NAME

       Restart Marker Plugin -

   Macros
       #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.

Macro Definition 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_tbegin_cb,
       globus_ftp_client_restart_marker_plugin_marker_cb_tmarker_cb,
       globus_ftp_client_restart_marker_plugin_complete_cb_tcomplete_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

       References GLOBUS_FTP_CLIENT_CMD_MASK_FILE_ACTIONS, GLOBUS_FTP_CLIENT_MODULE, and
       globus_ftp_client_restart_marker_plugin_init().

   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

       References GLOBUS_FTP_CLIENT_MODULE, and
       globus_ftp_client_restart_marker_plugin_destroy().

Author

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