Small rename

build.gradle

@@ -117,6 +117,7 @@ dependencies {
 
     include(implementation 'org.rocksdb:rocksdbjni:8.10.0')
     include(implementation 'redis.clients:jedis:5.1.0')
+    include(implementation 'org.apache.commons:commons-pool2:2.12.0')
     //implementation 'org.rocksdb:rocksdbjni:8.10.0'
     //implementation 'redis.clients:jedis:5.1.0'
 }

src/main/java/me/cortex/voxy/common/storage/other/ReadonlyCachingLayer.java

@@ -0,0 +1,84 @@
+package me.cortex.voxy.common.storage.other;
+
+import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
+import me.cortex.voxy.common.storage.StorageBackend;
+import me.cortex.voxy.common.storage.config.ConfigBuildCtx;
+import me.cortex.voxy.common.storage.config.StorageConfig;
+
+import java.nio.ByteBuffer;
+import java.util.List;
+
+public class ReadonlyCachingLayer extends StorageBackend {
+    private final StorageBackend cache;
+    private final StorageBackend onMiss;
+
+    public ReadonlyCachingLayer(StorageBackend cache, StorageBackend onMiss) {
+        this.cache = cache;
+        this.onMiss = onMiss;
+    }
+
+    @Override
+    public ByteBuffer getSectionData(long key) {
+        var result = this.cache.getSectionData(key);
+        if (result != null) {
+            return result;
+        }
+        result = this.onMiss.getSectionData(key);
+        if (result != null) {
+            this.cache.setSectionData(key, result);
+        }
+        return result;
+    }
+
+    @Override
+    public void setSectionData(long key, ByteBuffer data) {
+        this.cache.setSectionData(key, data);
+    }
+
+    @Override
+    public void deleteSectionData(long key) {
+        this.cache.deleteSectionData(key);
+    }
+
+    @Override
+    public void putIdMapping(int id, ByteBuffer data) {
+        this.cache.putIdMapping(id, data);
+    }
+
+    @Override
+    public Int2ObjectOpenHashMap<byte[]> getIdMappingsData() {
+        //TODO: replicate this data onto the cache
+        return this.onMiss.getIdMappingsData();
+    }
+
+    @Override
+    public void flush() {
+        this.cache.close();
+        this.onMiss.close();
+    }
+
+    @Override
+    public void close() {
+        this.cache.close();
+        this.onMiss.close();
+    }
+
+    public static class Config extends StorageConfig {
+        public StorageConfig cache;
+        public StorageConfig onMiss;
+
+        @Override
+        public List<StorageConfig> getChildStorageConfigs() {
+            return List.of(this.cache, this.onMiss);
+        }
+
+        @Override
+        public StorageBackend build(ConfigBuildCtx ctx) {
+            return new ReadonlyCachingLayer(this.cache.build(ctx), this.onMiss.build(ctx));
+        }
+
+        public static String getConfigTypeName() {
+            return "ReadonlyCachingLayer";
+        }
+    }
+}