Add the concept of multiple environments

* Right now, the two environments are Public and Private
    * This was to reflect the two blockchains we run against

.travis.yml

@@ -5,8 +5,8 @@ go:
 services:
   - postgresql
 before_script:
-  - createdb vulcanize
-  - psql vulcanize < migrations/schema.sql
+  - createdb vulcanize_private
+  - psql vulcanize_private < migrations/schema.sql
 script:
   - go test -v ./core/...
 notifications:

Gododir/main.go

@@ -3,29 +3,70 @@ package main
 import (
 	"log"
 
+	"fmt"
+
+	cfg "github.com/8thlight/vulcanizedb/config"
 	"github.com/8thlight/vulcanizedb/core"
 	"github.com/jmoiron/sqlx"
 	do "gopkg.in/godo.v2"
 )
 
+func parseIpcPath(context *do.Context) string {
+	ipcPath := context.Args.MayString("", "ipc-path", "i")
+	if ipcPath == "" {
+		log.Fatalln("--ipc-path required")
+	}
+	return ipcPath
+}
+
+func startBlockchainListener(config cfg.Config, ipcPath string) {
+	port := config.Database.Port
+	host := config.Database.Hostname
+	databaseName := config.Database.Name
+
+	var blockchain core.Blockchain = core.NewGethBlockchain(ipcPath)
+	blockchain.RegisterObserver(core.BlockchainLoggingObserver{})
+	pgConfig := fmt.Sprintf("host=%s port=%d dbname=%s sslmode=disable", host, port, databaseName)
+	db, err := sqlx.Connect("postgres", pgConfig)
+	if err != nil {
+		log.Fatalf("Error connecting to DB: %v\n", err)
+	}
+	blockchain.RegisterObserver(core.BlockchainDBObserver{Db: db})
+	blockchain.SubscribeToEvents()
+}
+
 func tasks(p *do.Project) {
 
-	p.Task("run", nil, func(context *do.Context) {
-		ipcPath := context.Args.MayString("", "ipc-path", "i")
+	p.Task("runPublic", nil, func(context *do.Context) {
+		startBlockchainListener(cfg.Public(), parseIpcPath(context))
+	})
 
-		port := "5432"
-		host := "localhost"
-		databaseName := "vulcanize"
+	p.Task("runPrivate", nil, func(context *do.Context) {
+		startBlockchainListener(cfg.Private(), parseIpcPath(context))
+	})
 
-		var blockchain core.Blockchain = core.NewGethBlockchain(ipcPath)
-		blockchain.RegisterObserver(core.BlockchainLoggingObserver{})
-		pgConfig := "host=" + host + " port=" + port + " dbname=" + databaseName + " sslmode=disable"
-		db, err := sqlx.Connect("postgres", pgConfig)
-		if err != nil {
-			log.Fatalf("Error connecting to DB: %v\n", err)
-		}
-		blockchain.RegisterObserver(core.BlockchainDBObserver{Db: db})
-		blockchain.SubscribeToEvents()
+	p.Task("migratePublic", nil, func(context *do.Context) {
+		connectString := cfg.DbConnectionString(cfg.Public().Database)
+		context.Bash(fmt.Sprintf("migrate -database '%s' -path ./migrations up", connectString))
+		context.Bash(fmt.Sprintf("pg_dump -O -s %s > migrations/schema.sql", cfg.Public().Database.Name))
+	})
+
+	p.Task("migratePrivate", nil, func(context *do.Context) {
+		connectString := cfg.DbConnectionString(cfg.Private().Database)
+		context.Bash(fmt.Sprintf("migrate -database '%s' -path ./migrations up", connectString))
+		context.Bash(fmt.Sprintf("pg_dump -O -s %s > migrations/schema.sql", cfg.Private().Database.Name))
+	})
+
+	p.Task("rollbackPublic", nil, func(context *do.Context) {
+		connectString := cfg.DbConnectionString(cfg.Public().Database)
+		context.Bash(fmt.Sprintf("migrate -database '%s' -path ./migrations down 1", connectString))
+		context.Bash("pg_dump -O -s vulcanize_public > migrations/schema.sql")
+	})
+
+	p.Task("rollbackPrivate", nil, func(context *do.Context) {
+		connectString := cfg.DbConnectionString(cfg.Private().Database)
+		context.Bash(fmt.Sprintf("migrate -database '%s' -path ./migrations down 1", connectString))
+		context.Bash("pg_dump -O -s vulcanize_private > migrations/schema.sql")
 	})
 
 }

README.md

@@ -9,6 +9,8 @@
  - Go 1.9+
  - https://github.com/golang/dep
     - `go get -u github.com/golang/dep/cmd/dep`
+ - https://github.com/go-godo/godo
+    - `go get -u gopkg.in/godo.v2/cmd/godo`
  - Postgres 10
 
 ### Cloning the Repository
@@ -22,15 +24,17 @@
 5. `cd $GOPATH/src/github.com/8thlight/vulcanizedb`
 6. `dep ensure`
 
-### Setting up the Development Database
+### Setting up the Databases
 
 1. Install Postgres
 2. Create a superuser for yourself and make sure `psql --list` works without prompting for a password.
 3. `go get -u -d github.com/mattes/migrate/cli github.com/lib/pq`
 4. `go build -tags 'postgres' -o /usr/local/bin/migrate github.com/mattes/migrate/cli`
-5. `createdb vulcanize`
-6. `cd $GOPATH/src/github.com/8thlight/vulcanizedb`
-7.  `./scripts/migrate`
+5. `createdb vulcanize_public`
+6. `createdb vulcanize_private`
+7. `cd $GOPATH/src/github.com/8thlight/vulcanizedb`
+8. `godo migratePublic`
+9. `godo migratePrivate`
 
 Adding a new migration: `./scripts/create_migration <migration-name>`
 
@@ -60,7 +64,7 @@ The default location for Ethereum is:
 
 1. Start a blockchain.
 2. In a separate terminal start listener (ipcDir location)
-    - `go run main.go --ipcPath /path/to/file.ipc`
+    - `godo runPublic -- --ipc-path /path/to/file.ipc`
 
 ## Running the Tests
 

config/config.go

@@ -0,0 +1,5 @@
+package config
+
+type Config struct {
+	Database Database
+}

config/database.go

@@ -0,0 +1,13 @@
+package config
+
+import "fmt"
+
+type Database struct {
+	Hostname string
+	Name     string
+	Port     int
+}
+
+func DbConnectionString(dbConfig Database) string {
+	return fmt.Sprintf("postgresql://%s:%d/%s?sslmode=disable", dbConfig.Hostname, dbConfig.Port, dbConfig.Name)
+}

config/private.go

@@ -0,0 +1,11 @@
+package config
+
+func Private() Config {
+	return Config{
+		Database: Database{
+			Name:     "vulcanize_private",
+			Hostname: "localhost",
+			Port:     5432,
+		},
+	}
+}

config/public.go

@@ -0,0 +1,11 @@
+package config
+
+func Public() Config {
+	return Config{
+		Database: Database{
+			Name:     "vulcanize_public",
+			Hostname: "localhost",
+			Port:     5432,
+		},
+	}
+}

core/blockchain_db_observer_test.go

@@ -1,8 +1,7 @@
 package core_test
 
 import (
-	"fmt"
-
+	"github.com/8thlight/vulcanizedb/config"
 	"github.com/8thlight/vulcanizedb/core"
 	"github.com/jmoiron/sqlx"
 	_ "github.com/lib/pq"
@@ -10,28 +9,22 @@ import (
 	. "github.com/onsi/gomega"
 )
 
-const (
-	host     = "localhost"
-	port     = 5432
-	user     = "postgres"
-	password = "postgres"
-	dbname   = "vulcanize"
-)
-
 var _ = Describe("Saving blocks to the database", func() {
 
 	var db *sqlx.DB
 	var err error
-	pgConfig := fmt.Sprintf(
-		"host=%s port=%d user=%s password=%s dbname=%s sslmode=disable",
-		host, port, user, password, dbname)
 
 	BeforeEach(func() {
+		pgConfig := config.DbConnectionString(config.Private().Database)
 		db, err = sqlx.Connect("postgres", pgConfig)
 		db.MustExec("DELETE FROM transactions")
 		db.MustExec("DELETE FROM blocks")
 	})
 
+	AfterEach(func() {
+		db.Close()
+	})
+
 	It("implements the observer interface", func() {
 		var observer core.BlockchainObserver = core.BlockchainDBObserver{Db: db}
 		Expect(observer).NotTo(BeNil())

scripts/create_migration

@@ -2,7 +2,7 @@
 
 if [ $# -eq 1 ]
 then
-  migrate -database postgresql://localhost:5432/postgres create -dir ./migrations -ext sql $1
+  migrate create -dir ./migrations -ext sql $1
 else
   echo "**An Error Occurred**"
   echo "Usage: ./scripts/create_migration <migration-name>"

scripts/dump_schema

@@ -1,2 +0,0 @@
-#!/bin/bash
-pg_dump -O -s vulcanize > migrations/schema.sql

scripts/migrate

@@ -1,3 +0,0 @@
-#!/bin/bash
-migrate -database 'postgresql://localhost:5432/vulcanize?sslmode=disable' -path ./migrations up
-./scripts/dump_schema

scripts/rollback

@@ -1,3 +0,0 @@
-#!/bin/bash
-migrate -database 'postgresql://localhost:5432/vulcanize?sslmode=disable' -path ./migrations down 1
-./scripts/dump_schema