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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// Contract watcher is built with a more generic interface
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// that allows offloading more of the operational logic to
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// the transformers, allowing them to act more dynamically
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// Built to work primarily with the contract_watcher packaging
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package watcher
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import (
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"fmt"
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log "github.com/sirupsen/logrus"
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"github.com/vulcanize/vulcanizedb/libraries/shared/transformer"
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"github.com/vulcanize/vulcanizedb/pkg/core"
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"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
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)
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type ContractWatcher struct {
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Transformers []transformer.ContractTransformer
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DB *postgres.DB
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BlockChain core.BlockChain
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}
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func NewContractWatcher(db *postgres.DB, bc core.BlockChain) ContractWatcher {
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return ContractWatcher{
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DB: db,
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BlockChain: bc,
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}
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}
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func (watcher *ContractWatcher) AddTransformers(inits interface{}) error {
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initializers, ok := inits.([]transformer.ContractTransformerInitializer)
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if !ok {
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return fmt.Errorf("initializers of type %T, not %T", inits, []transformer.ContractTransformerInitializer{})
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}
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for _, initializer := range initializers {
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t := initializer(watcher.DB, watcher.BlockChain)
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watcher.Transformers = append(watcher.Transformers, t)
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}
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for _, transformer := range watcher.Transformers {
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err := transformer.Init()
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if err != nil {
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log.Print("Unable to initialize transformer:", transformer.GetConfig().Name, err)
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return err
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}
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}
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return nil
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}
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func (watcher *ContractWatcher) Execute() error {
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for _, transformer := range watcher.Transformers {
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err := transformer.Execute()
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if err != nil {
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log.Error("Unable to execute transformer:", transformer.GetConfig().Name, err)
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return err
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}
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}
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return nil
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}
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