Set GtasksInvoker username after logging in

src/googleplay/java/com/todoroo/astrid/gtasks/api/GtasksInvoker.java

@@ -25,6 +25,7 @@ import java.io.IOException;
 import java.util.Collections;
 
 import javax.inject.Inject;
+import javax.inject.Singleton;
 
 /**
  * Wrapper around the official Google Tasks API to simplify common operations. In the case
@@ -32,6 +33,7 @@ import javax.inject.Inject;
  *
  * @author Sam Bosley
  */
+@Singleton
 public class GtasksInvoker {
 
     private static final Logger log = LoggerFactory.getLogger(GtasksInvoker.class);
@@ -43,13 +45,17 @@ public class GtasksInvoker {
     @Inject
     public GtasksInvoker(@ForApplication Context context, GtasksPreferenceService preferenceService, AccountManager accountManager) {
         this.accountManager = accountManager;
-        credential = GoogleAccountCredential.usingOAuth2(context, Collections.singletonList(TasksScopes.TASKS))
-                .setSelectedAccountName(preferenceService.getUserName());
+        credential = GoogleAccountCredential.usingOAuth2(context, Collections.singletonList(TasksScopes.TASKS));
+        setUserName(preferenceService.getUserName());
         service = new Tasks.Builder(new NetHttpTransport(), new JacksonFactory(), credential)
                 .setApplicationName(String.format("Tasks/%s", BuildConfig.VERSION_NAME))
                 .build();
     }
 
+    public void setUserName(String username) {
+        credential.setSelectedAccountName(username);
+    }
+
     //If we get a 401 or 403, try revalidating the auth token before bailing
     private synchronized void handleException(IOException e) throws IOException {
         log.error(e.getMessage(), e);
@@ -118,7 +124,7 @@ public class GtasksInvoker {
                 .delete(listId, taskId));
     }
 
-    private <T> T execute(TasksRequest<T> request) throws IOException {
+    private synchronized <T> T execute(TasksRequest<T> request) throws IOException {
         String caller = getCaller();
         log.debug("{} request: {}", caller, request);
         T response;

src/googleplay/java/com/todoroo/astrid/gtasks/auth/GtasksLoginActivity.java

@@ -13,6 +13,7 @@ import android.widget.Toast;
 
 import com.todoroo.andlib.utility.DialogUtilities;
 import com.todoroo.astrid.gtasks.GtasksPreferenceService;
+import com.todoroo.astrid.gtasks.api.GtasksInvoker;
 
 import org.tasks.AccountManager;
 import org.tasks.R;
@@ -36,6 +37,7 @@ public class GtasksLoginActivity extends InjectingAppCompatActivity implements A
     @Inject GtasksPreferenceService gtasksPreferenceService;
     @Inject DialogBuilder dialogBuilder;
     @Inject AccountManager accountManager;
+    @Inject GtasksInvoker gtasksInvoker;
 
     private String accountName;
 
@@ -72,6 +74,7 @@ public class GtasksLoginActivity extends InjectingAppCompatActivity implements A
             @Override
             public void authenticationSuccessful(String accountName, String authToken) {
                 gtasksPreferenceService.setUserName(accountName);
+                gtasksInvoker.setUserName(accountName);
                 setResult(RESULT_OK);
                 finish();
                 DialogUtilities.dismissDialog(GtasksLoginActivity.this, pd);