kafka producer and consumer

Producer Consumer Producers create data, control traffic through intermediaries, and deliver it securely to consumers.Applicable environment The speed of producer production data is inconsistent with the speed with which consumers process data, and intermediaries adjust the data pressure of consumers by caching and blocking. Sample Example

Design Patterns and concurrent producer-consumer patternsProducer-consumer mode is a classic multithreaded design pattern. It provides a good solution for collaboration between multiple threads.In producer-consumer mode, typically consists of two types of threads, that is, s

With Arrayblockingqueue, it is easy to implement both producer and consumer, and all consumer threads share resources arrayblockingqueue objects for thread safety. The producer thread searches the current directory and subdirectories and adds the corresponding file object to the queue , the

, will lock to consumers, consumers start spending, when no product can be consumed, consumers wait, The lock is given to the producer and the producer begins production. Define the total production cap max_produce and the maximum capacity per producer (upper limit) max_signle_produce and the maximum amount of consumption per

1, the contradiction between producer and consumer model is the imbalance of data supply and demandImport TimeImportRandom fromMultiprocessingImportQueue fromMultiprocessingImportProcessdefproducer (Q,food): forIinchRange (5): Q.put ('%s-%s'%(food,i))Print('Production of%s'%Food ) Time.sleep (Random.random ()) q.put (none) Q.put (None) Q.put (none) #有三个消费者因此需要三个信号defConsumer (q,name): whileTrue:food=Q.get (

can only bind one object.It is because lock can bind multiple objects that it realizes waking only the thread of the party without waking the other thread.The practice is to define two condition objects, an object representing the producer, an object representing the consumer, waking the thread with the producer's object, waking the producer's thread, and the same consumer's thread that wakes up the consum

Use Win32API to synchronize producer and consumer threads Use win32 API to create a thread and create a semaphore for Thread Synchronization Create semaphores Syntax: HANDLE semophore;semophore = CreateSemaphore(lpSemaphoreAttributes, lInitialCount, lMaximumCount, lpName); The following is a prototype of the CreateSemophore function: Handle winapi CreateSemaphore (_ In_opt _ LPSECURITY_ATTRIBUTES lpSema

Package cn.test.hf.test3;Import java.util.concurrent.locks.Condition;Import Java.util.concurrent.locks.ReentrantLock;public class Factoryutils {Private Resource Resource;private int producerid = 1;Can be re-entered lockReentrantlock lock = new Reentrantlock ();Condition producerscondition = Lock.newcondition ();Condition customerlockcondition = Lock.newcondition ();Factoryutils () {Resource = new resource ();Resource.setid (0);Resource.setflag (TRUE);}/*** Production*/public void Producerresourc

Tags: User ase mode Cache code log SHM nbsp inf1.1 RequirementsDatabase 3 million user data, traverse get all users, various combinations associated, get to a new JSON, save to Redis.1.2 DifficultiesDatabase is much more, it is impossible to single-threaded query all the data to memory.1.3 SolutionsMulti-threaded reading, the producer gets 200 data each time, the consumer goes to consume. (This is mainly ba

(canrun) to determine whether the "running status" is used. Thread-based class (CODE) Package COM. fox. producerconsumer; 6. producer: The producer produces goods under certain conditions (containers are not satisfied) and stores the goods in the database. After an action is completed, yield will notify the "top-up" task to complete, to prevent continuous production, tired of working. Joke!

Thread communication example-producer consumer issuesThis kind of problem describes a situation, assume that the warehouse can only store one product, the producer will produce the product into the warehouse, the consumer will take away the product of the warehouse. Assuming there is no product in the warehouse, the

In the previous producer consumer program, the data produced by the producer at a time can be read multiple times by the consumer. Obviously, this does not meet our requirements. In this regard, the above procedures are improved: 1) The producer produces data once and the

Java_Thread producer and consumer Demo, java_threaddemo 1 package com. bjsxt. thread. demo; 2 public class ProducerConsumer {3/** 4 * producer and consumer 5 * @ param args 6 */7 public static void main (String [] args) {// simulate thread 8 SyncStack ss = new SyncStack (); 9 Produ