[jira] [Commented] (CB-7109) exec() call to plugin blocked the main thread

["Samik R (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CB-7109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14262814#comment-14262814 ] 

Samik R commented on CB-7109:
-----------------------------

As suggested by Andrew, I tried overriding the execute method with rawArgs for one of my plugins (CordovaSQLite), but I still get the same warnings. The warnings are for delays running into ~<100ms, so may be I am fine. But I am still curious why the delay is happening.

Here is what my execute method looks like now:

==============================================
    public boolean execute (String action, final String rawArgs, CallbackContext callbackContext)
    {
        //Log.d("CordovaSQLite", "Plugin called for: " + action);

        _callbackContext = callbackContext;

        if (action.equals("openDatabase"))
        {
            cordova.getThreadPool().execute(
                new Runnable()
                {
                    @Override
                    public void run()
                    {
                        try
                        {
                            JSONArray jsonArray = new JSONArray(rawArgs);
                            String fullDBPath = jsonArray.getString(0);
                            boolean toCreate = (jsonArray.getInt(1) != 0);
                            openDatabase(fullDBPath, toCreate);
                        }
                        catch (JSONException ex){}
                    }
                }
            );
            return true;
        }
        ....
        .....
==============================================

> exec() call to plugin blocked the main thread
> ---------------------------------------------
>
>                 Key: CB-7109
>                 URL: https://issues.apache.org/jira/browse/CB-7109
>             Project: Apache Cordova
>          Issue Type: Bug
>          Components: Android, Plugin File
>    Affects Versions: 3.5.0
>            Reporter: Rajesh Kumar
>            Priority: Minor
>
> In the file plugin of v3.5.0, I constantly see a warning in logcat in eclipse when I try to write to a file. The warning is:
> THREAD WARNING: exec() call to File.write blocked the main thread for 117ms. Plugin should use CordovaInterface.getThreadPool().
> Similar issue is when I try to exit app. I guess this issue is present for all the plugins. I checked the part of File plugin code:
> final String fname=args.getString(0);
>             final String data=args.getString(1);
>             final int offset=args.getInt(2);
>             final Boolean isBinary=args.getBoolean(3);
>             threadhelper( new FileOp( ){
>                 public void run() throws FileNotFoundException, IOException, NoModificationAllowedException {
>                     long fileSize = write(fname, data, offset, isBinary);
>                     callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.OK, fileSize));
>                 }
>             }, callbackContext);
> And, threadhelper uses: 
> cordova.getThreadPool().execute(new Runnable() {
>     public void run() {}
> });
> This means, the plugin is using a thread to do some async task, but logcat throws the block warning. We need to fix this.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@cordova.apache.org
For additional commands, e-mail: issues-help@cordova.apache.org