现在已经过时了。 您现在需要执行以下步骤才能使其正常工作。
1)导入所需的依赖项:
<!-- https://mvnrepository.com/artifact/org.eclipse.persistence/org.eclipse.persistence.jpa.modelgen.processor -->
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>org.eclipse.persistence.jpa.modelgen.processor</artifactId>
<version>2.5.2</version>
<scope>compile</scope>
</dependency>
2)指定persistence.xml位置(这是EL错误的解决方法。请注意,您的路径可能与此示例中指定的路径不同):
<build>
<pluginManagement>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.5.1</version>
<executions>
<execution>
<id>default-compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
[...]
</executions>
<configuration>
<source>1.7</source>
<target>1.7</target>
<compilerArgs>
<arg>-Aeclipselink.persistencexml=src/main/resources/META-INF/persistence.xml</arg>
</compilerArgs>
</configuration>
</plugins>
[...]
</pluginManagement>
[...]
</build>
3)最后请参考以下项目,以便使用Maven的新生命周期映射触发执行: Usage of maven Build Helper Maven Plugin
答案 4 :(得分:-1)
<强>更新强>
请参阅this blog entry。 和(或)this repository。我会不断更新条目和存储库。
如果需要修改,请以任何方式通知我。
最推荐使用Hibernate。
<plugin>
<groupId>org.bsc.maven</groupId>
<artifactId>maven-processor-plugin</artifactId>
<executions>
<execution>
<id>process</id>
<goals>
<goal>process</goal>
</goals>
<phase>generate-sources</phase>
<configuration>
<processors>
<processor>org.hibernate.jpamodelgen.JPAMetaModelEntityProcessor</processor>
</processors>
</configuration>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-jpamodelgen</artifactId>
<version>4.3.4.Final</version>
</dependency>
</dependencies>
</plugin>
OpenJPA似乎需要额外的元素<openjpa.metamodel>true<openjpa.metamodel>
。
<plugin>
<groupId>org.bsc.maven</groupId>
<artifactId>maven-processor-plugin</artifactId>
<executions>
<execution>
<id>process</id>
<goals>
<goal>process</goal>
</goals>
<phase>generate-sources</phase>
<configuration>
<processors>
<processor>org.apache.openjpa.persistence.meta.AnnotationProcessor6</processor>
</processors>
<optionMap>
<openjpa.metamodel>true</openjpa.metamodel>
</optionMap>
</configuration>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.apache.openjpa</groupId>
<artifactId>openjpa</artifactId>
<version>2.3.0</version>
</dependency>
</dependencies>
</plugin>
EclipseLink,正如@dschoorl所提到的,需要persistence.xml
并列出<class/>
。
<plugin>
<groupId>org.bsc.maven</groupId>
<artifactId>maven-processor-plugin</artifactId>
<executions>
<execution>
<id>process</id>
<goals>
<goal>process</goal>
</goals>
<phase>generate-sources</phase>
<configuration>
<processors>
<processor>org.eclipse.persistence.internal.jpa.modelgen.CanonicalModelProcessor</processor>
</processors>
</configuration>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>org.eclipse.persistence.jpa.modelgen.processor</artifactId>
<version>2.5.1</version>
</dependency>
</dependencies>
</plugin>
答案 5 :(得分:-1)
这是我用的
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>javax.persistence</artifactId>
<version>2.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>eclipselink</artifactId>
<version>2.5.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>org.eclipse.persistence.jpa.modelgen.processor</artifactId>
<version>2.5.1</version>
<scope>provided</scope>
</dependency>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
<compilerArguments>
<endorseddirs>${endorsed.dir}</endorseddirs>
</compilerArguments>
</configuration>
<executions>
<execution>
<id>generate-entity-metamodel</id>
<phase>generate-sources</phase>
<goals>
<goal>
compile
</goal>
</goals>
<configuration>
<source>1.6</source>
<target>1.6</target>
<optimize>true</optimize>
<showDeprecation>true</showDeprecation>
<showWarnings>true</showWarnings>
<proc>only</proc>
<!--<compilerArgument>-Aeclipselink.metamodel=true</compilerArgument>
<generatedSourcesDirectory>${basedir}/src/main/java</generatedSourcesDirectory>-->
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>build-helper-maven-plugin</artifactId>
<version>1.8</version>
<executions>
<execution>
<id>add-modelgen-generated-sources-directory</id>
<phase>generate-sources</phase>
<goals>
<goal>add-source</goal>
</goals>
<configuration>
<sources>
<source>${project.build.directory}/target/generated-sources/annotations</source>
</sources>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
add-sources部分用于netbeans 8以理解它将它放在classpath中 :)