sync skeleton
This commit is contained in:
Christian Grothoff
parent
5eed611594
commit
e3156e88a7
@ -18,6 +18,7 @@ bin_PROGRAMS = \
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taler-auditor-dbinit \
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taler-auditor-exchange \
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taler-auditor-httpd \
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taler-auditor-sync \
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taler-helper-auditor-aggregation \
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taler-helper-auditor-coins \
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taler-helper-auditor-deposits \
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@ -170,6 +171,23 @@ taler_auditor_exchange_LDADD = \
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-lgnunetutil \
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$(XLIB)
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taler_auditor_sync_SOURCES = \
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taler-auditor-sync.c
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taler_auditor_sync_LDADD = \
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$(LIBGCRYPT_LIBS) \
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$(top_builddir)/src/util/libtalerutil.la \
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$(top_builddir)/src/pq/libtalerpq.la \
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$(top_builddir)/src/exchangedb/libtalerexchangedb.la \
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-lgnunetutil \
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$(XLIB)
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taler_auditor_dbinit_LDFLAGS = \
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$(POSTGRESQL_LDFLAGS)
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taler_auditor_dbinit_CPPFLAGS = \
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-I$(top_srcdir)/src/include \
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-I$(top_srcdir)/src/pq/ \
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$(POSTGRESQL_CPPFLAGS)
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check_SCRIPTS = \
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test-auditor.sh \
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test-revocation.sh
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328
src/auditor/taler-auditor-sync.c
Normal file
328
src/auditor/taler-auditor-sync.c
Normal file
@ -0,0 +1,328 @@
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/*
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This file is part of TALER
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Copyright (C) 2020 Taler Systems SA
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TALER is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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*/
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/**
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* @file taler-auditor-sync.c
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* @brief Tool used by the auditor to make a 'safe' copy of the exchanges' database.
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* @author Christian Grothoff
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*/
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#include <platform.h>
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#include "taler_exchangedb_lib.h"
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/**
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* Handle to access the exchange's source database.
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*/
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static struct TALER_EXCHANGEDB_Plugin *src;
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/**
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* Handle to access the exchange's destination database.
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*/
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static struct TALER_EXCHANGEDB_Plugin *dst;
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/**
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* Return value from #main().
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*/
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static int global_ret;
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/**
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* Main task to do synchronization.
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*/
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static struct GNUNET_SCHEDULER_Task *sync_task;
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/**
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* What is our target transaction size (number of records)?
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*/
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static unsigned int transaction_size = 512;
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/**
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* Number of records copied in this transaction.
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*/
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static unsigned int actual_size;
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/**
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* Set an option of type 'char *' from the command line with
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* filename expansion a la #GNUNET_STRINGS_filename_expand().
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*
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* @param ctx command line processing context
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* @param scls additional closure (will point to the `char *`,
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* which will be allocated)
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* @param option name of the option
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* @param value actual value of the option (a string)
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* @return #GNUNET_OK
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*/
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static int
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set_filename (struct GNUNET_GETOPT_CommandLineProcessorContext *ctx,
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void *scls,
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const char *option,
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const char *value)
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{
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char **val = scls;
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(void) ctx;
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(void) option;
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GNUNET_assert (NULL != value);
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GNUNET_free (*val);
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*val = GNUNET_STRINGS_filename_expand (value);
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return GNUNET_OK;
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}
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/**
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* Allow user to specify configuration file name (-s option)
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*
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* @param[out] fn set to the name of the configuration file
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*/
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static struct GNUNET_GETOPT_CommandLineOption
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option_cfgfile_src (char **fn)
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{
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struct GNUNET_GETOPT_CommandLineOption clo = {
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.shortName = 's',
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.name = "source-configuration",
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.argumentHelp = "FILENAME",
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.description = gettext_noop (
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"use configuration file FILENAME for the SOURCE database"),
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.require_argument = 1,
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.processor = &set_filename,
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.scls = (void *) fn
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};
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return clo;
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}
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/**
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* Allow user to specify configuration file name (-d option)
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*
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* @param[out] fn set to the name of the configuration file
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*/
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static struct GNUNET_GETOPT_CommandLineOption
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option_cfgfile_dst (char **fn)
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{
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struct GNUNET_GETOPT_CommandLineOption clo = {
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.shortName = 'd',
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.name = "destination-configuration",
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.argumentHelp = "FILENAME",
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.description = gettext_noop (
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"use configuration file FILENAME for the DESTINATION database"),
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.require_argument = 1,
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.processor = &set_filename,
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.scls = (void *) fn
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};
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return clo;
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}
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static struct GNUNET_CONFIGURATION_Handle *
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load_config (const char *cfgfile)
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{
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struct GNUNET_CONFIGURATION_Handle *cfg;
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cfg = GNUNET_CONFIGURATION_create ();
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GNUNET_log (GNUNET_ERROR_TYPE_INFO,
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"Loading config file: %s\n",
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cfgfile);
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if (GNUNET_SYSERR ==
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GNUNET_CONFIGURATION_load (cfg,
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cfgfile))
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{
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GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
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"Malformed configuration file `%s', exit ...\n",
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cfgfile);
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GNUNET_CONFIGURATION_destroy (cfg);
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return NULL;
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}
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return cfg;
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}
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/**
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* Task to do the actual synchronization work.
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*
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* @param cls NULL, unused
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*/
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static void
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do_sync (void *cls)
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{
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struct GNUNET_TIME_Relative delay;
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sync_task = NULL;
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actual_size = 0;
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// FIXME: do real work here!
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if (actual_size < transaction_size / 2)
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{
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delay = GNUNET_TIME_STD_BACKOFF (delay);
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}
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else if (actual_size >= transaction_size)
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{
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delay = GNUNET_TIME_UNIT_ZERO;
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}
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sync_task = GNUNET_SCHEDULER_add_delayed (delay,
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&do_sync,
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NULL);
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}
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/**
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* Shutdown task.
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*
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* @param cls NULL, unused
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*/
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static void
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do_shutdown (void *cls)
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{
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if (NULL != sync_task)
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{
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GNUNET_SCHEDULER_cancel (sync_task);
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sync_task = NULL;
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}
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}
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/**
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* Initial task.
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*
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* @param cls NULL, unused
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*/
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static void
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run (void *cls)
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{
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(void) cls;
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GNUNET_SCHEDULER_add_shutdown (&do_shutdown,
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NULL);
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sync_task = GNUNET_SCHEDULER_add_now (&do_sync,
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NULL);
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}
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/**
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* Setup plugins in #src and #dst and #run() the main
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* logic with those plugins.
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*/
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static void
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setup (struct GNUNET_CONFIGURATION_Handle *src_cfg,
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struct GNUNET_CONFIGURATION_Handle *dst_cfg)
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{
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src = TALER_EXCHANGEDB_plugin_load (src_cfg);
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if (NULL == src)
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{
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global_ret = 3;
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return;
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}
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dst = TALER_EXCHANGEDB_plugin_load (dst_cfg);
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if (NULL == dst)
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{
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global_ret = 3;
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TALER_EXCHANGEDB_plugin_unload (src);
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src = NULL;
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return;
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}
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GNUNET_SCHEDULER_run (&run,
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NULL);
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TALER_EXCHANGEDB_plugin_unload (src);
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src = NULL;
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TALER_EXCHANGEDB_plugin_unload (dst);
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dst = NULL;
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}
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/**
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* The main function of the taler-auditor-exchange tool. This tool is used
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* to add (or remove) an exchange's master key and base URL to the auditor's
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* database.
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*
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* @param argc number of arguments from the command line
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* @param argv command line arguments
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* @return 0 ok, non-zero on error
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*/
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int
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main (int argc,
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char *const *argv)
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{
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char *src_cfgfile = NULL;
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char *dst_cfgfile = NULL;
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struct GNUNET_CONFIGURATION_Handle *src_cfg;
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struct GNUNET_CONFIGURATION_Handle *dst_cfg;
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const struct GNUNET_GETOPT_CommandLineOption options[] = {
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GNUNET_GETOPT_option_mandatory (
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option_cfgfile_src (&src_cfgfile)),
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GNUNET_GETOPT_option_mandatory (
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option_cfgfile_dst (&dst_cfgfile)),
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GNUNET_GETOPT_option_help (
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gettext_noop ("Make a safe copy of an exchange database")),
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GNUNET_GETOPT_option_uint (
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'b',
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"batch",
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"SIZE",
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gettext_noop (
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"target SIZE for a the number of records to copy in one transaction"),
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&transaction_size),
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GNUNET_GETOPT_option_version (VERSION "-" VCS_VERSION),
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GNUNET_GETOPT_OPTION_END
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};
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TALER_gcrypt_init (); /* must trigger initialization manually at this point! */
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GNUNET_assert (GNUNET_OK ==
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GNUNET_log_setup ("taler-auditor-sync",
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"WARNING",
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NULL));
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{
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int ret;
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ret = GNUNET_GETOPT_run ("taler-auditor-sync",
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options,
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argc, argv);
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if (GNUNET_NO == ret)
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return 0;
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if (GNUNET_SYSERR == ret)
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return 1;
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}
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if (0 == strcmp (src_cfgfile,
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dst_cfgfile))
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{
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GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
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"Source and destination configuration files must differ!\n");
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return 1;
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}
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src_cfg = load_config (src_cfgfile);
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if (NULL == src_cfg)
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{
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GNUNET_free (src_cfgfile);
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GNUNET_free (dst_cfgfile);
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return 1;
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}
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dst_cfg = load_config (dst_cfgfile);
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if (NULL == dst_cfg)
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{
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GNUNET_CONFIGURATION_destroy (src_cfg);
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GNUNET_free (src_cfgfile);
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GNUNET_free (dst_cfgfile);
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return 1;
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}
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setup (src_cfg,
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dst_cfg);
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GNUNET_CONFIGURATION_destroy (src_cfg);
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GNUNET_CONFIGURATION_destroy (dst_cfg);
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GNUNET_free (src_cfgfile);
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GNUNET_free (dst_cfgfile);
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return global_ret;
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}
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/* end of taler-auditor-sync.c */
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