Patch handleShutdown feature (#4361)

* Add handleShutdown Test of MongoStorageAdapter.

* Add `handleShutdown` function in PostgresStorageAdapter, with it's test.

* Replace the _pgp to _client

* Use  `adapter._client.$pool.ending` to ckeck is ending

* Add `handleShutdown()` in ParseServer.spec.js

* Trigger

* Set Server to Default

spec/MongoStorageAdapter.spec.js

@@ -237,4 +237,23 @@ describe_only_db('mongo')('MongoStorageAdapter', () => {
         done();
       });
   });
+
+  it('handleShutdown, close connection', (done) => {
+    const adapter = new MongoStorageAdapter({ uri: databaseURI });
+
+    const schema = {
+      fields: {
+        array: { type: 'Array' },
+        object: { type: 'Object' },
+        date: { type: 'Date' },
+      }
+    };
+
+    adapter.createObject('MyClass', schema, {}).then(() => {
+      expect(adapter.database.serverConfig.isConnected()).toEqual(true);
+      adapter.handleShutdown()
+      expect(adapter.database.serverConfig.isConnected()).toEqual(false);
+      done();
+    });
+  });
 });

spec/ParseServer.spec.js

@@ -33,4 +33,35 @@ describe('Server Url Checks', () => {
       done();
     });
   });
+
+  it('handleShutdown, close connection', (done) => {
+    var MongoStorageAdapter = require('../src/Adapters/Storage/Mongo/MongoStorageAdapter');
+    const PostgresStorageAdapter = require('../src/Adapters/Storage/Postgres/PostgresStorageAdapter');
+    const mongoURI = 'mongodb://localhost:27017/parseServerMongoAdapterTestDatabase';
+    const postgresURI = 'postgres://localhost:5432/parse_server_postgres_adapter_test_database';
+    let databaseAdapter;
+    if (process.env.PARSE_SERVER_TEST_DB === 'postgres') {
+      databaseAdapter = new PostgresStorageAdapter({
+        uri: process.env.PARSE_SERVER_TEST_DATABASE_URI || postgresURI,
+        collectionPrefix: 'test_',
+      });
+    } else {
+      databaseAdapter = new MongoStorageAdapter({
+        uri: mongoURI,
+        collectionPrefix: 'test_',
+      });
+    }
+    const newConfiguration = Object.assign({}, defaultConfiguration, { databaseAdapter });
+    const parseServer = ParseServer.start(newConfiguration, () => {
+      parseServer.handleShutdown();
+      parseServer.server.close((err) => {
+        if (err) {
+          done.fail('Close Server Error')
+        }
+        reconfigureServer({}).then(() => {
+          done();
+        });
+      });
+    });
+  });
 });

spec/PostgresStorageAdapter.spec.js

@@ -0,0 +1,22 @@
+const PostgresStorageAdapter = require('../src/Adapters/Storage/Postgres/PostgresStorageAdapter');
+const databaseURI = 'postgres://localhost:5432/parse_server_postgres_adapter_test_database';
+
+describe_only_db('postgres')('PostgresStorageAdapter', () => {
+  beforeEach(done => {
+    const adapter = new PostgresStorageAdapter({ uri: databaseURI })
+      .deleteAllClasses()
+      .then(() => {
+        adapter.handleShutdown();
+      }, fail)
+      .catch(done);
+  });
+
+  it('handleShutdown, close connection', (done) => {
+    const adapter = new PostgresStorageAdapter({ uri: databaseURI });
+
+    expect(adapter._client.$pool.ending).toEqual(false);
+    adapter.handleShutdown();
+    expect(adapter._client.$pool.ending).toEqual(true);
+    done();
+  });
+});

src/Adapters/Storage/Postgres/PostgresStorageAdapter.js

@@ -574,6 +574,13 @@ export class PostgresStorageAdapter {
     this._pgp = pgp;
   }
 
+  handleShutdown() {
+    if (!this._client) {
+      return
+    }
+    this._client.$pool.end();
+  }
+
   _ensureSchemaCollectionExists(conn) {
     conn = conn || this._client;
     return conn.none('CREATE TABLE IF NOT EXISTS "_SCHEMA" ( "className" varChar(120), "schema" jsonb, "isParseClass" bool, PRIMARY KEY ("className") )')