增加release mbtiles接口（10秒内有效）

Author: liushaofeng

src/main/java/io/github/qmjy/mapserver/MapServerDataCenter.java

@@ -17,6 +17,7 @@
 package io.github.qmjy.mapserver;
 
 import com.graphhopper.GraphHopper;
+import com.zaxxer.hikari.HikariDataSource;
 import io.github.qmjy.mapserver.model.AdministrativeDivisionTmp;
 import io.github.qmjy.mapserver.model.FontsFileModel;
 import io.github.qmjy.mapserver.model.TilesFileModel;
@@ -32,6 +33,7 @@
 import org.springframework.stereotype.Component;
 import org.springframework.util.StringUtils;
 
+import javax.sql.DataSource;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
@@ -262,6 +264,19 @@ public Optional<JdbcTemplate> getDataSource(String fileName) {
         }
     }
 
+    public void releaseDataSource(String fileName) {
+        if (StringUtils.hasLength(fileName) && tilesMap.containsKey(fileName)) {
+            TilesFileModel remove = tilesMap.remove(fileName);
+            JdbcTemplate jdbcTemplate = remove.getJdbcTemplate();
+            //执行检查点操作，将所有WAL内容写入主数据库文件
+            jdbcTemplate.execute("PRAGMA wal_checkpoint(FULL)");
+            DataSource dataSource = jdbcTemplate.getDataSource();
+            if (dataSource instanceof HikariDataSource hikariDataSource) {
+                hikariDataSource.close();
+            }
+        }
+    }
+
     /**
      * 返回瓦片文件对象
      *

src/main/java/io/github/qmjy/mapserver/controller/MapServerTilesetsRestController.java

@@ -343,6 +343,20 @@ private Optional<byte[]> getPbfBytes(String tileset, int z, int x, int y) {
         }
     }
 
+    /**
+     * 释放万片资源
+     *
+     * @param tileset 待释放的瓦片资源
+     * @return 释放结果
+     */
+    @DeleteMapping(value = "/{tileset}", produces = MediaType.APPLICATION_JSON_VALUE)
+    @ResponseBody
+    @Operation(summary = "释放mbtiles文件", description = "释放mbtiles文件。")
+    public ResponseEntity<Object> release(@Parameter(description = "待释放的瓦片数据源或文件夹名字，例如：admin.mbtiles。") @PathVariable("tileset") String tileset) {
+        mapServerDataCenter.releaseDataSource(tileset);
+        return ResponseEntity.ok().contentType(MediaType.APPLICATION_JSON).body("Success");
+    }
+
 
     /**
      * 获取指定底图数据的元数据