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==== サンプル13 testPropertyConfig.cpp ====
　[Properties log4cppの設定ファイル]を使用し、ログ出力を行うサンプルです。

===== 関連ファイル =====
 * testPropertyConfig.cpp
 * testConfig.log4cpp.properties

===== ファイルの中身 =====
testPropertyConfig.cpp[[BR]]
{{{ code cpp
// testConfig.cpp : Derived from testPattern.cpp.
//

#include <log4cpp/Portability.hh>

#ifdef WIN32
#include <windows.h>
#endif
#ifdef LOG4CPP_HAVE_UNISTD_H
#include <unistd.h>
#endif

#include <cstdlib>

#include <log4cpp/Category.hh>
#include <log4cpp/Appender.hh>
#include <log4cpp/OstreamAppender.hh>
#include <log4cpp/FileAppender.hh>
#include <log4cpp/Layout.hh>
#include <log4cpp/BasicLayout.hh>
#include <log4cpp/Priority.hh>
#include <log4cpp/NDC.hh>
#include <log4cpp/PatternLayout.hh>

#include <log4cpp/PropertyConfigurator.hh>

double calcPi()
{
    double denominator = 3.0;
    double retVal = 4.0;
    long i;
    for (i = 0; i < 50000000l; i++)
    {
        retVal = retVal - (4.0 / denominator);
        denominator += 2.0;
        retVal = retVal + (4.0 /denominator);
        denominator += 2.0;
    }
    return retVal;
}

int main(int argc, char* argv[])
{
    try {
        /* looking for the init file in $srcdir is a requirement of
           automake's distcheck target.
        */
        char* srcdir = std::getenv("srcdir");
        std::string initFileName;
        if (srcdir == NULL) {
            initFileName = "./testConfig.log4cpp.properties";
        }
        else {
            initFileName = std::string(srcdir) + "/testConfig.log4cpp.properties";
        }
        log4cpp::PropertyConfigurator::configure(initFileName);
    } catch(log4cpp::ConfigureFailure& f) {
        std::cout << "Configure Problem " << f.what() << std::endl;
        return -1;
    }

    log4cpp::Category& root = log4cpp::Category::getRoot();

    log4cpp::Category& sub1 = 
        log4cpp::Category::getInstance(std::string("sub1"));

    log4cpp::Category& sub2 = 
        log4cpp::Category::getInstance(std::string("sub1.sub2"));

    root.error("root error");
    root.warn("root warn");
    sub1.error("sub1 error");
    sub1.warn("sub1 warn");

    calcPi();

    sub2.error("sub2 error");
    sub2.warn("sub2 warn");

    root.error("root error");
    root.warn("root warn");
    sub1.error("sub1 error");
    sub1.warn("sub1 warn");

#ifdef WIN32
    Sleep(3000);
#else
    sleep(3);
#endif

    sub2.error("sub2 error");
    sub2.warn("sub2 warn");
    sub2.error("%s %s %d", "test", "vform", 123);
    sub2.warnStream() << "streamed warn";

    sub2 << log4cpp::Priority::WARN << "warn2.." << "..warn3..value=" << 0 
         << log4cpp::eol << "..warn4";

    log4cpp::Category::shutdown();

    return 0;
}
}}}


testConfig.log4cpp.properties[[BR]]
{{{
# a simple test config

log4j.rootCategory=DEBUG, rootAppender
log4j.category.sub1=,A1
log4j.category.sub2=INFO
log4j.category.sub1.sub2=ERROR, A2

log4j.additivity.sub1.sub2=false

log4j.appender.rootAppender=org.apache.log4j.ConsoleAppender
log4j.appender.rootAppender.layout=org.apache.log4j.BasicLayout

log4j.appender.A1=org.apache.log4j.FileAppender
log4j.appender.A1.fileName=A1.log
log4j.appender.A1.layout=org.apache.log4j.SimpleLayout

log4j.appender.A2=org.apache.log4j.ConsoleAppender
log4j.appender.A2.layout=org.apache.log4j.PatternLayout
log4j.appender.A2.layout.ConversionPattern=The message '%m' at time %d%n

}}}


===== 実行結果例 =====
　testPropertyConfig.cppをビルドし、実行した結果です。実行環境はLinux(Ubuntu 11.0)です。 

stdout(標準出力):
{{{
1336871833 ERROR  : root error
1336871833 WARN  : root warn
1336871833 ERROR sub1 : sub1 error
1336871833 WARN sub1 : sub1 warn
The message 'sub2 error' at time 2012-05-13 10:17:14,894
1336871834 ERROR  : root error
1336871834 WARN  : root warn
1336871834 ERROR sub1 : sub1 error
1336871834 WARN sub1 : sub1 warn
The message 'sub2 error' at time 2012-05-13 10:17:17,897
The message 'test vform 123' at time 2012-05-13 10:17:17,897
}}}

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