无法使用 CassandraConfiguration 连接到 cassandra

Question

我已经按照 CassandraOperations 将记录插入到 cassandra 中。因为我需要为一行插入 TTL 值，所以我选择了这种方式。CrudRespository 不能有存储 TTL 值的功能。

下面是 Cassandra 配置类

@Override

@Bean

public CassandraClusterFactoryBean cluster() {

    final CassandraClusterFactoryBean cluster = new CassandraClusterFactoryBean();

    cluster.setContactPoints(cassandra_contactPoints);

    cluster.setPort(Integer.parseInt(cassandra_port));

    cluster.setUsername(cassandra_username);

    cluster.setPassword(cassandra_password);

    LOGGER.info("Cluster created with contact points [" + cassandra_port + "] " + "& port ["

            + Integer.parseInt(cassandra_port) + "].");

    return cluster;

}

@Override

@Bean

public CassandraMappingContext cassandraMapping() throws ClassNotFoundException {

    return new BasicCassandraMappingContext();

}

@Override

protected String getKeyspaceName() {

    return cassandra_keyspaceName;

}

当我启动应用程序时，它抛出以下异常

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.cassandra.core.CassandraAdminTemplate]: Factory method 'cassandraTemplate' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [com/sample/session/config/CassandraConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.cassandra.SessionFactory]: Factory method 'sessionFactory' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'session' defined in class path resource [com/sample/session/config/CassandraConfig.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: com/codahale/metrics/JmxReporter 

Answer 1

这记录在Java 驱动程序的文档中——您需要创建一个没有 JMX 指标报告的集群对象——这是通过添加.withoutJMXReporting()对集群构建器的调用或添加 Maven 依赖项来完成的：<dependency>&nbsp; <groupId>io.dropwizard.metrics</groupId>&nbsp; <artifactId>metrics-jmx</artifactId>&nbsp; <version>4.0.2</version></dependency>