feat: multithreaded bulk import

CHANGELOG.md

@@ -7,6 +7,9 @@ to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
 
+- Adds queries for Bulk Import
+- Adds support for multithreaded bulk import
+
 ## [7.2.0] - 2024-10-03
 
 - Compatible with plugin interface version 6.3

src/main/java/io/supertokens/storage/mysql/BulkImportProxyConnection.java

@@ -0,0 +1,328 @@
+/*
+ *    Copyright (c) 2024, VRAI Labs and/or its affiliates. All rights reserved.
+ *
+ *    This software is licensed under the Apache License, Version 2.0 (the
+ *    "License") as published by the Apache Software Foundation.
+ *
+ *    You may not use this file except in compliance with the License. You may
+ *    obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ *    License for the specific language governing permissions and limitations
+ *    under the License.
+ */
+
+
+package io.supertokens.storage.mysql;
+
+import java.sql.*;
+import java.util.Map;
+import java.util.Properties;
+import java.util.concurrent.Executor;
+
+/**
+* BulkImportProxyConnection is a class implementing the Connection interface, serving as a Connection instance in the bulk import user cronjob.
+* This cron extensively utilizes existing queries to import users, all of which internally operate within transactions and those query sometimes 
+* call the commit/rollback method on the connection.
+* 
+* For the purpose of bulkimport cronjob, we aim to employ a single connection for all queries and rollback any operations in case of query failures.
+* To achieve this, we use our own proxy Connection instance and override the commit/rollback/close methods to do nothing. 
+*/
+
+public class BulkImportProxyConnection implements Connection {
+    private Connection con = null;
+
+    public BulkImportProxyConnection(Connection con) {
+        this.con = con;
+    }
+
+    @Override
+    public void close() throws SQLException {
+        // We simply ignore when close is called BulkImportProxyConnection
+    }
+
+    @Override
+    public void commit() throws SQLException {
+        // We simply ignore when commit is called BulkImportProxyConnection
+    }
+
+    @Override
+    public void rollback() throws SQLException {
+        // We simply ignore when rollback is called BulkImportProxyConnection
+    }
+
+    public void closeForBulkImportProxyStorage() throws SQLException {
+        this.con.close();
+    }
+
+    public void commitForBulkImportProxyStorage() throws SQLException {
+        this.con.commit();
+    }
+
+    public void rollbackForBulkImportProxyStorage() throws SQLException {
+        this.con.rollback();
+    }
+
+    /* Following methods are unchaged */
+
+    @Override
+    public Statement createStatement() throws SQLException {
+        return this.con.createStatement();
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql) throws SQLException {
+        return this.con.prepareStatement(sql);
+    }
+
+    @Override
+    public CallableStatement prepareCall(String sql) throws SQLException {
+        return this.con.prepareCall(sql);
+    }
+
+    @Override
+    public String nativeSQL(String sql) throws SQLException {
+        return this.con.nativeSQL(sql);
+    }
+
+    @Override
+    public void setAutoCommit(boolean autoCommit) throws SQLException {
+        this.con.setAutoCommit(autoCommit);
+    }
+
+    @Override
+    public boolean getAutoCommit() throws SQLException {
+        return this.con.getAutoCommit();
+    }
+
+    @Override
+    public boolean isClosed() throws SQLException {
+        return this.con.isClosed();
+    }
+
+    @Override
+    public DatabaseMetaData getMetaData() throws SQLException {
+        return this.con.getMetaData();
+    }
+
+    @Override
+    public void setReadOnly(boolean readOnly) throws SQLException {
+        this.con.setReadOnly(readOnly);
+    }
+
+    @Override
+    public boolean isReadOnly() throws SQLException {
+        return this.con.isReadOnly();
+    }
+
+    @Override
+    public void setCatalog(String catalog) throws SQLException {
+        this.con.setCatalog(catalog);
+    }
+
+    @Override
+    public String getCatalog() throws SQLException {
+        return this.con.getCatalog();
+    }
+
+    @Override
+    public void setTransactionIsolation(int level) throws SQLException {
+        this.con.setTransactionIsolation(level);
+    }
+
+    @Override
+    public int getTransactionIsolation() throws SQLException {
+        return this.con.getTransactionIsolation();
+    }
+
+    @Override
+    public SQLWarning getWarnings() throws SQLException {
+        return this.con.getWarnings();
+    }
+
+    @Override
+    public void clearWarnings() throws SQLException {
+        this.con.clearWarnings();
+    }
+
+    @Override
+    public Statement createStatement(int resultSetType, int resultSetConcurrency) throws SQLException {
+        return this.con.createStatement(resultSetType, resultSetConcurrency);
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency)
+            throws SQLException {
+        return this.con.prepareStatement(sql, resultSetType, resultSetConcurrency);
+    }
+
+    @Override
+    public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
+        return this.con.prepareCall(sql, resultSetType, resultSetConcurrency);
+    }
+
+    @Override
+    public Map<String, Class<?>> getTypeMap() throws SQLException {
+        return this.con.getTypeMap();
+    }
+
+    @Override
+    public void setTypeMap(Map<String, Class<?>> map) throws SQLException {
+        this.con.setTypeMap(map);
+    }
+
+    @Override
+    public void setHoldability(int holdability) throws SQLException {
+        this.con.setHoldability(holdability);
+    }
+
+    @Override
+    public int getHoldability() throws SQLException {
+        return this.con.getHoldability();
+    }
+
+    @Override
+    public Savepoint setSavepoint() throws SQLException {
+        return this.con.setSavepoint();
+    }
+
+    @Override
+    public Savepoint setSavepoint(String name) throws SQLException {
+        return this.con.setSavepoint(name);
+    }
+
+    @Override
+    public void rollback(Savepoint savepoint) throws SQLException {
+        this.con.rollback(savepoint);
+    }
+
+    @Override
+    public void releaseSavepoint(Savepoint savepoint) throws SQLException {
+        this.con.releaseSavepoint(savepoint);
+    }
+
+    @Override
+    public Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability)
+            throws SQLException {
+        return this.con.createStatement(resultSetType, resultSetConcurrency, resultSetHoldability);
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency,
+            int resultSetHoldability) throws SQLException {
+        return this.con.prepareStatement(sql, resultSetType, resultSetConcurrency, resultSetHoldability);
+    }
+
+    @Override
+    public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency,
+            int resultSetHoldability) throws SQLException {
+        return this.con.prepareCall(sql, resultSetType, resultSetConcurrency, resultSetHoldability);
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException {
+        return this.con.prepareStatement(sql, autoGeneratedKeys);
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException {
+        return this.con.prepareStatement(sql, columnIndexes);
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException {
+        return this.con.prepareStatement(sql, columnNames);
+    }
+
+    @Override
+    public Clob createClob() throws SQLException {
+        return this.con.createClob();
+    }
+
+    @Override
+    public Blob createBlob() throws SQLException {
+        return this.con.createBlob();
+    }
+
+    @Override
+    public NClob createNClob() throws SQLException {
+        return this.con.createNClob();
+    }
+
+    @Override
+    public SQLXML createSQLXML() throws SQLException {
+        return this.con.createSQLXML();
+    }
+
+    @Override
+    public boolean isValid(int timeout) throws SQLException {
+        return this.con.isValid(timeout);
+    }
+
+    @Override
+    public void setClientInfo(String name, String value) throws SQLClientInfoException {
+        this.con.setClientInfo(name, value);
+    }
+
+    @Override
+    public void setClientInfo(Properties properties) throws SQLClientInfoException {
+        this.con.setClientInfo(properties);
+    }
+
+    @Override
+    public String getClientInfo(String name) throws SQLException {
+        return this.con.getClientInfo(name);
+    }
+
+    @Override
+    public Properties getClientInfo() throws SQLException {
+        return this.con.getClientInfo();
+    }
+
+    @Override
+    public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
+        return this.con.createArrayOf(typeName, elements);
+    }
+
+    @Override
+    public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
+        return this.con.createStruct(typeName, attributes);
+    }
+
+    @Override
+    public void setSchema(String schema) throws SQLException {
+        this.con.setSchema(schema);
+    }
+
+    @Override
+    public String getSchema() throws SQLException {
+        return this.con.getSchema();
+    }
+
+    @Override
+    public void abort(Executor executor) throws SQLException {
+        this.con.abort(executor);
+    }
+
+    @Override
+    public void setNetworkTimeout(Executor executor, int milliseconds) throws SQLException {
+        this.con.setNetworkTimeout(executor, milliseconds);
+    }
+
+    @Override
+    public int getNetworkTimeout() throws SQLException {
+        return this.con.getNetworkTimeout();
+    }
+
+    @Override
+    public <T> T unwrap(Class<T> iface) throws SQLException {
+        return this.con.unwrap(iface);
+    }
+
+    @Override
+    public boolean isWrapperFor(Class<?> iface) throws SQLException {
+        return this.con.isWrapperFor(iface);
+    }
+}