asyncrpc: Add context manager API

Adds context manager API for the asyncrcp client class which allow
writing code that will automatically close the connection like so:

    with hashserv.create_client(address) as client:
       ...

Rework the bitbake-hashclient tool and PR server to use this new API to
fix warnings about unclosed event loops when exiting

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit d01d684a0f6398270fe35ed59b7d28f3fd9b7e41)
Signed-off-by: Steve Sakoman <steve@sakoman.com>

1 files changed, 17 insertions, 19 deletions

diff --git a/bin/bitbake-hashclient b/bin/bitbake-hashclient
index 3f265e8fa..a02a65b93 100755
--- a/bin/bitbake-hashclient
+++ b/bin/bitbake-hashclient
@@ -56,25 +56,24 @@ def main():
             nonlocal missed_hashes
             nonlocal max_time
 
-            client = hashserv.create_client(args.address)
-
-            for i in range(args.requests):
-                taskhash = hashlib.sha256()
-                taskhash.update(args.taskhash_seed.encode('utf-8'))
-                taskhash.update(str(i).encode('utf-8'))
+            with hashserv.create_client(args.address) as client:
+                for i in range(args.requests):
+                    taskhash = hashlib.sha256()
+                    taskhash.update(args.taskhash_seed.encode('utf-8'))
+                    taskhash.update(str(i).encode('utf-8'))
 
-                start_time = time.perf_counter()
-                l = client.get_unihash(METHOD, taskhash.hexdigest())
-                elapsed = time.perf_counter() - start_time
+                    start_time = time.perf_counter()
+                    l = client.get_unihash(METHOD, taskhash.hexdigest())
+                    elapsed = time.perf_counter() - start_time
 
-                with lock:
-                    if l:
-                        found_hashes += 1
-                    else:
-                        missed_hashes += 1
+                    with lock:
+                        if l:
+                            found_hashes += 1
+                        else:
+                            missed_hashes += 1
 
-                    max_time = max(elapsed, max_time)
-                    pbar.update()
+                        max_time = max(elapsed, max_time)
+                        pbar.update()
 
         max_time = 0
         found_hashes = 0
@@ -174,9 +173,8 @@ def main():
 
     func = getattr(args, 'func', None)
     if func:
-        client = hashserv.create_client(args.address)
-
-        return func(args, client)
+        with hashserv.create_client(args.address) as client:
+            return func(args, client)
 
     return 0