Add state repr and server kill command

panel/io/server.py

@@ -5,6 +5,7 @@
 
 import signal
 import threading
+import uuid
 
 from functools import partial
 
@@ -77,10 +78,9 @@ def get_server(panel, port=0, websocket_origin=None, loop=None,
             websocket_origin = [websocket_origin]
         opts['allow_websocket_origin'] = websocket_origin
 
-    server_id = kwargs.pop('server_id', None)
+    server_id = kwargs.pop('server_id', uuid.uuid4().hex)
     server = Server({'/': partial(panel._modify_doc, server_id)}, port=port, **opts)
-    if server_id:
-        state._servers[server_id] = (server, panel, [])
+    state._servers[server_id] = (server, panel, [])
 
     if show:
         def show_callback():

panel/io/state.py

@@ -36,9 +36,23 @@ class _state(param.Parameterized):
     # An index of all currently active views
     _views = {}
 
-    # An index of all curently active servers
+    # An index of all currently active servers
     _servers = {}
 
+    def __repr__(self):
+        server_info = []
+        for server, panel, docs in self._servers.values():
+            server_info.append("{}:{:d} - {!r}".format(
+                server.address or "localhost", server.port, panel)
+            )
+        return "state(servers=\n  {}\n)".format(",\n  ".join(server_info))
+
+    def kill_all_servers(self):
+        """Stop all servers and clear them from the current state."""
+        for server_id in self._servers:
+            self._servers[server_id][0].stop()
+        self._servers = {}
+
     def _unblocked(self, doc):
         thread = threading.current_thread()
         thread_id = thread.ident if thread else None