Move closure to a method of GRPCCall

src/objective-c/GRPCClient/GRPCCall.m

@@ -415,40 +415,26 @@ static NSString * const kBearerPrefix = @"Bearer ";
 
 #pragma mark GRXWriter implementation
 
-- (void)startWithWriteable:(id<GRXWriteable>)writeable {
-  @synchronized(self) {
-    _state = GRXWriterStateStarted;
-  }
-
-  // Create a retain cycle so that this instance lives until the RPC finishes (or is cancelled).
-  // This makes RPCs in which the call isn't externally retained possible (as long as it is started
-  // before being autoreleased).
-  // Care is taken not to retain self strongly in any of the blocks used in this implementation, so
-  // that the life of the instance is determined by this retain cycle.
-  _retainSelf = self;
-
-  __weak typeof(self) weakSelf = self;
-  void (^performCall)() = ^{
-    typeof(self) strongSelf = weakSelf;
-    if (strongSelf) {
-      strongSelf->_responseWriteable = [[GRXConcurrentWriteable alloc] initWithWriteable:writeable
-                                                                           dispatchQueue:strongSelf->_responseQueue];
+- (void)startCallWithWriteable:(id<GRXWriteable>)writeable {
+  _responseWriteable = [[GRXConcurrentWriteable alloc] initWithWriteable:writeable
+                                                           dispatchQueue:_responseQueue];
 
-      strongSelf->_wrappedCall = [[GRPCWrappedCall alloc] initWithHost:strongSelf->_host
-                                                            serverName:strongSelf->_serverName
-                                                                  path:strongSelf->_path];
+  _wrappedCall = [[GRPCWrappedCall alloc] initWithHost:_host
+                                            serverName:_serverName
+                                                  path:_path];
   NSAssert(_wrappedCall, @"Error allocating RPC objects. Low memory?");
 
-      [strongSelf sendHeaders:_requestHeaders];
-      [strongSelf invokeCall];
+  [self sendHeaders:_requestHeaders];
+  [self invokeCall];
 
   // TODO(jcanizales): Extract this logic somewhere common.
-      NSString *host = [NSURL URLWithString:[@"https://" stringByAppendingString:strongSelf->_host]].host;
+  NSString *host = [NSURL URLWithString:[@"https://" stringByAppendingString:_host]].host;
   if (!host) {
     // TODO(jcanizales): Check this on init.
-        [NSException raise:NSInvalidArgumentException format:@"host of %@ is nil", strongSelf->_host];
+    [NSException raise:NSInvalidArgumentException format:@"host of %@ is nil", _host];
   }
-      strongSelf->_connectivityMonitor = [GRPCConnectivityMonitor monitorWithHost:host];
+  _connectivityMonitor = [GRPCConnectivityMonitor monitorWithHost:host];
+  __weak typeof(self) weakSelf = self;
   void (^handler)() = ^{
     typeof(self) strongSelf = weakSelf;
     [strongSelf finishWithError:[NSError errorWithDomain:kGRPCErrorDomain
@@ -458,10 +444,22 @@ static NSString * const kBearerPrefix = @"Bearer ";
   [_connectivityMonitor handleLossWithHandler:handler
                       wifiStatusChangeHandler:nil];
 }
-  };
+
+- (void)startWithWriteable:(id<GRXWriteable>)writeable {
+  @synchronized(self) {
+    _state = GRXWriterStateStarted;
+  }
+
+  // Create a retain cycle so that this instance lives until the RPC finishes (or is cancelled).
+  // This makes RPCs in which the call isn't externally retained possible (as long as it is started
+  // before being autoreleased).
+  // Care is taken not to retain self strongly in any of the blocks used in this implementation, so
+  // that the life of the instance is determined by this retain cycle.
+  _retainSelf = self;
 
   if (self.oauthToken != nil) {
     self.isWaitingForToken = YES;
+    __weak typeof(self) weakSelf = self;
     [self.oauthToken getTokenWithHandler:^(NSString *token){
       typeof(self) strongSelf = weakSelf;
       if (strongSelf && strongSelf.isWaitingForToken) {
@@ -469,12 +467,12 @@ static NSString * const kBearerPrefix = @"Bearer ";
           NSString *t = [kBearerPrefix stringByAppendingString:token];
           strongSelf.requestHeaders[kAuthorizationHeader] = t;
         }
-        performCall();
+        [strongSelf startCallWithWriteable:writeable];
         strongSelf.isWaitingForToken = NO;
       }
     }];
   } else {
-    performCall();
+    [self startCallWithWriteable:writeable];
   }
 }