simple pool

java.sql.SQLException;public class Testc3p0 {public static void Main (string[] args) {Connection conn = Dbconn.getconn ();PreparedStatement pstmt = null;ResultSet rs = null;String sql = "SELECT * from temp WHERE id = 1";try {pstmt = conn.preparestatement (sql);rs = Pstmt.executequery ();Student Student = new Student ();while (Rs.next ()) {Student.setid (Rs.getint (1));Student.setname (rs.getstring (2));}SYSTEM.OUT.PRINTLN (student);} catch (SQLException e) {TODO auto-generated Catch blockE.prin

identifier to tell the worker, not to take the task again. Then notify the worker thread that you can interrupt() , when all the threads stop and remember to stop the main thread, so that a simple task of the thread pool is complete.Let's test it out: Public classmain{ Public Static voidMain (string[] args) {threadexcutor excutor=NewThreadexcutor (3); for(inti = 0; I ) {excutor.exec (NewRunnable () {@Over

Thread pools are common in today's systems and frameworks. Understanding the thread pool's thought principle is not only a great help to learning threads. It is also helpful to understand the thread pool implementation of some systems. Here is a thread pool of my own simple implementation. A simple understanding of the

It is common for server programs to use threading technology to respond to customer requests, and you may think this is an efficient way to do it, but have you ever thought about optimizing the threading approach. This article will show you how server programs use line pool to optimize performance and provide a simple thread pool implementation. The technical ba

Tags: direct connection creat max body new NEC JS using EPO What is a database connection pool Official explanation: The database connection pool is responsible for allocating, managing, and releasing database connections, allowing applications to reuse an existing database connection instead of re-establishing one, freeing up database connections that have been idle for more than the maximum idle time to a

3. Implementation of simple JDBC Connection pool According to the principle mechanism in the second chapter, Snap-connectionpool (a simple and fast connection pooling tool) realizes the effective management function of the connection pool to the database resources according to the JDBC specification of the part. 3.1

/* Header file: threadpool. H */ # Ifndef _ tp_h_included _ # DEFINE _ tp_h_included _ # Include # Include # Include # Include # Include # Include Typedef struct worker { Void * (* process) (void * Arg ); Void * ARG; Struct worker * next; } Threadpool_item_t; Typedef struct { Pthread_mutex_t queue_lock; Pthread_cond_t queue_ready; Threadpool_item_t * queue_head; Int shutdown;/* Whether to destroy the thread pool */ Pthread_t * threadid; Int max

Org.apache.catalina.core.StandaRdhostvalve.invoke (standardhostvalve.java:128) at Org.apache.catalina.valves.ErrorReportValve.invoke ( errorreportvalve.java:104) at Org.apache.catalina.core.StandardEngineValve.invoke (standardenginevalve.java:109) At Org.apache.catalina.connector.CoyoteAdapter.service (coyoteadapter.java:261) at Org.apache.coyote.http11.Http11Processor.process (http11processor.java:844) at Org.apache.coyote.http11.http11protocol$http11connectionhandler.process (http11protocol.

Turn from: http://blog.csdn.net/wallwind/article/details/7669132 C language Simple implementation thread pool 0 Preface Online on the thread pool example is still quite a few, simple and clear is relatively few, read the information on the Internet, intends to learn some examples on the Internet, their own implementa

Recently, I was asked about the implementation of a memory pool. The key is the memory block organization. I am sorry, because I have not learned about the implementation in detail before, I only remember that the implementation of idle linked list is mentioned in the operating system, that is, linked lists are used for allocated blocks, with small blocks taking precedence and large blocks taking precedence ~~~~Later, I came back and carefully looked

Definition of thread poolThe thread pool is a form of multithreading that adds tasks to the queue during processing, and then automatically starts those tasks after the thread is created. Thread pool threads are all background threads. Each thread uses the default stack size, runs at the default priority, and is in a multithreaded apartment. If a thread is idle in managed code, such as waiting for an event,

/* Written in the previous words:Today just "Kaiyuan", chose an article about the thread pool file with you to share, hope to learn from you to help, but also hope to work with you to learn!Choose to register concurrent articles at this particular time is also some of my personal special significance, see my ID (West Tour Elementary school students. 45) just know, haha. Here is also very grateful to the blog Park staff, just send an application two mi

class. All tasks must be inherited from the ctask class.To implement the run interface, the run interface must implement the logic of the specific parsing task. M_ptrdata is a pointer to the task data. It can be a simple data type or a custom complex data type.Data type. Thread Pool class /** Thread Pool **/ Class cthreadpool After a thread

Class ThreadPool (object): def __init__ (self, max_num=20): # Create a queue with a maximum of 10 data Self.queue = queue. Queue (max_num) # populate thread classes in Queues # "Thread class, Thread class, Thread class, Thread class, Thread class, thread class, thread class" for I in range (max_num): self.queue.put ( Threading. Thread) def get_thread (self): # go to the queue to go to the data, # queue characteristics, if any, to joins t