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clean up wirewatch logic

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This commit is contained in:
Christian Grothoff 2020-03-15 21:20:56 +01:00
parent c898a1e13b
commit d3f7cc1184
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GPG Key ID: 939E6BE1E29FC3CC
2 changed files with 154 additions and 109 deletions
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8
src/exchange/exchange.conf
View File

@ -54,9 +54,15 @@ PORT = 8081
BASE_URL = http://localhost:8081/
# How long should the aggregator sleep if it has nothing to do?
# How long should the aggregator (and closer, and transfer)
# sleep if it has nothing to do?
AGGREGATOR_IDLE_SLEEP_INTERVAL = 60 s
# How long should wirewatch sleep if it has nothing to do?
# (Set very aggressively here for the demonstrators to be
# super fast.)
WIREWATCH_IDLE_SLEEP_INTERVAL = 1 s
# how long is one signkey valid?
SIGNKEY_DURATION = 4 weeks

255
src/exchange/taler-exchange-wirewatch.c
View File

@ -1,6 +1,6 @@
/*
This file is part of TALER
Copyright (C) 2016, 2017, 2018 Taler Systems SA
Copyright (C) 2016--2020 Taler Systems SA
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU Affero General Public License as published by the Free Software
@ -29,12 +29,13 @@
#include "taler_json_lib.h"
#include "taler_bank_service.h"
/**
* How long do we sleep before trying again if there
* are no transactions returned by the wire plugin?
*/
#define DELAY GNUNET_TIME_UNIT_SECONDS
#define DEBUG_LOGGING 0
/**
* What is the initial batch size we use for credit history
* requests with the bank. See `batch_size` below.
*/
#define INITIAL_BATCH_SIZE 1024
/**
* Information we keep for each supported account.
@ -56,11 +57,48 @@ struct WireAccount
*/
char *section_name;
/**
* Database session we are using for the current transaction.
*/
struct TALER_EXCHANGEDB_Session *session;
/**
* Active request for history.
*/
struct TALER_BANK_CreditHistoryHandle *hh;
/**
* Authentication data.
*/
struct TALER_BANK_AuthenticationData auth;
/**
* Until when is processing this wire plugin delayed?
*/
struct GNUNET_TIME_Absolute delayed_until;
/**
* Encoded offset in the wire transfer list from where
* to start the next query with the bank.
*/
uint64_t last_row_off;
/**
* Latest row offset seen in this transaction, becomes
* the new #last_row_off upon commit.
*/
uint64_t latest_row_off;
/**
* How many transactions do we retrieve per batch?
*/
unsigned int batch_size;
/**
* How many transactions did we see in the current batch?
*/
unsigned int current_batch_size;
/**
* Are we running from scratch and should re-process all transactions
* for this account?
@ -68,9 +106,10 @@ struct WireAccount
int reset_mode;
/**
* Until when is processing this wire plugin delayed?
* Should we delay the next request to the wire plugin a bit? Set to
* #GNUNET_NO if we actually did some work.
*/
struct GNUNET_TIME_Absolute delayed_until;
int delay;
};
@ -86,7 +125,8 @@ static struct WireAccount *wa_head;
static struct WireAccount *wa_tail;
/**
* Wire plugin we are currently using.
* Wire account we are currently processing. This would go away
* if we ever start processing all accounts in parallel.
*/
static struct WireAccount *wa_pos;
@ -111,27 +151,25 @@ static const struct GNUNET_CONFIGURATION_Handle *cfg;
static struct TALER_EXCHANGEDB_Plugin *db_plugin;
/**
* Value to return from main(). #GNUNET_OK on success, #GNUNET_SYSERR
* How long should we sleep when idle before trying to find more work?
*/
static struct GNUNET_TIME_Relative wirewatch_idle_sleep_interval;
/**
* Value to return from main(). 0 on success, non-zero on
* on serious errors.
*/
static int global_ret;
/**
* Encoded offset in the wire transfer list from where
* to start the next query with the bank.
*/
static uint64_t last_row_off;
/**
* Latest row offset seen in this transaction, becomes
* the new #last_row_off upon commit.
*/
static uint64_t latest_row_off;
/**
* Should we delay the next request to the wire plugin a bit?
*/
static int delay;
static enum
{
GR_SUCCESS = 0,
GR_DATABASE_SESSION_FAIL = 1,
GR_DATABASE_TRANSACTION_BEGIN_FAIL = 2,
GR_DATABASE_SELECT_LATEST_HARD_FAIL = 3,
GR_BANK_REQUEST_HISTORY_FAIL = 4,
GR_CONFIGURATION_INVALID = 5,
GR_CMD_LINE_UTF8_ERROR = 6,
GR_CMD_LINE_OPTIONS_WRONG = 7,
} global_ret;
/**
* Are we run in testing mode and should only do one pass?
@ -144,25 +182,10 @@ static int test_mode;
static int reset_mode;
/**
* How many transactions do we retrieve per batch?
*/
static unsigned int batch_size = 1024;
/**
* How many transactions did we see in the current batch?
*/
static unsigned int current_batch_size;
/**
* Next task to run, if any.
* Current task waiting for execution, if any.
*/
static struct GNUNET_SCHEDULER_Task *task;
/**
* Active request for history.
*/
static struct TALER_BANK_CreditHistoryHandle *hh;
/**
* We're being aborted with CTRL-C (or SIGTERM). Shut down.
@ -173,11 +196,26 @@ static void
shutdown_task (void *cls)
{
(void) cls;
if (NULL != hh)
{
TALER_BANK_credit_history_cancel (hh);
hh = NULL;
struct WireAccount *wa;
while (NULL != (wa = wa_head))
{
if (NULL != wa->hh)
{
TALER_BANK_credit_history_cancel (wa->hh);
wa->hh = NULL;
}
GNUNET_CONTAINER_DLL_remove (wa_head,
wa_tail,
wa);
TALER_BANK_auth_free (&wa->auth);
GNUNET_free (wa->section_name);
GNUNET_free (wa);
}
}
wa_pos = NULL;
if (NULL != ctx)
{
GNUNET_CURL_fini (ctx);
@ -195,21 +233,6 @@ shutdown_task (void *cls)
}
TALER_EXCHANGEDB_plugin_unload (db_plugin);
db_plugin = NULL;
{
struct WireAccount *wa;
while (NULL != (wa = wa_head))
{
GNUNET_CONTAINER_DLL_remove (wa_head,
wa_tail,
wa);
TALER_BANK_auth_free (&wa->auth);
GNUNET_free (wa->section_name);
GNUNET_free (wa);
}
}
wa_pos = NULL;
last_row_off = 0;
}
@ -243,6 +266,7 @@ add_account_cb (void *cls,
return;
}
wa->section_name = GNUNET_strdup (ai->section_name);
wa->batch_size = INITIAL_BATCH_SIZE;
GNUNET_CONTAINER_DLL_insert (wa_head,
wa_tail,
wa);
@ -258,6 +282,17 @@ add_account_cb (void *cls,
static int
exchange_serve_process_config (void)
{
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_time (cfg,
"exchange",
"WIREWATCH_IDLE_SLEEP_INTERVAL",
&wirewatch_idle_sleep_interval))
{
GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
"exchange",
"WIREWATCH_IDLE_SLEEP_INTERVAL");
return GNUNET_SYSERR;
}
if (NULL ==
(db_plugin = TALER_EXCHANGEDB_plugin_load (cfg)))
{
@ -292,7 +327,7 @@ find_transfers (void *cls);
* Callbacks of this type are used to serve the result of asking
* the bank for the transaction history.
*
* @param cls closure with the `struct TALER_EXCHANGEDB_Session *`
* @param cls closure with the `struct WioreAccount *` we are processing
* @param http_status HTTP status code from the server
* @param ec taler error code
* @param serial_id identification of the position at which we are querying
@ -308,13 +343,14 @@ history_cb (void *cls,
const struct TALER_BANK_CreditDetails *details,
const json_t *json)
{
struct TALER_EXCHANGEDB_Session *session = cls;
struct WireAccount *wa = cls;
struct TALER_EXCHANGEDB_Session *session = wa->session;
enum GNUNET_DB_QueryStatus qs;
(void) json;
if (NULL == details)
{
hh = NULL;
wa->hh = NULL;
if (TALER_EC_NONE != ec)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
@ -331,8 +367,8 @@ history_cb (void *cls,
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Got DB soft error for commit\n");
/* reduce transaction size to reduce rollback probability */
if (2 > current_batch_size)
current_batch_size /= 2;
if (2 > wa->current_batch_size)
wa->current_batch_size /= 2;
/* try again */
GNUNET_assert (NULL == task);
task = GNUNET_SCHEDULER_add_now (&find_transfers,
@ -342,27 +378,28 @@ history_cb (void *cls,
if (0 < qs)
{
/* transaction success, update #last_row_off */
last_row_off = latest_row_off;
latest_row_off = 0;
wa->last_row_off = wa->latest_row_off;
wa->latest_row_off = 0; /* should not be needed */
wa->session = NULL; /* should not be needed */
/* if successful at limit, try increasing transaction batch size (AIMD) */
if (current_batch_size == batch_size)
batch_size++;
if ( (wa->current_batch_size == wa->batch_size) &&
(UINT_MAX > wa->batch_size) )
wa->batch_size++;
}
GNUNET_break (0 <= qs);
if ( (GNUNET_YES == delay) &&
if ( (GNUNET_YES == wa->delay) &&
(test_mode) &&
(NULL == wa_pos->next) )
(NULL == wa->next) )
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Shutdown due to test mode!\n");
GNUNET_SCHEDULER_shutdown ();
return GNUNET_OK;
}
if (GNUNET_YES == delay)
if (GNUNET_YES == wa->delay)
{
wa_pos->delayed_until
= GNUNET_TIME_relative_to_absolute (DELAY);
wa->delayed_until
= GNUNET_TIME_relative_to_absolute (wirewatch_idle_sleep_interval);
wa_pos = wa_pos->next;
if (NULL == wa_pos)
wa_pos = wa_head;
@ -381,29 +418,32 @@ history_cb (void *cls,
/**
* Debug block.
*/
#if DEBUG_LOGGING
{
/* Should be 53, give 80 just to be redundant. */
/** Should be 53, give 80 just to be extra conservative (and aligned). */
#define PUBSIZE 80
char wtid_s[PUBSIZE];
GNUNET_break
(NULL != GNUNET_STRINGS_data_to_string (&details->reserve_pub,
sizeof (details->reserve_pub),
&wtid_s[0],
PUBSIZE));
GNUNET_break (NULL !=
GNUNET_STRINGS_data_to_string (&details->reserve_pub,
sizeof (details->reserve_pub),
&wtid_s[0],
PUBSIZE));
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Plain text subject (= reserve_pub): %s\n",
wtid_s);
}
#endif
current_batch_size++;
if (wa->current_batch_size < UINT_MAX)
wa->current_batch_size++;
qs = db_plugin->reserves_in_insert (db_plugin->cls,
session,
&details->reserve_pub,
&details->amount,
details->execution_date,
details->debit_account_url,
wa_pos->section_name,
wa->section_name,
serial_id);
if (GNUNET_DB_STATUS_HARD_ERROR == qs)
{
@ -425,8 +465,8 @@ history_cb (void *cls,
NULL);
return GNUNET_SYSERR;
}
latest_row_off = serial_id;
wa->delay = GNUNET_NO;
wa->latest_row_off = serial_id;
return GNUNET_OK;
}
@ -446,12 +486,11 @@ find_transfers (void *cls)
task = NULL;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Checking for incoming wire transfers\n");
if (NULL == (session = db_plugin->get_session (db_plugin->cls)))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Failed to obtain database session!\n");
global_ret = GNUNET_SYSERR;
global_ret = GR_DATABASE_SESSION_FAIL;
GNUNET_SCHEDULER_shutdown ();
return;
}
@ -464,7 +503,7 @@ find_transfers (void *cls)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Failed to start database transaction!\n");
global_ret = GNUNET_SYSERR;
global_ret = GR_DATABASE_TRANSACTION_BEGIN_FAIL;
GNUNET_SCHEDULER_shutdown ();
return;
}
@ -473,14 +512,14 @@ find_transfers (void *cls)
qs = db_plugin->get_latest_reserve_in_reference (db_plugin->cls,
session,
wa_pos->section_name,
&last_row_off);
&wa_pos->last_row_off);
if (GNUNET_DB_STATUS_HARD_ERROR == qs)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Failed to obtain starting point for montoring from database!\n");
db_plugin->rollback (db_plugin->cls,
session);
global_ret = GNUNET_SYSERR;
global_ret = GR_DATABASE_SELECT_LATEST_HARD_FAIL;
GNUNET_SCHEDULER_shutdown ();
return;
}
@ -493,28 +532,28 @@ find_transfers (void *cls)
NULL);
return;
}
wa_pos->reset_mode = GNUNET_NO;
}
wa_pos->reset_mode = GNUNET_NO;
delay = GNUNET_YES;
current_batch_size = 0;
wa_pos->delay = GNUNET_YES;
wa_pos->current_batch_size = 0; /* reset counter */
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"wirewatch: requesting incoming history from %s\n",
wa_pos->auth.wire_gateway_url);
hh = TALER_BANK_credit_history (ctx,
&wa_pos->auth,
last_row_off,
batch_size,
&history_cb,
session);
if (NULL == hh)
wa_pos->session = session;
wa_pos->hh = TALER_BANK_credit_history (ctx,
&wa_pos->auth,
wa_pos->last_row_off,
wa_pos->batch_size,
&history_cb,
wa_pos);
if (NULL == wa_pos->hh)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Failed to start request for account history!\n");
db_plugin->rollback (db_plugin->cls,
session);
global_ret = GNUNET_SYSERR;
global_ret = GR_BANK_REQUEST_HISTORY_FAIL;
GNUNET_SCHEDULER_shutdown ();
return;
}
@ -542,7 +581,7 @@ run (void *cls,
if (GNUNET_OK !=
exchange_serve_process_config ())
{
global_ret = 1;
global_ret = GR_CONFIGURATION_INVALID;
return;
}
wa_pos = wa_head;
@ -567,7 +606,7 @@ run (void *cls,
*
* @param argc number of arguments from the command line
* @param argv command line arguments
* @return 0 ok, 1 on error
* @return 0 ok, non-zero on error
*/
int
main (int argc,
@ -590,7 +629,7 @@ main (int argc,
if (GNUNET_OK !=
GNUNET_STRINGS_get_utf8_args (argc, argv,
&argc, &argv))
return 2;
return GR_CMD_LINE_UTF8_ERROR;
if (GNUNET_OK !=
GNUNET_PROGRAM_run (argc, argv,
"taler-exchange-wirewatch",
@ -600,7 +639,7 @@ main (int argc,
&run, NULL))
{
GNUNET_free ((void *) argv);
return 1;
return GR_CMD_LINE_OPTIONS_WRONG;
}
GNUNET_free ((void *) argv);
return global_ret;