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cache_sqlite.c
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cache_sqlite.c
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/******************************************************************************
* $Id$
*
* Project: MapServer
* Purpose: MapCache tile caching support file: sqlite cache backend
* Author: Thomas Bonfort and the MapServer team.
*
******************************************************************************
* Copyright (c) 1996-2011 Regents of the University of Minnesota.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies of this Software or works derived from this Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*****************************************************************************/
#include "mapcache.h"
#ifdef USE_SQLITE
#include <apr_strings.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <apr_reslist.h>
#include <apr_hash.h>
#ifdef APR_HAS_THREADS
#include <apr_thread_mutex.h>
#endif
#ifndef _WIN32
#include <unistd.h>
#endif
#include <sqlite3.h>
/**\class mapcache_cache_sqlite
* \brief a mapcache_cache on a filesytem
* \implements mapcache_cache
*/
typedef struct mapcache_cache_sqlite mapcache_cache_sqlite;
typedef struct mapcache_cache_sqlite_stmt mapcache_cache_sqlite_stmt;
struct mapcache_cache_sqlite_stmt {
char *sql;
};
struct sqlite_conn;
struct mapcache_cache_sqlite {
mapcache_cache cache;
char *dbfile;
mapcache_cache_sqlite_stmt create_stmt;
mapcache_cache_sqlite_stmt exists_stmt;
mapcache_cache_sqlite_stmt get_stmt;
mapcache_cache_sqlite_stmt set_stmt;
mapcache_cache_sqlite_stmt delete_stmt;
apr_table_t *pragmas;
void (*bind_stmt)(mapcache_context *ctx, void *stmt, mapcache_cache_sqlite *cache, mapcache_tile *tile);
int n_prepared_statements;
int detect_blank;
char *x_fmt,*y_fmt,*z_fmt,*inv_x_fmt,*inv_y_fmt,*div_x_fmt,*div_y_fmt,*inv_div_x_fmt,*inv_div_y_fmt;
int count_x, count_y;
};
struct sqlite_conn_params {
mapcache_cache_sqlite *cache;
char *dbfile;
int readonly;
};
struct sqlite_conn {
sqlite3 *handle;
int nstatements;
sqlite3_stmt **prepared_statements;
};
#define SQLITE_CONN(pooled_connection) ((struct sqlite_conn*)((pooled_connection)->connection))
#define HAS_TILE_STMT_IDX 0
#define GET_TILE_STMT_IDX 1
#define SQLITE_SET_TILE_STMT_IDX 2
#define SQLITE_DEL_TILE_STMT_IDX 3
#define MBTILES_SET_EMPTY_TILE_STMT1_IDX 2
#define MBTILES_SET_EMPTY_TILE_STMT2_IDX 3
#define MBTILES_SET_TILE_STMT1_IDX 4
#define MBTILES_SET_TILE_STMT2_IDX 5
#define MBTILES_DEL_TILE_SELECT_STMT_IDX 6
#define MBTILES_DEL_TILE_STMT1_IDX 7
#define MBTILES_DEL_TILE_STMT2_IDX 8
static void _mapcache_cache_sqlite_filename_for_tile(mapcache_context *ctx, mapcache_cache_sqlite *dcache, mapcache_tile *tile, char **path);
static void _sqlite_set_pragmas(mapcache_context *ctx, mapcache_cache_sqlite* cache, struct sqlite_conn *conn)
{
if (cache->pragmas && !apr_is_empty_table(cache->pragmas)) {
const apr_array_header_t *elts = apr_table_elts(cache->pragmas);
/* FIXME dynamically allocate this string */
int i,ret;
char *pragma_stmt;
for (i = 0; i < elts->nelts; i++) {
apr_table_entry_t entry = APR_ARRAY_IDX(elts, i, apr_table_entry_t);
pragma_stmt = apr_psprintf(ctx->pool,"PRAGMA %s=%s",entry.key,entry.val);
do {
ret = sqlite3_exec(conn->handle, pragma_stmt, 0, 0, NULL);
if (ret != SQLITE_OK && ret != SQLITE_BUSY && ret != SQLITE_LOCKED) {
break;
}
} while (ret == SQLITE_BUSY || ret == SQLITE_LOCKED);
if (ret != SQLITE_OK) {
ctx->set_error(ctx, 500, "failed to execute pragma statement %s",pragma_stmt);
return;
}
}
}
return;
}
static void mapcache_sqlite_release_conn(mapcache_context *ctx, mapcache_pooled_connection *conn) {
mapcache_connection_pool_release_connection(ctx,conn);
}
void mapcache_sqlite_connection_constructor(mapcache_context *ctx, void **conn_, void *params)
{
int ret;
int flags;
struct sqlite_conn_params *sq_params = (struct sqlite_conn_params*)params;
struct sqlite_conn *conn = calloc(1, sizeof (struct sqlite_conn));
*conn_ = conn;
if(sq_params->readonly) {
flags = SQLITE_OPEN_READONLY | SQLITE_OPEN_NOMUTEX;
} else {
flags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_NOMUTEX | SQLITE_OPEN_CREATE;
mapcache_make_parent_dirs(ctx,sq_params->dbfile);
GC_CHECK_ERROR(ctx);
}
ret = sqlite3_open_v2(sq_params->dbfile, &conn->handle, flags, NULL);
if (ret != SQLITE_OK) {
ctx->set_error(ctx,500,"sqlite backend failed to open db %s: %s", sq_params->dbfile, sqlite3_errmsg(conn->handle));
return;
}
sqlite3_busy_timeout(conn->handle, 300000);
do {
ret = sqlite3_exec(conn->handle, sq_params->cache->create_stmt.sql, 0, 0, NULL);
if (ret != SQLITE_OK && ret != SQLITE_BUSY && ret != SQLITE_LOCKED) {
break;
}
} while (ret == SQLITE_BUSY || ret == SQLITE_LOCKED);
if (ret != SQLITE_OK) {
ctx->set_error(ctx,500, "sqlite backend failed to create db schema on %s: %s", sq_params->dbfile, sqlite3_errmsg(conn->handle));
sqlite3_close(conn->handle);
return;
}
_sqlite_set_pragmas(ctx, sq_params->cache, conn);
if(GC_HAS_ERROR(ctx)) {
sqlite3_close(conn->handle);
return;
}
conn->prepared_statements = calloc(sq_params->cache->n_prepared_statements,sizeof(sqlite3_stmt*));
conn->nstatements = sq_params->cache->n_prepared_statements;
}
void mapcache_sqlite_connection_destructor(void *conn_)
{
struct sqlite_conn *conn = (struct sqlite_conn*) conn_;
int i;
for(i=0; i<conn->nstatements; i++) {
if(conn->prepared_statements[i]) {
sqlite3_finalize(conn->prepared_statements[i]);
}
}
free(conn->prepared_statements);
sqlite3_close(conn->handle);
}
static mapcache_pooled_connection* mapcache_sqlite_get_conn(mapcache_context *ctx, mapcache_cache_sqlite *cache, mapcache_tile *tile, int readonly) {
struct sqlite_conn_params params;
mapcache_pooled_connection *pc;
char *key;
_mapcache_cache_sqlite_filename_for_tile(ctx,cache,tile,¶ms.dbfile);
params.cache = cache;
params.readonly = readonly;
if(!strstr(cache->dbfile,"{")) {
key = apr_pstrcat(ctx->pool,readonly?"ro_":"rw_",cache->cache.name,NULL);
} else {
key = apr_pstrcat(ctx->pool,readonly?"ro_":"rw_",params.dbfile,NULL);
}
pc = mapcache_connection_pool_get_connection(ctx,key,mapcache_sqlite_connection_constructor,mapcache_sqlite_connection_destructor,¶ms);
return pc;
}
/**
* \brief return sqlite db filename for given tile
*
* \param tile the tile to get the key from
* \param path pointer to a char* that will contain the filename
* \param r
* \private \memberof mapcache_cache_sqlite
*/
static void _mapcache_cache_sqlite_filename_for_tile(mapcache_context *ctx, mapcache_cache_sqlite *dcache, mapcache_tile *tile, char **path)
{
*path = dcache->dbfile;
if(strstr(*path,"{")) {
/*
* generic template substitutions
*/
if(strstr(*path,"{tileset}"))
*path = mapcache_util_str_replace(ctx->pool,*path, "{tileset}",
tile->tileset->name);
if(strstr(*path,"{grid}"))
*path = mapcache_util_str_replace(ctx->pool,*path, "{grid}",
tile->grid_link->grid->name);
if(tile->dimensions && strstr(*path,"{dim")) {
char *dimstring="";
int i = tile->dimensions->nelts;
while(i--) {
mapcache_requested_dimension *entry = APR_ARRAY_IDX(tile->dimensions,i,mapcache_requested_dimension*);
const char *dimval = mapcache_util_str_sanitize(ctx->pool,entry->cached_value,"/.",'#');
char *single_dim = apr_pstrcat(ctx->pool,"{dim:",entry->dimension->name,"}",NULL);
dimstring = apr_pstrcat(ctx->pool,dimstring,"#",dimval,NULL);
if(strstr(*path,single_dim)) {
*path = mapcache_util_str_replace(ctx->pool,*path, single_dim, dimval);
}
}
*path = mapcache_util_str_replace(ctx->pool,*path, "{dim}", dimstring);
}
while(strstr(*path,"{z}"))
*path = mapcache_util_str_replace(ctx->pool,*path, "{z}",
apr_psprintf(ctx->pool,dcache->z_fmt,tile->z));
if(dcache->count_x > 0) {
while(strstr(*path,"{div_x}"))
*path = mapcache_util_str_replace(ctx->pool,*path, "{div_x}",
apr_psprintf(ctx->pool,dcache->div_x_fmt,tile->x/dcache->count_x));
while(strstr(*path,"{inv_div_x}"))
*path = mapcache_util_str_replace(ctx->pool,*path, "{inv_div_x}",
apr_psprintf(ctx->pool,dcache->inv_div_x_fmt,(tile->grid_link->grid->levels[tile->z]->maxx - tile->x - 1)/dcache->count_x));
while(strstr(*path,"{x}"))
*path = mapcache_util_str_replace(ctx->pool,*path, "{x}",
apr_psprintf(ctx->pool,dcache->x_fmt,tile->x/dcache->count_x*dcache->count_x));
while(strstr(*path,"{inv_x}"))
*path = mapcache_util_str_replace(ctx->pool,*path, "{inv_x}",
apr_psprintf(ctx->pool,dcache->inv_x_fmt,(tile->grid_link->grid->levels[tile->z]->maxx - tile->x - 1)/dcache->count_x*dcache->count_x));
}
if(dcache->count_y > 0) {
while(strstr(*path,"{div_y}"))
*path = mapcache_util_str_replace(ctx->pool,*path, "{div_y}",
apr_psprintf(ctx->pool,dcache->div_y_fmt,tile->y/dcache->count_y));
while(strstr(*path,"{inv_div_y}"))
*path = mapcache_util_str_replace(ctx->pool,*path, "{inv_div_y}",
apr_psprintf(ctx->pool,dcache->inv_div_y_fmt,(tile->grid_link->grid->levels[tile->z]->maxy - tile->y - 1)/dcache->count_y));
while(strstr(*path,"{y}"))
*path = mapcache_util_str_replace(ctx->pool,*path, "{y}",
apr_psprintf(ctx->pool,dcache->y_fmt,tile->y/dcache->count_y*dcache->count_y));
while(strstr(*path,"{inv_y}"))
*path = mapcache_util_str_replace(ctx->pool,*path, "{inv_y}",
apr_psprintf(ctx->pool,dcache->inv_y_fmt,(tile->grid_link->grid->levels[tile->z]->maxy - tile->y - 1)/dcache->count_y*dcache->count_y));
}
}
if(!*path) {
ctx->set_error(ctx,500, "failed to allocate tile key");
}
}
/**
* \brief apply appropriate tile properties to the sqlite statement */
static void _bind_sqlite_params(mapcache_context *ctx, void *vstmt, mapcache_cache_sqlite *cache, mapcache_tile *tile)
{
sqlite3_stmt *stmt = vstmt;
int paramidx;
/* tile->x */
paramidx = sqlite3_bind_parameter_index(stmt, ":x");
if (paramidx) sqlite3_bind_int(stmt, paramidx, tile->x);
paramidx = sqlite3_bind_parameter_index(stmt, ":inv_x");
if (paramidx)
sqlite3_bind_int(stmt, paramidx, tile->grid_link->grid->levels[tile->z]->maxx - tile->x - 1);
/* tile->y */
paramidx = sqlite3_bind_parameter_index(stmt, ":y");
if (paramidx) sqlite3_bind_int(stmt, paramidx, tile->y);
paramidx = sqlite3_bind_parameter_index(stmt, ":inv_y");
if (paramidx)
sqlite3_bind_int(stmt, paramidx, tile->grid_link->grid->levels[tile->z]->maxy - tile->y - 1);
/* tile->z */
paramidx = sqlite3_bind_parameter_index(stmt, ":z");
if (paramidx) sqlite3_bind_int(stmt, paramidx, tile->z);
/* eventual dimensions */
paramidx = sqlite3_bind_parameter_index(stmt, ":dim");
if (paramidx) {
if (tile->dimensions) {
char *dim = mapcache_util_get_tile_dimkey(ctx, tile, NULL, NULL);
sqlite3_bind_text(stmt, paramidx, dim, -1, SQLITE_STATIC);
} else {
sqlite3_bind_text(stmt, paramidx, "", -1, SQLITE_STATIC);
}
}
/* grid */
paramidx = sqlite3_bind_parameter_index(stmt, ":grid");
if (paramidx) sqlite3_bind_text(stmt, paramidx, tile->grid_link->grid->name, -1, SQLITE_STATIC);
/* tileset */
paramidx = sqlite3_bind_parameter_index(stmt, ":tileset");
if (paramidx) sqlite3_bind_text(stmt, paramidx, tile->tileset->name, -1, SQLITE_STATIC);
/* tile blob data */
paramidx = sqlite3_bind_parameter_index(stmt, ":data");
if (paramidx) {
int written = 0;
if(cache->detect_blank) {
if(!tile->raw_image) {
tile->raw_image = mapcache_imageio_decode(ctx, tile->encoded_data);
GC_CHECK_ERROR(ctx);
}
if(mapcache_image_blank_color(tile->raw_image) != MAPCACHE_FALSE) {
char *buf = apr_palloc(ctx->pool, 5* sizeof(char));
buf[0] = '#';
memcpy(buf+1,tile->raw_image->data,4);
written = 1;
sqlite3_bind_blob(stmt, paramidx, buf, 5, SQLITE_STATIC);
}
}
if(!written) {
if (!tile->encoded_data) {
tile->encoded_data = tile->tileset->format->write(ctx, tile->raw_image, tile->tileset->format);
GC_CHECK_ERROR(ctx);
}
if (tile->encoded_data && tile->encoded_data->size) {
sqlite3_bind_blob(stmt, paramidx, tile->encoded_data->buf, tile->encoded_data->size, SQLITE_STATIC);
} else {
sqlite3_bind_text(stmt, paramidx, "", -1, SQLITE_STATIC);
}
}
}
}
static void _bind_mbtiles_params(mapcache_context *ctx, void *vstmt, mapcache_cache_sqlite *cache, mapcache_tile *tile)
{
sqlite3_stmt *stmt = vstmt;
int paramidx;
paramidx = sqlite3_bind_parameter_index(stmt, ":x");
if (paramidx) sqlite3_bind_int(stmt, paramidx, tile->x);
/* tile->y */
paramidx = sqlite3_bind_parameter_index(stmt, ":y");
if (paramidx) sqlite3_bind_int(stmt, paramidx, tile->y);
/* tile->y */
paramidx = sqlite3_bind_parameter_index(stmt, ":z");
if (paramidx) sqlite3_bind_int(stmt, paramidx, tile->z);
/* mbtiles foreign key */
paramidx = sqlite3_bind_parameter_index(stmt, ":key");
if (paramidx) {
char *key = apr_psprintf(ctx->pool,"%d-%d-%d",tile->x,tile->y,tile->z);
sqlite3_bind_text(stmt, paramidx, key, -1, SQLITE_STATIC);
}
paramidx = sqlite3_bind_parameter_index(stmt, ":color");
if (paramidx) {
char *key;
assert(tile->raw_image);
key = apr_psprintf(ctx->pool,"#%02x%02x%02x%02x",
tile->raw_image->data[0],
tile->raw_image->data[1],
tile->raw_image->data[2],
tile->raw_image->data[3]);
sqlite3_bind_text(stmt, paramidx, key, -1, SQLITE_STATIC);
}
/* tile blob data */
paramidx = sqlite3_bind_parameter_index(stmt, ":data");
if (paramidx) {
if (!tile->encoded_data) {
tile->encoded_data = tile->tileset->format->write(ctx, tile->raw_image, tile->tileset->format);
GC_CHECK_ERROR(ctx);
}
if (tile->encoded_data && tile->encoded_data->size) {
sqlite3_bind_blob(stmt, paramidx, tile->encoded_data->buf, tile->encoded_data->size, SQLITE_STATIC);
} else {
sqlite3_bind_text(stmt, paramidx, "", -1, SQLITE_STATIC);
}
}
}
static int _mapcache_cache_sqlite_has_tile(mapcache_context *ctx, mapcache_cache *pcache, mapcache_tile *tile)
{
mapcache_cache_sqlite *cache = (mapcache_cache_sqlite*) pcache;
mapcache_pooled_connection *pc;
struct sqlite_conn *conn;
sqlite3_stmt *stmt;
int ret;
pc = mapcache_sqlite_get_conn(ctx,cache,tile,1);
if (GC_HAS_ERROR(ctx)) {
if(pc) mapcache_sqlite_release_conn(ctx, pc);
if(!tile->tileset->read_only && tile->tileset->source) {
/* not an error in this case, as the db file may not have been created yet */
ctx->clear_errors(ctx);
}
return MAPCACHE_FALSE;
}
conn = SQLITE_CONN(pc);
stmt = conn->prepared_statements[HAS_TILE_STMT_IDX];
if(!stmt) {
sqlite3_prepare(conn->handle, cache->exists_stmt.sql, -1, &conn->prepared_statements[HAS_TILE_STMT_IDX], NULL);
stmt = conn->prepared_statements[HAS_TILE_STMT_IDX];
}
cache->bind_stmt(ctx, stmt, cache, tile);
ret = sqlite3_step(stmt);
if (ret != SQLITE_DONE && ret != SQLITE_ROW) {
ctx->set_error(ctx, 500, "sqlite backend failed on has_tile: %s", sqlite3_errmsg(conn->handle));
}
if (ret == SQLITE_DONE) {
ret = MAPCACHE_FALSE;
} else if (ret == SQLITE_ROW) {
ret = MAPCACHE_TRUE;
}
sqlite3_reset(stmt);
mapcache_sqlite_release_conn(ctx, pc);
return ret;
}
static void _mapcache_cache_sqlite_delete(mapcache_context *ctx, mapcache_cache *pcache, mapcache_tile *tile)
{
mapcache_cache_sqlite *cache = (mapcache_cache_sqlite*) pcache;
mapcache_pooled_connection *pc;
struct sqlite_conn *conn;
sqlite3_stmt *stmt;
int ret;
pc = mapcache_sqlite_get_conn(ctx,cache,tile,0);
if (GC_HAS_ERROR(ctx)) {
mapcache_sqlite_release_conn(ctx, pc);
return;
}
conn = SQLITE_CONN(pc);
stmt = conn->prepared_statements[SQLITE_DEL_TILE_STMT_IDX];
if(!stmt) {
sqlite3_prepare(conn->handle, cache->delete_stmt.sql, -1, &conn->prepared_statements[SQLITE_DEL_TILE_STMT_IDX], NULL);
stmt = conn->prepared_statements[SQLITE_DEL_TILE_STMT_IDX];
}
cache->bind_stmt(ctx, stmt, cache, tile);
ret = sqlite3_step(stmt);
if (ret != SQLITE_DONE && ret != SQLITE_ROW) {
ctx->set_error(ctx, 500, "sqlite backend failed on delete: %s", sqlite3_errmsg(conn->handle));
}
sqlite3_reset(stmt);
mapcache_sqlite_release_conn(ctx, pc);
}
static void _mapcache_cache_mbtiles_delete(mapcache_context *ctx, mapcache_cache *pcache, mapcache_tile *tile)
{
mapcache_cache_sqlite *cache = (mapcache_cache_sqlite*) pcache;
mapcache_pooled_connection *pc;
struct sqlite_conn *conn;
sqlite3_stmt *stmt1,*stmt2,*stmt3;
int ret;
const char *tile_id;
size_t tile_id_size;
pc = mapcache_sqlite_get_conn(ctx,cache,tile,0);
if (GC_HAS_ERROR(ctx)) {
mapcache_sqlite_release_conn(ctx, pc);
return;
}
conn = SQLITE_CONN(pc);
stmt1 = conn->prepared_statements[MBTILES_DEL_TILE_SELECT_STMT_IDX];
stmt2 = conn->prepared_statements[MBTILES_DEL_TILE_STMT1_IDX];
stmt3 = conn->prepared_statements[MBTILES_DEL_TILE_STMT2_IDX];
if(!stmt1) {
sqlite3_prepare(conn->handle, "select tile_id from map where tile_col=:x and tile_row=:y and zoom_level=:z",-1,&conn->prepared_statements[MBTILES_DEL_TILE_SELECT_STMT_IDX], NULL);
sqlite3_prepare(conn->handle, "delete from map where tile_col=:x and tile_row=:y and zoom_level=:z", -1, &conn->prepared_statements[MBTILES_DEL_TILE_STMT1_IDX], NULL);
sqlite3_prepare(conn->handle, "delete from images where tile_id=:foobar", -1, &conn->prepared_statements[MBTILES_DEL_TILE_STMT2_IDX], NULL);
stmt1 = conn->prepared_statements[MBTILES_DEL_TILE_SELECT_STMT_IDX];
stmt2 = conn->prepared_statements[MBTILES_DEL_TILE_STMT1_IDX];
stmt3 = conn->prepared_statements[MBTILES_DEL_TILE_STMT2_IDX];
}
/* first extract tile_id from the tile we will delete. We need this because we do not know
* if the tile is empty or not.
* If it is empty, we will not delete the image blob data from the images table */
cache->bind_stmt(ctx, stmt1, cache, tile);
do {
ret = sqlite3_step(stmt1);
if (ret != SQLITE_DONE && ret != SQLITE_ROW && ret != SQLITE_BUSY && ret != SQLITE_LOCKED) {
ctx->set_error(ctx, 500, "sqlite backend failed on mbtile del 1: %s", sqlite3_errmsg(conn->handle));
sqlite3_reset(stmt1);
mapcache_sqlite_release_conn(ctx, pc);
return;
}
} while (ret == SQLITE_BUSY || ret == SQLITE_LOCKED);
if (ret == SQLITE_DONE) { /* tile does not exist, ignore */
sqlite3_reset(stmt1);
mapcache_sqlite_release_conn(ctx, pc);
return;
} else {
tile_id = (const char*) sqlite3_column_text(stmt1, 0);
tile_id_size = sqlite3_column_bytes(stmt1, 0);
}
/* delete the tile from the "map" table */
cache->bind_stmt(ctx,stmt2, cache, tile);
ret = sqlite3_step(stmt2);
if (ret != SQLITE_DONE && ret != SQLITE_ROW) {
ctx->set_error(ctx, 500, "sqlite backend failed on mbtile del 2: %s", sqlite3_errmsg(conn->handle));
sqlite3_reset(stmt1);
sqlite3_reset(stmt2);
mapcache_sqlite_release_conn(ctx, pc);
return;
}
if(tile_id[0] != '#') {
/* the tile isn't empty, we must also delete from the images table */
int paramidx = sqlite3_bind_parameter_index(stmt3, ":foobar");
if (paramidx) {
sqlite3_bind_text(stmt3, paramidx, tile_id, tile_id_size, SQLITE_STATIC);
}
ret = sqlite3_step(stmt3);
if (ret != SQLITE_DONE && ret != SQLITE_ROW) {
ctx->set_error(ctx, 500, "sqlite backend failed on mbtile del 3: %s", sqlite3_errmsg(conn->handle));
sqlite3_reset(stmt1);
sqlite3_reset(stmt2);
sqlite3_reset(stmt3);
mapcache_sqlite_release_conn(ctx, pc);
return;
}
}
sqlite3_reset(stmt1);
sqlite3_reset(stmt2);
sqlite3_reset(stmt3);
mapcache_sqlite_release_conn(ctx, pc);
}
static void _single_mbtile_set(mapcache_context *ctx, mapcache_cache_sqlite *cache, mapcache_tile *tile, struct sqlite_conn *conn)
{
sqlite3_stmt *stmt1,*stmt2;
int ret;
if(!tile->raw_image) {
tile->raw_image = mapcache_imageio_decode(ctx, tile->encoded_data);
GC_CHECK_ERROR(ctx);
}
if(mapcache_image_blank_color(tile->raw_image) != MAPCACHE_FALSE) {
stmt1 = conn->prepared_statements[MBTILES_SET_EMPTY_TILE_STMT1_IDX];
stmt2 = conn->prepared_statements[MBTILES_SET_EMPTY_TILE_STMT2_IDX];
if(!stmt1) {
sqlite3_prepare(conn->handle,
"insert or ignore into images(tile_id,tile_data) values (:color,:data);",
-1, &conn->prepared_statements[MBTILES_SET_EMPTY_TILE_STMT1_IDX], NULL);
sqlite3_prepare(conn->handle,
"insert or replace into map(tile_column,tile_row,zoom_level,tile_id) values (:x,:y,:z,:color);",
-1, &conn->prepared_statements[MBTILES_SET_EMPTY_TILE_STMT2_IDX], NULL);
stmt1 = conn->prepared_statements[MBTILES_SET_EMPTY_TILE_STMT1_IDX];
stmt2 = conn->prepared_statements[MBTILES_SET_EMPTY_TILE_STMT2_IDX];
}
cache->bind_stmt(ctx, stmt1, cache, tile);
cache->bind_stmt(ctx, stmt2, cache, tile);
} else {
stmt1 = conn->prepared_statements[MBTILES_SET_TILE_STMT1_IDX];
stmt2 = conn->prepared_statements[MBTILES_SET_TILE_STMT2_IDX];
if(!stmt1) {
sqlite3_prepare(conn->handle,
"insert or replace into images(tile_id,tile_data) values (:key,:data);",
-1, &conn->prepared_statements[MBTILES_SET_TILE_STMT1_IDX], NULL);
sqlite3_prepare(conn->handle,
"insert or replace into map(tile_column,tile_row,zoom_level,tile_id) values (:x,:y,:z,:key);",
-1, &conn->prepared_statements[MBTILES_SET_TILE_STMT2_IDX], NULL);
stmt1 = conn->prepared_statements[MBTILES_SET_TILE_STMT1_IDX];
stmt2 = conn->prepared_statements[MBTILES_SET_TILE_STMT2_IDX];
}
cache->bind_stmt(ctx, stmt1, cache, tile);
cache->bind_stmt(ctx, stmt2, cache, tile);
}
do {
ret = sqlite3_step(stmt1);
if (ret != SQLITE_DONE && ret != SQLITE_ROW && ret != SQLITE_BUSY && ret != SQLITE_LOCKED) {
ctx->set_error(ctx, 500, "mbtiles backend failed on image set: %s (%d)", sqlite3_errmsg(conn->handle), ret);
break;
}
if (ret == SQLITE_BUSY) {
sqlite3_reset(stmt1);
}
} while (ret == SQLITE_BUSY || ret == SQLITE_LOCKED);
if(ret == SQLITE_DONE) {
do {
ret = sqlite3_step(stmt2);
if (ret != SQLITE_DONE && ret != SQLITE_ROW && ret != SQLITE_BUSY && ret != SQLITE_LOCKED) {
ctx->set_error(ctx, 500, "mbtiles backend failed on map set: %s (%d)", sqlite3_errmsg(conn->handle), ret);
break;
}
if (ret == SQLITE_BUSY) {
sqlite3_reset(stmt2);
}
} while (ret == SQLITE_BUSY || ret == SQLITE_LOCKED);
}
sqlite3_reset(stmt1);
sqlite3_reset(stmt2);
}
static int _mapcache_cache_sqlite_get(mapcache_context *ctx, mapcache_cache *pcache, mapcache_tile *tile)
{
mapcache_cache_sqlite *cache = (mapcache_cache_sqlite*) pcache;
struct sqlite_conn *conn;
sqlite3_stmt *stmt;
int ret;
mapcache_pooled_connection *pc = mapcache_sqlite_get_conn(ctx,cache,tile,1);
if (GC_HAS_ERROR(ctx)) {
if(tile->tileset->read_only || !tile->tileset->source) {
mapcache_sqlite_release_conn(ctx, pc);
return MAPCACHE_FAILURE;
} else {
/* not an error in this case, as the db file may not have been created yet */
ctx->clear_errors(ctx);
mapcache_sqlite_release_conn(ctx, pc);
return MAPCACHE_CACHE_MISS;
}
}
conn = SQLITE_CONN(pc);
stmt = conn->prepared_statements[GET_TILE_STMT_IDX];
if(!stmt) {
sqlite3_prepare(conn->handle, cache->get_stmt.sql, -1, &conn->prepared_statements[GET_TILE_STMT_IDX], NULL);
stmt = conn->prepared_statements[GET_TILE_STMT_IDX];
}
cache->bind_stmt(ctx, stmt, cache, tile);
do {
ret = sqlite3_step(stmt);
if (ret != SQLITE_DONE && ret != SQLITE_ROW && ret != SQLITE_BUSY && ret != SQLITE_LOCKED) {
ctx->set_error(ctx, 500, "sqlite backend failed on get: %s", sqlite3_errmsg(conn->handle));
sqlite3_reset(stmt);
mapcache_sqlite_release_conn(ctx, pc);
return MAPCACHE_FAILURE;
}
} while (ret == SQLITE_BUSY || ret == SQLITE_LOCKED);
if (ret == SQLITE_DONE) {
sqlite3_reset(stmt);
mapcache_sqlite_release_conn(ctx, pc);
return MAPCACHE_CACHE_MISS;
} else {
const void *blob = sqlite3_column_blob(stmt, 0);
int size = sqlite3_column_bytes(stmt, 0);
if(size>0 && ((char*)blob)[0] == '#') {
tile->encoded_data = mapcache_empty_png_decode(ctx,tile->grid_link->grid->tile_sx, tile->grid_link->grid->tile_sy ,blob,&tile->nodata);
} else {
tile->encoded_data = mapcache_buffer_create(size, ctx->pool);
memcpy(tile->encoded_data->buf, blob, size);
tile->encoded_data->size = size;
}
if (sqlite3_column_count(stmt) > 1) {
time_t mtime = sqlite3_column_int64(stmt, 1);
apr_time_ansi_put(&(tile->mtime), mtime);
}
sqlite3_reset(stmt);
mapcache_sqlite_release_conn(ctx, pc);
return MAPCACHE_SUCCESS;
}
}
static void _single_sqlitetile_set(mapcache_context *ctx, mapcache_cache_sqlite *cache, mapcache_tile *tile, struct sqlite_conn *conn)
{
sqlite3_stmt *stmt = conn->prepared_statements[SQLITE_SET_TILE_STMT_IDX];
int ret;
if(!stmt) {
sqlite3_prepare(conn->handle, cache->set_stmt.sql, -1, &conn->prepared_statements[SQLITE_SET_TILE_STMT_IDX], NULL);
stmt = conn->prepared_statements[SQLITE_SET_TILE_STMT_IDX];
}
cache->bind_stmt(ctx, stmt, cache, tile);
do {
ret = sqlite3_step(stmt);
if (ret != SQLITE_DONE && ret != SQLITE_ROW && ret != SQLITE_BUSY && ret != SQLITE_LOCKED) {
ctx->set_error(ctx, 500, "sqlite backend failed on set: %s (%d)", sqlite3_errmsg(conn->handle), ret);
break;
}
if (ret == SQLITE_BUSY) {
sqlite3_reset(stmt);
}
} while (ret == SQLITE_BUSY || ret == SQLITE_LOCKED);
sqlite3_reset(stmt);
}
static void _mapcache_cache_sqlite_set(mapcache_context *ctx, mapcache_cache *pcache, mapcache_tile *tile)
{
mapcache_cache_sqlite *cache = (mapcache_cache_sqlite*)pcache;
struct sqlite_conn *conn;
mapcache_pooled_connection *pc = mapcache_sqlite_get_conn(ctx,cache,tile,0);
if (GC_HAS_ERROR(ctx)) {
mapcache_sqlite_release_conn(ctx, pc);
return;
}
conn = SQLITE_CONN(pc);
sqlite3_exec(conn->handle, "BEGIN TRANSACTION", 0, 0, 0);
_single_sqlitetile_set(ctx,cache, tile,conn);
if (GC_HAS_ERROR(ctx)) {
sqlite3_exec(conn->handle, "ROLLBACK TRANSACTION", 0, 0, 0);
} else {
sqlite3_exec(conn->handle, "END TRANSACTION", 0, 0, 0);
}
mapcache_sqlite_release_conn(ctx, pc);
}
static void _mapcache_cache_sqlite_multi_set(mapcache_context *ctx, mapcache_cache *pcache, mapcache_tile *tiles, int ntiles)
{
mapcache_cache_sqlite *cache = (mapcache_cache_sqlite*)pcache;
int i;
struct sqlite_conn *conn;
mapcache_pooled_connection *pc = mapcache_sqlite_get_conn(ctx,cache,&tiles[0],0);
if (GC_HAS_ERROR(ctx)) {
mapcache_sqlite_release_conn(ctx, pc);
return;
}
conn = SQLITE_CONN(pc);
sqlite3_exec(conn->handle, "BEGIN TRANSACTION", 0, 0, 0);
for (i = 0; i < ntiles; i++) {
mapcache_tile *tile = &tiles[i];
_single_sqlitetile_set(ctx,cache, tile,conn);
if(GC_HAS_ERROR(ctx)) break;
}
if (GC_HAS_ERROR(ctx)) {
sqlite3_exec(conn->handle, "ROLLBACK TRANSACTION", 0, 0, 0);
} else {
sqlite3_exec(conn->handle, "END TRANSACTION", 0, 0, 0);
}
mapcache_sqlite_release_conn(ctx, pc);
}
static void _mapcache_cache_mbtiles_set(mapcache_context *ctx, mapcache_cache *pcache, mapcache_tile *tile)
{
mapcache_cache_sqlite *cache = (mapcache_cache_sqlite*)pcache;
struct sqlite_conn *conn;
mapcache_pooled_connection *pc = mapcache_sqlite_get_conn(ctx,cache,tile,0);
if (GC_HAS_ERROR(ctx)) {
mapcache_sqlite_release_conn(ctx, pc);
return;
}
conn = SQLITE_CONN(pc);
if(!tile->raw_image) {
tile->raw_image = mapcache_imageio_decode(ctx, tile->encoded_data);
if(GC_HAS_ERROR(ctx)) {
mapcache_sqlite_release_conn(ctx, pc);
return;
}
}
sqlite3_exec(conn->handle, "BEGIN TRANSACTION", 0, 0, 0);
_single_mbtile_set(ctx, cache, tile,conn);
if (GC_HAS_ERROR(ctx)) {
sqlite3_exec(conn->handle, "ROLLBACK TRANSACTION", 0, 0, 0);
} else {
sqlite3_exec(conn->handle, "END TRANSACTION", 0, 0, 0);
}
mapcache_sqlite_release_conn(ctx, pc);
}
static void _mapcache_cache_mbtiles_multi_set(mapcache_context *ctx, mapcache_cache *pcache, mapcache_tile *tiles, int ntiles)
{
int i;
mapcache_cache_sqlite *cache = (mapcache_cache_sqlite*)pcache;
mapcache_pooled_connection *pc;
struct sqlite_conn *conn;
/* decode/encode image data before going into the sqlite write lock */
for (i = 0; i < ntiles; i++) {
mapcache_tile *tile = &tiles[i];
if(!tile->raw_image) {
tile->raw_image = mapcache_imageio_decode(ctx, tile->encoded_data);
GC_CHECK_ERROR(ctx);
}
/* only encode to image format if tile is not blank */
if (mapcache_image_blank_color(tile->raw_image) != MAPCACHE_TRUE && !tile->encoded_data) {
tile->encoded_data = tile->tileset->format->write(ctx, tile->raw_image, tile->tileset->format);
GC_CHECK_ERROR(ctx);
}
}
pc = mapcache_sqlite_get_conn(ctx,cache,&tiles[0],0);
if (GC_HAS_ERROR(ctx)) {
mapcache_sqlite_release_conn(ctx, pc);
return;
}
conn = SQLITE_CONN(pc);
sqlite3_exec(conn->handle, "BEGIN TRANSACTION", 0, 0, 0);
for (i = 0; i < ntiles; i++) {
mapcache_tile *tile = &tiles[i];
_single_mbtile_set(ctx,cache,tile,conn);
if(GC_HAS_ERROR(ctx)) break;
}
if (GC_HAS_ERROR(ctx)) {
sqlite3_exec(conn->handle, "ROLLBACK TRANSACTION", 0, 0, 0);
} else {
sqlite3_exec(conn->handle, "END TRANSACTION", 0, 0, 0);
}
mapcache_sqlite_release_conn(ctx, pc);
}
static void _mapcache_cache_sqlite_configuration_parse_xml(mapcache_context *ctx, ezxml_t node, mapcache_cache *pcache, mapcache_cfg *config)
{
ezxml_t cur_node;
mapcache_cache_sqlite *cache;
sqlite3_initialize();
sqlite3_config(SQLITE_CONFIG_MULTITHREAD);
cache = (mapcache_cache_sqlite*) pcache;
if ((cur_node = ezxml_child(node, "base")) != NULL) {
ctx->set_error(ctx, 500, "sqlite config <base> not supported anymore, use <dbfile>");
return;
}
if ((cur_node = ezxml_child(node, "dbname_template")) != NULL) {
ctx->set_error(ctx, 500, "sqlite config <dbname_template> not supported anymore, use a \"multi-sqlite3\" cache type");
return;
}
if ((cur_node = ezxml_child(node, "dbfile")) != NULL) {
char *fmt;
cache->dbfile = apr_pstrdup(ctx->pool, cur_node->txt);
fmt = (char*)ezxml_attr(cur_node,"x_fmt");
if(fmt && *fmt) {
cache->x_fmt = apr_pstrdup(ctx->pool,fmt);
}
fmt = (char*)ezxml_attr(cur_node,"y_fmt");
if(fmt && *fmt) {
cache->y_fmt = apr_pstrdup(ctx->pool,fmt);
}
fmt = (char*)ezxml_attr(cur_node,"z_fmt");
if(fmt && *fmt) {
cache->z_fmt = apr_pstrdup(ctx->pool,fmt);
}
fmt = (char*)ezxml_attr(cur_node,"inv_x_fmt");
if(fmt && *fmt) {
cache->inv_x_fmt = apr_pstrdup(ctx->pool,fmt);
}
fmt = (char*)ezxml_attr(cur_node,"inv_y_fmt");
if(fmt && *fmt) {
cache->inv_y_fmt = apr_pstrdup(ctx->pool,fmt);
}
fmt = (char*)ezxml_attr(cur_node,"div_x_fmt");
if(fmt && *fmt) {
cache->div_x_fmt = apr_pstrdup(ctx->pool,fmt);
}
fmt = (char*)ezxml_attr(cur_node,"div_y_fmt");
if(fmt && *fmt) {
cache->div_y_fmt = apr_pstrdup(ctx->pool,fmt);
}
fmt = (char*)ezxml_attr(cur_node,"inv_div_x_fmt");
if(fmt && *fmt) {
cache->inv_div_x_fmt = apr_pstrdup(ctx->pool,fmt);
}
fmt = (char*)ezxml_attr(cur_node,"inv_div_y_fmt");
if(fmt && *fmt) {
cache->inv_div_y_fmt = apr_pstrdup(ctx->pool,fmt);
}
}
cache->detect_blank = 0;
if ((cur_node = ezxml_child(node, "detect_blank")) != NULL) {
if(strcasecmp(cur_node->txt,"false")) {
cache->detect_blank = 1;
}
}
if ((cur_node = ezxml_child(node, "hitstats")) != NULL) {
if (!strcasecmp(cur_node->txt, "true")) {
ctx->set_error(ctx, 500, "sqlite config <hitstats> not supported anymore");
}
}
if ((cur_node = ezxml_child(node, "pragma")) != NULL) {
cache->pragmas = apr_table_make(ctx->pool,1);
while(cur_node) {
char *name = (char*)ezxml_attr(cur_node,"name");
if(!name || !cur_node->txt || !strlen(cur_node->txt)) {
ctx->set_error(ctx,500,"<pragma> missing name attribute");
return;
}
apr_table_set(cache->pragmas,name,cur_node->txt);
cur_node = cur_node->next;
}
}
if ((cur_node = ezxml_child(node, "queries")) != NULL) {
ezxml_t query_node;
if ((query_node = ezxml_child(cur_node, "exists")) != NULL) {
cache->exists_stmt.sql = apr_pstrdup(ctx->pool,query_node->txt);
}
if ((query_node = ezxml_child(cur_node, "get")) != NULL) {
cache->get_stmt.sql = apr_pstrdup(ctx->pool,query_node->txt);
}
if ((query_node = ezxml_child(cur_node, "set")) != NULL) {
cache->set_stmt.sql = apr_pstrdup(ctx->pool,query_node->txt);
}
if ((query_node = ezxml_child(cur_node, "delete")) != NULL) {
cache->delete_stmt.sql = apr_pstrdup(ctx->pool,query_node->txt);
}
if ((query_node = ezxml_child(cur_node, "create")) != NULL) {
cache->create_stmt.sql = apr_pstrdup(ctx->pool,query_node->txt);
}
}
cur_node = ezxml_child(node,"xcount");
if(cur_node && cur_node->txt && *cur_node->txt) {
char *endptr;
cache->count_x = (int)strtol(cur_node->txt,&endptr,10);
if(*endptr != 0) {
ctx->set_error(ctx,400,"failed to parse xcount value %s for sqlite cache %s", cur_node->txt,cache->cache.name);
return;
}
}
cur_node = ezxml_child(node,"ycount");
if(cur_node && cur_node->txt && *cur_node->txt) {
char *endptr;
cache->count_y = (int)strtol(cur_node->txt,&endptr,10);
if(*endptr != 0) {
ctx->set_error(ctx,400,"failed to parse ycount value %s for sqlite cache %s", cur_node->txt,cache->cache.name);
return;
}
}
}
/**
* \private \memberof mapcache_cache_sqlite
*/
static void _mapcache_cache_sqlite_configuration_post_config(mapcache_context *ctx,
mapcache_cache *pcache, mapcache_cfg *cfg)
{
mapcache_cache_sqlite *cache = (mapcache_cache_sqlite*)pcache;
if (!cache->dbfile) {
ctx->set_error(ctx, 500, "sqlite cache \"%s\" is missing <dbfile> entry", pcache->name);
return;
}
}
/**
* \private \memberof mapcache_cache_sqlite
*/
static void _mapcache_cache_mbtiles_configuration_post_config(mapcache_context *ctx,
mapcache_cache *pcache, mapcache_cfg *cfg)
{
/* check that only one tileset/grid references this cache, as mbtiles does
not support multiple tilesets/grids per cache */
#ifdef FIXME
int nrefs = 0;
apr_hash_index_t *tileseti = apr_hash_first(ctx->pool,cfg->tilesets);
while(tileseti) {
mapcache_tileset *tileset;
const void *key;
apr_ssize_t keylen;
apr_hash_this(tileseti,&key,&keylen,(void**)&tileset);
if(tileset->cache == cache) {
nrefs++;
if(nrefs>1) {
ctx->set_error(ctx,500,"mbtiles cache %s is referenced by more than 1 tileset, which is not supported",cache->name);
return;
}
if(tileset->grid_links->nelts > 1) {
ctx->set_error(ctx,500,"mbtiles cache %s is referenced by tileset %s which has more than 1 grid, which is not supported",cache->name,tileset->name);
return;
}
}
tileseti = apr_hash_next(tileseti);
}
#endif
}
mapcache_cache* mapcache_cache_sqlite_create(mapcache_context *ctx)
{
mapcache_cache_sqlite *cache = apr_pcalloc(ctx->pool, sizeof (mapcache_cache_sqlite));
if (!cache) {
ctx->set_error(ctx, 500, "failed to allocate sqlite cache");
return NULL;
}
cache->cache.metadata = apr_table_make(ctx->pool, 3);
cache->cache.type = MAPCACHE_CACHE_SQLITE;
cache->cache._tile_delete = _mapcache_cache_sqlite_delete;
cache->cache._tile_get = _mapcache_cache_sqlite_get;
cache->cache._tile_exists = _mapcache_cache_sqlite_has_tile;