Comment utiliser java et neo4j pour travailler en utilisant le protocole bolt en eclipse?

Question

J'utilise les dépendances maven dans Eclipse et essaye de connecter neo4j et java en utilisant le protocole bolt. Je cours l'application dans MacOS. J'utilise Eclipse 3 et Java version 8 et jre 1.8. Ceci est mon 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>org.neo4j</groupId> 
    <artifactId>neo4j</artifactId> 
    <version>0.0.1-SNAPSHOT</version> 
    <packaging>jar</packaging> 
    <name>neo4j</name> 
    <url>http://maven.apache.org</url> 
    <properties> 
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 
    </properties> 
    <dependencies> 
    <dependency> 
     <groupId>org.neo4j.driver</groupId> 
     <artifactId>neo4j-java-driver</artifactId> 
     <version>1.2.1</version> 
    </dependency> 
    <dependency> 
     <groupId>junit</groupId> 
     <artifactId>junit</artifactId> 
     <version>3.8.1</version> 
     <scope>test</scope> 
    </dependency> 
    <dependency> 
     <groupId>org.neo4j</groupId> 
     <artifactId>neo4j</artifactId> 
     <version>3.1.4</version> 
     <scope>provided</scope> 
    </dependency> 
    </dependencies> 
</project> 

**

Cette méthode est appelée dans .java fichier

void createDatabase() 
    { 
     GraphDatabaseService dfs = new GraphDatabaseFactory().newEmbeddedDatabase(dbPath); 
     System.out.println("Database created!!"); 
     Config noSSL = Config.build().withEncryptionLevel(Config.EncryptionLevel.NONE).toConfig(); 

     try(Driver dri = GraphDatabase.driver("bolt://localhost:7687", AuthTokens.basic("neo4j", "hello"), noSSL)) 
     { 
      System.out.println("Database connected"); 

      Session session = dri.session(); 
      session.run("CREATE(a:Persona{name:{name}, title:{title}})", parameters("name","Aruna","title","Bhakt")); 
      System.out.println("\n\t1.CREATED"); 

      StatementResult result =session.run("MATCH(a:Persona) WHERE a.name = {name}" + 
                "RETURN a.name AS name, a.title AS title", 
                parameters("name","Aruna")); 
      System.out.println("\n\t2.Match"); 

      while(result.hasNext()) 
      { 
       Record record = result.next(); 
       System.out.println(record.get("title").asString() + " " + record.get("name").asString()); 

      } 
      System.out.println("\n\t3.Found Record"); 

      session.close(); 
      dri.close(); 
     } 
    } 

Après l'exécution de l'application, je reçois toutes ces erreurs

Exception in thread "main" java.lang.RuntimeException: Error starting org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory, /Users/arundhatiwahane/Documents/Neo4j/default.graphdb 
    at org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.initFacade(GraphDatabaseFacadeFactory.java:199) 
    at org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.newFacade(GraphDatabaseFacadeFactory.java:130) 
    at org.neo4j.graphdb.factory.GraphDatabaseFactory.newDatabase(GraphDatabaseFactory.java:101) 
    at org.neo4j.graphdb.factory.GraphDatabaseFactory.lambda$createDatabaseCreator$0(GraphDatabaseFactory.java:89) 
    at org.neo4j.graphdb.factory.GraphDatabaseFactory$$Lambda$1/1130478920.newDatabase(Unknown Source) 
    at org.neo4j.graphdb.factory.GraphDatabaseBuilder.newGraphDatabase(GraphDatabaseBuilder.java:183) 
    at org.neo4j.graphdb.factory.GraphDatabaseFactory.newEmbeddedDatabase(GraphDatabaseFactory.java:66) 
    at com.sampledb.createDatabase(sampledb.java:41) 
    at com.sampledb.main(sampledb.java:34) 
Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.kernel.internal.StoreLockerLifecycleAdapter@1b15e2a9' was successfully initialized, but failed to start. Please see attached cause exception. 
    at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:443) 
    at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:107) 
    at org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.initFacade(GraphDatabaseFacadeFactory.java:195) 
    ... 8 more 
Caused by: org.neo4j.kernel.StoreLockException: Store and its lock file has been locked by another process: /Users/arundhatiwahane/Documents/Neo4j/default.graphdb/store_lock. Please ensure no other process is using this database, and that the directory is writable (required even for read-only access) 
    at org.neo4j.kernel.internal.StoreLocker.storeLockException(StoreLocker.java:94) 
    at org.neo4j.kernel.internal.StoreLocker.checkLock(StoreLocker.java:80) 
    at org.neo4j.kernel.internal.StoreLockerLifecycleAdapter.start(StoreLockerLifecycleAdapter.java:40) 
    at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:433) 
    ... 10 more 

Aidez-moi à comprendre toutes mes erreurs.

Answer 1

Un autre processus de verrouillage, tuez-le

essayer

ps aux | grep neo4j 

ou

ps aux | grep java 

lire la description

Caused by: org.neo4j.kernel.StoreLockException: Store and its lock file has been locked by another process: /Users/arundhatiwahane/Documents/Neo4j/default.graphdb/store_lock. Please ensure no other process is using this database, and that the directory is writable (required even for read-only access) 

votre exception si tuant le processus n'a pas vous résoudre avoir besoin pour ajouter l'autorisation d'écriture au répertoire

chmod -R 777 /Users/arundhatiwahane/Documents/Neo4j/