FUSEKI 的 MySQL 配置

Question

我需要针对使用 fuseki+mysql 作为三重存储的旧解决方案测试特定的数据库解决方案。基本上我需要做的就是对我之前使用 SPARQL 创建的数据库进行一些查询。问题是我似乎无法配置 fuseki 来给我这个数据库的端点。我用普通的标准 java 编码(不使用 Jena SDB 组件的 JDBC)创建了数据库。我使用的 mysql 版本是:

mysql  Ver 14.14 Distrib 5.5.37, for debian-linux-gnu (x86_64) using readline 6.3

基本上我有一个我无法解决的 ClassNotFoundException。这里是异常的详细信息:

    com.hp.hpl.jena.shared.JenaException: java.lang.ClassNotFoundException: net.rootdev.fusekisdbconnect.SDBConnect
    at com.hp.hpl.jena.assembler.AssemblerHelp.loadClassNamedBy(AssemblerHelp.java:145)
    at com.hp.hpl.jena.assembler.AssemblerHelp.loadArbitraryClass(AssemblerHelp.java:129)
    at com.hp.hpl.jena.assembler.AssemblerHelp.loadArbitraryClasses(AssemblerHelp.java:93)
    at com.hp.hpl.jena.assembler.assemblers.AssemblerGroup$ExpandingAssemblerGroup.loadClasses(AssemblerGroup.java:86)
    at com.hp.hpl.jena.assembler.assemblers.AssemblerGroup$ExpandingAssemblerGroup.open(AssemblerGroup.java:79)
    at com.hp.hpl.jena.assembler.assemblers.AssemblerBase.open(AssemblerBase.java:52)
    at com.hp.hpl.jena.assembler.assemblers.AssemblerBase.open(AssemblerBase.java:48)
    at org.apache.jena.fuseki.server.FusekiConfig.processService(FusekiConfig.java:241)
    at org.apache.jena.fuseki.server.FusekiConfig.configure(FusekiConfig.java:149)
    at org.apache.jena.fuseki.FusekiCmd.exec(FusekiCmd.java:364)
    at arq.cmdline.CmdMain.mainMethod(CmdMain.java:97)
    at arq.cmdline.CmdMain.mainRun(CmdMain.java:59)
    at arq.cmdline.CmdMain.mainRun(CmdMain.java:46)
    at org.apache.jena.fuseki.FusekiCmd.main(FusekiCmd.java:101)
Caused by: java.lang.ClassNotFoundException: net.rootdev.fusekisdbconnect.SDBConnect
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:190)
    at com.hp.hpl.jena.assembler.AssemblerHelp.loadClassNamedBy(AssemblerHelp.java:144)
    ... 13 more

fuseki 的调用将所需的库添加到类路径中(我将它们存储在 fuseki 主目录中的 lib 目录中):

java -cp lib/arq-2.8.8.jar:lib/arq-2.8.9-SNAPSHOT.jar:lib/jena-iri-0.9.0-incubating.jar:lib/mysql-connector-java-5.1.19.jar:lib/ReconnectingSDB-0.1-SNAPSHOT.jar:lib/sdb-1.3.4.jar -jar fuseki-server.jar --config=fuseki-mysql.ttl

我的配置文件:

    # Licensed under the terms of http://www.apache.org/licenses/LICENSE-2.0

@prefix :        <#> .
@prefix fuseki:  <http://jena.apache.org/fuseki#> .
@prefix rdf:     <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs:    <http://www.w3.org/2000/01/rdf-schema#> .
@prefix tdb:     <http://jena.hpl.hp.com/2008/tdb#> .
@prefix ja:      <http://jena.hpl.hp.com/2005/11/Assembler#> .
@prefix jumble:  <http://rootdev.net/vocab/jumble#> .
@prefix sdb:     <http://jena.hpl.hp.com/2007/sdb#> .

[] rdf:type fuseki:Server ;
   # Timeout - server-wide default: milliseconds.
   # Format 1: "1000" -- 1 second timeout
   # Format 2: "10000,60000" -- 10s timeout to first result, then 60s timeout to for rest of query.
   # See java doc for ARQ.queryTimeout
   ja:context [ ja:cxtName "arq:queryTimeout" ;  ja:cxtValue "10000,60000" ] ;

   fuseki:services (
     <#service_MySQL_read_only>
   ) .

# SDB
[] ja:loadClass "net.rootdev.fusekisdbconnect.SDBConnect" .
jumble:SDBConnect rdfs:subClassOf ja:RDFDataset .

<#service_MySQL_read_only> rdf:type fuseki:Service ;
    rdfs:label                      "UF MySQL Service (R)" ;
    fuseki:name                     "MySQL" ;
    fuseki:serviceQuery             "query" ;
    fuseki:serviceQuery             "sparql" ;
    fuseki:serviceUpdate            "update" ;
    fuseki:serviceUpload            "upload" ;
    fuseki:serviceReadWriteGraphStore      "data" ;
    # A separate read-only graph store endpoint:
    fuseki:serviceReadGraphStore       "get" ;
    fuseki:dataset           <#ufmysql_dataset_read> ;
    #fuseki:dataset           <#MySQLStore> ;
        .
<#ufmysql_dataset_read> rdf:type      sdb:DatasetStore ;
    sdb:store <#MySQLStore>
    .
<#MySQLStore> rdf:type jumble:SDBConnect;
    rdfs:label                  "UF MySQL SDB Store";
    sdb:layout                  "layout2";
    sdb:connection
    [ rdf:type sdb:SDBConnection;
        sdb:sdbHost "localhost";
        sdb:sdbType "MySQL";
        sdb:sdbName "EA_db_test";
        sdb:sdbUser "*****";
        sdb:sdbPassword "*****";
        sdb:driver "com.mysql.jdbc.Driver";
    ]
        .

如果我用 ja:loadClass "net.rootdev.fusekisdbconnect.SDBConnect"(我认为它有点旧)代替 ja:loadClass "com.hp.hpl.jena.sdb.SDB"我得到同样的异常，但有 SDB 类

com.hp.hpl.jena.shared.JenaException: java.lang.ClassNotFoundException: com.hp.hpl.jena.sdb.SDB

我在 fuseki 的 lib 文件夹中的 jar 列表是:

2247124 mag 12  2012 arq-2.8.8.jar
2259436 mag 12  2012 arq-2.8.9-SNAPSHOT.jar
154157 mag 12  2012 jena-iri-0.9.0-incubating.jar
801912 mag 12  2012 mysql-connector-java-5.1.19.jar
6657 mag 12  2012 ReconnectingSDB-0.1-SNAPSHOT.jar
529092 mag 12  2012 sdb-1.3.4.jar

我的 FUSEKI 版本:

Jena:       VERSION: 2.7.1-incubating-SNAPSHOT
Jena:       BUILD_DATE: 20120426-0201
ARQ:        VERSION: 2.9.1-incubating-SNAPSHOT
ARQ:        BUILD_DATE: 20120430-1956
TDB:        VERSION: 0.9.1-incubating-SNAPSHOT
TDB:        BUILD_DATE: 20120430-2052
Fuseki:     VERSION: 0.2.2-incubating-SNAPSHOT
Fuseki:     BUILD_DATE: 20120501-1232

我应该使用什么特定的 jar 版本组合？关于我在哪里可以找到丢失的 jar 的任何指针(如果缺少某些东西或者我需要不同的版本)。或者我只是配置文件有误，我应该使用不同的东西？

感谢帮助

Answer 1

1. 不要混用 Jena jar 的版本 - 使用来自单一发行版的一组 jar
2. -cp 和 -jar 不能一起工作 - 类路径设置将被忽略。

因为 (2) net.rootdev.fusekisdbconnect.SDBConnect 不是来自 jar。