どーも、のぶこふです。
QiitaでCorda記事はなかなか伸びないですね。
Hyperledger Fabricの方が需要はありそうな気がしますが、、、いや、私の力不足です。
めげずにもう少し続けていこうと思います。
今回は、Configファイルを読み込む処理を説明します。
公式ではこのページになります。
やるよ！！
ディレクトリ構成（略版）
cordapp-template-kotlin
+-workflows
| +-src
| +-main
| | +-kotlin/com/template/flows/MyFlows.kt
| +-config.conf
+-build.gradle
MyFlows.kt（一部抜粋）
@StartableByRPC
class GetStringConfigFlow(private val configKey: String) : FlowLogic<String>() {
object READING : ProgressTracker.Step("Reading config")
override val progressTracker = ProgressTracker(READING)
@Suspendable
override fun call(): String {
progressTracker.currentStep = READING
// configファイル（↓の「config.conf」）の読み込み
val config = serviceHub.getAppContext().config
// 引数で指定したKey(someStringValue)からValue(hello world)を取得する
return config.getString(configKey)
}
}
config.conf
someStringValue=hello world
someIntValue=1
nested: {
value: a string
}
build.gradle(一部抜粋)、nodeに cordapp(project(〜){〜〜} を追加します
task deployNodes(type: net.corda.plugins.Cordform, dependsOn: ['jar']) {
nodeDefaults {
projectCordapp {
deploy = false
}
cordapp project(':contracts')
cordapp project(':workflows')
}
node {
name "O=Notary,L=London,C=GB"
notary = [validating : false]
p2pPort 10002
rpcSettings {
address("localhost:10003")
adminAddress("localhost:10043")
}
}
node {
name "O=PartyA,L=London,C=GB"
p2pPort 10005
rpcSettings {
address("localhost:10006")
adminAddress("localhost:10046")
}
cordapp (project(':workflows')){
config project.file("src/config.conf")
}
rpcUsers = [[ user: "user1", "password": "test", "permissions": ["ALL"]]]
}
基本はコピペでOKかと思います。
実行するよ！！！！
「中身の確認をします！！」「中身はほぼテンプレのままだ。気にするな！！」
$ pwd
/cordapp-template-kotlin
$ ll
total 88
-rw-r--r-- 1 nobkovskii staff 579 6 13 16:32 LICENCE
-rw-r--r-- 1 nobkovskii staff 4798 6 13 16:32 README.md
-rw-r--r-- 1 nobkovskii staff 232 6 13 16:32 TRADEMARK
drwxr-xr-x 7 nobkovskii staff 224 6 28 15:51 build
-rw-r--r-- 1 nobkovskii staff 4487 6 28 15:50 build.gradle
drwxr-xr-x 5 nobkovskii staff 160 6 27 12:07 clients
drwxr-xr-x 4 nobkovskii staff 128 6 13 16:32 config
drwxr-xr-x 5 nobkovskii staff 160 6 28 15:51 contracts
drwxr-xr-x 3 nobkovskii staff 96 6 13 16:32 gradle
-rw-r--r-- 1 nobkovskii staff 65 6 13 16:32 gradle.properties
-rwxr-xr-x 1 nobkovskii staff 5296 6 13 16:32 gradlew
-rw-r--r-- 1 nobkovskii staff 2176 6 13 16:32 gradlew.bat
drwxr-xr-x 3 nobkovskii staff 96 6 13 16:34 logs
-rw-r--r-- 1 nobkovskii staff 57 6 13 16:32 settings.gradle
drwxr-xr-x 5 nobkovskii staff 160 6 28 15:51 workflows
「デプロイを開始します！！」「うっ！！？？！！？」「ぐぎぎぎぎぎぎぎ、ぷぎゃーーーー」
$ ./gradlew clean deployNodes
「PartyAのNodeへ移動し起動します！！」「きゅいいいいいぃぃぃぃいぃいいぃいんっっ！！！！」「ぐおんぐおんぐおんぐおん！！！」「キュインキュインキュインキュイン！！！」「ガチーンッ！！ガチーンッ！！」「DLT（分散台帳技術）Corda、起動確認しましたッ！！！」
$ cd /cordapp-template-kotlin/build/nodes/PartyA && java -jar corda.jar
______ __
/ ____/ _________/ /___ _
/ / __ / ___/ __ / __ `/ Ah, Friday.
/ /___ /_/ / / / /_/ / /_/ / My second favourite F-word.
\____/ /_/ \__,_/\__,_/
「コマンドを確認するっ！！flow list（フローリストッ！！）」
Fri Jun 28 16:09:26 JST 2019>>> flow list
com.template.flows.GetStringConfigFlow
〜他にもたくさんあるよ〜
「先程定義したGetStringConfigFlowを実行する！！」「引数を設定し、someStringValueを取得するぞ」
Fri Jun 28 16:34:10 JST 2019>>> start GetStringConfigFlow configKey: someStringValue
✅ Starting
✅ Reading config
➡️ Done
Flow completed with result: hello world
「次いでsomeIntValueだっ！！」
Fri Jun 28 16:38:41 JST 2019>>> start GetStringConfigFlow configKey: someIntValue
✅ Starting
✅ Reading config
➡️ Done
Flow completed with result: 1
「コレが最後。構造体からも取得が可能だーーー」
Fri Jun 28 16:38:54 JST 2019>>> start GetStringConfigFlow configKey: nested.value
✅ Starting
✅ Reading config
➡️ Done
Flow completed with result: a string
( ´ー｀)ﾌｩｰ．．．
雰囲気で察してください。
Errorとか
パス間違いやタイポするとエラーになります。
「うわあぁあああぁぁああああああああああああぁぁぁぁああぁぁぁああああーーーーーーーッッッ！！」
Fri Jun 28 16:44:11 JST 2019>>> start GetStringConfigFlow configKey: noPath
✅ Starting
✅ Starting
➡️ Reading config
🚫 Done
☠ Cordapp configuration is incorrect due to exception
[ERROR] 16:44:21+0900 [Node thread-1] proxies.ExceptionSerialisingRpcOpsProxy.log - Error during RPC invocation [errorCode=1ctylvw, moreInformationAt=https://errors.corda.net/OS/4.0/1ctylvw] {actor_id=internalShell, actor_owning_identity=O=PartyA, L=London, C=GB, actor_store_id=NODE_CONFIG, fiber-id=10000011, flow-id=ed669922-f809-459d-986f-b8f97b7299fa, invocation_id=683ccaa4-2061-4c1b-9122-552939d11009, invocation_timestamp=2019-06-28T07:44:21.676Z, origin=internalShell, session_id=d9c14f96-d2f0-4d50-a6ca-cf2166cecdd5, session_timestamp=2019-06-28T06:52:38.179Z, thread-id=154}
[ERROR] 16:44:21+0900 [Node thread-1] proxies.ExceptionSerialisingRpcOpsProxy.log - Error during RPC invocation [errorCode=1ctylvw, moreInformationAt=https://errors.corda.net/OS/4.0/1ctylvw] {actor_id=internalShell, actor_owning_identity=O=PartyA, L=London, C=GB, actor_store_id=NODE_CONFIG, fiber-id=10000011, flow-id=ed669922-f809-459d-986f-b8f97b7299fa, invocation_id=683ccaa4-2061-4c1b-9122-552939d11009, invocation_timestamp=2019-06-28T07:44:21.676Z, origin=internalShell, session_id=d9c14f96-d2f0-4d50-a6ca-cf2166cecdd5, session_timestamp=2019-06-28T06:52:38.179Z, thread-id=154}
[ERROR] 16:44:21+0900 [Node thread-1] proxies.ExceptionSerialisingRpcOpsProxy.log - Error during RPC invocation [errorCode=1ctylvw, moreInformationAt=https://errors.corda.net/OS/4.0/1ctylvw] {actor_id=internalShell, actor_owning_identity=O=PartyA, L=London, C=GB, actor_store_id=NODE_CONFIG, fiber-id=10000011, flow-id=ed669922-f809-459d-986f-b8f97b7299fa, invocation_id=683ccaa4-2061-4c1b-9122-552939d11009, invocation_timestamp=2019-06-28T07:44:21.676Z, origin=internalShell, session_id=d9c14f96-d2f0-4d50-a6ca-cf2166cecdd5, session_timestamp=2019-06-28T06:52:38.179Z, thread-id=154}
[ERROR] 16:44:21+0900 [Node thread-1] proxies.ExceptionSerialisingRpcOpsProxy.log - Error during RPC invocation [errorCode=1ctylvw, moreInformationAt=https://errors.corda.net/OS/4.0/1ctylvw] {actor_id=internalShell, actor_owning_identity=O=PartyA, L=London, C=GB, actor_store_id=NODE_CONFIG, fiber-id=10000011, flow-id=ed669922-f809-459d-986f-b8f97b7299fa, invocation_id=683ccaa4-2061-4c1b-9122-552939d11009, invocation_timestamp=2019-06-28T07:44:21.676Z, origin=internalShell, session_id=d9c14f96-d2f0-4d50-a6ca-cf2166cecdd5, session_timestamp=2019-06-28T06:52:38.179Z, thread-id=154}
[ERROR] 16:44:21+0900 [Node thread-1] proxies.ExceptionSerialisingRpcOpsProxy.log - Error during RPC invocation [errorCode=1ctylvw, moreInformationAt=https://errors.corda.net/OS/4.0/1ctylvw] {actor_id=internalShell, actor_owning_identity=O=PartyA, L=London, C=GB, actor_store_id=NODE_CONFIG, fiber-id=10000011, flow-id=ed669922-f809-459d-986f-b8f97b7299fa, invocation_id=683ccaa4-2061-4c1b-9122-552939d11009, invocation_timestamp=2019-06-28T07:44:21.676Z, origin=internalShell, session_id=d9c14f96-d2f0-4d50-a6ca-cf2166cecdd5, session_timestamp=2019-06-28T06:52:38.179Z, thread-id=154}
[ERROR] 16:44:21+0900 [Node thread-1] proxies.ExceptionSerialisingRpcOpsProxy.log - Error during RPC invocation [errorCode=1ctylvw, moreInformationAt=https://errors.corda.net/OS/4.0/1ctylvw] {actor_id=internalShell, actor_owning_identity=O=PartyA, L=London, C=GB, actor_store_id=NODE_CONFIG, fiber-id=10000011, flow-id=ed669922-f809-459d-986f-b8f97b7299fa, invocation_id=683ccaa4-2061-4c1b-9122-552939d11009, invocation_timestamp=2019-06-28T07:44:21.676Z, origin=internalShell, session_id=d9c14f96-d2f0-4d50-a6ca-cf2166cecdd5, session_timestamp=2019-06-28T06:52:38.179Z, thread-id=154}
[ERROR] 16:44:21+0900 [Node thread-1] proxies.ExceptionSerialisingRpcOpsProxy.log - Error during RPC invocation [errorCode=1ctylvw, moreInformationAt=https://errors.corda.net/OS/4.0/1ctylvw] {actor_id=internalShell, actor_owning_identity=O=PartyA, L=London, C=GB, actor_store_id=NODE_CONFIG, fiber-id=10000011, flow-id=ed669922-f809-459d-986f-b8f97b7299fa, invocation_id=683ccaa4-2061-4c1b-9122-552939d11009, invocation_timestamp=2019-06-28T07:44:21.676Z, origin=internalShell, session_id=d9c14f96-d2f0-4d50-a6ca-cf2166cecdd5, session_timestamp=2019-06-28T06:52:38.179Z, thread-id=154}
[ERROR] 16:44:21+0900 [Node thread-1] proxies.ExceptionSerialisingRpcOpsProxy.log - Error during RPC invocation [errorCode=1ctylvw, moreInformationAt=https://errors.corda.net/OS/4.0/1ctylvw] {actor_id=internalShell, actor_owning_identity=O=PartyA, L=London, C=GB, actor_store_id=NODE_CONFIG, fiber-id=10000011, flow-id=ed669922-f809-459d-986f-b8f97b7299fa, invocation_id=683ccaa4-2061-4c1b-9122-552939d11009, invocation_timestamp=2019-06-28T07:44:21.676Z, origin=internalShell, session_id=d9c14f96-d2f0-4d50-a6ca-cf2166cecdd5, session_timestamp=2019-06-28T06:52:38.179Z, thread-id=154}
おわり
プレミアムフライデーということで、今回は記事の雰囲気を変えてみました。
今回は以上です。
ありがとうございました。