The FEE Server Control Engine of the ALICE-TRD - Westfälische ...

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5 The FEEServer Control Engine types most frequently used are ebug and efatal. The type ebug indicates an error caused by a bug in the control engine. This type of error should not occur in normal operation. The type efatal is used for all errors which prevent the further execution of the control engine and requires action from the operator. After the error type is set, the error message is written to the class. As already mentioned it is not possible to use classes in the catchthrow mechanism. Therefore an integer value of 42 is thrown. Usually the exceptions are caught by CEStateMachine::triggerTransition(). The function prints the error type and the message stored in ErrorInfo to the logging system and sets the status of the FSM to state ERROR. E r r o r I n f o : : g e t I n s t a n c e ( )−>s e t E r r o r t y p e ( type ) ; * ( E r r o r I n f o : : g e t I n s t a n c e ( ) )
5 The FEEServer Control Engine at the end of the message. LogBufferManager contains a list of pointers to all output channels. The function sync(void) loops through the list and calls the function void sync(string message, string source, loglevel) of each output channel. These sync functions decide depending on the loglevel if the message should be printed out and do the actual output. All classes for the different output channel types are derived from the abstract class LogBuffer. At the moment there are four different output classes available. The class CoutLogBuffer provides an interface to STDOUT, the class FileLogBuffer writes the log messages to a file, the class SyslogLogBuffer prints it out to the Linux logging system and the class ODimLogBuffer publishes the log messages via the FEEServer to the DIM system. Even though the system is quite complex the usage is simple. During the initialization of the control engine one DIM logging channel and one syslog channel are created. The syntax for the DIM channel is for example tlog .addStream("dimlog", new ODimLogBuffer( einfo));. The parameter dimlog is the name of the channel and used to identify the channel. The second parameter ODimLogBuffer(edebug) specifies the type of the new channel and the log level of this channel. The syntax for the syslog channel is the same. After the initialization of the two channels, the command tlog
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5.2.4 Sensor Monitoring . . . . . .
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1 Introduction The standard model o
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2 Theoretical background first gene
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Temperature (MeV) 225 200 175 150 1
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2 Theoretical background Cold dense
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3 LHC and the ALICE experiment The
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