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kvstore.c
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kvstore.c
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/*
* Showtime Mediacenter
* Copyright (C) 2007-2013 Lonelycoder AB
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* This program is also available under a commercial proprietary license.
* For more information, contact andreas@lonelycoder.com
*/
#include <sys/stat.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <sqlite3.h>
#include "config.h"
#include "showtime.h"
#include "prop/prop.h"
#include "db/db_support.h"
#include "kvstore.h"
#include "misc/callout.h"
LIST_HEAD(kvstore_deferred_write_list, kvstore_deferred_write);
typedef struct kvstore_deferred_write {
LIST_ENTRY(kvstore_deferred_write) kdw_link;
char *kdw_url;
int kdw_domain;
char *kdw_key;
int kdw_type;
union {
char *kdw_string;
int kdw_int;
int64_t kdw_int64;
};
} kvstore_deferred_write_t;
static db_pool_t *kvstore_pool;
static struct kvstore_deferred_write_list deferred_writes;
static callout_t deferred_callout;
static hts_mutex_t deferred_mutex;
/**
*
*/
void
kvstore_fini(void)
{
db_pool_close(kvstore_pool);
}
/**
*
*/
void *
kvstore_get(void)
{
return db_pool_get(kvstore_pool);
}
/**
*
*/
void
kvstore_close(void *db)
{
db_pool_put(kvstore_pool, db);
}
/**
*
*/
void
kvstore_init(void)
{
sqlite3 *db;
char buf[256];
hts_mutex_init(&deferred_mutex);
snprintf(buf, sizeof(buf), "%s/kvstore", gconf.persistent_path);
mkdir(buf, 0770);
snprintf(buf, sizeof(buf), "%s/kvstore/kvstore.db", gconf.persistent_path);
// unlink(buf);
kvstore_pool = db_pool_create(buf, 2);
db = kvstore_get();
if(db == NULL)
return;
snprintf(buf, sizeof(buf), "%s/resources/kvstore", showtime_dataroot());
int r = db_upgrade_schema(db, buf, "kvstore", NULL, NULL);
kvstore_close(db);
if(r)
kvstore_pool = NULL; // Disable
}
typedef struct kv_prop_bind {
uint64_t kpb_id; // ID of row in URL table
prop_sub_t *kpb_sub;
int kpb_init;
char *kpb_url;
} kv_prop_bind_t;
/**
*
*/
static int
get_url(void *db, const char *url, uint64_t *id)
{
int rc;
sqlite3_stmt *stmt;
rc = db_prepare(db, &stmt,
"SELECT id FROM url WHERE url=?1");
if(rc != SQLITE_OK)
return rc;
sqlite3_bind_text(stmt, 1, url, -1, SQLITE_STATIC);
rc = sqlite3_step(stmt);
if(rc == SQLITE_LOCKED) {
sqlite3_finalize(stmt);
return SQLITE_LOCKED;
}
if(rc == SQLITE_ROW) {
*id = sqlite3_column_int64(stmt, 0);
sqlite3_finalize(stmt);
return SQLITE_OK;
} else if(rc == SQLITE_DONE) {
sqlite3_finalize(stmt);
rc = db_prepare(db, &stmt,
"INSERT INTO url ('url') VALUES (?1)");
if(rc != SQLITE_OK)
return rc;
sqlite3_bind_text(stmt, 1, url, -1, SQLITE_STATIC);
rc = db_step(stmt);
if(rc == SQLITE_DONE) {
*id = sqlite3_last_insert_rowid(db);
rc = SQLITE_OK;
}
}
sqlite3_finalize(stmt);
return rc;
}
/**
*
*/
static void
kv_value_cb(void *opaque, prop_event_t event, ...)
{
kv_prop_bind_t *kpb = opaque;
va_list ap, apx;
// prop_t *p;
// rstr_t *key;
void *db;
sqlite3_stmt *stmt;
int rc;
va_start(ap, event);
switch(event) {
case PROP_DESTROYED:
prop_unsubscribe(va_arg(ap, prop_sub_t *));
break;
case PROP_SET_VOID:
case PROP_SET_RSTRING:
case PROP_SET_CSTRING:
case PROP_SET_INT:
case PROP_SET_FLOAT:
db = kvstore_get();
if(db == NULL)
break;
again:
if(db_begin(db))
break;
if(kpb->kpb_id == -1) {
rc = get_url(db, kpb->kpb_url, &kpb->kpb_id);
if(rc == SQLITE_LOCKED) {
db_rollback_deadlock(db);
goto again;
}
if(rc != SQLITE_OK) {
db_rollback(db);
kvstore_close(db);
return;
}
}
if(event == PROP_SET_VOID) {
rc = db_prepare(db, &stmt,
"DELETE FROM url_kv "
"WHERE url_id = ?1 "
"AND domain = ?4 "
"AND key = ?2");
} else {
rc = db_prepare(db, &stmt,
"INSERT OR REPLACE INTO url_kv "
"(url_id, domain, key, value) "
"VALUES "
"(?1, ?4, ?2, ?3)");
}
if(rc != SQLITE_OK) {
db_rollback(db);
kvstore_close(db);
return;
}
sqlite3_bind_int64(stmt, 1, kpb->kpb_id);
sqlite3_bind_int(stmt, 4, KVSTORE_DOMAIN_PROP);
va_copy(apx, ap);
switch(event) {
default:
break;
case PROP_SET_VOID:
break;
case PROP_SET_RSTRING:
db_bind_rstr(stmt, 3, va_arg(apx, rstr_t *));
break;
case PROP_SET_CSTRING:
sqlite3_bind_text(stmt, 3, va_arg(apx, const char *), -1,
SQLITE_STATIC);
break;
case PROP_SET_INT:
sqlite3_bind_int(stmt, 3, va_arg(apx, int));
break;
case PROP_SET_FLOAT:
sqlite3_bind_double(stmt, 3, va_arg(apx, double));
break;
}
rstr_t *key = prop_get_name(va_arg(apx, prop_t *));
db_bind_rstr(stmt, 2, key);
rc = sqlite3_step(stmt);
sqlite3_finalize(stmt);
rstr_release(key);
if(rc == SQLITE_LOCKED) {
db_rollback_deadlock(db);
goto again;
}
db_commit(db);
kvstore_close(db);
break;
default:
break;
}
va_end(ap);
}
/**
*
*/
static void
kpb_destroy(kv_prop_bind_t *kpb)
{
prop_unsubscribe(kpb->kpb_sub);
free(kpb->kpb_url);
free(kpb);
}
/**
*
*/
static void
kv_cb(void *opaque, prop_event_t event, ...)
{
kv_prop_bind_t *kpb = opaque;
va_list ap;
prop_t *p;
prop_vec_t *pv;
int i;
va_start(ap, event);
switch(event) {
case PROP_ADD_CHILD:
case PROP_ADD_CHILD_BEFORE:
p = va_arg(ap, prop_t *);
prop_subscribe(PROP_SUB_TRACK_DESTROY,
PROP_TAG_CALLBACK, kv_value_cb, kpb,
PROP_TAG_ROOT, p,
NULL);
break;
case PROP_ADD_CHILD_VECTOR_DIRECT:
pv = va_arg(ap, prop_vec_t *);
for(i = 0; i < prop_vec_len(pv); i++)
prop_subscribe(PROP_SUB_TRACK_DESTROY | PROP_SUB_NO_INITIAL_UPDATE |
PROP_SUB_DONTLOCK,
PROP_TAG_CALLBACK, kv_value_cb, kpb,
PROP_TAG_ROOT, prop_vec_get(pv, i),
NULL);
break;
case PROP_DEL_CHILD:
case PROP_MOVE_CHILD:
case PROP_SET_VOID:
case PROP_SET_DIR:
case PROP_REQ_DELETE_VECTOR:
case PROP_HAVE_MORE_CHILDS_YES:
case PROP_HAVE_MORE_CHILDS_NO:
case PROP_WANT_MORE_CHILDS:
break;
case PROP_DESTROYED:
kpb_destroy(kpb);
break;
default:
printf("Cant handle event %d\n", event);
abort();
}
}
/**
*
*/
void
kv_prop_bind_create(prop_t *p, const char *url)
{
void *db;
int64_t id = -1;
sqlite3_stmt *stmt;
int rc;
db = kvstore_get();
if(db == NULL)
return;
rc = db_prepare(db, &stmt,
"SELECT id,key,value "
"FROM url "
"LEFT OUTER JOIN url_kv ON id = url_id "
"WHERE url=?1 "
"AND domain=?2");
if(rc != SQLITE_OK) {
kvstore_close(db);
return;
}
sqlite3_bind_text(stmt, 1, url, -1, SQLITE_STATIC);
sqlite3_bind_int(stmt, 2, KVSTORE_DOMAIN_PROP);
while(db_step(stmt) == SQLITE_ROW) {
if(id == -1)
id = sqlite3_column_int64(stmt, 0);
if(sqlite3_column_type(stmt, 1) != SQLITE_TEXT)
continue;
prop_t *c = prop_create(p, (const char *)sqlite3_column_text(stmt, 1));
switch(sqlite3_column_type(stmt, 2)) {
case SQLITE_TEXT:
prop_set_string(c, (const char *)sqlite3_column_text(stmt, 2));
break;
case SQLITE_INTEGER:
prop_set_int(c, sqlite3_column_int(stmt, 2));
break;
case SQLITE_FLOAT:
prop_set_float(c, sqlite3_column_double(stmt, 2));
break;
default:
prop_set_void(c);
break;
}
}
sqlite3_finalize(stmt);
kvstore_close(db);
kv_prop_bind_t *kpb = calloc(1, sizeof(kv_prop_bind_t));
kpb->kpb_id = id;
kpb->kpb_url = strdup(url);
kpb->kpb_sub =
prop_subscribe(PROP_SUB_TRACK_DESTROY | PROP_SUB_DIRECT_UPDATE,
PROP_TAG_CALLBACK, kv_cb, kpb,
PROP_TAG_ROOT, p,
NULL);
}
/**
*
*/
static sqlite3_stmt *
kv_url_opt_get(void *db, const char *url, int domain, const char *key)
{
sqlite3_stmt *stmt;
int rc;
if(db == NULL)
return NULL;
rc = db_prepare(db, &stmt,
"SELECT value "
"FROM url, url_kv "
"WHERE url=?1 "
"AND key = ?2 "
"AND domain = ?3 "
"AND url.id = url_id"
);
if(rc != SQLITE_OK) {
return NULL;
}
sqlite3_bind_text(stmt, 1, url, -1, SQLITE_STATIC);
sqlite3_bind_text(stmt, 2, key, -1, SQLITE_STATIC);
sqlite3_bind_int(stmt, 3, domain);
if(db_step(stmt) == SQLITE_ROW)
return stmt;
sqlite3_finalize(stmt);
return NULL;
}
/**
*
*/
rstr_t *
kv_url_opt_get_rstr(const char *url, int domain, const char *key)
{
void *db = kvstore_get();
sqlite3_stmt *stmt = kv_url_opt_get(db, url, domain, key);
rstr_t *r = NULL;
if(stmt) {
r = db_rstr(stmt, 0);
sqlite3_finalize(stmt);
}
kvstore_close(db);
return r;
}
/**
*
*/
int
kv_url_opt_get_int(const char *url, int domain, const char *key, int def)
{
void *db = kvstore_get();
sqlite3_stmt *stmt = kv_url_opt_get(db, url, domain, key);
int v = def;
if(stmt) {
v = sqlite3_column_int(stmt, 0);
sqlite3_finalize(stmt);
}
kvstore_close(db);
return v;
}
/**
*
*/
int64_t
kv_url_opt_get_int64(const char *url, int domain, const char *key, int64_t def)
{
void *db = kvstore_get();
sqlite3_stmt *stmt = kv_url_opt_get(db, url, domain, key);
int64_t v = def;
if(stmt) {
v = sqlite3_column_int64(stmt, 0);
sqlite3_finalize(stmt);
}
kvstore_close(db);
return v;
}
/**
*
*/
void
kv_url_opt_set(const char *url, int domain, const char *key,
int type, ...)
{
void *db;
sqlite3_stmt *stmt;
int rc;
uint64_t id;
const char *str;
va_list ap, apx;
va_start(ap, type);
db = kvstore_get();
if(db == NULL)
return;
again:
if(db_begin(db)) {
kvstore_close(db);
return;
}
rc = get_url(db, url, &id);
if(rc == SQLITE_LOCKED) {
db_rollback_deadlock(db);
goto again;
}
if(rc != SQLITE_OK) {
db_rollback(db);
kvstore_close(db);
return;
}
rc = db_prepare(db, &stmt,
"INSERT OR REPLACE INTO url_kv "
"(url_id, key, value, domain) "
"VALUES "
"(?1, ?2, ?3, ?4)"
);
if(rc != SQLITE_OK) {
db_rollback(db);
kvstore_close(db);
return;
}
sqlite3_bind_int64(stmt, 1, id);
sqlite3_bind_text(stmt, 2, key, -1, SQLITE_STATIC);
sqlite3_bind_int(stmt, 4, domain);
va_copy(apx, ap);
switch(type) {
case KVSTORE_SET_INT:
sqlite3_bind_int(stmt, 3, va_arg(apx, int));
break;
case KVSTORE_SET_INT64:
sqlite3_bind_int64(stmt, 3, va_arg(apx, int64_t));
break;
case KVSTORE_SET_STRING:
str = va_arg(apx, const char *);
if(str != NULL) {
sqlite3_bind_text(stmt, 3, str, -1, SQLITE_STATIC);
break;
}
// FALLTHRU
case KVSTORE_SET_VOID:
sqlite3_bind_null(stmt, 3);
break;
default:
break;
}
rc = sqlite3_step(stmt);
sqlite3_finalize(stmt);
if(rc == SQLITE_LOCKED) {
db_rollback_deadlock(db);
goto again;
}
db_commit(db);
kvstore_close(db);
}
/**
*
*/
void
kvstore_deferred_flush(void)
{
kvstore_deferred_write_t *kdw;
void *db;
sqlite3_stmt *stmt;
int rc;
uint64_t id = 0;
const char *current_url;
db = kvstore_get();
if(db == NULL)
return;
hts_mutex_lock(&deferred_mutex);
again:
if(db_begin(db))
goto err;
current_url = NULL;
LIST_FOREACH(kdw, &deferred_writes, kdw_link) {
if(current_url == NULL || strcmp(kdw->kdw_url, current_url)) {
rc = get_url(db, kdw->kdw_url, &id);
if(rc == SQLITE_LOCKED) {
db_rollback_deadlock(db);
goto again;
}
if(rc != SQLITE_OK) {
db_rollback(db);
goto err;
}
current_url = kdw->kdw_url;
}
rc = db_prepare(db, &stmt,
"INSERT OR REPLACE INTO url_kv "
"(url_id, key, value, domain) "
"VALUES "
"(?1, ?2, ?3, ?4)"
);
if(rc != SQLITE_OK) {
db_rollback(db);
goto err;
}
sqlite3_bind_int64(stmt, 1, id);
sqlite3_bind_text(stmt, 2, kdw->kdw_key, -1, SQLITE_STATIC);
sqlite3_bind_int(stmt, 4, kdw->kdw_domain);
switch(kdw->kdw_type) {
case KVSTORE_SET_INT:
sqlite3_bind_int(stmt, 3, kdw->kdw_int);
break;
case KVSTORE_SET_INT64:
sqlite3_bind_int(stmt, 3, kdw->kdw_int64);
break;
case KVSTORE_SET_STRING:
sqlite3_bind_text(stmt, 3, kdw->kdw_string, -1, SQLITE_STATIC);
break;
case KVSTORE_SET_VOID:
sqlite3_bind_null(stmt, 3);
break;
default:
break;
}
rc = sqlite3_step(stmt);
sqlite3_finalize(stmt);
if(rc == SQLITE_LOCKED) {
db_rollback_deadlock(db);
goto again;
}
}
db_commit(db);
err:
while((kdw = LIST_FIRST(&deferred_writes)) != NULL) {
LIST_REMOVE(kdw, kdw_link);
free(kdw->kdw_url);
free(kdw->kdw_key);
if(kdw->kdw_type == KVSTORE_SET_STRING)
free(kdw->kdw_string);
free(kdw);
}
hts_mutex_unlock(&deferred_mutex);
kvstore_close(db);
}
/**
*
*/
static void
deferred_callout_fire(struct callout *c, void *opaque)
{
kvstore_deferred_flush();
}
/**
*
*/
void
kv_url_opt_set_deferred(const char *url, int domain, const char *key,
int type, ...)
{
kvstore_deferred_write_t *kdw;
va_list ap;
const char *str;
va_start(ap, type);
hts_mutex_lock(&deferred_mutex);
LIST_FOREACH(kdw, &deferred_writes, kdw_link) {
if(!strcmp(kdw->kdw_url, url) &&
!strcmp(kdw->kdw_key, key) &&
kdw->kdw_domain == domain)
break;
}
if(kdw == NULL) {
kdw = malloc(sizeof(kvstore_deferred_write_t));
kdw->kdw_url = strdup(url);
kdw->kdw_key = strdup(key);
kdw->kdw_domain = domain;
LIST_INSERT_HEAD(&deferred_writes, kdw, kdw_link);
} else {
if(kdw->kdw_type == KVSTORE_SET_STRING)
free(kdw->kdw_string);
}
kdw->kdw_type = type;
switch(type) {
case KVSTORE_SET_INT:
kdw->kdw_int = va_arg(ap, int);
break;
case KVSTORE_SET_INT64:
kdw->kdw_int64 = va_arg(ap, int64_t);
break;
case KVSTORE_SET_STRING:
str = va_arg(ap, const char *);
if(str != NULL) {
kdw->kdw_string = strdup(str);
} else {
kdw->kdw_type = KVSTORE_SET_VOID;
}
break;
default:
break;
}
hts_mutex_unlock(&deferred_mutex);
callout_arm(&deferred_callout, deferred_callout_fire, NULL, 5);
va_end(ap);
}