DataNucleus，Maven，模式创建失败

【问题标题】：DataNucleus, Maven, schema-create failsDataNucleus，Maven，模式创建失败
【发布时间】：2015-02-22 14:14:04
【问题描述】：

我正在尝试使用 DataNucleus 和 MySQL 创建一个 maven 项目。但是，当我尝试构建和mvn datanucleus:schema-create 项目时，我失败了。我不知道为什么。

这是persistence.xml 类，它存在于构建项目的classes/META-INF 文件夹中：

<?xml version="1.0" encoding="UTF-8" ?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
        http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
    version="2.0">

    <!-- JDO tutorial "unit" -->
    <persistence-unit name="Tutorial">
        <class>hello.Counter</class>
        <exclude-unlisted-classes>true</exclude-unlisted-classes>
        <properties>
            <property name="javax.jdo.option.ConnectionURL" value="jdbc:mysql://localhost/glu" />
            <property name="javax.jdo.option.ConnectionDriverName"
                value="com.mysql.jdbc.Driver" />
            <property name="javax.jdo.option.ConnectionUserName" value="root" />
            <property name="javax.jdo.option.ConnectionPassword" value="root" />

            <property name="datanucleus.schema.autoCreateAll" value="true" />
            <property name="datanucleus.schema.validateTables" value="true" />
            <property name="datanucleus.schema.validateConstraints"
                value="true" />
            <property name="javax.jdo.PersistenceManagerFactoryClass"
                value="org.datanucleus.api.jdo.JDOPersistenceManagerFactory" />
        </properties>
    </persistence-unit>
</persistence>

这是我正在尝试使用的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>ru.sf0.one</groupId>
    <artifactId>two</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>glu</name>


    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.2.1.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>com.jayway.jsonpath</groupId>
            <artifactId>json-path</artifactId>
            <!-- <version>1.2.0</version> -->
        </dependency>


        <dependency>
            <groupId>javax.jdo</groupId>
            <artifactId>jdo-api</artifactId>
            <version>3.0.1</version>
        </dependency>
        <dependency>
            <groupId>org.datanucleus</groupId>
            <artifactId>datanucleus-core</artifactId>
            <!-- scope>runtime</scope -->
            <version>4.0.4</version>
        </dependency>
        <dependency>
            <groupId>org.datanucleus</groupId>
            <artifactId>datanucleus-api-jdo</artifactId>
            <version>4.0.4</version>
        </dependency>


        <dependency>
            <groupId>org.datanucleus</groupId>
            <artifactId>datanucleus-rdbms</artifactId>
            <scope>runtime</scope>
            <version>4.0.4</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>

        <dependency>
            <groupId>org.datanucleus</groupId>
            <artifactId>datanucleus-accessplatform-jdo-rdbms</artifactId>
            <version>4.0.4</version>
            <type>pom</type>
        </dependency>


    </dependencies>


    <build>

        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <!-- <version>3.2</version> -->
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                </configuration>
            </plugin>

            <plugin>
                <groupId>org.datanucleus</groupId>
                <artifactId>datanucleus-maven-plugin</artifactId>
                <version>4.0.0-release</version>


                <configuration>
                    <api>JDO</api>
                    <persistenceUnitName>Tutorial</persistenceUnitName>
                    <log4jConfiguration>${basedir}/src/main/resources/log4j.properties</log4jConfiguration>
                    <verbose>false</verbose>
                </configuration>
                <executions>
                    <execution>
                        <phase>process-classes</phase>
                        <goals>
                            <goal>enhance</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>


        </plugins>
    </build>

    <repositories>
        <repository>
            <id>spring-releases</id>
            <url>https://repo.spring.io/libs-release</url>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-releases</id>
            <url>https://repo.spring.io/libs-release</url>
        </pluginRepository>
    </pluginRepositories>
</project>

我得到的错误是：

~>2015-02-23 00:26:55 DEBUG MetaData:58 - Class "hello.Counter" field "count" : Adding Meta-Data for field since it didnt appear in the Meta-Data definition.
~>2015-02-23 00:26:55 DEBUG MetaData:58 - Initialising all MetaData ...
~>2015-02-23 00:26:55 DEBUG MetaData:58 - Class "hello.Counter" : Initialising Meta-Data
~>2015-02-23 00:26:55 DEBUG MetaData:58 - MetaData Management : Load of Metadata complete
~>2015-02-23 00:26:55 DEBUG Datastore:58 - Creating StoreManager for datastore
~>2015-02-23 00:26:55 ERROR Datastore:125 - Exception thrown creating StoreManager. See the nested exception
There is no available StoreManager of type "jdbc". Make sure that you have put the relevant DataNucleus store plugin in your CLASSPATH and if defining a connection via JNDI or DataSource you also need to provide persistence property "datanucleus.storeManagerType"
org.datanucleus.exceptions.NucleusUserException: There is no available StoreManager of type "jdbc". Make sure that you have put the relevant DataNucleus store plugin in your CLASSPATH and if defining a connection via JNDI or DataSource you also need to provide persistence property "datanucleus.storeManagerType"
    at org.datanucleus.NucleusContextHelper.createStoreManagerForProperties(NucleusContextHelper.java:223)
    at org.datanucleus.PersistenceNucleusContextImpl.initialise(PersistenceNucleusContextImpl.java:433)
    at org.datanucleus.store.schema.SchemaTool.getNucleusContextForMode(SchemaTool.java:693)
    at org.datanucleus.store.schema.SchemaTool.main(SchemaTool.java:286)
~>2015-02-23 00:26:55 ERROR SchemaTool:125 - Error creating NucleusContext
There is no available StoreManager of type "jdbc". Make sure that you have put the relevant DataNucleus store plugin in your CLASSPATH and if defining a connection via JNDI or DataSource you also need to provide persistence property "datanucleus.storeManagerType"
org.datanucleus.exceptions.NucleusUserException: There is no available StoreManager of type "jdbc". Make sure that you have put the relevant DataNucleus store plugin in your CLASSPATH and if defining a connection via JNDI or DataSource you also need to provide persistence property "datanucleus.storeManagerType"
    at org.datanucleus.NucleusContextHelper.createStoreManagerForProperties(NucleusContextHelper.java:223)
    at org.datanucleus.PersistenceNucleusContextImpl.initialise(PersistenceNucleusContextImpl.java:433)
    at org.datanucleus.store.schema.SchemaTool.getNucleusContextForMode(SchemaTool.java:693)
    at org.datanucleus.store.schema.SchemaTool.main(SchemaTool.java:286)
An error was encountered creating a PersistenceManagerFactory : There is no available StoreManager of type "jdbc". Make sure that you have put the relevant DataNucleus store plugin in your CLASSPATH and if defining a connection via JNDI or DataSource you also need to provide persistence property "datanucleus.storeManagerType" - please consult the log for more information.

UPD如果我从datanucleus-rdbms 中删除&lt;scope&gt;runtime&lt;/scope&gt; 限制，我会收到以下错误：

~>2015-02-23 12:07:34 DEBUG MetaData:58 - Class "hello.Counter" field "count" : Adding Meta-Data for field since it didnt appear in the Meta-Data definition.
~>2015-02-23 12:07:34 DEBUG MetaData:58 - Initialising all MetaData ...
~>2015-02-23 12:07:34 DEBUG MetaData:58 - Class "hello.Counter" : Initialising Meta-Data
~>2015-02-23 12:07:34 DEBUG MetaData:58 - MetaData Management : Load of Metadata complete
~>2015-02-23 12:07:34 DEBUG Datastore:58 - Creating StoreManager for datastore
~>2015-02-23 12:07:34 ERROR Datastore:125 - Exception thrown creating StoreManager. See the nested exception
Error creating transactional connection factory
org.datanucleus.exceptions.NucleusException: Error creating transactional connection factory
    at org.datanucleus.store.AbstractStoreManager.registerConnectionFactory(AbstractStoreManager.java:219)
    at org.datanucleus.store.AbstractStoreManager.<init>(AbstractStoreManager.java:163)
    at org.datanucleus.store.rdbms.RDBMSStoreManager.<init>(RDBMSStoreManager.java:288)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
    at org.datanucleus.plugin.NonManagedPluginRegistry.createExecutableExtension(NonManagedPluginRegistry.java:606)
    at org.datanucleus.plugin.PluginManager.createExecutableExtension(PluginManager.java:301)
    at org.datanucleus.NucleusContextHelper.createStoreManagerForProperties(NucleusContextHelper.java:193)
    at org.datanucleus.PersistenceNucleusContextImpl.initialise(PersistenceNucleusContextImpl.java:433)
    at org.datanucleus.store.schema.SchemaTool.getNucleusContextForMode(SchemaTool.java:693)
    at org.datanucleus.store.schema.SchemaTool.main(SchemaTool.java:286)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
    at org.datanucleus.plugin.NonManagedPluginRegistry.createExecutableExtension(NonManagedPluginRegistry.java:606)
    at org.datanucleus.plugin.PluginManager.createExecutableExtension(PluginManager.java:330)
    at org.datanucleus.store.AbstractStoreManager.registerConnectionFactory(AbstractStoreManager.java:205)
    ... 12 more
Caused by: java.lang.NullPointerException
    at org.datanucleus.store.rdbms.ConnectionFactoryImpl.initialiseDataSources(ConnectionFactoryImpl.java:110)
    at org.datanucleus.store.rdbms.ConnectionFactoryImpl.<init>(ConnectionFactoryImpl.java:82)
    ... 19 more
Nested Throwables StackTrace:
java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
    at org.datanucleus.plugin.NonManagedPluginRegistry.createExecutableExtension(NonManagedPluginRegistry.java:606)
    at org.datanucleus.plugin.PluginManager.createExecutableExtension(PluginManager.java:330)
    at org.datanucleus.store.AbstractStoreManager.registerConnectionFactory(AbstractStoreManager.java:205)
    at org.datanucleus.store.AbstractStoreManager.<init>(AbstractStoreManager.java:163)
    at org.datanucleus.store.rdbms.RDBMSStoreManager.<init>(RDBMSStoreManager.java:288)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
    at org.datanucleus.plugin.NonManagedPluginRegistry.createExecutableExtension(NonManagedPluginRegistry.java:606)
    at org.datanucleus.plugin.PluginManager.createExecutableExtension(PluginManager.java:301)
    at org.datanucleus.NucleusContextHelper.createStoreManagerForProperties(NucleusContextHelper.java:193)
    at org.datanucleus.PersistenceNucleusContextImpl.initialise(PersistenceNucleusContextImpl.java:433)
    at org.datanucleus.store.schema.SchemaTool.getNucleusContextForMode(SchemaTool.java:693)
    at org.datanucleus.store.schema.SchemaTool.main(SchemaTool.java:286)
Caused by: java.lang.NullPointerException
    at org.datanucleus.store.rdbms.ConnectionFactoryImpl.initialiseDataSources(ConnectionFactoryImpl.java:110)
    at org.datanucleus.store.rdbms.ConnectionFactoryImpl.<init>(ConnectionFactoryImpl.java:82)
    ... 19 more

【问题讨论】：

  • 为什么不在 DataNucleus 网站上运行本教程，因为这对我有用，只有您知道从中更改了什么。显然，persistence.xml 必须位于 CLASSPATH 根目录的 META-INF 中，如果不是，那么您就没有机会知道您的数据库在哪里
  • 文件夹是 META-INF，文中我这里称错了。另外，我在 pom 中添加了一些字段，现在很明显persistence.xml 已被读取和解析，但是模式创建步骤失败了。我怀疑这可能与我尝试从 spring-boot-starter-parent 继承的事实有关。
  • @NeilStockton 在您的帮助下，我现在似乎离目标只有几步之遥了。我现在得到«没有可用的“jdbc”类型的 StoreManager。»错误。我相应地更新了我的帖子。你能帮帮我吗？

标签： java maven datanucleus


【解决方案1】：

错误消息Make sure that you have put the relevant DataNucleus store plugin in your CLASSPATH 说明了您真正需要知道的一切。 datanucleus-rdbms 插件不在 CLASSPATH 中...您对runtime的范围限制

【讨论】：

  • 没有运行时限制，我得到另一个错误。我用它更新了问题。
  • 如果没有控制数据存储的插件，您将无法运行 SchemaTool。为什么你会收到我无法回答的其他错误，并建议你运行官方的 DataNucleus 教程，它工作得很好......所以很明显你已经改变了一些相对于它的东西
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