ipld-eth-server/cmd/composeAndExecute.go
Rob Mulholand 2d684c5aec Extract storage diff fetching behind an interface
- Replaces directly reading from a CSV
- Simplifies testing
- Should hopefully make it easier to plug in other sources for storage
  diffs (e.g. differently formatted CSVs, JSON RPC, etc)
2019-05-01 12:30:36 -05:00

196 lines
6.2 KiB
Go

// Copyright © 2019 Vulcanize, Inc
//
// 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 cmd
import (
"os"
"plugin"
syn "sync"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"github.com/vulcanize/vulcanizedb/libraries/shared/fetcher"
"github.com/vulcanize/vulcanizedb/libraries/shared/watcher"
"github.com/vulcanize/vulcanizedb/pkg/fs"
p2 "github.com/vulcanize/vulcanizedb/pkg/plugin"
"github.com/vulcanize/vulcanizedb/pkg/plugin/helpers"
"github.com/vulcanize/vulcanizedb/utils"
)
// composeAndExecuteCmd represents the composeAndExecute command
var composeAndExecuteCmd = &cobra.Command{
Use: "composeAndExecute",
Short: "Composes, loads, and executes transformer initializer plugin",
Long: `This command needs a config .toml file of form:
[database]
name = "vulcanize_public"
hostname = "localhost"
user = "vulcanize"
password = "vulcanize"
port = 5432
[client]
ipcPath = "/Users/user/Library/Ethereum/geth.ipc"
[exporter]
home = "github.com/vulcanize/vulcanizedb"
name = "exampleTransformerExporter"
save = false
transformerNames = [
"transformer1",
"transformer2",
"transformer3",
"transformer4",
]
[exporter.transformer1]
path = "path/to/transformer1"
type = "eth_event"
repository = "github.com/account/repo"
migrations = "db/migrations"
rank = "0"
[exporter.transformer2]
path = "path/to/transformer2"
type = "eth_contract"
repository = "github.com/account/repo"
migrations = "db/migrations"
rank = "2"
[exporter.transformer3]
path = "path/to/transformer3"
type = "eth_event"
repository = "github.com/account/repo"
migrations = "db/migrations"
rank = "0"
[exporter.transformer4]
path = "path/to/transformer4"
type = "eth_storage"
repository = "github.com/account2/repo2"
migrations = "to/db/migrations"
rank = "1"
Note: If any of the plugin transformer need additional
configuration variables include them in the .toml file as well
This information is used to write and build a go plugin with a transformer
set composed from the transformer imports specified in the config file
This plugin is loaded and the set of transformer initializers is exported
from it and loaded into and executed over by the appropriate watcher.
The type of watcher that the transformer works with is specified using the
type variable for each transformer in the config. Currently there are watchers
of event data from an eth node (eth_event) and storage data from an eth node
(eth_storage), and a more generic interface for accepting contract_watcher pkg
based transformers which can perform both event watching and public method
polling (eth_contract).
Transformers of different types can be ran together in the same command using a
single config file or in separate command instances using different config files
Specify config location when executing the command:
./vulcanizedb composeAndExecute --config=./environments/config_name.toml`,
Run: func(cmd *cobra.Command, args []string) {
composeAndExecute()
},
}
func composeAndExecute() {
// Build plugin generator config
prepConfig()
// Generate code to build the plugin according to the config file
log.Info("generating plugin")
generator, err := p2.NewGenerator(genConfig, databaseConfig)
if err != nil {
log.Fatal(err)
}
err = generator.GenerateExporterPlugin()
if err != nil {
log.Debug("generating plugin failed")
log.Fatal(err)
}
// Get the plugin path and load the plugin
_, pluginPath, err := genConfig.GetPluginPaths()
if err != nil {
log.Fatal(err)
}
if !genConfig.Save {
defer helpers.ClearFiles(pluginPath)
}
log.Info("linking plugin", pluginPath)
plug, err := plugin.Open(pluginPath)
if err != nil {
log.Debug("linking plugin failed")
log.Fatal(err)
}
// Load the `Exporter` symbol from the plugin
log.Info("loading transformers from plugin")
symExporter, err := plug.Lookup("Exporter")
if err != nil {
log.Debug("loading Exporter symbol failed")
log.Fatal(err)
}
// Assert that the symbol is of type Exporter
exporter, ok := symExporter.(Exporter)
if !ok {
log.Debug("plugged-in symbol not of type Exporter")
os.Exit(1)
}
// Use the Exporters export method to load the EventTransformerInitializer, StorageTransformerInitializer, and ContractTransformerInitializer sets
ethEventInitializers, ethStorageInitializers, ethContractInitializers := exporter.Export()
// Setup bc and db objects
blockChain := getBlockChain()
db := utils.LoadPostgres(databaseConfig, blockChain.Node())
// Execute over transformer sets returned by the exporter
// Use WaitGroup to wait on both goroutines
var wg syn.WaitGroup
if len(ethEventInitializers) > 0 {
ew := watcher.NewEventWatcher(&db, blockChain)
ew.AddTransformers(ethEventInitializers)
wg.Add(1)
go watchEthEvents(&ew, &wg)
}
if len(ethStorageInitializers) > 0 {
tailer := fs.FileTailer{Path: storageDiffsPath}
storageFetcher := fetcher.NewCsvTailStorageFetcher(tailer)
sw := watcher.NewStorageWatcher(storageFetcher, &db)
sw.AddTransformers(ethStorageInitializers)
wg.Add(1)
go watchEthStorage(&sw, &wg)
}
if len(ethContractInitializers) > 0 {
gw := watcher.NewContractWatcher(&db, blockChain)
gw.AddTransformers(ethContractInitializers)
wg.Add(1)
go watchEthContract(&gw, &wg)
}
wg.Wait()
}
func init() {
rootCmd.AddCommand(composeAndExecuteCmd)
composeAndExecuteCmd.Flags().BoolVar(&recheckHeadersArg, "recheckHeaders", false, "checks headers that are already checked for each transformer.")
}