From db40c28728a3c0effaba19f0fe68254844c16598 Mon Sep 17 00:00:00 2001
From: Emily Janzer <emily.janzer@oculus.com>
Date: Thu, 9 May 2019 15:45:27 -0700
Subject: [PATCH] Move message queue initialization in ReactContext into its
 own method

Summary: Refactoring ReactContext to move message queue initialization into its own function that can be called independently of initializeWithInstance. This allows you to create a ReactContext with message queue threads without a CatalystInstance.

Reviewed By: mdvacca

Differential Revision: D15246287

fbshipit-source-id: 4b8c53e68112af7eded47d8c31311500cc296dfe
---
 .../java/com/facebook/react/bridge/ReactContext.java  | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/ReactAndroid/src/main/java/com/facebook/react/bridge/ReactContext.java b/ReactAndroid/src/main/java/com/facebook/react/bridge/ReactContext.java
index d07d4ae28a2..3caf5efad1c 100644
--- a/ReactAndroid/src/main/java/com/facebook/react/bridge/ReactContext.java
+++ b/ReactAndroid/src/main/java/com/facebook/react/bridge/ReactContext.java
@@ -65,6 +65,17 @@ public class ReactContext extends ContextWrapper {
     mCatalystInstance = catalystInstance;
 
     ReactQueueConfiguration queueConfig = catalystInstance.getReactQueueConfiguration();
+    initializeMessageQueueThreads(queueConfig);
+  }
+
+  /**
+   * Initialize message queue threads using a ReactQueueConfiguration.
+   * TODO (janzer) T43898341 Make this package instead of public
+   */
+  public void initializeMessageQueueThreads(ReactQueueConfiguration queueConfig) {
+    if (mUiMessageQueueThread != null || mNativeModulesMessageQueueThread != null || mJSMessageQueueThread != null) {
+      throw new IllegalStateException("Message queue threads already initialized");
+    }
     mUiMessageQueueThread = queueConfig.getUIQueueThread();
     mNativeModulesMessageQueueThread = queueConfig.getNativeModulesQueueThread();
     mJSMessageQueueThread = queueConfig.getJSQueueThread();