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<?xml version="1.0" encoding="UTF-8"?>
<!-- <configuration debug="true"> 调试模式下，可输出logback的内部日志信息 -->
<configuration debug="false">


  <!-- 控制台输出 -->
  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
      <!--格式化输出：%d表示日期，%thread表示线程名，%-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符 [%file:%line]日志所在文件及行数 %msg%n消息及换行-->
      <pattern>%d{yyyy-MM-dd HH:mm:ss} [%level][%thread]:%logger{50} [%method:%line] %msg%n</pattern>

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<?xml version="1.0" encoding="UTF-8"?>
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
    <localRepository>/opt/devtools/maven/repo</localRepository>
    <mirrors>
        <mirror>
            <id>maven-aliyun-mirror</id>
            <name>maven-aliyun-mirror</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public/</url>

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  // --------------------------------------------------- Acceptor Inner Class
    /**
     * The background thread that listens for incoming TCP/IP connections and
     * hands them off to an appropriate processor.
     */
    protected class Acceptor extends AbstractEndpoint.Acceptor {

        @Override
        public void run() {

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 /**
         * The background thread that listens for incoming TCP/IP connections and
         * hands them off to an appropriate processor.
         */
        @Override
        public void run() {
            // Loop until destroy() is called
            while (true) {
                try {
                    // Loop if endpoint is paused

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    @Override
    public AsyncContext startAsync(ServletRequest request,
            ServletResponse response) {
        if (!isAsyncSupported()) {
            throw new IllegalStateException(sm.getString("request.asyncNotSupported"));
        }

        if (asyncContext == null) {
            asyncContext = new AsyncContextImpl(this);
        }

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wget http://repos.fedorapeople.org/repos/dchen/apache-maven/epel-apache-maven.repo -O /etc/yum.repos.d/epel-apache-maven.repo
yum install apache-maven

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acquire lock on object state
while (precondition does not hold) {
  release lock
  wait until precondition might hold
  optional fail if interrupted or timeout expires
  require lock
}
perform action
    release lock

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目的

• 了解JAVA程序性能调优的过程、原理以及常见方法；在这方面做到“知道自己不知道”；
• 不用了解太多细节，这些细节的学习需要结合大量实践，只能有机会再深入。

---

TODO/疑问

• 为什么优化GC时，要按照“确定内存需求" -> "延迟调优" -> "吞吐量调优"的顺序？ 是因为这些指标之间存在该顺序表明的依赖关系？
• 如何定义性能需求？

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git config --global alias.oa '!zsh -c '\''diff --old-line-format='' --new-line-format='' <(git rev-list --first-parent "${1:-master}") <(git rev-list --first-parent "${2:-HEAD}") | head -1'
git config --global alias.branchdiff '!sh -c "git diff `git oa`.."'
git config --global alias.branchlog '!sh -c "git log `git oa`.."'

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import com.fasterxml.jackson.annotation.JsonPropertyOrder;
import com.fasterxml.jackson.databind.ObjectWriter;
import com.fasterxml.jackson.dataformat.csv.CsvMapper;
import com.fasterxml.jackson.dataformat.csv.CsvSchema;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;