Avoid wipeout of content on restart with opened editors

CHANGELOG.md

@@ -3,6 +3,7 @@
 - Keep `Kaoto backend` output log available when Kaoto backend native executable cannot be launched. It allows to have more information what can be the issue.
 - Upgrade embedded Kaoto [UI](https://github.com/KaotoIO/kaoto-ui/releases/tag/v0.6.1) to 0.6.1 and [backend](https://github.com/KaotoIO/kaoto-backend/releases/tag/v0.6.2) to 0.6.2
 - Open Kaoto editor by default for `*.camel.(yaml|yml)` files
+- Avoid wipeout of content on restart with opened editors #144
 
 # 0.2.0
 

package.json

@@ -39,6 +39,7 @@
     "@kie-tools-core/workspace": "^0.26.0",
     "@patternfly/react-core": "4.267.6",
     "@redhat-developer/vscode-redhat-telemetry": "^0.5.4",
+    "async-wait-until": "^2.0.12",
     "react": "18.2.0",
     "react-dom": "18.2.0"
   },

src/extension/extension.ts

@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+import { waitUntil } from 'async-wait-until';
 import { backendI18nDefaults, backendI18nDictionaries } from "@kie-tools-core/backend/dist/i18n";
 import { VsCodeBackendProxy } from "@kie-tools-core/backend/dist/vscode";
 import { EditorEnvelopeLocator, EnvelopeContentType, EnvelopeMapping } from "@kie-tools-core/editor/dist/api";
@@ -31,6 +32,7 @@ let telemetryService: TelemetryService;
 
 let backendProcess: child_process.ChildProcessWithoutNullStreams | undefined;
 let kaotoBackendOutputChannel: vscode.OutputChannel | undefined;
+let kaotoBackendWarmedUp: boolean = false;
 
 export async function activate(context: vscode.ExtensionContext) {
   console.info("Kaoto Editor extension is alive.");
@@ -57,6 +59,9 @@ export async function activate(context: vscode.ExtensionContext) {
     if (kaotoBackendOutputChannel) {
       const dec = new TextDecoder("utf-8");
       const text = dec.decode(data);
+      if (!kaotoBackendWarmedUp && text.includes('Catalog class io.kaoto.backend.api.metadata.catalog.StepCatalog_Subclass warmed up in')) {
+        kaotoBackendWarmedUp = true;
+      }
       kaotoBackendOutputChannel.append(text);
     }
   });
@@ -71,6 +76,12 @@ export async function activate(context: vscode.ExtensionContext) {
   const backendI18n = new I18n(backendI18nDefaults, backendI18nDictionaries, vscode.env.language);
   backendProxy = new VsCodeBackendProxy(context, backendI18n);
 
+  try {
+    await waitUntil(() => kaotoBackendWarmedUp, { timeout: 30000});
+  } catch {
+    kaotoBackendOutputChannel.append('Kaoto backend failed to warm up in 30 seconds.\n');
+  }
+
   KogitoVsCode.startExtension({
     extensionName: "redhat.vscode-kaoto",
     context: context,
@@ -88,8 +99,6 @@ export async function activate(context: vscode.ExtensionContext) {
     ]),
     backendProxy: backendProxy,
   });
-
-  console.info("Extension is successfully setup.");
 
   const redhatService = await getRedHatService(context);  
   telemetryService = await redhatService.getTelemetryService();
@@ -106,6 +115,7 @@ function getBinaryName(): string {
 }
 
 export function deactivate() {
+  kaotoBackendWarmedUp = false;
   if (backendProcess !== undefined) {
     if (kaotoBackendOutputChannel !== undefined) {
       kaotoBackendOutputChannel.append(`Kaoto backend is stopped during VS Code extension deactivation.`);

yarn.lock

@@ -1099,6 +1099,11 @@ assertion-error@^1.1.0:
   resolved "https://registry.yarnpkg.com/assertion-error/-/assertion-error-1.1.0.tgz#e60b6b0e8f301bd97e5375215bda406c85118c0b"
   integrity sha512-jgsaNduz+ndvGyFt3uSuWqvy4lCnIJiovtouQN5JZHOKCS2QuhEdbcQHFhVksz2N2U9hXJo8odG7ETyWlEeuDw==
 
+async-wait-until@^2.0.12:
+  version "2.0.12"
+  resolved "https://registry.yarnpkg.com/async-wait-until/-/async-wait-until-2.0.12.tgz#8a94683bf29e74642a8bcbb9385f6ea330d4383f"
+  integrity sha512-SXy/vDs6UPJMG6YeEYOQ4ilA/JnGxk187KPGqFx9O+qVxsjkSl+jH+3P50qSNyMpEmDgr8qOFGOKCJckWb1i7A==
+
 async@^2.6.4:
   version "2.6.4"
   resolved "https://registry.yarnpkg.com/async/-/async-2.6.4.tgz#706b7ff6084664cd7eae713f6f965433b5504221"