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Restart Marker Plugin

Restart Marker Plugin

Section: globus ftp client (3) Updated: Sat Oct 16 2010
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NAME

Restart Marker Plugin -

This plugin is intended to allow users to make restart markers persistent.

 

Defines


#define GLOBUS_FTP_CLIENT_RESTART_MARKER_PLUGIN_MODULE (&globus_i_ftp_client_restart_marker_plugin_module)
 

Typedefs


typedef globus_bool_t(* globus_ftp_client_restart_marker_plugin_begin_cb_t )(void *user_arg, globus_ftp_client_handle_t *handle, const char *source_url, const char *dest_url, globus_ftp_client_restart_marker_t *user_saved_marker)

typedef void(* globus_ftp_client_restart_marker_plugin_marker_cb_t )(void *user_arg, globus_ftp_client_handle_t *handle, globus_ftp_client_restart_marker_t *marker)

typedef void(* globus_ftp_client_restart_marker_plugin_complete_cb_t )(void *user_arg, globus_ftp_client_handle_t *handle, globus_object_t *error, const char *error_url)
 

Functions


globus_result_t globus_ftp_client_restart_marker_plugin_init (globus_ftp_client_plugin_t *plugin, globus_ftp_client_restart_marker_plugin_begin_cb_t begin_cb, globus_ftp_client_restart_marker_plugin_marker_cb_t marker_cb, globus_ftp_client_restart_marker_plugin_complete_cb_t complete_cb, void *user_arg)

globus_result_t globus_ftp_client_restart_marker_plugin_destroy (globus_ftp_client_plugin_t *plugin)
 

Detailed Description

This plugin is intended to allow users to make restart markers persistent.

During a transfer, every marker received will result in the user's 'marker' callback being called with the new restart marker that can be stored. If the application were to prematurely terminate (while transferring), the user (after restarting the application) could pass this stored marker back to the plugin via the 'begin' callback to force the transfer to be restarted from the last marked point.  

Define Documentation

 

#define GLOBUS_FTP_CLIENT_RESTART_MARKER_PLUGIN_MODULE (&globus_i_ftp_client_restart_marker_plugin_module)

Module descriptor.  

Typedef Documentation

 

typedef globus_bool_t(* globus_ftp_client_restart_marker_plugin_begin_cb_t)(void *user_arg, globus_ftp_client_handle_t *handle, const char *source_url, const char *dest_url, globus_ftp_client_restart_marker_t *user_saved_marker)

Transfer begin callback

This callback is called when a get, put, or third party transfer is started. The intended use for this callback is for the user to use the transfer urls to locate a restart marker in some persistent storage. If one is found, it should be copied into 'user_saved_marker' and the callback should return GLOBUS_TRUE. This will cause the transfer to be restarted using that restart marker. If one is not found, return GLOBUS_FALSE to indicate that the transfer should proceed from the beginning.

In any case, this is also an opportunity for the user to set up any storage in anticipation of restart markers for this transfer.

Parameters:

handle this the client handle that this transfer will be occurring on
user_arg this is the user_arg passed to the init func
source_url source of the transfer (GLOBUS_NULL if 'put')
dest_url dest of the transfer (GLOBUS_NULL if 'get')
user_saved_marker pointer to an unitialized restart marker

Returns:

GLOBUS_TRUE to indicate that the plugin should use 'user_saved_marker' to restart the transfer (and subsequently, destroy the marker)
GLOBUS_FALSE to indicate that 'user_saved_marker' has not been modified, and that the transfer should proceed normally

 

typedef void(* globus_ftp_client_restart_marker_plugin_marker_cb_t)(void *user_arg, globus_ftp_client_handle_t *handle, globus_ftp_client_restart_marker_t *marker)

Restart marker received callback

This callback will be called every time a restart marker is available. To receive restart markers in a 'put' or 'third_party_transfer', the transfer must be in Extended Block mode. 'get' transfers will have their markers generated internally. Markers generated internally will be 'sent' at most, once per second.

The intended use for this callback is to allow the user to store this marker (most likely in place of any previous marker) in a format that the 'begin_cb' can parse and pass back.

Parameters:

handle this the client handle that this transfer is occurring on
user_arg this is the user_arg passed to the init func
marker the restart marker that has been received. Thsi marker is owned by the caller. The user must use the copy method to keep it. Note: this restart marker currently contains all ranges received as of yet. Should I instead only pass a marker with the ranges just made available? If so, the user may need a way to combine restart markers (globus_ftp_client_restart_marker_combine)

Returns:

n/a

 

typedef void(* globus_ftp_client_restart_marker_plugin_complete_cb_t)(void *user_arg, globus_ftp_client_handle_t *handle, globus_object_t *error, const char *error_url)

Transfer complete callback

This callback will be called upon transfer completion (successful or otherwise). Parameters:

handle this the client handle that this transfer was occurring on
user_arg this is the user_arg passed to the init func
error the error object indicating what went wrong (GLOBUS_NULL on success)
error_url the url which is the source of the above error (GLOBUS_NULL on success)

Returns:

n/a

 

Function Documentation

 

globus_result_t globus_ftp_client_restart_marker_plugin_init (globus_ftp_client_plugin_t * plugin, globus_ftp_client_restart_marker_plugin_begin_cb_t begin_cb, globus_ftp_client_restart_marker_plugin_marker_cb_t marker_cb, globus_ftp_client_restart_marker_plugin_complete_cb_t complete_cb, void * user_arg)

Initialize a restart marker plugin

This function initializes a restart marker plugin. Any params except for the plugin may be GLOBUS_NULL

Parameters:

plugin a pointer to a plugin type to be initialized
user_arg a pointer to some user specific data that will be provided to all callbacks
begin_cb the callback to be called upon the start of a transfer
marker_cb the callback to be called with every restart marker received
complete_cb the callback to be called to indicate transfer completion

Returns:

GLOBUS_SUCCESS
Error on NULL plugin
Error on init internal plugin

 

globus_result_t globus_ftp_client_restart_marker_plugin_destroy (globus_ftp_client_plugin_t * plugin)

Destroy restart marker plugin

Frees up memory associated with plugin. Parameters:

plugin plugin previously initialized with init (above)

Returns:

GLOBUS_SUCCESS
Error on NULL plugin

 

Author

Generated automatically by Doxygen for globus ftp client from the source code.


 

Index

NAME
Defines
Typedefs
Functions
Detailed Description
Define Documentation
#define GLOBUS_FTP_CLIENT_RESTART_MARKER_PLUGIN_MODULE (&globus_i_ftp_client_restart_marker_plugin_module)
Typedef Documentation
typedef globus_bool_t(* globus_ftp_client_restart_marker_plugin_begin_cb_t)(void *user_arg, globus_ftp_client_handle_t *handle, const char *source_url, const char *dest_url, globus_ftp_client_restart_marker_t *user_saved_marker)
typedef void(* globus_ftp_client_restart_marker_plugin_marker_cb_t)(void *user_arg, globus_ftp_client_handle_t *handle, globus_ftp_client_restart_marker_t *marker)
typedef void(* globus_ftp_client_restart_marker_plugin_complete_cb_t)(void *user_arg, globus_ftp_client_handle_t *handle, globus_object_t *error, const char *error_url)
Function Documentation
globus_result_t globus_ftp_client_restart_marker_plugin_init (globus_ftp_client_plugin_t * plugin, globus_ftp_client_restart_marker_plugin_begin_cb_t begin_cb, globus_ftp_client_restart_marker_plugin_marker_cb_t marker_cb, globus_ftp_client_restart_marker_plugin_complete_cb_t complete_cb, void * user_arg)
globus_result_t globus_ftp_client_restart_marker_plugin_destroy (globus_ftp_client_plugin_t * plugin)
Author

This document was created by man2html, using the manual pages.
Time: 21:47:00 GMT, April 16, 2011