Neo4j服务器在Weblogic上使用Java Bolt neo4j-ogm

Question

从Java EE连接到neo4j服务器时出现问题。

我用：
- Neo4j的3.0.1在本地主机上
服务器模式 - 的Weblogic 12.1.3
- JEE 7
- 的Neo4j-OGM核心2.0.3
- 的Neo4j-OGM螺栓驱动器2.0.3

我的Maven依赖：

<dependency> 
    <groupId>org.neo4j</groupId> 
    <artifactId>neo4j-ogm-core</artifactId> 
    <version>2.0.3</version> 
</dependency> 
<dependency> 
    <groupId>org.neo4j</groupId> 
    <artifactId>neo4j-ogm-bolt-driver</artifactId> 
    <version>2.0.3</version> 
</dependency> 

我的资源ogm.properties/META-INF：

#Driver, required 
driver=org.neo4j.ogm.drivers.bolt.driver.BoltDriver 

#URI of the Neo4j database, required. If no port is specified, the default port 7687 is used. Otherwise, a port can be specified with bolt://neo4j:password@localhost:1234 
URI=bolt://neo4j:xxxxxx@localhost 

#Connection pool size (the maximum number of sessions per URL), optional, defaults to 50 
connection.pool.size=150 

#Encryption level (TLS), optional, defaults to REQUIRED. Valid values are NONE,REQUIRED 
encryption.level=NONE 

#Trust strategy, optional, not used if not specified. Valid values are TRUST_ON_FIRST_USE,TRUST_SIGNED_CERTIFICATES 
trust.strategy=TRUST_ON_FIRST_USE 

我使用EJB辛格尔顿定义会话工厂：

@Singleton 
public class Neo4jSessionFactory { 

    private SessionFactory sessionFactory; 

    @PostConstruct 
    public void init() { 
     sessionFactory = new SessionFactory("com.toto.poc.ejb.data.access"); 
    } 

    /** 
    * Get neo4j session 
    * @return the session 
    */ 
    public Session getNeo4jSession() { 
     return sessionFactory.openSession(); 
    } 
} 

它是在“COM .toto.poc.ejb.data.access“包。

我有一个EJB中要定义的业务方法调用：

@Stateless 
public class TopologyBusiness { 

    private @EJB Neo4jSessionFactory neo4jSessionFactory; 

    public Iterable<Map<String, Object>> getApplication(String irt) { 
     String query = "MATCH (a:Application) WHERE a.irt = '" + irt + "' RETURN a"; 

     Session session = neo4jSessionFactory.getNeo4jSession(); 

     return session.query(query, Collections.emptyMap()); 
    } 
} 

但是，当我的客户呼叫TopologyBusiness，Neo4jSessionFactory的Init（PostConstruct）方法被调用，并且发生一个错误：

com.oracle.pitchfork.interfaces.LifecycleCallbackException: Failure to invoke public void com.toto.poc.ejb.data.access.Neo4jSessionFactory.init() on bean class class com.toto.poc.ejb.data.access.Neo4jSessionFactory_wi88u8_Impl with args: null 
    at com.oracle.pitchfork.inject.Jsr250Metadata.invokeLifecycleMethod(Jsr250Metadata.java:379) 
    at com.oracle.pitchfork.inject.Jsr250Metadata.invokeLifecycleMethods(Jsr250Metadata.java:352) 
    at com.oracle.pitchfork.intercept.InterceptionMetadata.invokeLifecycleMethods(InterceptionMetadata.java:399) 
    at weblogic.ejb.container.injection.EjbComponentCreatorImpl.invokePostConstruct(EjbComponentCreatorImpl.java:55) 
    at weblogic.ejb.container.manager.SingletonSessionManager.constructAndInitBean(SingletonSessionManager.java:330) 
    Truncated. see log file for complete stacktrace 
Caused By: java.lang.reflect.InvocationTargetException 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:498) 
    at com.oracle.pitchfork.inject.Jsr250Metadata.invokeLifecycleMethod(Jsr250Metadata.java:377) 
    Truncated. see log file for complete stacktrace 
Caused By: java.lang.RuntimeException: org.neo4j.ogm.exception.ServiceNotFoundException: Resource: zip:C:/oracle/wls/12.1.3/user_projects/domains/CMDB/servers/LocalServer/tmp/_WL_user/poc-cdb-ear_ear/a8qjfi/poc-cdb-ejb-1.0-SNAPSHOT.jar!/com/toto.poc/ejb/data/access 
    at org.neo4j.ogm.ClassUtils.getUniqueClasspathElements(ClassUtils.java:178) 
    at org.neo4j.ogm.scanner.ClassPathScanner.getUniqueClasspathElements(ClassPathScanner.java:158) 
    at org.neo4j.ogm.scanner.ClassPathScanner.scan(ClassPathScanner.java:130) 
    at org.neo4j.ogm.metadata.DomainInfo.load(DomainInfo.java:316) 
    at org.neo4j.ogm.metadata.DomainInfo.<init>(DomainInfo.java:67) 
    Truncated. see log file for complete stacktrace 
Caused By: org.neo4j.ogm.exception.ServiceNotFoundException: Resource: zip:C:/oracle/wls/12.1.3/user_projects/domains/CMDB/servers/LocalServer/tmp/_WL_user/poc-cdb-ear_ear/a8qjfi/poc-cdb-ejb-1.0-SNAPSHOT.jar!/com/toto.poc/ejb/data/access 
    at org.neo4j.ogm.service.ResourceService.resolve(ResourceService.java:53) 
    at org.neo4j.ogm.ClassUtils.getUniqueClasspathElements(ClassUtils.java:175) 
    at org.neo4j.ogm.scanner.ClassPathScanner.getUniqueClasspathElements(ClassPathScanner.java:158) 
    at org.neo4j.ogm.scanner.ClassPathScanner.scan(ClassPathScanner.java:130) 
    at org.neo4j.ogm.metadata.DomainInfo.load(DomainInfo.java:316) 
    Truncated. see log file for complete stacktrace 

根本原因似乎是：

Caused By: org.neo4j.ogm.exception.ServiceNotFoundException: Resource: zip:C:/oracle/wls/12.1.3/user_projects/domains/CMDB/servers/LocalServer/tmp/_WL_user/poc-cdb-ear_ear/a8qjfi/poc-cdb-ejb-1.0-SNAPSHOT.jar!/com/toto.poc/ejb/data/access 

我不知道为什么要在类路径中查看一个zip文件...
感谢您的帮助！

Answer 1

我终于可以解决我的问题了，我浏览了一些奇怪的论坛，发现有人在JBoss上有类似的问题。
所以我设法将此解决方案转换为Weblogic。

首先，您需要创建自己的资源解析器以提供处理“zip”的方式。
覆盖ResourceResolver并实现类似下面的方法解决：

public class Neo4jResourceResolver implements ResourceResolver { 

    @Override 
    public File resolve(URL resource) throws Exception { 

     switch (resource.getProtocol()) { 
      case "file": 
       return new File(resource.toURI()); 
      case "jar": 
      case "zip": 
       String jarPath = resource.getPath().substring(0, resource.getPath().indexOf("!")); 
       return new File(jarPath); 
      default: 
       return null; 
     } 
    } 
} 

然后创建一个名为路径 “org.neo4j.ogm.classloader.ResourceResolver”“文件的src /主/资源/ META-INF /服务“。
该文件只包含一行，路径到您的自定义ResourceResolver类：

com.toto.poc.core.access.ucmdb.Neo4jResourceResolver 

而且它的魔力，它的工作原理！

Neo4j现在将探索jar存档，找到您的NodeEntities并将其映射到您的图:)