lifecycle

问题 In java when we create an object of thread Thread t1 = new Thread(Runnable object); t1.start(); What are the different stages of lifecycle of thread t1 and after execution of run() will be the state of t1 ? 回答1: A thread goes through various stages in its life cycle. For example, a thread is born, started, runs, and then dies. Following diagram shows the complete life cycle of a thread. Java Thread Above-mentioned stages are explained here: New: A new thread begins its life cycle in the new

问题 I have this repetitive piece of code that will be used in more than one entity in my Symfony2 project so will be fine to apply some kind of DRY, if it's possible of course, and I'm thinking in PHP Traits. private static $preDeletedEntities;// static array that will contain entities due to deletion. private static $deletedEntities;// static array that will contain entities that were deleted (well, at least the SQL was thrown). /** * This callback will be called on the preRemove event * @ORM

问题 On low memory device I've got a problem after calling camera intent. When activity result should be received Android restart the whole app. Have anybody faced same problem? Is there any solution? 回答1: I faced the same issue a while ago: Android system stops application when launching Media Intent Apparently there is no solution, so you have to make sure that you save and restore the application state. 回答2: Well i think, the problem could be: Image byte array is too big such that it touches

问题 I found following information from the spec. But it's not clear enough for me who is not an english native. The PostPersist and PostRemove callback methods are invoked for an entity after the entity has been made persistent or removed. These callbacks will also be invoked on all entities to which these operations are cascaded. The PostPersist and PostRemove methods will be invoked after the database insert and delete operations respectively. These database operations may occur directly after

问题 When is the Rails request object available at the earliest time during the request lifecycle? Essentially, when is the request first available as a request object, and in which object? ActionDispatch ? Can you access request parameters from Tester::Application ? If so, how? If not, what about using the environment? When is that information set? 回答1: The Rack webserver creates the request object and then ActionDispatch inherits from it. So essentially, you'd be able to access the Rack::Request

问题 I've been investigating why some of my controls aren't being garbage collected and noticed it's easy to prevent simple controls that inherit from ContentControl from ever being destroyed. Here's an example: Here is my custom ContentControl: public class MyCustomControl : ContentControl { public MyCustomControl() { Debug.WriteLine("Constructed"); } ~MyCustomControl() { Debug.WriteLine("Destroyed"); } } Now if I put it on a page like so: <navigation:Page x:Class="SimpleTestBed.Views

问题 I have a bug in my code that made me think I don't fully understand the Android Lifecycle. Yes, I have read all the docs and looked at the diagrams, but they seem to talk only about when to save data, when the activity may loose focus or get killed. However, my question is if I don't need to save state, what happens to the variables & their stored values? I expected them to be destroyed to, but a bug in my code seems to indicate otherwise. In my case here is what happened. I have an activity

问题 I would like to provide a maven plugin with a custom <packaging> that provides a complex lifecycle. As part of this lifecycle, I need to run the maven-compiler-plugin 2 times in different phases with different configurations. I would like to make this packaging as simple as possible to use. The goal would be that all a consumer of this plugin would have to do is select the new packaging and not have to do any plugin execution configuration: <project> <modelVersion>4.0.0</modelVersion>

问题 I am getting into Docker and am trying to better understand how it works out there in the "real world". It occurs to me that, in practice: You need a way to version Docker images You need a way to tell the Docker engine (running on a VM) to stop/start/restart a particular container You need a way to tell the Docker engine which version of a image to run Does Docker ship with built-in commands for handling each of these? If not what tools/strategies are used for accomplishing them? Also, when

问题 Should you get data via a cursor and fill in the data on the screen, such as setting the window title, in onStart() or onResume() ? onStart() would seem the logical place because after onStart() the Activity can already be displayed , albeit in the background. Notably I was having a problem with a managed dialog that made me rethink this. If the user rotates the screen while the dialog is still open, onCreateDialog() and onPrepareDialog() are called between onStart() and onResume() . If the