Question

我正在尝试几个概念证明来测试时间序列数据。我从spring网站上取样并在eclipse上配置它。

以下是一些细节：

Cassandra Version ** - 3.0.9 Spring数据cassandra版本 - 1.0.0.RELEASE DataStax java驱动程序core-cassandra-driver-core-3.1.2

我正在执行以下代码：

Cluster cluster = Cluster.builder().addContactPoints("127.0.0.1").withPort(9042).build();
          Session session = cluster.connect("axiaglobal");
       CassandraOperations cassandraOps = new CassandraTemplate(session);

       cassandraOps.insert(new Person("1234567890", "David", 40));

和Person.java如下：

@Table
public class Person {
 @PrimaryKey
 private String id;

 private String name;
 private int age;

 public Person(String id, String name, int age) {
  this.id = id;
  this.name = name;
  this.age = age;
 }

 public String getId() {
  return id;
 }

 public String getName() {
  return name;
 }

 public int getAge() {
  return age;
 }

 @Override
 public String toString() {
  return "Person [id=" + id + ", name=" + name + ", age=" + age + "]";
 }

}

在执行代码时，我得到以下异常：

Exception in thread "main" java.lang.NoSuchMethodError: com.datastax.driver.core.DataType.asJavaClass()Ljava/lang/Class;
    at org.springframework.data.cassandra.mapping.CassandraSimpleTypeHolder.<clinit>(CassandraSimpleTypeHolder.java:62)
    at org.springframework.data.cassandra.mapping.BasicCassandraMappingContext.<init>(BasicCassandraMappingContext.java:73)
    at org.springframework.data.cassandra.convert.MappingCassandraConverter.<init>(MappingCassandraConverter.java:77)
    at org.springframework.data.cassandra.core.CassandraTemplate.<init>(CassandraTemplate.java:75)
    at com.axia.global.dao.cassandra.service.CassandraApp.main(CassandraApp.java:26)

有人可以帮我解决一些建议或指示吗？

Answer 1

更改pom文件如下解决了我的问题：

<dependency>
        <groupId>org.cassandraunit</groupId>
        <artifactId>cassandra-unit-spring</artifactId>
        <version>3.1.1.0</version>
        <scope>test</scope>
        <exclusions>
            <exclusion>
                <groupId>org.cassandraunit</groupId>
                <artifactId>cassandra-unit</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.cassandraunit</groupId>
        <artifactId>cassandra-unit</artifactId>
        <classifier>shaded</classifier>
        <version>3.1.1.0</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>com.datastax.cassandra</groupId>
        <artifactId>cassandra-driver-core</artifactId>
        <version>3.1.1</version>
        <optional>true</optional>
        <!--<exclusions>-->
        <!--<exclusion>-->
        <!--<groupId>com.google.guava</groupId>-->
        <!--<artifactId>guava</artifactId>-->
        <!--</exclusion>-->
        <!--</exclusions>-->
    </dependency>

面对Cassandra概念证明：Exception - com.datastax.driver.core.DataType.asJavaClass（）Ljava / lang / Class;

1 个答案: