Danny Tuppeny
6176f17f0d
There were two issues here: 1. During shutdown, when trying to unpause and resume all threads we could get "Service has Disappeared" responses if the app was already shutting down. These need ignoring. This is fixed with `_withErrorHandling` in preventBreakingAndResume. 2. The test teardown would always try to send a terminate request even if the test had already sent it, which could result in a second terminate request not being responded to (because the app shutdown before it could respond, because it had already had a terminate request). This is fixed by the teardown code only sending terminate() if it hadn't already been sent. Fixes https://github.com/dart-lang/sdk/issues/51970. Change-Id: I1baa857eb4bb7e5616fccdb193fe9213cd9452f1 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/294020 Commit-Queue: Ben Konyi <bkonyi@google.com> Reviewed-by: Ben Konyi <bkonyi@google.com>
A package used to spawn the Dart Developer Service (DDS), which is used to communicate with a Dart VM Service instance and provide extended functionality to the core VM Service Protocol.
Functionality
Existing VM Service clients can issue both HTTP, websocket, and SSE requests to a running DDS instance as if it were an instance of the VM Service itself. If a request corresponds to an RPC defined in the VM Service Protocol, DDS will forward the request and return the response from the VM Service. Requests corresponding to an RPC defined in the DDS Protocol will be handled directly by the DDS instance.
SSE Support
For certain web clients it may be preferable or required to communicate with DDS using server-sent events (SSE). DDS has an SSE handler listening for requests on /$debugHandler.
SSE and package:vm_service example
import 'package:sse/sse.dart';
import 'package:vm_service/vm_service.dart';
void main() {
// Establish connection with DDS using SSE.
final ddsChannel = SseClient('${ddsUri}\$debugHandler');
// Wait for ddsChannel to be established
await ddsChannel.onOpen.first;
// Initialize VmService using the sink and stream from ddsChannel.
final vmService = VmService(
ddsChannel.stream,
(e) => ddsChannel.sink.add(e),
);
// You're ready to query DDS and the VM service!
print(await vmService.getVersion());
}