private/mode/api: Add codegen typed Errors for RESTJSON and JSONRPC A…

…PIs (#3062) Adds code generated error types for APIs using RESTJSON and JSONRPC protocol, and modeled errors. This adds generated error types that can be typed asserted to in order to read error values in addition to Code and Message.
aws · Jan 10, 2020 · e842504 · e842504
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diff --git a/CHANGELOG_PENDING.md b/CHANGELOG_PENDING.md
@@ -1,4 +1,6 @@
 ### SDK Features
+* Add generated error types for JSONRPC and RESTJSON APIs
+  * Adds generated error types for APIs using JSONRPC and RESTJSON protocols. This allows you to retrieve additional error metadata within an error message that was previously unavailable. For example, Amazon DynamoDB's TransactWriteItems operation can return a `TransactionCanceledException` continuing detailed `CancellationReasons` member. This data is now available by type asserting the error returned from the operation call to `TransactionCanceledException` type.
 * `service/dynamodb/dynamodbattribute`: Go 1.9+, Add caching of struct serialization ([#3070](https://github.com/aws/aws-sdk-go/pull/3070))
   * For Go 1.9 and above, adds struct field caching to the SDK's DynamoDB AttributeValue marshalers and unmarshalers. This significantly reduces time, and overall allocations of the (un)marshalers by caching the reflected structure's fields. This should improve the performance of applications using DynamoDB AttributeValue (un)marshalers.
 

diff --git a/example/service/dynamodb/transactWriteItems/README.md b/example/service/dynamodb/transactWriteItems/README.md
diff --git a/example/service/dynamodb/transactWriteItems/error_handler.go b/example/service/dynamodb/transactWriteItems/error_handler.go
diff --git a/example/service/dynamodb/transactWriteItems/error_handler_test.go b/example/service/dynamodb/transactWriteItems/error_handler_test.go