VM Service isolate listing

runtime/bin/vmservice/running_isolates.dart

Index: runtime/bin/vmservice/running_isolates.dart
diff --git a/runtime/bin/vmservice/running_isolates.dart b/runtime/bin/vmservice/running_isolates.dart
new file mode 100644
index 0000000000000000000000000000000000000000..7e81f7c1bfd1d42123ecf09050f2656b0bd4c4ff
--- /dev/null
+++ b/runtime/bin/vmservice/running_isolates.dart
@@ -0,0 +1,70 @@
+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+part of vmservice;
+
+class RunningIsolates implements ServiceRequestRouter {
+  final Map<int, RunningIsolate> isolates = new Map<int, RunningIsolate>();
+
+  RunningIsolates();
+
+  void isolateStartup(SendPort sp) {
+    if (isolates[sp.hashCode] != null) {
+      throw new StateError('Duplicate isolate startup.');
+    }
+    var ri = new RunningIsolate(sp);
+    isolates[sp.hashCode] = ri;
+    ri.sendIdRequest();
+  }
+
+  void isolateShutdown(SendPort sp) {
+    if (isolates[sp.hashCode] == null) {
+      throw new StateError('Unknown isolate.');
+    }
+    isolates.remove(sp.hashCode);
+  }
+
+  void _isolateCollectionRequest(ServiceRequest request) {
+    var members = [];
+    var result = {};
+    isolates.forEach((sp, ri) {
+      members.add({
+        'id': sp,
+        'name': ri.id
+        });
+    });
+    result['type'] = 'IsolateList';
+    result['members'] = members;
+    request.setResponse(JSON.stringify(result));
+  }
+
+  bool route(ServiceRequest request) {
+    if (request.pathSegments.length == 0) {
+      return false;
+    }
+    if (request.pathSegments[0] != 'isolates') {
+      return false;
+    }
+    if (request.pathSegments.length == 1) {
+      // Requesting list of running isolates.
+      _isolateCollectionRequest(request);
+      return true;
+    }
+    var isolateId;
+    try {
+      isolateId = int.parse(request.pathSegments[1]);
+    } catch (e) {
+      request.setErrorResponse('Could not parse isolate id: $e');
+      return true;
+    }
+    var isolate = isolates[isolateId];
+    if (isolate == null) {
+      request.setErrorResponse('Cannot find isolate id: $isolateId');
+      return true;
+    }
+    // Consume '/isolates/isolateId'
+    request.pathSegments.removeRange(0, 2);
+    return isolate.route(request);
+  }
+}