execution will trigger the execution of subtasks once, multiple subtasks separated by commas;
16, push the MAVEN Central warehouse: will be pushed to the latest stable version of the MAVEN central warehouse, user-friendly access and use;
17, the task registration: The executor will automatically register the task periodically, the dispatch center will automatically find the registered task and trigger the
In small program development, the use of promise can significantly reduce the code, improve the simplicity of the code. The following article from the blog Park Lu Tai Leopard vernacular explain promise, the article written very well, concise and understandable, it is worth reading. The transcript is reproduced here, with a slight partial deletion.
This library is in the browser and is common in small programs. There are four main uses: use then to implement chained calls: sequentially complete
difficult to bricks without straw, some prepared ingredients, a reference menu, a set of convenient use of kitchenware is essential, I hope these essential products for our cooking to bring convenience.
ingredients, recipes and kitchenware are important.
In 2007, Microsoft announced the creation of a parallel computing platform group dedicated to simplifying the development of parallel applications. With the release of Visual Studio 2010 and the. NET Framework 4, Microsoft provides a complete s
The core architecture of Informix dynamic servers is designed to provide built-in multiple threads and parallel processing capabilities.
Multiple clues
In the database server, the Informix dynamic server uses an adjustable database server process pool called a ' virtual processor ', which is used to plan and manage the user's request. User requests are expressed through a lightweight mechanism called ' clues ', a single, coherent flow of control that expresses an independent task in the databa
the ticker, and once the corresponding thread needs to modify the tag, it responds accordingly.One advantage of this example is that it allows us to easily create large collections of individual subtasks and to monitor their behavior. In this case, we will find that as the number of subtasks increases, the number of machines displayed may be more divided, due to the way the threads are serviced.Also try to
extract: Enter a sentence, first named entity recognition, and then the identified entities 22 combinations, then the relationship classification, and finally the existence of the entity Relationship ternary group as input. The shortcomings of the pipeline method are: 1) error propagation, the error of the Entity Identification module will affect the following relationship classification performance; 2) ignores the relationships that exist between the two s
relationship type, such as the following image:
There are two main kinds of methods, one is extracting using pipelining (pipelined method) : Entering a sentence, first naming entity recognition, then 22 combination of the identified entities, then the relationship classification, Finally, the ternary group with entity relationship is used as input.
The disadvantages of pipelining methods are:
1. Error propagation, the error of the Entity Identification module will affect the following relatio
and the Processor the concept
about processes and threads
Process
is a CPU basic unit of dispatch and distribution
Threads
is the operating system for resources, including CPU , memory, disk IO ) The smallest unit assigned
Relationship
Open, the browser is a process, a process may have multiple subtasks, such as receiving information, sending information, these
thread).4.3 Other blocking: When an I/O request is made by the calling thread's sleep () or join (), the thread enters the blocking state. When the sleep () state times out, the join () waits for the thread to terminate or time out, or the I/O process completes and the thread is re-entered in a ready state.5. Death (dead)When a thread in the running state finishes a task or encounters another termination condition, it switches to the death state. Divided into natural termination and abnormal te
distractions when you use shared tasks, because tasks that have new comments but are not scheduled are not displayed. To check for new tasks, you need to switch back to categorized , re-prioritize, and then revisit the timesheet. When not in focus mode, you can use the scheduled representation to balance the task load for future work weeks-for example, by hovering over the next Week container to check how many tasks have been postponed.Create a working SetSo far, all the features described in t
it implements the Runnable interface, and it can be passed to executor for execution. To provide a singleton class, this class provides a protected constructor when creating a custom work class.SchedualfutureThis interface indicates that a delay behavior can be canceled. Usually a scheduled future is the result of a scheduled task SchedualedexecutorserviceCompletefutureA future class is the completion of the display and can be used as a completion level, triggering supported dependency function
Basic concepts process is the execution of a task, is a program and its data in the processing machine sequential execution of the activity occurs, the popular point of the Windows system each running EXE is a process, a process has multiple threads threads can be understood as subtasks that run independently in a process.Why use MultithreadingIt says that threads are sub-tasks that run independently in a process, single-threaded, that is, when a sin
, that is, the basic unit of the execution processor dispatch. If the process is understood as a task that is done logically by the operating system, then the thread represents one of many possible subtasks that complete the task. For example, if a user launches a database application in a window, the operating system represents a call to the database as a process. Suppose a user is going to generate a payroll report from a database and upload it to a
required to spend the human resources, you can also sort the web pages, improve the search engine.
(3) Web log mining in the field of E-commerce has a broad application prospects, such as the discovery of customer purchase habits and browsing interests, targeted adjustment of sales model, improve business volume.
8, usually web mining can be divided into 3 subtasks: resource discovery, information extraction, generalization.
• Resource discovery:
Memcached is a high-performance distributed memory cache server. Developed by the development team of LiveJournal, a foreign community website.Purpose of Use:Reduce the number of database accesses by caching database query results to improve the speed and scalability of dynamic Web applications.Memcache is a free and open source, high performance, distributed memory object caching system. Used to accelerate dynamic Web applications and reduce database load.Characteristics of MEMCAHCE1, based on
', [' grunt-taskname ']);};The entire code is contained within a function, using Nodejs a notation that exposes a function to be used by other files.The grunt.initconfig is used to receive configuration information for each plug-in. The configuration options for each plugin can be found on their own GitHub project pages, and are basically similar. Such as:Grunt.initconfig ({ Pkg:grunt.file.readJSON (' Package.json '), //Task name, according to the plugin's instructions to write concat: {/
Basic concept to tellWhat is synchronization? Synchronization is: If there are multiple tasks or events to occur, these tasks or events must be done individually, an event or the execution of a task will cause the entire process of temporary wait, these events can not be executed concurrently.What is async? Async is: If there are multiple tasks or events occur, these events can be executed concurrently, an event or task execution will not cause the entire process of temporary waitingFor a simple
thread classThe method must override the run () method and define the tasks that need to be implemented in the run () method.After creating the thread object, call the Start () method to start the thread. Note that instead of calling the run () method to start the thread, the Run method simply defines the task that needs to be performed, and if calling the Run method, which is equivalent to executing the Run method in the main thread, is no different from the normal method call, and does not cr
download multiple links at the same time, the browser can open multiple pages and so on. These "subtasks" within a process are referred to as threads (thread).Because each process has at least one thing to do, a process has at least a single thread, and multithreading is performed the same way as multiple processes, and is quickly switched between multiple threads by the operating system.So now there are two solutions if you want to perform multiple
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