77 lines
2.3 KiB
Go
77 lines
2.3 KiB
Go
// VulcanizeDB
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// Copyright © 2019 Vulcanize
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package postgres
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import (
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"time"
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"github.com/jmoiron/sqlx"
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_ "github.com/lib/pq" //postgres driver
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"github.com/vulcanize/ipfs-blockchain-watcher/pkg/config"
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"github.com/vulcanize/ipfs-blockchain-watcher/pkg/core"
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)
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type DB struct {
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*sqlx.DB
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Node core.Node
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NodeID int64
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}
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func NewDB(databaseConfig config.Database, node core.Node) (*DB, error) {
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connectString := config.DbConnectionString(databaseConfig)
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db, connectErr := sqlx.Connect("postgres", connectString)
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if connectErr != nil {
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return &DB{}, ErrDBConnectionFailed(connectErr)
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}
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if databaseConfig.MaxOpen > 0 {
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db.SetMaxOpenConns(databaseConfig.MaxOpen)
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}
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if databaseConfig.MaxIdle > 0 {
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db.SetMaxIdleConns(databaseConfig.MaxIdle)
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}
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if databaseConfig.MaxLifetime > 0 {
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lifetime := time.Duration(databaseConfig.MaxLifetime) * time.Second
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db.SetConnMaxLifetime(lifetime)
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}
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pg := DB{DB: db, Node: node}
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nodeErr := pg.CreateNode(&node)
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if nodeErr != nil {
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return &DB{}, ErrUnableToSetNode(nodeErr)
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}
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return &pg, nil
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}
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func (db *DB) CreateNode(node *core.Node) error {
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var nodeID int64
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err := db.QueryRow(
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`INSERT INTO nodes (genesis_block, network_id, node_id, client_name)
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VALUES ($1, $2, $3, $4)
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ON CONFLICT (genesis_block, network_id, node_id)
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DO UPDATE
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SET genesis_block = $1,
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network_id = $2,
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node_id = $3,
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client_name = $4
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RETURNING id`,
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node.GenesisBlock, node.NetworkID, node.ID, node.ClientName).Scan(&nodeID)
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if err != nil {
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return ErrUnableToSetNode(err)
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}
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db.NodeID = nodeID
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return nil
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}
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