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原创 统一异常处理
统一项目数据格式，统一异常管理便于更好的定位项目问题。 由于自我实现有项目业务原因，把主要的接口与思路分享，可自由实现自我适合的业务异常链路。 核心思路：类似于filter责任链处理方式。 chain ：管理handler执行链路 handler：处理特定异常的处理器（我使用自定义处理标记处理器）；abs...
2018-03-04 22:30:35
457
原创 springboot-mybatis—多数据源
工作老系统添加新的功能 需要调用其他数据库的资源，应用多数据源，老大只给一晚上解决，哎，总算是磨出来（看了很多好的博客），我也记录一篇，也给后人方便。 原理简单说明，详细请看代码分析。 1. 配置多个数据源 =》 每个数据源一个key。 2. 将多个数据源注入到DynmicDataSource（自己定义，必须实现AbstractRoutingDataSource）。 3. 设置默认数据
2017-04-18 23:46:28
2976
原创 leetcode-month3-week10
Two Sum II Input array is sortedpackage ygy.test.week10;import java.util.HashMap;import java.util.Map;/** * Created by guoyao on 2017/11/4. */public class TwoSumIIInputarrayissorted { public int
2017-11-05 16:42:49
360
原创 concurrent-7-AQS-CountDownLatch，CyclicBarrier
CountDownLatchCountDownLatch#tryAcquireShared protected int tryAcquireShared(int acquires) { return (getState() == 0) ? 1 : -1; //获取状态是不是达到条件 }CountDownLatch#tryReleaseSharedpro
2017-10-29 19:26:26
322
原创 leetcode-month2-week9
Best Time to Buy and Sell Stock IIpackage ygy.test.week9;/** * Created by guoyao on 2017/10/27. */public class BestTimetoBuyandSellStockII { public static void main(String[] args) { int[]
2017-10-29 15:29:24
305
原创 concurrent-6-AQS-Semaphore
Semaphore#acquire public void acquire() throws InterruptedException { sync.acquireSharedInterruptibly(1); //请求资源 }AQS#acquireSharedInterruptibly public final void acquireSharedInterruptib
2017-10-28 22:57:43
314
原创 concurrent-5-AQS-ReentrantReadWriteLock
ReentrantReadWriteLock#WriteLock#lockpublic void lock() { sync.acquire(1); //尝试获取资源 }ReentrantReadWriteLock#tryAcquire protected final boolean tryAcquire(int acquires) {
2017-10-27 00:06:31
216
原创 leetcode-month2-week8
Path Sumpackage ygy.test.week8;import java.util.LinkedList;import java.util.Queue;/** * Created by guoyao on 2017/10/20. */public class PathSum { public static void main(String[] args) {
2017-10-22 17:41:52
249
原创 concurrent-5-AQS-Condition
等待await public final void await() throws InterruptedException { if (Thread.interrupted()) //响应中断 throw new InterruptedException(); Node node = addConditionWaite
2017-10-21 20:04:55
260
原创 leetcode-month2-week7
Binary Tree Level Order Traversal IIpackage ygy.test.week7;import java.util.*;/** * Created by guoyao on 2017/10/13. */public class BinaryTreeLevelOrderTraversalII { public static void main(Strin
2017-10-15 14:51:07
260
原创 拓扑排序-Dijkstra算法
package com.ygy.test.sort;import lombok.Getter; import lombok.Setter; import org.springframework.util.CollectionUtils;import java.util.*;/** * Created by guoyao on 2017/10/11. *///拓扑排序 public cl
2017-10-13 16:18:26
772
原创 拓扑排序-bfs-广度优先搜索
breadth-first searchpackage com.ygy.test.sort;import lombok.Getter;import lombok.Setter;import org.springframework.util.CollectionUtils;import java.util.*;/** * Created by guoyao on 2017/10/11. *//
2017-10-12 16:49:15
858
原创 Java Perfomance
cpu使用率监控vmstat 指令#所有虚拟处理器的总cpu使用率统计mpstat#每个虚拟处理器的cpu使用率，判断是否均匀使用cputop#包含cpu使用率及进程统计数据和内存使用率
2017-10-11 17:24:58
225
原创 拓扑排序-简单实现
package com.ygy.test.sort;import lombok.Getter;import lombok.Setter;import org.springframework.util.CollectionUtils;import java.util.*;/** * Created by guoyao on 2017/10/11. *///简单的拓扑排序public clas
2017-10-11 16:52:49
278
原创 leetcode-month2-week6
Merge Sorted Arraypackage ygy.test.week6;/** * Created by guoyao on 2017/10/7. */public class MergeSortedArray { public static void main(String[] args) { } //从大到小的倒序排序 public static vo
2017-10-08 14:04:54
199
原创 PriorityQueue-数组（二叉堆）
field //默认初始化大小 private static final int DEFAULT_INITIAL_CAPACITY = 11; //队列内置为数组，实际为数据结构中的二叉堆 transient Object[] queue; // non-private to simplify nested class access //容量大小
2017-10-03 19:59:55
763
原创 leetcode-month2-week5
Add Binarypackage ygy.test.week5;/** * Created by guoyao on 2017/10/1. */public class AddBinary { public static void main(String[] args) { System.out.println(addBinary("1","111")); }
2017-10-02 22:45:55
244
原创 leetcode-month1-week4
Count and Saypackage ygy.test.week4;/** * Created by guoyao on 2017/9/24. */public class CountandSay { public static void main(String[] args) { System.out.println(countAndSay(4)); }
2017-09-24 18:53:56
254
原创 leetcode-month1-week3
Valid Parenthesespackage ygy.test.week3;import java.util.Stack;/** * Created by guoyao on 2017/9/15. */public class ValidParentheses { public static void main(String[] agrs) { System.out.p
2017-09-20 15:30:15
220
原创 leetcode-month1-week2
Longest Copackage ygy.test.week2;/** * Created by guoyao on 2017/9/10. */public class LongestCommonPrefix { public static void main(String[] args) { String [] arrs = {"abc","abcd","abcde",
2017-09-20 15:26:38
220
原创 leetcode-month1-week1
Add Two Numberspackage ygy.test.week1;/** * Created by guoyao on 2017/9/3. */public class AddTwoNumbers { /** * You are given two non-empty linked lists representing two non-negative integer
2017-09-20 15:22:42
213
原创 springboot-cloud-8-ribbon-source
LoadBalancerAutoConfiguration 定制个性化的restTemplate//定制个性化 restTemplate @Bean public SmartInitializingSingleton loadBalancedRestTemplateInitializer( final List customizers) {
2017-09-15 10:21:24
565
原创 springboot-cloud-7-eureka-source
pre start 开始EnableEurekaClient注解@Target({ElementType.TYPE})@Retention(RetentionPolicy.RUNTIME)@Documented@Inherited// 导入EnableDiscoveryClientImportSelector 配置@Import({EnableDiscoveryClien
2017-09-14 15:55:24
285
原创 zookeeper-curator-interprocessmutex
constructorInterProcessMutex(CuratorFramework client, String path, String lockName, int maxLeases, LockInternalsDriver driver) { basePath = PathUtils.validatePath(path); intern
2017-09-08 17:45:49
1359
原创 zookeeper-curator-leaderSelector
NodeCache constructor/** 初始化参数 * @param client curztor client 客户端 * @param path the full path to the node to cache 节点路径 * @param dataIsCompressed if true, data in the path i
2017-09-04 23:39:52
977
原创 zookeeper-curator
Curator_Startpackage test.ygy.curator;import org.apache.curator.RetryPolicy;import org.apache.curator.framework.CuratorFramework;import org.apache.curator.framework.CuratorFrameworkFactory;im
2017-08-31 17:33:29
405
原创 zookeeper-crud
//安装zookeeper 3台vm本地ip 130 132 133[root@localhost ~]# mkdir -p /usr/local/software[root@localhost ~]# mv zookeeper-3.4.5.tar.gz /usr/local/software/[root@localhost ~]# cd /usr/local/software/[ro
2017-08-25 23:31:02
492
原创 springboot-cloud-6-config
configapplication.propertiesserver.port=8005spring.application.name=config-server###git仓库地址spring.cloud.config.server.git.uri= https://github.com/github-ygy/spring_cloud_test####git 相对目录地址
2017-08-19 18:07:01
664
原创 springboot-cloud-5-zuul
zuulapplication.propertiesserver.port= 8004spring.application.name=zuul-master###配置zuul路由zuul.routes.service-a.path= /service-a/**zuul.routes.service-a.serviceId = clientzuul.routes..servic
2017-08-18 17:19:35
651
原创 springboot-cloud-4-feign
feignapplication.propertiesspring.application.name = feign-masterserver.port=8003eureka.client.serviceUrl.defaultZone=http://pear1:9998/eurekaapplication@SpringBootApplication@EnableD
2017-08-14 23:46:34
262
原创 springboot-cloud-2-ribbon
github地址：https://github.com/github-ygy/spring_cloud_test.gitribbon-consumer 依据springboot-cloud-2-eureka 快速启动ribbon消费 前提： eureka-server ： 注册中心分片1（也是提供者），注册自己的helloworld服务 eureka-
2017-08-09 21:16:10
757
原创 springboot-cloud-1-eureka
github地址：https://github.com/github-ygy/spring_cloud_testeureka-serverpomproject xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLo
2017-08-08 10:56:18
324
原创 mq-4-rmq安装
配置rocketmq配置hosts[root@iz2ze38kyanwmst1qj2lojz ~]# vim /etc/hosts//内容###host配置 rocketmq集群47.94.200.13 rocketmq-nameserver1 47.94.200.13 rocketmq-master1120.77.145.229 rocketmq-nameserver21
2017-08-07 11:04:54
433
原创 mq-3-amq连接
配置静态连接 //vim activemq.xml 添加 <!-- conf for statclly network --> <networkConnectors> <networkConnector name="local network" uri="sta
2017-07-30 22:21:23
961
原创 mq-2-多broker配置
桥接配置 1.cp conf目录(新broker启动配置目录) 2.修改activemq.xml a.brokerName 互相不能重复 b.数据存放的文件名称不能重复 c.所有涉及的transportConnector的端口，都需要不一样 3.修改jetty.xml中的端口（互不相同） 4、cp activemq目录
2017-07-28 15:13:51
535
原创 io-5-netty-工作原理
ServerBootStrap 服务启动辅助类，无参构造，采用builder模式（返回本对象构造参数）。group （初始化线程组）//加入线程组 public ServerBootstrap group(EventLoopGroup parentGroup, EventLoopGroup childGroup) { super.group(parentGr
2017-07-25 23:27:03
407
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