layer fix

.gitignore

@@ -1,13 +1 @@
-target
-.settings
-.project
-.classpath
-.extract
-*.log
-*.mv.db
-logs
-node_modules
-heimdallr-data
-.idea
-*.iml
-tiles
+tiles

layers.json

@@ -1,13 +0,0 @@
-{
-  "layers": [{
-    "id": 0,
-    "name": "Earth",
-    "from": -16,
-    "to": 160
-  },{
-    "id": 1,
-    "name": "Moon",
-    "from": 5000,
-    "to": 5500
-  }]
-}

src/main/java/io/rudin/minetest/tileserver/TileRenderer.java

@@ -161,7 +161,7 @@ public class TileRenderer {
 		if (cache.has(layer.id, tileX, tileY, zoom)) {
 			byte[] data = cache.get(layer.id, tileX, tileY, zoom);
 
-			if (data != null)
+			if (data != null && data.length > 0)
 				//In case the cache disappears
 				return ImageIO.read(new ByteArrayInputStream(data));
 		}

src/main/java/io/rudin/minetest/tileserver/provider/LayerConfigProvider.java

@@ -1,6 +1,7 @@
 package io.rudin.minetest.tileserver.provider;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
+import io.rudin.minetest.tileserver.config.Layer;
 import io.rudin.minetest.tileserver.config.LayerConfig;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -34,6 +35,10 @@ public class LayerConfigProvider implements Provider<LayerConfig> {
         ObjectMapper mapper = new ObjectMapper();
         this.layers = mapper.readValue(layersInput, LayerConfig.class);
 
+        for (Layer layer: layers.layers){
+            logger.info("Configured layer: id={} name={} from={} to={}", layer.id, layer.name, layer.from, layer.to);
+        }
+
         layersInput.close();
     }
 

tileserver.properties

@@ -5,6 +5,6 @@ tilerenderer.updateinterval=10
 #log.query.performance=true
 #block.parser.smartshop.enable=false
 #prometheus.enable=true
-minetest.db.url=jdbc:postgresql://127.0.0.1:5432/postgres
+minetest.db.url=jdbc:postgresql://127.0.0.1:5432/minetest
 
 static.files.location=src/main/resources/public