tiagobento commented on code in PR #2887:
URL: 
https://github.com/apache/incubator-kie-tools/pull/2887#discussion_r1962549739


##########
packages/scesim-editor/src/creation/TestScenarioCreationPanel.tsx:
##########
@@ -37,45 +39,142 @@ import CubesIcon from 
"@patternfly/react-icons/dist/esm/icons/cubes-icon";
 import { useTestScenarioEditorStoreApi } from 
"../store/TestScenarioStoreContext";
 import { useTestScenarioEditorI18n } from "../i18n";
 
+import { useExternalModels } from 
"../externalModels/TestScenarioEditorDependenciesContext";
+import { ExternalDmn } from "../TestScenarioEditor";
+import { createNewDmnTypeTestScenario } from 
"../mutations/createNewDmnTypeTestScenario";
+import { createNewRuleTypeTestScenario } from 
"../mutations/createNewRuleTypeTestScenario";
+
 import "./TestScenarioCreationPanel.css";
 
 function TestScenarioCreationPanel() {
   const { i18n } = useTestScenarioEditorI18n();
+  const { onRequestExternalModelsAvailableToInclude, 
onRequestExternalModelByPath } = useExternalModels();
+  const testScenarioEditorStoreApi = useTestScenarioEditorStoreApi();
 
-  const assetsOption = [
-    { value: "", label: i18n.creationPanel.assetsOption.noChoice, disabled: 
true },
-    { value: "DMN", label: i18n.creationPanel.assetsOption.dmn, disabled: 
false },
-    { value: "RULE", label: i18n.creationPanel.assetsOption.rule, disabled: 
false },
-  ];
-
+  const [allDmnModelNormalizedPosixRelativePaths, 
setAllDmnModelNormalizedPosixRelativePaths] = useState<
+    string[] | undefined
+  >(undefined);
   const [assetType, setAssetType] = React.useState<"" | "DMN" | "RULE">("");
+  const [callBackError, setCallBackError] = useState<any>(undefined);
   const [isAutoFillTableEnabled, setAutoFillTableEnabled] = 
React.useState(true);
   const [isStatelessSessionRule, setStatelessSessionRule] = 
React.useState(false);
   const [isTestSkipped, setTestSkipped] = React.useState(false);
   const [kieSessionRule, setKieSessionRule] = React.useState("");
   const [ruleFlowGroup, setRuleFlowGroup] = React.useState("");
-  const testScenarioEditorStoreApi = useTestScenarioEditorStoreApi();
+  const [selectedDmnModel, setSelectedDmnModel] = useState<ExternalDmn | 
undefined>(undefined);
+  const [selectedDmnModelPathRelativeToThisScesim, 
setSelectedDmnModelPathRelativeToThisScesim] = useState<
+    string | undefined
+  >(undefined);
+
+  const assetsOption = [
+    { value: "", label: i18n.creationPanel.assetsOption.noChoice, disabled: 
true },
+    { value: "DMN", label: i18n.creationPanel.assetsOption.dmn, disabled: 
false },
+    { value: "RULE", label: i18n.creationPanel.assetsOption.rule, disabled: 
false },
+  ];
+
+  /** This callback retrieves all the avaiable DMN files available in the 
user's project */
+  useCancelableEffect(
+    useCallback(
+      ({ canceled }) => {
+        onRequestExternalModelsAvailableToInclude?.()
+          .then((dmnModelNormalizedPosixPathRelativePaths) => {
+            console.trace("[TestScenarioCreationPanel] The below external DMN 
models have been found");
+            console.trace(dmnModelNormalizedPosixPathRelativePaths);
+
+            if (canceled.get()) {
+              return;
+            }
+            setAllDmnModelNormalizedPosixRelativePaths(
+              dmnModelNormalizedPosixPathRelativePaths.sort((modelA, modelB) =>
+                basename(modelA).localeCompare(basename(modelB))
+              )
+            );
+          })
+          .catch((err) => {
+            setCallBackError(err);
+            console.error(
+              `[TestScenarioCreationPanel] The below error when trying to 
retrieve all the External DMN files from the project.`
+            );
+            console.error(err);
+          });
+      },
+      [onRequestExternalModelsAvailableToInclude]
+    )
+  );
+
+  /** This callback return the unmarshalled representation of a DMN model 
given its path */
+  useCancelableEffect(
+    useCallback(
+      ({ canceled }) => {
+        if (!selectedDmnModelPathRelativeToThisScesim || 
onRequestExternalModelByPath === undefined) {
+          return;
+        }
+
+        onRequestExternalModelByPath(selectedDmnModelPathRelativeToThisScesim)
+          .then((externalDMNModel) => {
+            console.trace("[TestScenarioCreationPanel] The below external DMN 
model have been loaded");
+            console.trace(externalDMNModel);
+
+            if (canceled.get() || !externalDMNModel) {
+              return;
+            }
+
+            setSelectedDmnModel(externalDMNModel);
+          })
+          .catch((err) => {
+            setCallBackError(err);
+            console.error(
+              `[TestScenarioCreationPanel] An error occurred when parsing the 
selected model '${selectedDmnModelPathRelativeToThisScesim}'. Please 
double-check it is a non-empty valid model.`
+            );
+            console.error(err);
+          });
+      },
+      [onRequestExternalModelByPath, selectedDmnModelPathRelativeToThisScesim]
+    )
+  );
+
+  /* If any error occurs during the execution of useCancelableEffect's 
callback,    */
+  /* it throws the error that will be catched by the ErrorBoundary.            
     */
+  useEffect(() => {
+    if (callBackError) {
+      throw callBackError;
+    }
+  }, [callBackError]);

Review Comment:
   What try/catch block? Sorry it seems that are multiple ones. If an error 
happens and we do something on the screen to "treat it", I think we shouldn't 
re-throw it. Not if it's really an "end of the world" type of error, I think we 
should just throw and let the first 
[ErrorBoundary](https://react.dev/reference/react/Component#catching-rendering-errors-with-an-error-boundary)
 catch it.



##########
packages/scesim-editor/src/creation/TestScenarioCreationPanel.tsx:
##########
@@ -37,45 +39,142 @@ import CubesIcon from 
"@patternfly/react-icons/dist/esm/icons/cubes-icon";
 import { useTestScenarioEditorStoreApi } from 
"../store/TestScenarioStoreContext";
 import { useTestScenarioEditorI18n } from "../i18n";
 
+import { useExternalModels } from 
"../externalModels/TestScenarioEditorDependenciesContext";
+import { ExternalDmn } from "../TestScenarioEditor";
+import { createNewDmnTypeTestScenario } from 
"../mutations/createNewDmnTypeTestScenario";
+import { createNewRuleTypeTestScenario } from 
"../mutations/createNewRuleTypeTestScenario";
+
 import "./TestScenarioCreationPanel.css";
 
 function TestScenarioCreationPanel() {
   const { i18n } = useTestScenarioEditorI18n();
+  const { onRequestExternalModelsAvailableToInclude, 
onRequestExternalModelByPath } = useExternalModels();
+  const testScenarioEditorStoreApi = useTestScenarioEditorStoreApi();
 
-  const assetsOption = [
-    { value: "", label: i18n.creationPanel.assetsOption.noChoice, disabled: 
true },
-    { value: "DMN", label: i18n.creationPanel.assetsOption.dmn, disabled: 
false },
-    { value: "RULE", label: i18n.creationPanel.assetsOption.rule, disabled: 
false },
-  ];
-
+  const [allDmnModelNormalizedPosixRelativePaths, 
setAllDmnModelNormalizedPosixRelativePaths] = useState<
+    string[] | undefined
+  >(undefined);
   const [assetType, setAssetType] = React.useState<"" | "DMN" | "RULE">("");
+  const [callBackError, setCallBackError] = useState<any>(undefined);
   const [isAutoFillTableEnabled, setAutoFillTableEnabled] = 
React.useState(true);
   const [isStatelessSessionRule, setStatelessSessionRule] = 
React.useState(false);
   const [isTestSkipped, setTestSkipped] = React.useState(false);
   const [kieSessionRule, setKieSessionRule] = React.useState("");
   const [ruleFlowGroup, setRuleFlowGroup] = React.useState("");
-  const testScenarioEditorStoreApi = useTestScenarioEditorStoreApi();
+  const [selectedDmnModel, setSelectedDmnModel] = useState<ExternalDmn | 
undefined>(undefined);
+  const [selectedDmnModelPathRelativeToThisScesim, 
setSelectedDmnModelPathRelativeToThisScesim] = useState<
+    string | undefined
+  >(undefined);
+
+  const assetsOption = [
+    { value: "", label: i18n.creationPanel.assetsOption.noChoice, disabled: 
true },
+    { value: "DMN", label: i18n.creationPanel.assetsOption.dmn, disabled: 
false },
+    { value: "RULE", label: i18n.creationPanel.assetsOption.rule, disabled: 
false },
+  ];
+
+  /** This callback retrieves all the avaiable DMN files available in the 
user's project */
+  useCancelableEffect(
+    useCallback(
+      ({ canceled }) => {
+        onRequestExternalModelsAvailableToInclude?.()
+          .then((dmnModelNormalizedPosixPathRelativePaths) => {
+            console.trace("[TestScenarioCreationPanel] The below external DMN 
models have been found");
+            console.trace(dmnModelNormalizedPosixPathRelativePaths);
+
+            if (canceled.get()) {
+              return;
+            }
+            setAllDmnModelNormalizedPosixRelativePaths(
+              dmnModelNormalizedPosixPathRelativePaths.sort((modelA, modelB) =>
+                basename(modelA).localeCompare(basename(modelB))
+              )
+            );
+          })
+          .catch((err) => {
+            setCallBackError(err);
+            console.error(
+              `[TestScenarioCreationPanel] The below error when trying to 
retrieve all the External DMN files from the project.`
+            );
+            console.error(err);
+          });
+      },
+      [onRequestExternalModelsAvailableToInclude]
+    )
+  );
+
+  /** This callback return the unmarshalled representation of a DMN model 
given its path */
+  useCancelableEffect(
+    useCallback(
+      ({ canceled }) => {
+        if (!selectedDmnModelPathRelativeToThisScesim || 
onRequestExternalModelByPath === undefined) {
+          return;
+        }
+
+        onRequestExternalModelByPath(selectedDmnModelPathRelativeToThisScesim)
+          .then((externalDMNModel) => {
+            console.trace("[TestScenarioCreationPanel] The below external DMN 
model have been loaded");
+            console.trace(externalDMNModel);
+
+            if (canceled.get() || !externalDMNModel) {
+              return;
+            }
+
+            setSelectedDmnModel(externalDMNModel);
+          })
+          .catch((err) => {
+            setCallBackError(err);
+            console.error(
+              `[TestScenarioCreationPanel] An error occurred when parsing the 
selected model '${selectedDmnModelPathRelativeToThisScesim}'. Please 
double-check it is a non-empty valid model.`
+            );
+            console.error(err);
+          });
+      },
+      [onRequestExternalModelByPath, selectedDmnModelPathRelativeToThisScesim]
+    )
+  );
+
+  /* If any error occurs during the execution of useCancelableEffect's 
callback,    */
+  /* it throws the error that will be catched by the ErrorBoundary.            
     */
+  useEffect(() => {
+    if (callBackError) {
+      throw callBackError;
+    }
+  }, [callBackError]);

Review Comment:
   What try/catch block? Sorry it seems there are multiple ones. If an error 
happens and we do something on the screen to "treat it", I think we shouldn't 
re-throw it. Not if it's really an "end of the world" type of error, I think we 
should just throw and let the first 
[ErrorBoundary](https://react.dev/reference/react/Component#catching-rendering-errors-with-an-error-boundary)
 catch it.



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