zypp::PluginScript Class Reference

Interface to pluigin scripts using a Stomp inspired communication protocol. More...

#include <PluginScript.h>

List of all members.

Classes
struct	Impl
	PluginScript implementation. More...
Public Types
typedef std::vector< std::string >	Arguments
	Commandline arguments passed to a script on open.
Public Member Functions
	PluginScript ()
	Default ctor.
	PluginScript (const Pathname &script_r)
	Ctor taking script path and no arguments.
	PluginScript (const Pathname &script_r, const Arguments &args_r)
	Ctor taking script path and script arguments.
const Pathname &	script () const
	Return the script path if set.
const Arguments &	args () const
	Return the script arguments if set.
bool	isOpen () const
	Whether we are connected to a script.
pid_t	getPid () const
	Return a connected scripts pid or NotConnected.
int	lastReturn () const
	Remembers a scripts return value after close until next open.
const std::string &	lastExecError () const
	Remembers a scripts execError string after close until next open.
void	open ()
	Setup connection and execute script.
void	open (const Pathname &script_r)
void	open (const Pathname &script_r, const Arguments &args_r)
int	close ()
	Close any open connection.
void	send (const PluginFrame &frame_r) const
	Send a PluginFrame.
PluginFrame	receive () const
	Receive a PluginFrame.
Static Public Attributes
static const pid_t	NotConnected
	pid_t(-1) constant indicating no connection.
Private Attributes
RW_pointer< Impl >	_pimpl
	Pointer to implementation.
Friends
std::ostream &	operator<< (std::ostream &str, const PluginScript &obj)

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Detailed Description

Interface to pluigin scripts using a Stomp inspired communication protocol.

Note:

PluginScript is copyable and assignable, but the connection is shared among multiple copies. It gets automatically closed if the last copy goes out of scope.

Timeout when sending/receiving data to/from a plugin default to 30 sec. The value (in seconds) my be changed via the environment variables ZYPP_PLUGIN_SEND_TIMEOUT, ZYPP_PLUGIN_RECEIVE_TIMEOUT or ZYPP_PLUGIN_TIMEOUT (both: send and receive).

  // Setup comnnection to plugin script
  PluginScript scr;
  PluginScript::Arguments args;
  args.push_back( "-v" );
  scr.open( "/soem/testplugin", args );

  // send frame to plugin
  PluginFrame f( "COMMAND" );
  f.setHeader( "key", "value" );
  f.setBody( "some\ndata" );
  scr.send( f );

  // receive frame from plugin
  PluginFrame r( scr.receive() );

  // explicitly close or let PluginScript go out of scope
  scr.close();

See also:

http://stomp.codehaus.org/

Definition at line 62 of file PluginScript.h.

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Member Typedef Documentation

typedef std::vector<std::string> zypp::PluginScript::Arguments

Commandline arguments passed to a script on open.

Definition at line 68 of file PluginScript.h.

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Constructor & Destructor Documentation

zypp::PluginScript::PluginScript

(

)

Default ctor.

Definition at line 412 of file PluginScript.cc.

zypp::PluginScript::PluginScript

(

const Pathname &

script_r

)

Ctor taking script path and no arguments.

Definition at line 416 of file PluginScript.cc.

zypp::PluginScript::PluginScript	(	const Pathname &	script_r,
		const Arguments &	args_r
	)

Ctor taking script path and script arguments.

Definition at line 420 of file PluginScript.cc.

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Member Function Documentation

const Pathname & zypp::PluginScript::script

(

)

const

Return the script path if set.

Definition at line 424 of file PluginScript.cc.

References _pimpl.

const PluginScript::Arguments & zypp::PluginScript::args

(

)

const

Return the script arguments if set.

Definition at line 427 of file PluginScript.cc.

References _pimpl.

bool zypp::PluginScript::isOpen

(

)

const

Whether we are connected to a script.

Definition at line 430 of file PluginScript.cc.

References _pimpl.

pid_t zypp::PluginScript::getPid

(

)

const

Return a connected scripts pid or NotConnected.

Definition at line 433 of file PluginScript.cc.

References _pimpl.

int zypp::PluginScript::lastReturn

(

)

const

Remembers a scripts return value after close until next open.

Definition at line 436 of file PluginScript.cc.

References _pimpl.

const std::string & zypp::PluginScript::lastExecError

(

)

const

Remembers a scripts execError string after close until next open.

See also:

ExternalProgram::execError.

Definition at line 439 of file PluginScript.cc.

References _pimpl.

void zypp::PluginScript::open

(

)

Setup connection and execute script.

Exceptions:

	PluginScriptException	if already connected to a script
	PluginScriptException	if script does not exist or is not executable
	PluginScriptException	on error

Definition at line 442 of file PluginScript.cc.

References _pimpl.

Referenced by zypp::target::TargetImpl::buildCache(), and zypp::media::UrlResolverPlugin::resolveUrl().

void zypp::PluginScript::open

(

const Pathname &

script_r

)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 445 of file PluginScript.cc.

References _pimpl.

void zypp::PluginScript::open	(	const Pathname &	script_r,
		const Arguments &	args_r
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 448 of file PluginScript.cc.

References _pimpl.

int zypp::PluginScript::close

(

)

Close any open connection.

Definition at line 451 of file PluginScript.cc.

References _pimpl.

void zypp::PluginScript::send

(

const PluginFrame &

frame_r

)

const

Send a PluginFrame.

Exceptions:

	PluginScriptNotConnected
	PluginScriptSendTimeout
	PluginScriptDiedUnexpectedly	(does not close)
	PluginScriptException	on error

Definition at line 454 of file PluginScript.cc.

References _pimpl.

Referenced by zypp::target::TargetImpl::buildCache(), and zypp::media::UrlResolverPlugin::resolveUrl().

PluginFrame zypp::PluginScript::receive

(

)

const

Receive a PluginFrame.

Exceptions:

	PluginScriptNotConnected
	PluginScriptReceiveTimeout
	PluginScriptDiedUnexpectedly	(does not close)
	PluginScriptException	on error

Definition at line 457 of file PluginScript.cc.

References _pimpl.

Referenced by zypp::target::TargetImpl::buildCache(), and zypp::media::UrlResolverPlugin::resolveUrl().

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Friends And Related Function Documentation

std::ostream & operator<<	(	std::ostream &	str,
		const PluginScript &	obj
	)			[friend]

Stream output

Definition at line 462 of file PluginScript.cc.

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Member Data Documentation

const pid_t zypp::PluginScript::NotConnected [static]

pid_t(-1) constant indicating no connection.

Definition at line 71 of file PluginScript.h.

Referenced by zypp::PluginScript::Impl::getPid().

RW_pointer<Impl> zypp::PluginScript::_pimpl [private]

Pointer to implementation.

Definition at line 141 of file PluginScript.h.

Referenced by args(), close(), getPid(), isOpen(), lastExecError(), lastReturn(), open(), zypp::operator<<(), receive(), script(), and send().

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

• zypp/PluginScript.h
• zypp/PluginScript.cc