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/******************************************************************************
* $Id$
*
* Project: MapServer
* Purpose: MapCache tile caching support file: common datasource functions
* 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"
#include <apr_time.h>
void mapcache_source_init(mapcache_context *ctx, mapcache_source *source)
{
mapcache_extent tmp_extent = {-1,-1,-1,-1};
source->data_extent = tmp_extent;
source->metadata = apr_table_make(ctx->pool,3);
source->retry_count = 1;
source->retry_delay = 0.1;
}
void mapcache_source_render_map(mapcache_context *ctx, mapcache_source *source, mapcache_map *map) {
int i;
#ifdef DEBUG
ctx->log(ctx, MAPCACHE_DEBUG, "calling render_map on source (%s): tileset=%s, grid=%s, extent=(%f,%f,%f,%f)",
source->name, map->tileset->name, map->grid_link->grid->name,
map->extent.minx, map->extent.miny, map->extent.maxx, map->extent.maxy);
#endif
for(i=0;i<=source->retry_count;i++) {
if(i) { /* not our first try */
ctx->log(ctx, MAPCACHE_INFO, "source (%s) render_map retry %d of %d. previous try returned error: %s",
source->name, i, source->retry_count, ctx->get_error_message(ctx));
ctx->clear_errors(ctx);
if(source->retry_delay > 0) {
double wait = source->retry_delay;
int j = 0;
for(j=1;j<i;j++) /* sleep twice as long as before previous retry */
wait *= 2;
apr_sleep((int)(wait*1000000)); /* apr_sleep expects microseconds */
}
}
source->_render_map(ctx, source, map);
if(!GC_HAS_ERROR(ctx))
break;
}
}
void mapcache_source_query_info(mapcache_context *ctx, mapcache_source *source, mapcache_feature_info *fi) {
int i;
#ifdef DEBUG
ctx->log(ctx, MAPCACHE_DEBUG, "calling query_info on source (%s): tileset=%s, grid=%s,",
source->name, fi->map.tileset->name, fi->map.grid_link->grid->name);
#endif
for(i=0;i<=source->retry_count;i++) {
if(i) { /* not our first try */
ctx->log(ctx, MAPCACHE_INFO, "source (%s) query_info retry %d of %d. previous try returned error: %s",
source->name, i, source->retry_count, ctx->get_error_message(ctx));
ctx->clear_errors(ctx);
if(source->retry_delay > 0) {
double wait = source->retry_delay;
int j = 0;
for(j=1;j<i;j++) /* sleep twice as long as before previous retry */
wait *= 2;
apr_sleep((int)(wait*1000000)); /* apr_sleep expects microseconds */
}
}
source->_query_info(ctx, source, fi);
if(!GC_HAS_ERROR(ctx))
break;
}
}
/* vim: ts=2 sts=2 et sw=2
*/
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