try catch around things that could be null

Author: mhoeger

src/FunctionLoader.ts

@@ -30,11 +30,21 @@ export class FunctionLoader implements IFunctionLoader {
     }
 
     getInfo(functionId: string): FunctionInfo {
-      return this._loadedFunctions[functionId].info;
+      let loadedFunction = this._loadedFunctions[functionId];
+      if (loadedFunction && loadedFunction.info) {
+          return loadedFunction.info;
+      } else {
+          throw `Function info for '${functionId}' is not loaded and cannot be invoked.`;
+      }
     }
 
     getFunc(functionId: string): Function {
-        return this._loadedFunctions[functionId].func;
+        let loadedFunction = this._loadedFunctions[functionId];
+        if (loadedFunction && loadedFunction.func) {
+            return loadedFunction.func;
+        } else {
+            throw `Function code for '${functionId}' is not loaded and cannot be invoked.`;
+        }
     }
 }
 

src/Worker.ts

@@ -24,7 +24,14 @@ export function startNodeWorker(args) {
 
   let connection = `${host}:${port}`;
   systemLog(`Worker ${workerId} connecting on ${connection}`);
-  let eventStream = CreateGrpcEventStream(connection, parseInt(grpcMaxMessageLength));
+  
+  let eventStream;
+  try {
+    eventStream = CreateGrpcEventStream(connection, parseInt(grpcMaxMessageLength));
+  } catch (exception) {
+    exception.message = "Error creating GRPC event stream: " + exception.message;
+    throw exception;
+  }
 
   let workerChannel = new WorkerChannel(workerId, eventStream, new FunctionLoader());