From 739281a727ff56912b25645e1ca3aa9d1144a201 Mon Sep 17 00:00:00 2001
From: Danny Baumann <dannybaumann@web.de>
Date: Wed, 17 Jun 2015 08:56:31 +0200
Subject: [PATCH] Don't auto-register IDLE when gaining connection.

We request a sync in this case anyway, which in turn starts the IDLE
connection anyway. If we're starting IDLE earlier, we do unnecessary
work as the sync will tear it down just a few moments later.

Change-Id: I9b99023fbe1aaab72638f6ef9d29223d9a325b7b
---
 .../android/email/service/ImapService.java    | 36 ++-----------------
 .../service/LegacyImapSyncAdapterService.java | 14 --------
 2 files changed, 3 insertions(+), 47 deletions(-)

diff --git a/provider_src/com/android/email/service/ImapService.java b/provider_src/com/android/email/service/ImapService.java
index 8a61da31b..fd65fd423 100644
--- a/provider_src/com/android/email/service/ImapService.java
+++ b/provider_src/com/android/email/service/ImapService.java
@@ -548,10 +548,9 @@ public class ImapService extends Service {
                 sExecutor.execute(new Runnable() {
                     @Override
                     public void run() {
-                        ImapService.registerAllImapIdleMailboxes(mContext, mService);
-
-                        // Since we could have missed some changes, request a sync
-                        // for the IDLEd accounts
+                        // Initiate a sync for all IDLEd accounts, since there might have
+                        // been changes while we lost connectivity. At the end of the sync
+                        // the IDLE connection will be re-established.
                         ContentResolver cr = mContext.getContentResolver();
                         Cursor c = cr.query(Account.CONTENT_URI,
                                 Account.CONTENT_PROJECTION, null, null, null);
@@ -1010,35 +1009,6 @@ public class ImapService extends Service {
         return mBinder;
     }
 
-    protected static void registerAllImapIdleMailboxes(Context context, IEmailService service) {
-        ContentResolver cr = context.getContentResolver();
-        Cursor c = cr.query(Account.CONTENT_URI, Account.CONTENT_PROJECTION, null, null, null);
-        if (c != null) {
-            try {
-                while (c.moveToNext()) {
-                    final Account account = new Account();
-                    account.restore(c);
-
-                    // Only imap push accounts
-                    if (account.getSyncInterval() != Account.CHECK_INTERVAL_PUSH) {
-                        continue;
-                    }
-                    if (!isLegacyImapProtocol(context, account)) {
-                        continue;
-                    }
-
-                    try {
-                        service.pushModify(account.mId);
-                    } catch (RemoteException ex) {
-                        LogUtils.d(LOG_TAG, "Failed to call pushModify for account " + account.mId);
-                    }
-                }
-            } finally {
-                c.close();
-            }
-        }
-    }
-
     private static void requestSync(Context context, Account account, long mailbox, boolean full) {
         final EmailServiceUtils.EmailServiceInfo info = EmailServiceUtils.getServiceInfoForAccount(
                 context, account.mId);
diff --git a/provider_src/com/android/email/service/LegacyImapSyncAdapterService.java b/provider_src/com/android/email/service/LegacyImapSyncAdapterService.java
index 1b5a36b61..2cb0e3743 100644
--- a/provider_src/com/android/email/service/LegacyImapSyncAdapterService.java
+++ b/provider_src/com/android/email/service/LegacyImapSyncAdapterService.java
@@ -18,9 +18,6 @@ package com.android.email.service;
 
 import static com.android.emailcommon.Logging.LOG_TAG;
 
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-
 import android.content.AbstractThreadedSyncAdapter;
 import android.content.ComponentName;
 import android.content.ContentProviderClient;
@@ -48,8 +45,6 @@ public class LegacyImapSyncAdapterService extends PopImapSyncAdapterService {
     // seconds for it to appear. If it takes longer than that, we will fail the sync.
     private static final long MAX_WAIT_FOR_SERVICE_MS = 10 * DateUtils.SECOND_IN_MILLIS;
 
-    private static final ExecutorService sExecutor = Executors.newCachedThreadPool();
-
     private IEmailService mImapService;
 
     private final ServiceConnection mConnection = new ServiceConnection() {
@@ -61,15 +56,6 @@ public class LegacyImapSyncAdapterService extends PopImapSyncAdapterService {
             synchronized (mConnection) {
                 mImapService = IEmailService.Stub.asInterface(binder);
                 mConnection.notify();
-
-                // We need to run this task in the background (not in UI-Thread)
-                sExecutor.execute(new Runnable() {
-                    @Override
-                    public void run() {
-                        final Context context = LegacyImapSyncAdapterService.this;
-                        ImapService.registerAllImapIdleMailboxes(context, mImapService);
-                    }
-                });
             }
         }