oracle dispatch

Dispatch, dispatcher GCD provides and manages several FIFO queues (queues) and can submit tasks to these FIFO sequences in the form of blocks. GCD maintains a thread pool, and all tasks run in the thread pool.Main queue provided by the system After the system starts, a special queue is created, called the main queue ). Tasks in the main queue are sequentially executed in the main thread. (That is to say, the main thread does not necessarily have a mai

In-depth introduction to cocoa multi-thread programming block and dispatch quene Luo chaohui (http://blog.csdn.net/kesalinCC license, reproduced please indicate the source) Block is a new syntax feature that Apple expands in GCC 4.2 to support multi-core parallel programming. We can combine dispatch_queue and block to facilitate multi-thread programming. Download the source code of this article: Click to download 1. Test Project PreparationIn xcode 4

We generally use the following dispatch method:Explanation: The first sentence is asynchronous execution, the second sentence is deferred asynchronous execution, the third sentence is to run the background, and then update the UIThe dispatch_get_main_queue represents the application main thread execution, and the UI can be updated internally (without blocking the main thread) The Dispatch_get_global_queue representative runs in the background of the s

Source: https://www.cnblogs.com/yaopengfei/p/9216229.htmlI. BACKGROUNDWe in the daily development, you may encounter such a demand: "3rd per month to send users messages, remind users xxx", "0 points per day need to count the time before the time of attendance record", "1th per month to calculate the inventory situation last month", "timed initialization data for other business use", " Every 2 minutes round the inquiries database to see if a business is audited, and prompts the user "and so on."

, any user can access the database through the browser, thus overcomes the time and the space limit. Figure 1 b/S Mode works: The client browser accesses the Web server through the URL, the Web server requests the database server, and returns the resulting results to the client browser in HTML form. 　　 Functional Modules The system can be divided into several sub modules based on the integration of receiving and sending documents. (1) System Management As a system administrator, he can m

Remember that polymorphism can only be represented by method calls, so if you want to make the double dispatch correct, you must perform two method calls: In each structure, one is used to determine the type. In the trash structure, a new method is invoked to invoke Addtobin (), which takes a parameter that is an array composed of Typebin. The method will iterate through the array, trying to add itself to the appropriate garbage cans, where the doubl

Introduced:The Grand Central Dispatch abbreviation (GCD) is the technology developed by Apple to optimize applications that support multi-core processors and other symmetric multi-processing systems. This is based on the thread pool pattern that the task executes in parallel. It was first released on Mac OS X 10.6, and IOS 4 and above are also available.Design:GCD works by allowing programs to queue in parallel to specific tasks, scheduling them to pe

As a result of labor law and some business rules system has not been improved, resulting in labor workers to taste the loss and unhappiness, but due to media exposure has been related to the Department of follow-up let labor workers see the future of hope.1. New regulations for Labor DispatchNotice request, all levels of social department to implement the Ministry of Labor Department, "Administrative Licensing implementation Measures", in accordance with the "Who approval, who supervision, who i

The Grand Central Dispatch abbreviation (GCD) is the technology developed by Apple to optimize applications that support multi-core processors and other symmetric multi-processing systems. This is based on the thread pool pattern that the task executes in parallel. It was first released on Mac OS X 10.6, and IOS 4 and above are also available.Design:GCD works by allowing programs to queue in parallel to specific tasks, scheduling them to perform tasks

Fully fair scheduling class is an example of scheduling class static const struct Sched_class Fair_sched_class = { . Next = idle_sched_class, . Enqueue_task = Enqueue_task_fair, . Dequeue_task = Dequeue_task_fair, . Yield_task = Yield_task_fair, . Check_ Preempt_curr = Check_preempt_wakeup, . Pick_next_task = Pick_next_task_fair, . Put_prev_task = Put_prev_task_fair, . Set_curr_task = Set_curr_task_fair,. Task_ti

Grand Central Dispatch (GCD) for iOS multi-thread programming)Introduction: Grand Central Dispatch (GCD) is a technology developed by Apple to optimize applications that support multi-core processors and other systems of Symmetric Multi-processing systems. This is based on the Thread Pool Mode for concurrent task execution. It is released on Mac OS X 10.6 For the first time, and is also available for iOS 4

The core of GCD programming is the dispatch queue, where the execution of the dispatch block is eventually put into a queue, similar to Nsoperationqueue but more complex and powerful, and can be nested. So, combining the GCD of block implementation, the feature of function closure (Closure) is fully played. There are several ways in which dispatch queues can be

Grand Central Dispatch (GCD) is a powerful way to perform multithreaded tasks, whether you are asynchronous or synchronous at the time of the callback, and you can optimize the application to support multi-core processors and other symmetric multi-processing systems. In the process of development, only the tasks to be executed and added to the appropriate dispatch queue, GCD can generate the necessary threa

1,swift continues to use Object-c's original set of threads, including three multithreaded programming techniques:(1) Thread(2) Cocoa operation (operation and Operationqueue)(3) Grand Central Dispath (GCD)2, this article highlights the Grand Central Dispath (GCD)GCD is a multi-core programming solution developed by Apple, the basic concept is the dispatch queue, which is an object that accepts tasks and executes them in first-to-first-run order. The

Purpose of Use: Current activity can respond directly to an NFC tag without requiring the user to choose all the activity that can be handled.Steps to use:First step: In the OnCreate () method// NFC Front-desk dispatch system Private null;.........// initializes the pendingintent, and when an NFC device is connected, it is given to the current activity processingPendingintent = pendingintent.getactivity (Thisnew Intent (This, GetClass ()). Addflags

When talking about dispatch routines, you must understand the concept of IRP (I/O Request package), that is, the important data structure of "input/output request package. After ring3 sends an I/O Request to the driver through functions such as deviceiocontrol, the operating system converts the request to the IRP data structure in the kernel and sends the request to the dispatch Letter of the corresponding

Introduction: Grand Central Dispatch (GCD) is a technology developed by Apple to optimize applications that support multi-core processors and other systems of Symmetric Multi-processing systems. This is based on the Thread Pool Mode for concurrent task execution. It is released on Mac OS X 10.6 For the first time, and is also available for iOS 4 and later versions.Design: GCD works as follows: allows programs to queue specific tasks in parallel and sc

DetailsIOS developmentApplicationConcurrent Dispatch QueuesThis document introduces almost all tasks completed by threads in the scheduling queue. The scheduling queue is simpler, easier to use, and more efficient than the thread code. The following describes how to use a scheduling queue to execute tasks in an application. 1. about scheduling queues All scheduling queues are first-in-first-out queues. Therefore, the Starting sequence of tasks in the

follows: [Java]View plaincopy Public void method (Father ){ If (father instanceof son1 ){ Method (son1) Father ); } Else if (father instanceof son2 ){ Method (son2) Father ); } Else if (father instanceof father ){ System. Out. println ("this is Father's method "); } } Please note that we must put the condition for determining whether the class is a parent class (that is, the condition for determining whether the class is a father class) At the end, otherwise it will be regarded as a

Differences between render, redirect, and dispatch in CakePHP. csdn. in CakePHP, netkunshan_shenbinarticledetails6221219 redirects to three commonly used functions: render, redirect, dispatch1, and render functions publicfunctionrender (render, redirect, and dispatch in CakePHP ). Http://blog.csdn.net/kunshan_shenbin/article/details/6221219 In CakePHP, the three functions that are frequently used for jump a