Allow specifying retry policy for v4 model (#696)

Author: ejizba

src/coreApi/converters/fromCoreFunctionMetadata.ts

@@ -12,6 +12,7 @@ export function fromCoreFunctionMetadata(data: coreTypes.RpcFunctionMetadata): r
         ...data,
         bindings: fromCoreBindings(data.bindings),
         status: fromCoreStatusResult(data.status),
+        retryOptions: fromCoreRetryOptions(data.retryOptions),
     };
     return ensureKeysMatch(data, result);
 }
@@ -74,3 +75,30 @@ function fromCoreBindingDirection(
             return handleDefaultEnumCase(data, 'CoreRpcBindingDirection');
     }
 }
+
+function fromCoreRetryOptions(
+    data: coreTypes.RpcRetryOptions | null | undefined
+): rpc.IRpcRetryOptions | null | undefined {
+    if (data) {
+        const result = {
+            ...data,
+            retryStrategy: fromCoreRetryStrategy(data.retryStrategy),
+        };
+        return ensureKeysMatch(data, result);
+    } else {
+        return data;
+    }
+}
+
+function fromCoreRetryStrategy(
+    data: coreTypes.RpcRetryStrategy | null | undefined
+): rpc.RpcRetryOptions.RetryStrategy | null | undefined {
+    switch (data) {
+        case 'exponentialBackoff':
+            return rpc.RpcRetryOptions.RetryStrategy.exponential_backoff;
+        case 'fixedDelay':
+            return rpc.RpcRetryOptions.RetryStrategy.fixed_delay;
+        default:
+            return handleDefaultEnumCase(data, 'CoreRpcRetryStrategy');
+    }
+}

src/coreApi/converters/toCoreFunctionMetadata.ts

@@ -12,6 +12,7 @@ export function toCoreFunctionMetadata(data: rpc.IRpcFunctionMetadata): coreType
         ...data,
         bindings: toCoreBindings(data.bindings),
         status: toCoreStatusResult(data.status),
+        retryOptions: toCoreRetryOptions(data.retryOptions),
     };
     return ensureKeysMatch(data, result);
 }
@@ -74,3 +75,30 @@ function toCoreBindingDirection(
             return handleDefaultEnumCase(data, 'RpcBindingDirection');
     }
 }
+
+function toCoreRetryOptions(
+    data: rpc.IRpcRetryOptions | null | undefined
+): coreTypes.RpcRetryOptions | null | undefined {
+    if (data) {
+        const result = {
+            ...data,
+            retryStrategy: toCoreRetryStrategy(data.retryStrategy),
+        };
+        return ensureKeysMatch(data, result);
+    } else {
+        return data;
+    }
+}
+
+function toCoreRetryStrategy(
+    data: rpc.RpcRetryOptions.RetryStrategy | null | undefined
+): coreTypes.RpcRetryStrategy | null | undefined {
+    switch (data) {
+        case rpc.RpcRetryOptions.RetryStrategy.exponential_backoff:
+            return 'exponentialBackoff';
+        case rpc.RpcRetryOptions.RetryStrategy.fixed_delay:
+            return 'fixedDelay';
+        default:
+            return handleDefaultEnumCase(data, 'RpcRetryStrategy');
+    }
+}

types-core/index.d.ts

@@ -22,7 +22,7 @@ declare module '@azure/functions-core' {
     function registerFunction(metadata: FunctionMetadata, callback: FunctionCallback): Disposable;
 
     /**
-     * A slimmed down version of `RpcFunctionMetadata` that includes the minimum amount of information needed to register a function
+     * A slimmed down version of `RpcFunctionMetadata` that includes only the properties respected as a part of the `registerFunction` api
      * NOTE: All properties on this object need to be deterministic to support the multiple worker scenario. More info here: https://github.com/Azure/azure-functions-nodejs-worker/issues/638
      */
     interface FunctionMetadata {
@@ -43,6 +43,11 @@ declare module '@azure/functions-core' {
          * A dictionary of binding name to binding info
          */
         bindings: { [name: string]: RpcBindingInfo };
+
+        /**
+         * The retry policy options
+         */
+        retryOptions?: RpcRetryOptions;
     }
 
     /**
@@ -298,6 +303,8 @@ declare module '@azure/functions-core' {
         functionId?: string | null;
 
         managedDependencyEnabled?: boolean | null;
+
+        retryOptions?: RpcRetryOptions | null;
     }
 
     interface RpcStatusResult {
@@ -352,6 +359,20 @@ declare module '@azure/functions-core' {
 
     type RpcBindingDataType = 'undefined' | 'string' | 'binary' | 'stream';
 
+    interface RpcRetryOptions {
+        maxRetryCount?: number | null;
+
+        delayInterval?: RpcDuration | null;
+
+        minimumInterval?: RpcDuration | null;
+
+        maximumInterval?: RpcDuration | null;
+
+        retryStrategy?: RpcRetryStrategy | null;
+    }
+
+    type RpcRetryStrategy = 'exponentialBackoff' | 'fixedDelay';
+
     interface RpcTypedData {
         string?: string | null;
 
@@ -508,6 +529,12 @@ declare module '@azure/functions-core' {
         nanos?: number | null;
     }
 
+    interface RpcDuration {
+        seconds?: number | Long | null;
+
+        nanos?: number | null;
+    }
+
     type RpcHttpCookieSameSite = 'none' | 'lax' | 'strict' | 'explicitNone';
     // #endregion rpc types
 }