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Analysis of KOA Framework practice and middleware principle

(); functionNext () {//gets the current middleware, passing in the next tag, that is, when yield next processes the next middleware varGen =Gens[index] (NE); //Save the instantiated middlewareGs.push (gen); Co (gen)}functionCo (gen, data) {if(!gen)return; varresult =gen.next (data); //when the current generator

Jvm gc only generates a new generation of serial GC

1. Code 1: public class JVMTest { public static void main(String args[]) throws InterruptedException { byte [] bytes1 = new byte[1024*1024*2]; byte [] bytes2 = new byte[1024*1024*2]; byte [] bytes3 = new byte[1024*1024*4]; Thread.sleep(2000); byte [] bytes4 = new byte[1024*1024*4]; Thread.sleep(2000); }} Run Java-xms20m-xmx20m-xmn10m-XX: + useserialgc-XX: + printheapatgc-xloggc: GC. Log jvmtest. GC twice: {Heap before GC invocations=0 (full 0): d

The thread replaces the EPLL implementation principle (yield calls next when the function uses other threads to process, does not affect the main thread to continue running, next asynchronous processing thread processing using send back processing results)

1 Actual instructions for asyncFor a time-consuming process, we give it to someone else (like another thread) to execute, and we continue to work on it, and when someone else takes the time-consuming action and then feeds back the results, that's what we call async.We use an easy-to-understand threading mechanism to implement Asynchrony.2. Principle of the implementation of the co-process notationWhen using a callback function to write an asynchronous program, the code that belongs to an executi

A simple C + + demo of Thrift RPC

Thrift is an open-source, cross-lingual RPC service framework originally developed by Facebook, which Facebook submitted to the Apache Foundation in 2007. For Facebook at the time, the creation of thrift was designed to address the cross-platform nature of the large data traffic between systems in the Facebook system and the different language environments between the systems.First you need to define the. Thrift interface File:NamespaceCPPprojectstruct companyinfo{1: i32ID;2:stringname;3:stringd

Examples of PHP calling Python functions via thrift

Steps:(1) Create Thrift Syntax rules file, named Xuejiehome.thriftnamespace PHP xuejiehome_thriftnamespace Py Xuejiehome_thriftService Xuejiehome {void execute (1:string date, 2:string action)String Progress (1:string date, 2:string action)} Note: Define two callable function names and parameters, execute and progress(2) Install thrift and generate PHP corresponding class wget http://www.apache.org/dyn/closer.cgi?path=/thrift/0.9.2/thrift-0.9.2.tar.gzTar zxvf thrift-0.9.2.tar.gzCD thrift-0.9.2

JVM memory management mechanism and garbage collection mechanism __java

is a collector for service-side applications, making full use of multiple CPUs and multi-core environments. So it is a parallel and concurrent collector, and it can establish a predictable pause time model. 7. About GC types.There are only two major types of GC that are accurately classified:Partial GC: The pattern of the entire GC heap is not collectedYoung GC (Minor GC): A GC that collects only young gen (triggered when the Eden area in young

Ebuiiti. sys, qbnlwvqcimqbos. dll, jsrldzlvyunxeo. dll, jsrldzlvyunxeo. dll, etc.

Ebuiiti. sys, qbnlwvqcimqbos. dll, jsrldzlvyunxeo. dll, jsrldzlvyunxeo. dll, etc. EndurerOriginal1Version Yesterday, a netizen said that the computer's AntiVir constantly reported that the virus was working very slowly and asked him to repair it through QQ. Check the log of AntiVir, as shown in the following figure (duplicate virus items are removed ):/---Exported events: [Guard] malware foundVirus or unwanted program 'html/shellcode. gen [HTML/shellc

PSP 5.03 cracking upgrade steps

Upgrade the official 5.03 system to a self-built system, such as 5.03 Prometheus 3 Installation instructions: 1.This system targetsPSP 3000/2000 v3User, and like GEN-C, currently only available on PSP 3000 host and the Official System Version cannot be higher5.03. 2. The attack method is also based on the image scalping vulnerability. The attack sequence is to shut down completely, read the image vulnerability, and then run the system. 3. p

Follow the examples to learn protobuf-Lua

Reference: cocos2dx uses Lua and protobuf First, download the protobuf-gen-Lua plug-in. The plug-in git address is here. After the download, go to the protoc-gen-Lua \ plugin directory and create a batch file: @python E:\3rd\quick-x-protobuf\proto-gen-lua\protoc-gen-lua\plugin\protoc-

Thrift C ++ server/client development

Content transferred from: http://blog.csdn.net/hbuxiaoshe/article/details/6558391 The original text is as follows: I use C ++, so I will give a C ++ example to briefly introduce thrift's getting started. The example is described as follows: the student information (student ID, name, gender, age) is sent to the server by the client. To implement this example, we have to do the following: (1) write the. Thrift File (2) generate a CPP File (3) Compile the client (4) Compile and execute the CPP File

Ti OMAP 3530 PSP compile note (3)

and cleaned: Everything: rebuild everything including below targetsNote: C6000 code Gen tools are requiredClobber: Remove all generated filesNote: C6000 code Gen tools are required Dsplink: Configure and build DSP link for omap3530 arm and DSPNote: C6000 code Gen tools are requiredDsplink_arm: Configure and build DSP link for omap3530 armDsplink_dsp: Configure a

Programming with Tornado's Coroutine

After the release of Tornado3, the concept of coroutine was strengthened, and in asynchronous programming, it replaced the original Gen.engine and became the present gen.coroutine. This decorator is intended to simplify asynchronous programming in tornado. Avoid writing callback functions that make development more consistent with normal logical thinking. A simple example is as follows: Class Maindhandler (web. RequestHandler): @asynchronous @gen. c

Thrift C and Golang language implementations and mutual invocation methods

This is a creation in Article, where the information may have evolved or changed. Thrift's go and C language implementations Thrift File Preparation Thrift code for Go and C Server-side implementation of Go The client implementation of Go C's Client implementation Call the Go client in C code Thrift's go and C language implementations Thrift 是Facebook为了解决各系统间大数据量的传输通信以及系统之间语言环境不同而设计的一种传输框架。目前来看常用的主流语言Thrift都已经很好地支持,并且github上已经有很多实现,除了C语言之外。Thrif

Asynchronous programming using Tornado's Gen.coroutine

After the release of Tornado3, the concept of coroutine was strengthened, and in asynchronous programming, it replaced the original Gen.engine and became the present gen.coroutine. This decorator is intended to simplify asynchronous programming in tornado. Avoid writing callback functions that make development more consistent with normal logical thinking. A simple example is as follows: Class Maindhandler(Web. RequestHandler): @asynchronous @g

How to make the data that Jackson JSON generates contain Unicode encoding in Chinese

gen, char c) throws IOException {Gen.writeraw (' \ \ ');Gen.writeraw (' u ');Gen.writeraw (hex_chars[(c >>) 0xF]);Gen.writeraw (hex_chars[(c >> 8) 0xF]);Gen.writeraw (hex_chars[(c >> 4) 0xF]);Gen.writeraw (Hex_chars[c 0xF]);}private void Writeshortescape (Jsongenerator gen, char c) throws IOException {Gen.writeraw (' \ \ ');Gen.writeraw (c);}@Overridepublic void serialize (String str, Jsongenerator

Java --- summary application of design patterns

UserEbi{ @Override public boolean addUser(User user) { UserDAO userDao = UserDaoFactory.getUserDAO(); return userDao.addUser(user); } @Override public Object[] getAllUser() { UserDAO userDao = UserDaoFactory.getUserDAO(); return userDao.getAllUsers(); }} Presentation Layer: UserAddPanel class: /** UserAddPanel. java ** Created on _ DATE __, _ TIME _ */package cn. hncu. app. ui; import javax. swing. JFrame; import javax. swing. JOptionPane; import cn

Advanced Usage Analysis of the iterator and generator in Python, python Generator

changes the nature of the function: yield statements do not have to be invoke or even accessible. But the function is turned into a generator. When a function is called, its commands are executed. When a generator is called, the execution stops before the first command. Create a generator object attached to the iteration protocol by calling the generator. Like conventional functions, concurrent and recursive calls are allowed.When next is called, the function is executed to the first yield. Eac

Python generator, iteratable object, iterator difference and connection, python Generator

Python generator, iteratable object, iterator difference and connection, python Generator What is the relationship between generators, iteratable objects, and iterators? Use a picture to summarize: 1. Generator Definition Generator Method 1: // Unlike the list generator gen = [x * x for x in range (5)] gen = (x * x for x in range (5) print (gen) // Out: Method

Python multi-thread, asynchronous + multi-process crawler implementation code, python multi-thread

Python multi-thread, asynchronous + multi-process crawler implementation code, python multi-thread Install TornadoThe grequests library can be used directly, and the asynchronous client of tornado is used below. Tornado is used asynchronously, and a simple asynchronous crawling class is obtained according to the example modified in the official document. For more information, see the latest document.Pip install tornado Asynchronous Crawler #! /Usr/bin/env python #-*-coding: UTF-8-*-import timefr

Performance analysis Tools-Eclipse Memory Analyzer tool (MAT) (i)

performs GC according to Generation (generation), which is divided into young generation (younger generation), tenured generation (old age), permanent generation (permanent generation), as shown in the figure below. Perm Gen), Perm Gen (or non-heap non-heap) is a heterogeneous one that will be described later. Note that the heap space does not include Perm Gen.

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