我一直在使用 neo4j 嵌入式和 SpringData 开发我的项目。一切运行良好，并已使用嵌入式数据库进行了全面测试。我的印象是（http://docs.spring.io/spring-data/data-graph/docs/1.1.0.RC1/reference/multi/reference_neo4j-server.html）迁移到 REST API对应用程序上下文进行简单的更改（请参阅上面的链接）。但是，当我尝试使用 REST api 时，我得到一个带有“Not In Transaction”消息的 java IllegalStateException。使用嵌入式数据库时，我没有看到此错误。
我在嵌入式数据库中成功使用了 @Transactional 注释。唯一的代码更改是应用程序上下文中的“graphDatabaseService”bean，如上面的链接中所示。
通常如何解决此错误？我不得不认为它通常被击中。请在下面找到一个非常简单的问题重现。
这返回
例外
org.springframework.transaction.TransactionSystemException: Unexpected internal transaction state; nested exception is java.lang.IllegalStateException: Not in transaction
NeoTest.java
package com.mycompany.hellospringdata;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.neo4j.support.Neo4jTemplate;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.transaction.annotation.Transactional;
import static org.junit.Assert.*;
@ContextConfiguration(locations = "classpath:testContext.xml")
@RunWith(SpringJUnit4ClassRunner.class)
public class NeoTest {
@Autowired
Neo4jTemplate template;
@Test
@Transactional
public void testSomething() {
Person add = new Person();
add.setName("Jorgan Jorgansen");
add = template.save(add);
Person other = template.findOne(add.getId(), Person.class);
assertNotNull("Retrieved entity is non-null", other);
assertEquals("Retrieved entity equals saved entity", add, other);
}
}
人.java
package com.mycompany.hellospringdata;
import org.springframework.data.neo4j.annotation.GraphId;
import org.springframework.data.neo4j.annotation.NodeEntity;
@NodeEntity
public class Person {
@GraphId
private Long id;
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
@Override
public int hashCode() {
int hash = 7;
hash = 23 * hash + (this.name != null ? this.name.hashCode() : 0);
return hash;
}
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Person other = (Person) obj;
if ((this.name == null) ? (other.name != null) : !this.name.equals(other.name)) {
return false;
}
return true;
}
}
测试上下文.xml
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:neo4j="http://www.springframework.org/schema/data/neo4j"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/data/neo4j
http://www.springframework.org/schema/data/neo4j/spring-neo4j-2.0.xsd">
<context:annotation-config/>
<neo4j:config graphDatabaseService="graphDatabaseService"/>
<!--
<bean id="graphDatabaseService" class="org.neo4j.test.ImpermanentGraphDatabase" destroy-method="shutdown"/>
-->
<bean id="graphDatabaseService" class="org.neo4j.rest.graphdb.RestGraphDatabase">
<constructor-arg value="http://<neo4j-server-here>:7474/db/data"/>
</bean>
</beans>
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>com.mycompany.app</groupId>
<artifactId>helloSpringData</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>helloSpringData</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<repositories>
<repository>
<id>neotechnology-releases</id>
<url>http://m2.neo4j.org/content/repositories/releases/</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j</artifactId>
<version>1.9.3</version>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-kernel</artifactId>
<version>1.9.3</version>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-kernel</artifactId>
<version>1.9.3</version>
<type>test-jar</type>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-cypher</artifactId>
<version>1.9.3</version>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-rest-graphdb</artifactId>
<version>1.9</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-neo4j-rest</artifactId>
<version>2.2.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-neo4j</artifactId>
<version>2.2.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>3.2.3.RELEASE</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.6.6</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.6.6</version>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.0</version>
</dependency>
<dependency>
<groupId>org.ow2.asm</groupId>
<artifactId>asm-all</artifactId>
<version>4.1</version>
</dependency>
<dependency>
<groupId>org.apache.geronimo.specs</groupId>
<artifactId>geronimo-validation_1.0_spec</artifactId>
<version>1.1</version>
</dependency>
</dependencies>
</project>