Jiefang's Blog

过去心不可得，现在心不可得， 未来心不可得

Java集合-19丨SynchronousQueue

SynchronousQueue 简介 Java注释 A {@linkplain BlockingQueue blocking queue} in which each insert operation must wait for a corresponding remove operation by another thread, and vice versa. A synchro...

Posted by jiefang on December 18, 2019

Java集合-18丨PriorityBlockingQueue

PriorityBlockingQueue 简介 Java注释： An unbounded {@linkplain BlockingQueue blocking queue} that uses the same ordering rules as class {@link PriorityQueue} and supplies blocking retrieval operatio...

Posted by jiefang on December 18, 2019

Java集合-17丨PriorityQueue

PriorityQueue 简介 Java注释 An unbounded priority {@linkplain Queue queue} based on a priority heap.The elements of the priority queue are ordered according to their {@linkplain Comparable natural ...

Posted by jiefang on December 16, 2019

Java集合-16丨LinkedBlockingQueue

LinkedBlockingQueue 简介 Java注释 An optionally-bounded {@linkplain BlockingQueue blocking queue} based on linked nodes. This queue orders elements FIFO (first-in-first-out). The head of the queue ...

Posted by jiefang on December 16, 2019

Java集合-15丨ArrayBlockingQueue

ArrayBlockingQueue 简介 Java注释 A bounded {@linkplain BlockingQueue blocking queue} backed by an array. This queue orders elements FIFO (first-in-first-out). The head of the queue is that elemen...

Posted by jiefang on December 16, 2019

Java集合-14丨ConcurrentSkipListSet

ConcurrentSkipListSet 简介 Java注释 A scalable concurrent {@link NavigableSet} implementation based on a {@link ConcurrentSkipListMap}. The elements of the set are kept sorted according to their {...

Posted by jiefang on December 16, 2019

Java集合-13丨CopyOnWriteArraySet

CopyOnWriteArraySet 简介 官方注释 A {@link java.util.Set} that uses an internal {@link CopyOnWriteArrayList} for all of its operations. Thus, it shares the same basic properties:<ul> <l...

Posted by jiefang on December 16, 2019

Java集合-12丨TreeSet

TreeSet 简介 Java注释 A {@link NavigableSet} implementation based on a {@link TreeMap}.The elements are ordered using their {@linkplain Comparable natural ordering}, or by a {@link Comparator} prov...

Posted by jiefang on December 16, 2019

Java集合-11丨LinkedHashSet

LinkedHashSet 简介 官方注释 Hash table and linked list implementation of the Set interface,with predictable iteration order. This implementation differs from HashSet in that it maintains a doubly-li...

Posted by jiefang on December 15, 2019

Java集合-10丨HashSet

HashSet 简介 This class implements the Set interface, backed by a hash table (actually a HashMap instance). It makes no guarantees as to the iteration order of the set; in particular, it does not...

Posted by jiefang on December 14, 2019

Java集合-09丨ConcurrentSkipListMap

ConcurrentSkipListMap 简介 跳表是一个随机化的数据结构，实质就是一种可以进行二分查找的有序链表。 跳表在原有的有序链表上面增加了多级索引，通过索引来实现快速查找。 跳表不仅能提高搜索性能，同时也可以提高插入和删除操作的性能。 存储结构 类图 ConcurrentSkipListMap是线程安全的有序的哈希表，适用于高并发的场景。 源码 ...

Posted by jiefang on December 13, 2019

JVM-14丨SafePoint（安全点）

SafePoint 简介 A point in program where the state of execution is known by the VM，即代码中VM能够准确知道执行状态的位置。 safepoint可以用在不同地方，比如GC、Deoptimization，在HotspotVM中，GC safepoint比较常见，需要一个数据结构记录每个线程的调用栈、寄存器...

Posted by jiefang on December 13, 2019

Dubbo-01丨Apache Dubbo介绍

Apache Dubbo介绍 Apache Dubbo 是一款高性能、轻量级的开源Java RPC框架，它提供了三大核心能力：面向接口的远程方法调用，智能容错和负载均衡，以及服务自动注册和发现。 简介 Apache Dubbo ˈdʌbəʊ is a high-performance, java based R...

Posted by jiefang on December 13, 2019

Java集合-08丨ConcurrentHashMap

ConcurrentHashMap 问题 ConcurrentHashMap的数据结构？ ConcurrentHashMap是怎么解决并发安全问题？ ConcurrentHashMap使用了哪些锁？ ConcurrentHashMap的扩容？ ConcurrentHashMap是否是强一致性的？ 简介 ConcurrentHashMap是HashMap的线程安...

Posted by jiefang on December 11, 2019

Eureka-07丨Eureka Server 启动流程

Eureka Server 启动流程 1、启动EurekaServer 1 2 3 4 5 6 7 @EnableEurekaServer @SpringBootApplication public class EurekaServerApplication { public static void main(String[] args) { SpringApplic...

Posted by jiefang on December 10, 2019

Eureka-06丨服务实例配置信息

服务实例配置信息 参数名称 说明 默认值 eureka.instance.appname 注册到注册中心的应用名称 unknown eureka.instance.a-s-g-name 注册到注册中心的应用所属分组名称（AWS...

Posted by jiefang on December 9, 2019

Eureka-05丨Eureka Server 配置参数

Eureka Server 配置参数（eureka.server.*） org.springframework.cloud.netflix.eureka.server.EurekaServerConfigBean Eureka Server配置 参数名称 说明 默认值 eureka.serv...

Posted by jiefang on December 9, 2019

Eureka-04丨Eureka Client 配置参数

Eureka Client 配置参数（eureka.client.*） org.springframework.cloud.netflix.eureka.EurekaClientConfigBean 参数名称 说明 默认值 eureka.client.enabled 用于指示Eu...

Posted by jiefang on December 9, 2019

Eureka-03丨Eureka和Zookeeper对比

Eureka和Zookeeper对比 CAP原则 CAP原则又称CAP定理，指的是在分布式系统的设计中，没有一种设计可以同时满足 Consistency（一致性）、 Availability（可用性）、Partition tolerance（分区容错性）3个特性，这三者不可得兼。 Consistency:一致性，在分布式系统中的所有数据备份，在同一时刻是否同样的值。 Av...

Posted by jiefang on December 9, 2019

Eureka-02丨Eureka架构

Eureka架构 数据存储结构 Eureka的数据结构分为：数据存储层(比作MySQL)和二级缓存层(比作Redis)。 数据存储层 registry 本质上是一个双层的ConcurrentHashMap，存储在内存中的。 第一层Map的key是spring.application.name，value 是第二层 ConcurrentHashMap； 第二层 Concurr...

Posted by jiefang on December 6, 2019

FEATURED TAGS
MySQL Java多线程 JUC SpringCloud RocketMQ Java集合 Redis JVM 转载 项目管理 Eureka 分布式锁 事务 网络编程 Hystrix Redisson 分布式原理 Feign Netty 锁 Dubbo Java基础 LeetCode Ribbon Zookeeper 架构设计 面试题 MQ Spring Zuul
ABOUT ME

过去心不可得，现在心不可得， 未来心不可得

FRIENDS