Copy package from geth fork

indexer/database/sql/postgres/sqlx.go

@@ -0,0 +1,210 @@
+// VulcanizeDB
+// Copyright © 2019 Vulcanize
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package postgres
+
+import (
+	"context"
+	coresql "database/sql"
+	"errors"
+	"time"
+
+	"github.com/jmoiron/sqlx"
+
+	"github.com/ethereum/go-ethereum/statediff/indexer/database/metrics"
+	"github.com/ethereum/go-ethereum/statediff/indexer/database/sql"
+	"github.com/ethereum/go-ethereum/statediff/indexer/node"
+)
+
+// SQLXDriver driver, implements sql.Driver
+type SQLXDriver struct {
+	ctx      context.Context
+	db       *sqlx.DB
+	nodeInfo node.Info
+	nodeID   string
+}
+
+// ConnectSQLX initializes and returns a SQLX connection pool for postgres
+func ConnectSQLX(ctx context.Context, config Config) (*sqlx.DB, error) {
+	db, err := sqlx.ConnectContext(ctx, "postgres", config.DbConnectionString())
+	if err != nil {
+		return nil, ErrDBConnectionFailed(err)
+	}
+	if config.MaxConns > 0 {
+		db.SetMaxOpenConns(config.MaxConns)
+	}
+	if config.MaxConnLifetime > 0 {
+		db.SetConnMaxLifetime(config.MaxConnLifetime)
+	}
+	db.SetMaxIdleConns(config.MaxIdle)
+	return db, nil
+}
+
+// NewSQLXDriver returns a new sqlx driver for Postgres
+// it initializes the connection pool and creates the node info table
+func NewSQLXDriver(ctx context.Context, config Config, node node.Info) (*SQLXDriver, error) {
+	db, err := ConnectSQLX(ctx, config)
+	if err != nil {
+		return nil, err
+	}
+	driver := &SQLXDriver{ctx: ctx, db: db, nodeInfo: node}
+	if err := driver.createNode(); err != nil {
+		return nil, err
+	}
+	return driver, nil
+}
+
+func (driver *SQLXDriver) createNode() error {
+	_, err := driver.db.Exec(
+		createNodeStm,
+		driver.nodeInfo.GenesisBlock,
+		driver.nodeInfo.NetworkID,
+		driver.nodeInfo.ID,
+		driver.nodeInfo.ClientName,
+		driver.nodeInfo.ChainID)
+	if err != nil {
+		return ErrUnableToSetNode(err)
+	}
+	driver.nodeID = driver.nodeInfo.ID
+	return nil
+}
+
+// QueryRow satisfies sql.Database
+func (driver *SQLXDriver) QueryRow(_ context.Context, sql string, args ...interface{}) sql.ScannableRow {
+	return driver.db.QueryRowx(sql, args...)
+}
+
+// Exec satisfies sql.Database
+func (driver *SQLXDriver) Exec(_ context.Context, sql string, args ...interface{}) (sql.Result, error) {
+	return driver.db.Exec(sql, args...)
+}
+
+// Select satisfies sql.Database
+func (driver *SQLXDriver) Select(_ context.Context, dest interface{}, query string, args ...interface{}) error {
+	return driver.db.Select(dest, query, args...)
+}
+
+// Get satisfies sql.Database
+func (driver *SQLXDriver) Get(_ context.Context, dest interface{}, query string, args ...interface{}) error {
+	return driver.db.Get(dest, query, args...)
+}
+
+// Begin satisfies sql.Database
+func (driver *SQLXDriver) Begin(_ context.Context) (sql.Tx, error) {
+	tx, err := driver.db.Beginx()
+	if err != nil {
+		return nil, err
+	}
+	return sqlxTxWrapper{tx: tx}, nil
+}
+
+func (driver *SQLXDriver) Stats() metrics.DbStats {
+	stats := driver.db.Stats()
+	return sqlxStatsWrapper{stats: stats}
+}
+
+// NodeID satisfies sql.Database
+func (driver *SQLXDriver) NodeID() string {
+	return driver.nodeID
+}
+
+// Close satisfies sql.Database/io.Closer
+func (driver *SQLXDriver) Close() error {
+	return driver.db.Close()
+}
+
+// Context satisfies sql.Database
+func (driver *SQLXDriver) Context() context.Context {
+	return driver.ctx
+}
+
+// HasCopy satisfies sql.Database
+func (driver *SQLXDriver) UseCopyFrom() bool {
+	// sqlx does not currently support COPY.
+	return false
+}
+
+type sqlxStatsWrapper struct {
+	stats coresql.DBStats
+}
+
+// MaxOpen satisfies metrics.DbStats
+func (s sqlxStatsWrapper) MaxOpen() int64 {
+	return int64(s.stats.MaxOpenConnections)
+}
+
+// Open satisfies metrics.DbStats
+func (s sqlxStatsWrapper) Open() int64 {
+	return int64(s.stats.OpenConnections)
+}
+
+// InUse satisfies metrics.DbStats
+func (s sqlxStatsWrapper) InUse() int64 {
+	return int64(s.stats.InUse)
+}
+
+// Idle satisfies metrics.DbStats
+func (s sqlxStatsWrapper) Idle() int64 {
+	return int64(s.stats.Idle)
+}
+
+// WaitCount satisfies metrics.DbStats
+func (s sqlxStatsWrapper) WaitCount() int64 {
+	return s.stats.WaitCount
+}
+
+// WaitDuration satisfies metrics.DbStats
+func (s sqlxStatsWrapper) WaitDuration() time.Duration {
+	return s.stats.WaitDuration
+}
+
+// MaxIdleClosed satisfies metrics.DbStats
+func (s sqlxStatsWrapper) MaxIdleClosed() int64 {
+	return s.stats.MaxIdleClosed
+}
+
+// MaxLifetimeClosed satisfies metrics.DbStats
+func (s sqlxStatsWrapper) MaxLifetimeClosed() int64 {
+	return s.stats.MaxLifetimeClosed
+}
+
+type sqlxTxWrapper struct {
+	tx *sqlx.Tx
+}
+
+// QueryRow satisfies sql.Tx
+func (t sqlxTxWrapper) QueryRow(ctx context.Context, sql string, args ...interface{}) sql.ScannableRow {
+	return t.tx.QueryRowx(sql, args...)
+}
+
+// Exec satisfies sql.Tx
+func (t sqlxTxWrapper) Exec(ctx context.Context, sql string, args ...interface{}) (sql.Result, error) {
+	return t.tx.Exec(sql, args...)
+}
+
+// Commit satisfies sql.Tx
+func (t sqlxTxWrapper) Commit(ctx context.Context) error {
+	return t.tx.Commit()
+}
+
+// Rollback satisfies sql.Tx
+func (t sqlxTxWrapper) Rollback(ctx context.Context) error {
+	return t.tx.Rollback()
+}
+
+func (t sqlxTxWrapper) CopyFrom(ctx context.Context, tableName []string, columnNames []string, rows [][]interface{}) (int64, error) {
+	return 0, errors.New("Unsupported Operation")
+}