Handle shutdown on grid adapters (parse-community#5943)

* Handle shutdown on grid adapters

* Add tests

* Fix postgres test

Author: davimacedo

spec/GridFSBucketStorageAdapter.spec.js

@@ -60,4 +60,19 @@ describe('GridFSBucket and GridStore interop', () => {
     await gfsAdapter.deleteFile('myFileName');
     await expectMissingFile(gfsAdapter, 'myFileName');
   });
+
+  it('handleShutdown, close connection', done => {
+    const databaseURI = 'mongodb://localhost:27017/parse';
+    const gfsAdapter = new GridFSBucketAdapter(databaseURI);
+
+    gfsAdapter._connect().then(db => {
+      expect(db.serverConfig.connections().length > 0).toEqual(true);
+      expect(db.serverConfig.s.connected).toEqual(true);
+      gfsAdapter.handleShutdown().then(() => {
+        expect(db.serverConfig.connections().length > 0).toEqual(false);
+        expect(db.serverConfig.s.connected).toEqual(false);
+        done();
+      });
+    });
+  });
 });

spec/GridStoreAdapter.spec.js

@@ -96,4 +96,19 @@ describe_only_db('mongo')('GridStoreAdapter', () => {
       })
       .catch(fail);
   });
+
+  it('handleShutdown, close connection', done => {
+    const databaseURI = 'mongodb://localhost:27017/parse';
+    const gridStoreAdapter = new GridStoreAdapter(databaseURI);
+
+    gridStoreAdapter._connect().then(db => {
+      expect(db.serverConfig.connections().length > 0).toEqual(true);
+      expect(db.serverConfig.s.connected).toEqual(true);
+      gridStoreAdapter.handleShutdown().then(() => {
+        expect(db.serverConfig.connections().length > 0).toEqual(false);
+        expect(db.serverConfig.s.connected).toEqual(false);
+        done();
+      });
+    });
+  });
 });

spec/ParseServer.spec.js

@@ -66,14 +66,20 @@ describe('Server Url Checks', () => {
     const newConfiguration = Object.assign({}, defaultConfiguration, {
       databaseAdapter,
       serverStartComplete: () => {
-        parseServer.handleShutdown();
-        parseServer.server.close(err => {
-          if (err) {
-            done.fail('Close Server Error');
-          }
-          reconfigureServer({}).then(() => {
-            expect(close).toBe(true);
-            done();
+        let promise = Promise.resolve();
+        if (process.env.PARSE_SERVER_TEST_DB !== 'postgres') {
+          promise = parseServer.config.filesController.adapter._connect();
+        }
+        promise.then(() => {
+          parseServer.handleShutdown();
+          parseServer.server.close(err => {
+            if (err) {
+              done.fail('Close Server Error');
+            }
+            reconfigureServer({}).then(() => {
+              expect(close).toBe(true);
+              done();
+            });
           });
         });
       },

src/Adapters/Files/GridFSBucketAdapter.js

@@ -32,7 +32,10 @@ export class GridFSBucketAdapter extends FilesAdapter {
       this._connectionPromise = MongoClient.connect(
         this._databaseURI,
         this._mongoOptions
-      ).then(client => client.db(client.s.options.dbName));
+      ).then(client => {
+        this._client = client;
+        return client.db(client.s.options.dbName);
+      });
     }
     return this._connectionPromise;
   }
@@ -98,6 +101,13 @@ export class GridFSBucketAdapter extends FilesAdapter {
     const bucket = await this._getBucket();
     return bucket.openDownloadStreamByName(filename);
   }
+
+  handleShutdown() {
+    if (!this._client) {
+      return Promise.resolve();
+    }
+    return this._client.close(false);
+  }
 }
 
 export default GridFSBucketAdapter;

src/Adapters/Files/GridStoreAdapter.js

@@ -33,7 +33,10 @@ export class GridStoreAdapter extends FilesAdapter {
       this._connectionPromise = MongoClient.connect(
         this._databaseURI,
         this._mongoOptions
-      ).then(client => client.db(client.s.options.dbName));
+      ).then(client => {
+        this._client = client;
+        return client.db(client.s.options.dbName);
+      });
     }
     return this._connectionPromise;
   }
@@ -99,6 +102,13 @@ export class GridStoreAdapter extends FilesAdapter {
       });
     });
   }
+
+  handleShutdown() {
+    if (!this._client) {
+      return Promise.resolve();
+    }
+    return this._client.close(false);
+  }
 }
 
 export default GridStoreAdapter;

src/ParseServer.js

@@ -114,18 +114,22 @@ class ParseServer {
   }
 
   handleShutdown() {
-    const { adapter } = this.config.databaseController;
-    if (adapter && typeof adapter.handleShutdown === 'function') {
-      const promise = adapter.handleShutdown();
-      if (promise instanceof Promise) {
-        return promise.then(() => {
-          if (this.config.serverCloseComplete) {
-            this.config.serverCloseComplete();
-          }
-        });
-      }
+    const promises = [];
+    const { adapter: databaseAdapter } = this.config.databaseController;
+    if (
+      databaseAdapter &&
+      typeof databaseAdapter.handleShutdown === 'function'
+    ) {
+      promises.push(databaseAdapter.handleShutdown());
+    }
+    const { adapter: fileAdapter } = this.config.filesController;
+    if (fileAdapter && typeof fileAdapter.handleShutdown === 'function') {
+      promises.push(fileAdapter.handleShutdown());
     }
-    return Promise.resolve().then(() => {
+    return (promises.length > 0
+      ? Promise.all(promises)
+      : Promise.resolve()
+    ).then(() => {
       if (this.config.serverCloseComplete) {
         this.config.serverCloseComplete();
       }