Disable caching for maps with custom params

atlas/atlas.go

@@ -121,6 +121,10 @@ func (a *Atlas) SeedMapTile(ctx context.Context, m Map, z, x, y uint) error {
 		return defaultAtlas.SeedMapTile(ctx, m, z, x, y)
 	}
 
+	if len(m.Params) > 0 {
+		return nil
+	}
+
 	ctx = context.WithValue(ctx, observability.ObserveVarMapName, m.Name)
 	// confirm we have a cache backend
 	if a.cacher == nil {

config/config.go

@@ -196,13 +196,19 @@ func (c *Config) Validate() error {
 	// check for map layer name / zoom collisions
 	// map of layers to providers
 	mapLayers := map[string]map[string]provider.MapLayer{}
+	// maps with configured parameters for logging
+	mapsWithCustomParams := []string{}
 	for mapKey, m := range c.Maps {
 
 		// validate any declared query parameters
 		if err := ValidateAndRegisterParams(string(m.Name), m.Parameters); err != nil {
 			return err
 		}
 
+		if len(m.Parameters) > 0 {
+			mapsWithCustomParams = append(mapsWithCustomParams, string(m.Name))
+		}
+
 		if _, ok := mapLayers[string(m.Name)]; !ok {
 			mapLayers[string(m.Name)] = map[string]provider.MapLayer{}
 		}
@@ -300,6 +306,13 @@ func (c *Config) Validate() error {
 		}
 	}
 
+	if len(mapsWithCustomParams) > 0 {
+		log.Infof(
+			"Caching is disabled for these maps, since they have configured custom parameters: %s",
+			strings.Join(mapsWithCustomParams, ", "),
+		)
+	}
+
 	// check for blacklisted headers
 	for k := range c.Webserver.Headers {
 		for _, v := range blacklistHeaders {