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HomeDatabaseMysql Tutorialunixodbc-使用Log4cxx日志输出至MySQL, 无法找到驱动错误

unixodbcmysqllog4cxx

Hi, guys!
用log4cxx日志框架对log内容输出至数据库(MySQL)一直未成功,不知道是什么步骤出现了问题。希望大伙们能帮帮忙,或者有什么更好的日志系统可以推荐,谢谢各位了。 ^_^


运行环境: Ubuntu 12.04 32bit + Eclipse CDT
log4cxx : apache-log4cxx-0.10.0
log4cxx支持两种ODBC选项(iODBC/unixODBC),这里选择了unixODBC形式进行管理
通过添加选项 ./configure --with-ODBC=unixODBC,编译通过.
之后对unixODBC的驱动和数据源进行配置,可以通过终端 isql log4cxx 成功建立连接
但是代码中使用Log4cxx进行输出的时候一直报下面的错误

<code>log4cxx: Failed to connect to database. - [unixODBC][Driver Manager]Data source name not found, and no default driver specified</code>

怀疑一:

Ecplise中是否没有加环境变量;
查阅ODBC资料,在Eclipse中加入ODBCSYSINI,ODBCINSTINI,ODBCINI变量后,还是没有效果.

怀疑二:

log4cxx配置写的不对;这个有没有什么官方的写法,晕呐!


配置内容:
/etc/odbcinst.ini

<code>[MySQL]Description = MySQLDriver = /usr/lib/i386-linux-gnu/odbc/libmyodbc.soSetup = /usr/lib/i386-linux-gnu/odbc/libodbcmyS.soFileUsage = 1  </code>

/etc/odbc.ini

<code>[log4cxx]Description = The Database for Logging SystemTrace = onTraceFile = stderrDriver = MySQLSERVER = localhostPORT = 3306DATABASE = logUSER = root PASSWORD = 56789</code>

log4cxx.xml

<code><appender name="OdbcMysqlAppender" class="org.apache.log4j.odbc.ODBCAppender">  <param name="URL" value="Driver={MySQL};Server=localhost;Database=log;User=root;Password=56789;">  <layout class="org.apache.log4j.PatternLayout">    <param name="ConversionPattern" value="INSERT INTO logs (message) VALUES ('%d - %c - %p - %m')">  </layout></appender><root>  <priority value="all"></priority>    <appender-ref ref="OdbcMysqlAppender"></appender-ref></root></code>

进展: _Time: 20150702_

查看Log4cxx源码,采用数据库方式记录Log,使用的是ODBCAppender src/main/cpp/odbcappender.cpp 作者原先的代码采用的是 SQLxxxW() 进行DriverConnect和SQLExecDirect操作,根据ODBC的描述,有 W 修饰是采用Unicode编码方式。总之我一直陷在这,一直报找不到数据源。于是乎我将 SQLxxxW() 修改成 SQLxxx() 方式的调用,同时将原先SQLWCHAR 修改成对应 SQLCHAR,即采用非宽字节的操作方式,成功的找到数据源,并且可以进行调用。
不过这就导致了中文的问题了.

疑惑
在odbcinst.ini中配置的Driver确实是libmyodbc5w.so,即驱动使用Unicode方式的呀! (*与之相对应的是libmyodbc5a.so*). 至今还不知道自己是哪里出错,作者不可能毫无依据的就采用 SQLxxxW() 形式进行ODBC连接的吧.


我在ODBCAppender.cpp中添加了
#define SQL_WCHART_CONVERT,否则make的时候过不去, 即

<code>#if !defined(LOG4CXX)#define LOG4CXX 1#endif#include <log4cxx>#if LOG4CXX_HAVE_ODBC#if defined(WIN32) || defined(_WIN32)#include <windows.h>#endif#define SQL_WCHART_CONVERT#include <sqlext.h>#endif</sqlext.h></windows.h></log4cxx></code>
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