标签: spring-data-cassandra

如何忽略Spring Data Cassandra中的实体字段？使用javax.persistence.Transient注释？

我的Spring Data Cassandra配置如下所示:

@Configuration
@EnableCassandraRepositories(basePackages = {
        "mypackage.repository.cassandra",
})
public class DistributedRepositoryConfiguration  {

    // ...

    @Bean
    public CassandraSessionFactoryBean session() throws Exception {

      CassandraSessionFactoryBean session = new CassandraSessionFactoryBean();
      session.setCluster(cluster().getObject());
      session.setKeyspaceName(configuration.get().getKeyspace());
      session.setConverter(converter());
      session.setSchemaAction(SchemaAction.CREATE);

      return session;
    }

}

通常,Spring Data Cassandra在我的项目中工作.但是,当我启动我的应用程序时,我没有创建表.谁能告诉我我做错了什么？

我正在尝试使用spring-data-cassandra将cassandra与Spring引导集成.

Application.java

package hello;

import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.SpringApplication;
import org.springframework.context.annotation.ComponentScan;

@ComponentScan
@EnableAutoConfiguration
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    } 
}

CassandraConfiguration.java

package conf;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.cassandra.config.CassandraClusterFactoryBean;
import org.springframework.data.cassandra.config.java.AbstractCassandraConfiguration;
import org.springframework.data.cassandra.mapping.BasicCassandraMappingContext;
import org.springframework.data.cassandra.mapping.CassandraMappingContext;
import org.springframework.data.cassandra.repository.config.EnableCassandraRepositories;


@Configuration
@EnableCassandraRepositories("dao")
public class CassandraConfiguration extends AbstractCassandraConfiguration {

    @Bean
    @Override
    public CassandraClusterFactoryBean cluster() {
        CassandraClusterFactoryBean cluster = new CassandraClusterFactoryBean();
        cluster.setContactPoints("localhost");
        cluster.setPort(9042);
        return cluster;
    }

    @Override
    protected String getKeyspaceName() {
        return "mykeyspace";
    }

    @Bean
    @Override
    public CassandraMappingContext cassandraMapping() …

我有app1.war和app2.war部署在同一个tomcat jvm中.这两个应用程序都有自己的上下文xmls - app1.xml和app2.xml.这两个应用程序都包含连接到Cassandra的数据存储驱动程序依赖项.它们在单独部署时运行良好.但是当两者都部署在同一个jvm中时,我在日志中看到了以下JMX异常:

[DEBUG] [TokenId=] [2015-07-29 20:54:35.177] [DefaultListableBeanFactory] - [Eagerly caching bean 'cluster' to allow for resolving potential circular references]
[DEBUG] [TokenId=] [2015-07-29 20:54:35.191] [DefaultListableBeanFactory] - [Invoking afterPropertiesSet() on bean with name 'cluster']
[DEBUG] [TokenId=] [2015-07-29 20:54:35.199] [SystemProperties] - [com.datastax.driver.NEW_NODE_DELAY_SECONDS is undefined, using default value 1]
[DEBUG] [TokenId=] [2015-07-29 20:54:35.199] [SystemProperties] - [com.datastax.driver.NON_BLOCKING_EXECUTOR_SIZE is undefined, using default value 16]
[DEBUG] [TokenId=] [2015-07-29 20:54:35.205] [SystemProperties] - [com.datastax.driver.NOTIF_LOCK_TIMEOUT_SECONDS is undefined, using default value 60]
[WARN ] [TokenId=] [2015-07-29 20:54:35.217] [FrameCompressor] - …

有什么简单的方法可以通过xml配置打开cassandra上的查询日志？我正在使用命名空间：

xmlns:cassandra="http://www.springframework.org/schema/data/cassandra"

但我找不到任何合适的解决方案。我试图通过cqlsh打开跟踪，但是它对我的应用程序无效。

我也在尝试添加行：

<logger name="com.datastax.driver.core.QueryLogger.NORMAL" level="TRACE" />

但也不起作用。

我的版本：spring-data-cassandra-1.4.0 cassandra：2.1.5

我对此线程有一个类似的问题（尚未解决）。

我有一个Spring Boot 2 App，并有一个bootstrap.yml文件。有一个属性“ spring.data.cassandra.keyspace-name”没有被使用。我在src / main / resources下只有一个bootstrap.yml。

重要说明：如果将bootstrap.yml重命名为application.yml，则一切正常。

这看起来像一个真正的错误。有人可以确认他们也面临这个问题吗？还是我做错了什么？

bootstrap.yml的内容如下：

spring:
    profiles: default 
    # Pretty-print JSON responses
    jackson:
        serialization:
            indent-output: true
    data:
      cassandra:
        contact-points: localhost
        keyspace-name: samplekeyspace

我的pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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.sample.org</groupId>
<artifactId>sample-data</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>cart-data</name>
<description>Demo project for Spring Boot</description>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.5.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.10</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-cassandra-reactive</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId> …

如果我在 spring-data-cassandra 项目中根本没有设置任何读/写一致性级别，那么我的读取一致性级别是多少？写字呢？

（我在这里问了这个问题，但 Google 群组现在已锁定）

我使用 Spring 和 Cassandra 作为底层数据库。曾提到过 spring 伞项目 'spring data cassandra'。与休眠不同，无法找出此处如何管理事务。如果你们中的一些人已经合并了交易管理器，请分享交易管理器的详细信息。

我正在使用spring-data-cassandra.有没有一种方法或注释可以在我的实体java POJO中用于uuid或timeuuid类型的主键,以自动生成主键(id)的值？

我知道我可以使用id = UUIDs.timeBased();,但我希望自动化它.

当我尝试在大多数版本的Spring Boot(1.4)中使用Spring Data Cassandra时,我遇到了一个问题.

它似乎是一个maven依赖项问题,它不加载最新版本的Cassandra驱动程序.请问有什么解决方法可以解决这个问题吗？提前致谢![

编辑通过mp911de集成建议的解决方案后

]感谢您的回复,我按照您的建议设置了cassandra-driver,但我仍然有错误,这是完整的堆栈跟踪.

08:46:41.691| ERROR | Application startup failed                                                                                                                             | org.springxxamework.boot.SpringApplication.handleRunFailure(SpringApplication.java:827)
org.springxxamework.beans.factory.BeanCreationException: Error creating bean with name 'cassandraMapping' defined in class path resource [xx/xxx/xxx/cap/web/config/CasssandraConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springxxamework.beans.BeanInstantiationException: Failed to instantiate [org.springxxamework.data.cassandra.mapping.CassandraMappingContext]: Factory method 'cassandraMapping' threw exception; nested exception is java.lang.NoSuchMethodError: com.datastax.driver.core.DataType.asJavaClass()Ljava/lang/Class;
    at org.springxxamework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599)
    at org.springxxamework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1123)
    at org.springxxamework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1018)
    at org.springxxamework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510)
    at org.springxxamework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
    at org.springxxamework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
    at org.springxxamework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springxxamework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
    at org.springxxamework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
    at org.springxxamework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)
    at org.springxxamework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839)
    at org.springxxamework.context.support.AbstractApplicationContext.rexxesh(AbstractApplicationContext.java:538)
    at org.springxxamework.boot.context.embedded.EmbeddedWebApplicationContext.rexxesh(EmbeddedWebApplicationContext.java:118)
    at org.springxxamework.boot.SpringApplication.rexxesh(SpringApplication.java:766) …