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项目发布时Owning ClassInfo is null for property: private问题原因排查与解决 neo4j

问题现象

该问题的现象是，通过idea之类IDE开发平台运行和打包时一切正常，但打包jar后启动时提示警告：
main] o.s.d.n.mapping.Neo4jPersistentProperty : Owning ClassInfo is null for property: private…
工程接口被调用时出错，无法识别实体。

原因分析
根据警告分析，jar在启动时没有成功扫描到所有的Entity实体导致后面应用时出现问题。
由于maven工程在打包jar时会添加/BOOT-INF的目录结构导致扫描时结构与研发环境不同所致。

问题解决思路
代码排查
项目中使用的是neo4j-ogm-http-driver

<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-ogm-http-driver</artifactId>
</dependency>

 1 package com.xxxxx.neo.config;
 2 
 3 import org.apache.logging.log4j.util.Strings;
 4 import org.neo4j.ogm.config.ClasspathConfigurationSource;
 5 import org.neo4j.ogm.config.ConfigurationSource;
 6 import org.neo4j.ogm.session.SessionFactory;
 7 import org.springframework.beans.factory.annotation.Value;
 8 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 9 import org.springframework.boot.autoconfigure.domain.EntityScan;
10 import org.springframework.context.annotation.Bean;
11 import org.springframework.context.annotation.Configuration;
12 import org.springframework.data.neo4j.annotation.EnableNeo4jAuditing;
13 import org.springframework.data.neo4j.repository.config.EnableNeo4jRepositories;
14 import org.springframework.data.neo4j.transaction.Neo4jTransactionManager;
15 import org.springframework.transaction.annotation.EnableTransactionManagement;
16 @Configuration
17 @EnableNeo4jAuditing
18 @EnableNeo4jRepositories(basePackages = "com.xxxx.neo.repository")
19 @EnableTransactionManagement // 激活SDN隐式事务
20 public class Neo4jConfig {
21     @Value("${spring.data.neo4j.uri}")
22     private String uri;
23 
24     @Value("${spring.data.neo4j.username}")
25     private String username;
26 
27     @Value("${spring.data.neo4j.password}")
28     private String password;
29 
30     @Value("${spring.data.neo4j.connection.pool.size}")
31     private Integer connectionPoolSize;
32 
33 
34     @Bean
35     public SessionFactory sessionFactory() {
36         SessionFactory sessionFactory = new SessionFactory(configuration(), "com.xxxxx.neo.entity");
37         return sessionFactory;
38     }
39 
40     @Bean
41     public org.neo4j.ogm.config.Configuration configuration() {
42         return new org.neo4j.ogm.config.Configuration.Builder()
43                 .uri(uri)
44                 .credentials(username, password)
45                 .connectionPoolSize(connectionPoolSize)
46                 .autoIndex("update")
47                 .build();
48     }
49 
50     @Bean
51     public Neo4jTransactionManager transactionManager() {
52         return new Neo4jTransactionManager(sessionFactory());
53     }
54 
55 }
View Code

application.yml

 1 server:
 2   port: 8877
 3   servlet:
 4     context-path: /
 5 spring:
 6   data:
 7     neo4j:
 8       uri: bolt://127.0.0.1:7687
 9       username: neo4j
10       password: 1
11       auto-index: update
12       open-in-view: false
13       repositories:
14         enabled: true
15       embedded:
16         enabled: true
17       connection:
18         pool:
19           size: 100
View Code

由此看来是创建SessionFactory时指定packages没有被扫描到。最后跟踪到org.neo4j.ogm.metadata.DomainInfo:

 1     public static DomainInfo create(String... packages) {
 2         ScanResult scanResult = (new FastClasspathScanner(packages)).strictWhitelist().scan();
 3         List<String> allClasses = scanResult.getNamesOfAllClasses();
 4         DomainInfo domainInfo = new DomainInfo();
 5         allClasses.forEach((className) -> {
 6             prepareClass(domainInfo, className);
 7         });
 8         domainInfo.finish();
 9         return domainInfo;
10     }
View Code

FastClasspathScanner的问题；

解决办法：

节点和边的路径加入到配置文件

 1 @Configuration
 2 @EnableNeo4jRepositories(basePackages = "com.study.Repository")
 3 @EnableTransactionManagement // 激活SDN隐式事务
 4 public class Neo4jConfig {
 5 
 6     @Value("${spring.data.neo4j.uri}")
 7     private String databaseUrl;
 8 
 9     @Value("${spring.data.neo4j.username}")
10     private String userName;
11 
12     @Value("${spring.data.neo4j.password}")
13     private String password;
14 
15     @Bean
16     public SessionFactory sessionFactory() {
17         org.neo4j.ogm.config.Configuration configuration = new org.neo4j.ogm.config.Configuration.Builder()
18                 .uri(databaseUrl)
19                 .credentials(userName, password)
20                 .build();
21         return new SessionFactory(configuration, "com.study.node", "com.study.relation");
22     }
23 
24     @Bean
25     public Neo4jTransactionManager transactionManager() {
26         return new Neo4jTransactionManager(sessionFactory());
27     }
View Code

 

posted @ 2022-01-05 10:59  哦豁完蛋~  阅读(311)  评论(0)  编辑  收藏  举报