I am using fluent NHibernate. I want to see sql query which is generated by fluent NHibernate. Is there any way to get this query at runtime.
Generated SQL could be observed in two ways. We can use log4net and output it into any kind of appender (e.g. file) like this:
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="c:\Logs\NH_SQL.log" />
<layout type="log4net.Layout.PatternLayout">
<ConversionPattern value="[%-3d|%-4t|%-5p|%-75c] %m | %-10u %n" />
</layout>
<!-- example with file up to 1MB migrated into max 2 backup files -->
<appendToFile value="true" />
<maximumFileSize value="1MB" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="2" />
</appender>
<logger name="NHibernate.SQL">
<level value="ALL" />
<appender-ref ref="RollingFileAppender" />
</logger>
Or we can use the setting show_sql documented here
3.5. Optional configuration properties
Which could be turned on like this:
Fluently
.Configure()
.Database( MsSqlConfiguration
.MsSql2008
.ShowSql()
...
And then all SQL statements will be written into console.
Related
I have programmatically create log4net log from config file:
var properties = new NameValueCollection
{
{"configType", "FILE"},
{"configFile", #"c:/log4net.config"}
};
Common.Logging.LogManager.Adapter = new Common.Logging.Log4Net.Log4NetLoggerFactoryAdapter(properties);
This is my log4net.config (EDITED for simplicity as dove suggested) :
<log4net>
<appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
<file value="c:/log.log" />
<appendToFile value="true" />
<maximumFileSize value="100KB" />
<maxSizeRollBackups value="5" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%d [%t] %-5p %c - %m%n" />
</layout>
</appender>
<root>
<level value="All" />
<appender-ref ref="RollingFile" />
</root>
<logger name="NHibernate">
<level value="All" />
<appender-ref ref="RollingFile" />
</logger>
</log4net>
I got Spring.NET successfuly logging into that file, but not NHibernate.
Nhibernate is configured fluenltly:
protected override void PostProcessConfiguration(Configuration config)
{
base.PostProcessConfiguration(config);
var msSqlCfg = MsSqlConfiguration.MsSql2000.ConnectionString(ConnectionString)
.ShowSql();
Fluently.Configure(config).Database(msSqlCfg)
.Mappings(m => m.FluentMappings.Add<EmployeeMap>())
// Other mappings
.BuildSessionFactory();
}
What should I fix to get Nhibernate log working?
Does it log if you generate statistics?
Configuration.ExposeConfiguration(c =>
c.SetProperty("generate_statistics", "true"));
To narrow things down can you remove additivity flag and appeder from within logger and just log one to start, i.e. exactly like this
<logger name="NHibernate">
<level value="ALL" />
</logger>
I'm trying to get Castle ActiveRecord to show me the SQL it generates. The various blogs I've found on this give two alternatives:
(1) Use the NHibernate "show_sql" setting. The trouble is, I'm using programmatic configuration, like this.
var config = XmlConfigurationSource.Build(
DatabaseType.MsSqlServer2008, Settings.Default.StationManagerDbConnectionString);
config.IsRunningInWebApp = isRunningInWebApp;
config.PluralizeTableNames = true;
var modelAssembly = Assembly.GetAssembly(typeof(OneOfMyClasses));
ActiveRecordStarter.Initialize(modelAssembly, config);
With programmatic configuration, there doesn't seem to be a way to specify "show_sql".
(2) Use log4net. But leaving aside what a pain log4net is to get working, I haven't found a way to get just the SQL. I get gobs and gobs of debug data, of which the SQL statements are just a small part.
So: Is there some way I can keep my programmatic configuration of Castle ActiveRecord but also get NHibernate to output just the SQL?
EDIT: Here's what I got to work with log4net. But in the first two pages of my web app, this spits out over 14,000 lines in the Debug window. How do I change this code to get only the SQL?
var appender = new log4net.Appender.DebugAppender
{
Layout = new log4net.Layout.SimpleLayout(),
Name = "NHibernate.SQL",
Threshold = log4net.Core.Level.Debug
};
log4net.Config.BasicConfigurator.Configure(appender);
You should be able to just separate out the sql by utilizing the NHibernate.SQL logger.
Example config:
<log4net>
<!-- This is a default logger that nhibernate uses to push out all the SQL statements to-->
<logger name="NHibernate.SQL" additivity="false">
<level value="DEBUG"/>
<appender-ref ref="NHibernateSQLLog"/>
</logger>
<!-- This is a default logger that nhibernate uses to push out all the debugging type information to-->
<logger name="NHibernate" additivity="false">
<level value="DEBUG"/>
<appender-ref ref="NHibernateFileLog"/>
</logger>
<appender name="NHibernateFileLog" type="log4net.Appender.RollingFileAppender">
<file value="Logs/nhibernate.txt" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="10MB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%d{HH:mm:ss.fff} [%t] %-5p %c - %m%n" />
</layout>
</appender>
<appender name="NHibernateSQLLog" type="log4net.Appender.RollingFileAppender">
<file value="Logs/nhibernate_sql.txt" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="10MB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%d{HH:mm:ss.fff} [%t] %-5p %c - %m%n" />
</layout>
</appender>
</log4net>
Edit:
var filter = new log4net.Filter.LoggerMatchFilter();
filter.LoggerToMatch = "NHibernate.SQL";
filter.AcceptOnMatch = true;
var filterDeny = new log4net.Filter.DenyAllFilter();
var appender = new log4net.Appender.DebugAppender
{
Layout = new log4net.Layout.SimpleLayout(),
Name = "NHibernate.SQL",
Threshold = log4net.Core.Level.Debug
};
appender.AddFilter(filter);
appender.AddFilter(filterDeny);
log4net.Config.BasicConfigurator.Configure(appender);
The very best tool for the task is the NHibernate Profiler ( http://nhprof.com/ ).
It's a commercial application but you get 30 days free trial.
This is how I create Session Factory using Fluent Nhibernate
public static ISessionFactory CreateSessionFactory()
{
FluentNHibernate.Cfg.FluentConfiguration fconfig;
fconfig = FluentNHibernate.Cfg.Fluently.Configure()
.Cache(c=>c.UseQueryCache())
.Database(FluentNHibernate.Cfg.Db.MsSqlConfiguration.MsSql2008
.ConnectionString(c => c.FromConnectionStringWithKey("Database"))
.ProxyFactoryFactory<NHibernate.ByteCode.LinFu.ProxyFactoryFactory>()
.Mappings(
m => m.FluentMappings
.AddFromAssemblyOf<NHibernateRepositoryRegistry>()
.Conventions.Add<Conventions.PrimaryKeyConvention>()
.Conventions.Add<Conventions.IdForeignKeyConvention>()
.Conventions.Add<Conventions.ReferenceForeignKeyConstraintNameConvention>()
)
// i have tried this but it did not work
//.ExposeConfiguration(config=>{config.SetProperty("show_sql", "false");});
return fconfig.BuildSessionFactory();
}
This is my log4net config inside Web.config
<appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
<file value="nhibernate.log" />
<appendToFile value="true" />
<maximumFileSize value="100KB" />
<maxSizeRollBackups value="2" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%level %thread %logger - %message%newline" />
</layout>
</appender>
<appender name="RollingFile2" type="log4net.Appender.RollingFileAppender">
<file value="nhibernatesql.log" />
<appendToFile value="true" />
<maximumFileSize value="100KB" />
<maxSizeRollBackups value="2" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%level %thread %logger - %message%newline" />
</layout>
</appender>
<logger name="NHibernate">
<level value="INFO" />
<appender-ref ref="RollingFile" />
</logger>
<logger name="NHibernate.SQL">
<level value="ALL" />
<appender-ref ref="RollingFile2" />
</logger>
<root>
<level value="DEBUG" />
<appender-ref ref="RollingFile" />
</root>
</log4net>
I had ShowSql() setup perviously
and I was trying to set it via web.config appsettings so i can turn on or off based on configuration
so I removed ShowSql() and tried following ( right now i am just passing "false" value )
.ExposeConfiguration(config=>{config.SetProperty("show_sql", "false");});
also tried
.ExposeConfiguration(config=>{config.SetProperty("hibernate.show_sql", "false");});
but I am still getting sql generated in nhibernatesql.log file
I am using NHibernate v3.1.0.4000 and FluentNHibernate v1.2.0.712 and ASP.NET MVC3
does anyone know why sql is still generating?
does show_sql or ShowSql() is only meant for Console.output purpose and sql is sent to log4net regardless ?
my main concern is slow performance if ShowSQL is set to true
not sure whether I am setting ShowSql somewhere else
ok I think I got the answer
based on http://www.davesquared.net/2008/01/viewing-sql-generated-by-nhibernate.html
show_sql is used of Console.out purpose only and sql is sent to log4net regardless.. and that is why I am seeing sql in the logs
I need to show the previous 10 events when a particular logger is triggered. The goal is to show what previous steps occurred immediately before NHibernate.SQL logging was issued.
Currently, I am logging NHibernate sql to a separate file - this is working correctly.
<appender name="NHibernateSqlAppender" type="log4net.Appender.RollingFileAppender">
<file value="Logs\NHibernate.log" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="10000KB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%d{dd/MM/yy HH:mm:ss,fff} [%t] %-5p %c - %m%n" />
</layout>
</appender>
<logger name="NHibernate.SQL" additivity="false">
<level value="ALL"/>
<appender-ref ref="NHibernateSqlAppender"/>
</logger>
<logger name="NHibernate" additivity="false">
<level value="WARN"/>
<appender-ref ref="NHibernateSqlAppender"/>
</logger>
But this only outputs SQL, without context. I would like all previous logs within a specified namespace to also be logged, but only when the HNibernate.SQL appender is triggered.
I have investigated the use of BufferingForwardingAppender as a means to collect all events, and then filter them within the NHibernateSqlAppender, but this is not working. I have read about the LoggerMatchFilter class, which seems like it is going to help, but I'm not sure where to put it.
<appender name="BufferingForwardingAppender" type="log4net.Appender.BufferingForwardingAppender" >
<bufferSize value="10" />
<lossy value="true" />
<evaluator type="log4net.Core.LevelEvaluator">
<threshold value="ALL"/>
</evaluator>
<appender-ref ref="NHibernateSqlAppender" />
</appender>
<appender name="NHibernateSqlAppender" type="log4net.Appender.RollingFileAppender">
<file value="Logs\NHibernate.log" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="10000KB" />
<staticLogFileName value="true" />
<filter type="log4net.Filter.LoggerMatchFilter">
<loggerToMatch value="NHibernate.SQL" />
<loggerToMatch value="Laan" />
</filter>
<filter type="log4net.Filter.LoggerMatchFilter">
<loggerToMatch value="NHibernate" />
<acceptOnMatch value="false"/>
</filter>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%d{dd/MM/yy HH:mm:ss,fff} [%t] %-5p %c - %m%n" />
</layout>
</appender>
<root>
<level value="ALL" />
<appender-ref ref="BufferingForwardingAppender"/>
</root>
The idea is that buffering appender will store all events, but then the NHibernateSqlAppender will only flush when an NHibernate.SQL event fires, plus it will flush the buffer (of 10 previous items, within the specified logger level, which in this example is Laan.*).
I would implement ITriggeringEventEvaluator that returns true in the IsTriggeringEvent() method when a certain logger (ideally configurable) fires. Have a look a the implementation of the LevelEvaluator class, it should be quite easy. The code would look like this:
public bool IsTriggeringEvent(LoggingEvent loggingEvent)
{
if (loggingEvent == null)
{
throw new ArgumentNullException("loggingEvent");
}
return (loggingEvent.LoggerName == triggeringLoggerName);
}
With this new evaluator your configuration should work though you should remove the filters (I guess).
I have this in my web.config file (edited to reflect some changes):
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />
</configSections>
<log4net debug="true">
<appender name="DebugAppender" type="log4net.Appender.AspNetTraceAppender">
<layout type="log4net.Layout.PatternLayout, log4net">
<param name="ConversionPattern" value="%d %p %m%n" />
</layout>
</appender>
<appender name="DataLog" type="log4net.Appender.RollingFileAppender">
<file value="c:\temp\nhlog.txt" />
<appendToFile value="true" />
<maximumFileSize value="100MB" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="5" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%d{HH:mm:ss.fff} [%t] %-5p %c - %m%n" />
</layout>
</appender>
<root>
<priority value="DEBUG" />
<appender-ref ref="DebugAppender" />
</root>
<logger name="NHibernate" additivity="false">
<level value="INFO"/>
<appender-ref ref="DebugAppender"/>
</logger>
</log4net>
I'm calling log4net.Config.XmlConfigurator.Configure() from Application_Start().
I have [assembly: log4net.Config.XmlConfigurator(Watch = true)] in the AssemblyInfo.cs file in my web project.
Why do I get no NHibernate debugging messages in my output window? (I trying to get ALL of the messages that NHibernate spits out.) If I use the RollingFileAppender it works fine. I've tried the DebugAppender, TraceAppender, OutputDebugStringAppender, and AspNetTraceAppender and none of them output stuff to the output window.
Try using a different appender.
ConsoleAppenders probably don't work for web applications. Use something like a FileAppender.
See this for examples on configuraiton.
Similar to quip's answer, ConsoleAppender is not the right appender to use in a web application. An OutputDebugStringAppender will give you messages in your debug window. You may also want to look into AspNetTraceAppender.
You could try to associate the specific NHibernate logger with a log4net appender.
If you want to log all the generated sql, try adding this to your log4net config section:
<logger name="NHibernate.SQL" additivity="false">
<level value="DEBUG" />
<appender-ref ref="ConsoleAppender" />
</logger>
If, for some reason, you only wanted to log Select statements and diagnostic info, you could use NHibernate.Loader.Loader, like this:
<logger name="NHibernate.Loader.Loader" additivity="false">
<level value="INFO" />
<appender-ref ref="ConsoleAppender" />
</logger>