BESCmdInterface Class Reference

Entry point into BES using string command requests. More...

#include <BESCmdInterface.h>

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List of all members.

Public Member Functions

 BESCmdInterface (const string &cmd, ostream *strm)
virtual ~BESCmdInterface ()
virtual int execute_request (const string &from)
 Override execute_request in order to register memory pool.
virtual void dump (ostream &strm) const
 dumps information about this object
virtual int finish_with_error (int status)

Static Public Member Functions

static void add_init_callback (p_bes_init init)
static void add_end_callback (p_bes_end end)

Protected Member Functions

virtual void initialize ()
 Initialize the BES.
virtual void validate_data_request ()
 Validate the incoming request information.
virtual void build_data_request_plan ()
 Build the data request plan using the BESCmdParser.
virtual void execute_data_request_plan ()
 Execute the data request plan.
virtual void invoke_aggregation ()
 Invoke the aggregation server, if there is one.
virtual void transmit_data ()
 Transmit the response object.
virtual void log_status ()
 Log the status of the request to the BESLog file.
virtual void clean ()
 Clean up after the request is completed.
virtual int exception_manager (BESError &e)
 Manage any exceptions thrown during the whole process.
virtual int finish (int status)
virtual void report_request ()
 Report the request and status of the request to BESReporterList::TheList().
virtual void end_request ()
 End the BES request.

Protected Attributes

BESDataHandlerInterface _dhi
BESTransmitter_transmitter


Detailed Description

Entry point into BES using string command requests.

The format of the request looks somethink like:

    set container in catalog values c,nc/mplot.nc;
    define d as c;
    get das for d;
    

In this example a DAS object response is being requested. The DAS object is to be built from the definition 'd', where d is defined using the data container c. The data container c is created using the real file nc/mplot.nc

BESCmdInterface uses BESParser to parse through the request string, building up a plan to be used during the execute method. Most implementations simply log information to the BESLog file before calling the parent class method.

See also:
BESInterface

BESParser


Constructor & Destructor Documentation

BESCmdInterface::BESCmdInterface ( const string &  cmd,
ostream *  strm 
)

BESCmdInterface::~BESCmdInterface (  )  [virtual]

References clean().

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Member Function Documentation

void BESInterface::add_end_callback ( p_bes_end  end  )  [static, inherited]

void BESInterface::add_init_callback ( p_bes_init  init  )  [static, inherited]

void BESCmdInterface::build_data_request_plan (  )  [protected, virtual]

void BESCmdInterface::clean (  )  [protected, virtual]

Clean up after the request is completed.

Calls the parent method clean and then logs to the BESLog file saying that we are done and exiting the process. The exit actually takes place in the module code.

See also:
BESLog

Reimplemented from BESInterface.

References BESInterface::_dhi, _BESDataHandlerInterface::data, DATA_REQUEST, REQUEST_FROM, SERVER_PID, and BESLog::TheLog().

Referenced by BESApacheInterface::~BESApacheInterface(), and ~BESCmdInterface().

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void BESCmdInterface::dump ( ostream &  strm  )  const [virtual]

dumps information about this object

Displays the pointer value of this instance

Parameters:
strm C++ i/o stream to dump the information to

Reimplemented from BESInterface.

References BESIndent::Indent(), BESIndent::LMarg(), and BESIndent::UnIndent().

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void BESInterface::end_request (  )  [protected, virtual, inherited]

End the BES request.

This method allows developers to add callbacks at the end of a request, to do any cleanup or do any extra work at the end of a request

References BESInterface::_dhi, BESDEBUG, _BESDataHandlerInterface::container, _BESDataHandlerInterface::data, DATA_REQUEST, _BESDataHandlerInterface::first_container(), _BESDataHandlerInterface::next_container(), and BESContainer::release().

Referenced by BESInterface::finish().

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int BESInterface::exception_manager ( BESError e  )  [protected, virtual, inherited]

Manage any exceptions thrown during the whole process.

Specific responses are generated given a specific Exception caught. If additional exceptions are thrown within derived systems then implement those in the derived exception_manager methods. This is a catch-all manager and should be called once derived methods have caught their exceptions.

Parameters:
e BESError to be managed
Returns:
status after exception is handled
See also:
BESError

Reimplemented in BESApacheInterface.

References BESInterface::_dhi, BESExceptionManager::handle_exception(), and BESExceptionManager::TheEHM().

Referenced by BESInterface::execute_request(), BESInterface::finish(), and BESInterface::finish_with_error().

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void BESCmdInterface::execute_data_request_plan (  )  [protected, virtual]

Execute the data request plan.

Simply calls the parent method. Prior to calling the parent method logs a message to the dods log file.

See also:
BESLog

Reimplemented from BESInterface.

References BESInterface::_dhi, _BESDataHandlerInterface::data, DATA_REQUEST, REQUEST_FROM, SERVER_PID, and BESLog::TheLog().

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int BESCmdInterface::execute_request ( const string &  from  )  [virtual]

Override execute_request in order to register memory pool.

Once the memory pool is initialized hand over control to parent class to execute the request. Once completed, unregister the memory pool.

This needs to be done here instead of the initialization method because???

Reimplemented from BESInterface.

int BESInterface::finish ( int  status  )  [protected, virtual, inherited]

int BESInterface::finish_with_error ( int  status  )  [virtual, inherited]

void BESCmdInterface::initialize (  )  [protected, virtual]

Initialize the BES.

Determines what transmitter this BES will be using to transmit response objects and then calls the parent initialization method in order to initialize all global variables.

See also:
BESTransmitter

_BESDataHandlerInterface

Reimplemented from BESInterface.

Reimplemented in BESApacheInterface.

References BESInterface::_dhi, BESInterface::_transmitter, BASIC_TRANSMITTER, BESDEBUG, BESReturnManager::find_transmitter(), HTTP_TRANSMITTER, BESReturnManager::TheManager(), and _BESDataHandlerInterface::transmit_protocol.

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void BESCmdInterface::invoke_aggregation (  )  [protected, virtual]

Invoke the aggregation server, if there is one.

Simply calls the parent method. Prior to calling the parent method logs a message to the dods log file.

See also:
BESLog

Reimplemented from BESInterface.

References BESInterface::_dhi, AGG_CMD, AGG_HANDLER, _BESDataHandlerInterface::data, DATA_REQUEST, BESAggFactory::find_handler(), BESLog::is_verbose(), REQUEST_FROM, SERVER_PID, BESAggFactory::TheFactory(), and BESLog::TheLog().

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void BESCmdInterface::log_status (  )  [protected, virtual]

Log the status of the request to the BESLog file.

See also:
BESLog

Reimplemented from BESInterface.

References BESInterface::_dhi, _BESDataHandlerInterface::data, DATA_REQUEST, _BESDataHandlerInterface::error_info, REQUEST_FROM, SERVER_PID, and BESLog::TheLog().

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void BESInterface::report_request (  )  [protected, virtual, inherited]

Report the request and status of the request to BESReporterList::TheList().

If interested in reporting the request and status of the request then one must register a BESReporter with BESReporterList::TheList().

If no BESReporter objects are registered then nothing happens.

See also:
BESReporterList

BESReporter

References BESInterface::_dhi, BESDEBUG, DATA_REQUEST, BESReporterList::report(), and BESReporterList::TheList().

Referenced by BESInterface::finish().

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void BESCmdInterface::transmit_data (  )  [protected, virtual]

Transmit the response object.

Simply calls the parent method. Prior to calling the parent method logs a message to the dods log file.

See also:
BESLog

Reimplemented from BESInterface.

References BESInterface::_dhi, _BESDataHandlerInterface::data, DATA_REQUEST, REQUEST_FROM, SERVER_PID, and BESLog::TheLog().

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void BESCmdInterface::validate_data_request (  )  [protected, virtual]

Validate the incoming request information.

Reimplemented from BESInterface.

Reimplemented in BESApacheInterface.


Member Data Documentation

BESTransmitter* BESInterface::_transmitter [protected, inherited]


The documentation for this class was generated from the following files:

Generated on Tue Jul 21 08:13:31 2009 for OPeNDAP Back End Server (BES) by  doxygen 1.5.8