forked from cerc-io/ipld-eth-server
78 lines
2.4 KiB
Go
78 lines
2.4 KiB
Go
// 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/>.
|
|
|
|
// Dynamic watcher is built with a more generic interface
|
|
// that allows offloading more of the operatinal logic to
|
|
// the transformers, allowing them to act more dynamically
|
|
// Built to work primarily with the omni pkging
|
|
package watcher
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
log "github.com/sirupsen/logrus"
|
|
|
|
"github.com/vulcanize/vulcanizedb/libraries/shared/transformer"
|
|
"github.com/vulcanize/vulcanizedb/pkg/core"
|
|
"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
|
|
)
|
|
|
|
type GenericWatcher struct {
|
|
Transformers []transformer.GenericTransformer
|
|
DB *postgres.DB
|
|
BlockChain core.BlockChain
|
|
}
|
|
|
|
func NewGenericWatcher(db *postgres.DB, bc core.BlockChain) GenericWatcher {
|
|
return GenericWatcher{
|
|
DB: db,
|
|
BlockChain: bc,
|
|
}
|
|
}
|
|
|
|
func (watcher *GenericWatcher) AddTransformers(inits interface{}) error {
|
|
initializers, ok := inits.([]transformer.GenericTransformerInitializer)
|
|
if !ok {
|
|
return fmt.Errorf("initializers of type %T, not %T", inits, []transformer.GenericTransformerInitializer{})
|
|
}
|
|
|
|
watcher.Transformers = make([]transformer.GenericTransformer, 0, len(initializers))
|
|
for _, initializer := range initializers {
|
|
t := initializer(watcher.DB, watcher.BlockChain)
|
|
watcher.Transformers = append(watcher.Transformers, t)
|
|
}
|
|
|
|
for _, transformer := range watcher.Transformers {
|
|
err := transformer.Init()
|
|
if err != nil {
|
|
log.Print("Unable to initialize transformer:", transformer.GetConfig().Name, err)
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (watcher *GenericWatcher) Execute(interface{}) error {
|
|
for _, transformer := range watcher.Transformers {
|
|
err := transformer.Execute()
|
|
if err != nil {
|
|
log.Error("Unable to execute transformer:", transformer.GetConfig().Name, err)
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|