我不断收到消息
java.lang.NoSuchMethodError: org.apache.cassandra.thrift.TBinaryProtocol: method <init>(Lorg/apache/thrift/transport/TTransport;)V not found
at com.impetus.client.cassandra.schemamanager.CassandraSchemaManager.initiateClient(CassandraSchemaManager.java:446)
at com.impetus.kundera.configure.schema.api.AbstractSchemaManager.exportSchema(AbstractSchemaManager.java:101)
at com.impetus.client.cassandra.schemamanager.CassandraSchemaManager.exportSchema(CassandraSchemaManager.java:138)
at com.impetus.kundera.configure.SchemaConfiguration.configure(SchemaConfiguration.java:172)
at com.impetus.kundera.configure.ClientMetadataBuilder.buildClientFactoryMetadata(ClientMetadataBuilder.java:45)
at com.impetus.kundera.persistence.EntityManagerFactoryImpl.configureClientFactories(EntityManagerFactoryImpl.java:352)
at com.impetus.kundera.persistence.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:116)
at com.impetus.kundera.KunderaPersistence.createEntityManagerFactory(KunderaPersistence.java:83)
at com.impetus.kundera.KunderaPersistence.createContainerEntityManagerFactory(KunderaPersistence.java:65)
每当我尝试运行我的 Java Spring MVC 3.2 项目时。我正在尝试使用 Kundera 从 Spring WebApp 连接到我在我的机器上安装的 Apache Cassandra 1.2.8。我在项目的 pom.xml 文件中包含了以下依赖项：
- scale7-pelops(1.3-1.1.x)
- cassandra-all 和 cassandra-clientutil (1.2.8)
- 昆德拉核心和昆德拉卡桑德拉 (2.6)
我的 Spring 项目使用无 XML 配置 (Java Config) 和 JPA，而 kundera 的 persistence.xml 位于 {PROJECT}/src/main/resources/META-INF 下，以便在部署期间位于类路径的基础。我的 persistence.xml 看起来像：
<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">
<persistence-unit name="cassandra_pu">
<provider>com.impetus.kundera.KunderaPersistence</provider>
<class>org.tutiworks.orm.Role</class>
<class>org.tutiworks.orm.User</class>
<properties>
<property name="kundera.nodes" value="localhost"/>
<property name="kundera.port" value="9160"/>
<property name="kundera.keyspace" value="afrikana"/>
<property name="kundera.dialect" value="cassandra"/>
<property name="kundera.ddl.auto.prepare" value="update"/>
<property name="kundera.client.lookup.class" value="com.impetus.client.cassandra.pelops.PelopsClientFactory" />
<property name="kundera.cache.provider.class" value="com.impetus.kundera.cache.ehcache.EhCacheProvider"/>
<property name="kundera.cache.config.resource" value="/ehcache-cassandra.xml"/>
</properties>
</persistence-unit>
</persistence>
创建 entityManager 的配置类如下所示：
@Configuration
public class SpringDataConfig extends WebMvcConfigurerAdapter{
@Autowired
private Environment env;
@Value("${kundera.nodes}") private String node;
@Value("${kundera.port}") private String port;
@Value("${kundera.keyspace}") private String keyspace;
@Value("${kundera.dialect}") private String dialect;
@Value("${kundera.ddl.auto.prepare}") private String dbGenerator;
@Value("${kundera.cache.provider.class}") private String cacheClass;
@Value("${kundera.client.lookup.class}") private String lookupClass;
@Value("${kundera.cache.config.resource}") private String configResource;
@Value("${persistence.unit.name}") private String persistenceUnitName;
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
em.setPersistenceUnitName(persistenceUnitName);
return em;
}
@Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
return new PersistenceExceptionTranslationPostProcessor();
}
}
下面的类展示了如何使用持久化上下文。
public abstract class GenericDAO< T extends Serializable > {
private Class<T> clazz;
@PersistenceContext
EntityManager entityManager;
protected void setClazz( Class<T> clazzToSet ){
this.clazz = clazzToSet;
}
public T findOne( String id ){
return this.entityManager.find( this.clazz, id );
}
@SuppressWarnings("unchecked")
public List< T > findAll(){
return this.entityManager.createQuery( "from " + this.clazz.getName() )
.getResultList();
}
public void save( T entity ){
this.entityManager.persist( entity );
}
public void update( T entity ){
this.entityManager.merge( entity );
}
public void delete( T entity ){
this.entityManager.remove( entity );
}
public void deleteById( String entityId ){
T entity = this.findOne( entityId );
this.delete( entity );
}
}
在 Apache Cassandra 安装中映射到列族的 ORM 示例如下所示。
@XmlRootElement(name = "Role")
@Entity(name="Role")
@Table(name = "roles", schema = "afrikana@cassandra_pu")
public class Role implements Serializable {
private static final long serialVersionUID = 9127322651789683331L;
@Id
@Column(name="id")
@XmlID
private String id;
@Column(name = "role_name")
@XmlElement(name = "role_name")
private String roleName;
public String getRoleName() {
return roleName;
}
public void setRoleName(String roleName) {
this.roleName = roleName;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
}
我的配置哪里出错了？我错过了什么？如何修复错误？