wsky

sysctl kern.maxfiles
#kern.maxfiles: 12288
sysctl kern.maxfilesperproc
#kern.maxfilesperproc: 10240
sudo sysctl -w kern.maxfiles=1048600
#kern.maxfiles: 12288 -> 1048600
sudo sysctl -w kern.maxfilesperproc=1048576
#kern.maxfilesperproc: 10240 -> 1048576

sudo sysctl -w net.inet.tcp.rfc1323=1

wsky

//http://codebetter.com/gregyoung/2007/06/18/async-sockets-and-buffer-management/

namespace TickerPlant
{
    /// <summary>
    /// A manager to handle buffers for the socket connections
    /// </summary>
    /// <remarks>
    /// When used in an async call a buffer is pinned. Large numbers of pinned buffers
    /// cause problem with the GC (in particular it causes heap fragmentation).

wsky

//https://github.com/wsky/cross-fire/blob/master/java/src/main/java/com/taobao/top/integration/Util.java

  private static String doSign(String secret, Map<String, String> data) {
  	String[] keys = new String[data.size()];
		data.keySet().toArray(keys);
		Arrays.sort(keys);
		StringBuilder strb = new StringBuilder();
		strb.append(secret);
		for (String k : keys) {
			// data.get(k) != "" sometimes unnecessary

wsky

	// context interface to resolve env dependency
	public interface ContextService {
  		public Object get(String key);
	}

	// context base
	// alose can impl via aop inspector
	public class BizServiceAdapter implements BizInterface {
		private ContextService context;
		private BizService bizService;

wsky

//view all certificates
certmgr.msc

//http://msdn.microsoft.com/en-us/library/bfsktky3(VS.80).aspx
//make certificates
makecert -sk testcer -n "CN=testcer" -ir localmachine -ss my -sky exchange testcer.cer
makecert -r -pe -n "CN=workflowcer" -b 01/01/2005 -e 01/01/2050 -sky exchange -ss my
makecert -r -pe -n "CN=testcer" -b 01/01/2005 -e 01/01/2050 -sky exchange -ss my

wsky

public class NamedThreadFactory implements ThreadFactory {
  static final AtomicInteger poolNumber = new AtomicInteger(1);

  final AtomicInteger threadNumber = new AtomicInteger(1);
	final ThreadGroup group;
	final String prefix;
	final boolean isDaemon;
	final int priority;

	public NamedThreadFactory() {

wsky

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

// easy timer task, support delay and reset
public class ResetableTimer {
  private boolean running;
	private Thread boss;
	private ExecutorService threadPool;

	private Runnable task;

wsky

//c# byte 0-255

wsky

#!/bin/bash
#how to: . call.sh
call_api() {
local APPKEY=$1
local SECRET=$2
local SESSION=$3
local METHOD=$4
local URL=$5
local IP=$6
local SSL=$7

wsky

tcpdump -i eth0 src 10.13.3.3 and  port 7001
tcpdump -i eth0 dst 10.13.3.3 and  port 7001
tcpdump -i eth0 -A -nn dst 10.13.3.3 and  port 7001
tcpdump -i eth0 -w dump.pcap dst 10.13.3.3 and  port 7001