simple pool

synchronized on the Oper, the result is wrong, because at the same time access to money, plus synchronization, a moment can only have one access, so avoid the error.3. Simple understanding and application of the thread pool.The thread pool is built with Executorservice and executors to provide threads for the program, and when there are many threads, it can save a lot of memory space, the thread

Occasional opportunity to explain Druid connection pool, Up-and-comer, but the evaluation is good, in addition, because it is Ali Bao used so still pretty optimistic. Druid Set Connection pool, monitor the integration of the current project needs, the project is the SSH structure, before the use of C3P0, now a connection pool is also very

classClient { Public Static void Main(string[] args) {intNumtasks =Ten; Executorservice exec = Executors.newcachedthreadpool (); for(intI=0;iTen; i++) {Exec.execute (CreateTask (i)); } }//Define a simple task Private StaticRunnableCreateTask(FinalintTaskID) {return NewRunnable () {PrivateSocket socket =NULL;Private intport=6666; Public void Run() {System. out. println ("Task"+ TaskID +": Start");Try{socket =NewSocket ("localhost", port);

The thread pool is like... A factory receives a business (task) from outside, and it raises a certain number of workers who take the initiative to receive the task and then take charge of the implementation of the task. However, a good mechanism is needed to manage the business and workers in the factory and manage the assignment of tasks without errors. Return to the thread pool. There are several basic p

not know, anyway VC warning "non-standard extension",But an empty array is allowed in the C99.3. Alignment of the pointer travel bit operation, although any byte alignment.But generally less than 4k, because the average operating system page size is 4k, higher than 4k will be meaningless.How to: Instantiate an object. Static variables are used when global use is required.Multithreading support.The game will generally be multi-threaded, so you should support multithreading.But locking and unlock

Objective I wanted to write a test tool before, but there was no good analytical tool, so there was no motivation to write. Recently learned to use Arthas hurriedly put the pressure test tool to fill up, Crazy Crush server performance. The existing connection pool model with Netty can save the work of maintaining the connection. Originally wrote 5 classes, sorted out the code found very simple, the base cla

Public classmyDataSource {Private StaticLinkedlistNewLinkedlist(); Private Static Final intInit_connections = 10; Private Static FinalString driver_name = "Com.mysql.jdbc.Driver"; Private Static FinalString URL = ""; Private Static FinalString USER = ""; Private Static FinalString PASSWORD = ""; Static { Try{class.forname (driver_name); for(inti = 0; i ) {Connection Connection=drivermanager.getconnection (URL, USER, PASSWORD); Pool.addlast (connection); } } Catch(Except

+ "\ r \ n"; String endstring= "\ r \ n"; Bf.write (headstring); Bf.write (serverstring); Bf.write (typestring); Bf.write (lenstring); Bf.write (endstring); Bf.flush (); Note Flush4. Write a picture to the cacheSet static variables Static File file=new file ("f:\\java\\code\\myhttpserver\\lena.jpg"); Static bytearrayoutputstream bout; Static byte []b; Static int Len;Write a picture to the Byte[]b storebin=NewBufferedinputstream (Newfileinputstream (file)); //write lena.jp

Occasional opportunity to explain Druid connection pool, Up-and-comer, but the evaluation is good, in addition, because it is Ali Bao used so still pretty optimistic. Druid Set Connection pool, monitor the integration of the current project needs, the project is the SSH structure, before the use of C3P0, now a connection pool is also very

In development Community A problem that must be taken into account when a website is a concurrent request by a network user. In addition to the common means of adding cache and static html, it is also very important to optimize the tables relationship of the database and SQL statements, however, pages of users' concurrent requests often lead to SQL connection time out errors in queries of some complex services. The connection pool of the database is

Next, in the last article introduced the thread pool design requirements and use, here we analyze the concurrent package thread pool implementation class Threadpoolexecutor design, is not feel meaningless, people have realized also analysis what? Of course is to improve our own design capabilities. For the improvement of the design ability, I think we should be able to learn from the predecessors in the con

#include "common.h"#include "pool.h"#include #ifndef POOL_HHH#define POOL_HHH#include "common.h"/* simple and fast obj pool without multi-thread support */typedef uint32_t pool_size_t;typedef uint32_t pool_obj_size_t;typedef struct pool { pool_obj_size_t objsize; pool_obj_size_t objmemsize; pool_size_t num; pool_size_t free_idx; /* free list imple

In order not to let rusty, while reviewing the hand to a thread pool, the code is less than the amount, such as, with a number of C++11 implementation, language standards, is cross-platform:Thread_poo.h#ifndef _thread_pool_#define _thread_pool_#include　　Thread_pool.cpp as follows:#include "thread_pool.h" thread_pool::thread_pool (int thread_nums) {P_start = true;for (int size = 0; Size Main is as follows:#include "thread_pool.h" #include Welcome to th

This paper describes the simple realization method of C + + thread pool in detail in the form of instance. Share for everyone to use for reference. The specific methods are as follows: First, several basic thread functions: 1. Thread manipulation function: int Pthread_create (pthread_t *tidp, const pthread_attr_t *attr, (void*) (*START_RTN) (void *), void *arg);　　　　　　　　　　　　Create void Pthread_exit

Label:This example uses the threadlocal and DBCP, I think a little bit of meaning, just sort it out. With DBCP, be sure to import the Commons-dbcp.jar package. The following directly paste Dbutil code: Public classDbutil {Private StaticDataSource ds;//define a data connection pool//threadlocal is a thread's local variable, and its instance is usually the private static field in the class Private StaticThreadlocalNewThreadlocal(); Static{Propertie

The main function of this component is to process a small number of instances and implement the pooling function. A preparedstatement pool is added on the basis of this component. To use the classes in this pool, you only need to write the two methods just like the implementation classes. ============== Implementation class ================================ Package org. Koron. DB. Exchange; Import java. SQL

related implementation technology if the database resource is managed effectively in a simple way. 2. Connection Pool Technical background 2.1JDBC JDBC is a specification that follows the JDBC interface specification and each database manufacturer implements its own driver (Driver), as shown in the following illustration: When you get a database connection, you need to specify the type of driver as a

The implementation of the object pool is actually very simpleThe thought is also very simple:Use a queue to hold all objects, get an object when needed, take an object from the queue header, and then re-dedicate the object to the tail of the queue when it is exhausted.#ifndef obj_pool_h_#define obj_pool_h_#include —————————————————————————————————————————————————————————————————Write the wrong or bad place please a lot of guidance, you can leave a mes

When I used gpreftools to optimize gko_pool, I found a problem. malloc became a performance bottleneck because gko_pool allocated a 2 kb Buf for each read/write operation by default when each connection is established, this is a relatively fixed life cycle for each connection. With the 4 kb memory malloc free, you can write a "Memory Pool" that can only allocate a fixed size of memory ", the basic idea is to allocate a large memory bucket (64 MB) eac