discovery

Spring Cloud Alibaba Nacos

由 核能气质少年 提交于 2020-01-13 10:40:46
1. Spring Cloud Alibaba 介绍 Spring Cloud Alibaba 为分布式应用程序开发提供了一站式解决方案。它包含了开发分布式应用程序所需的所有组件，使得你可以轻松地使用Spring Cloud开发应用程序。 使用Spring Cloud Alibaba，只需要添加一些注释和少量配置即可将Spring Cloud应用程序连接到Alibaba的分布式解决方案，并使用Alibaba中间件构建分布式应用程序系统。 特性： 流量控制和服务降级 ：Sentinel进行流量控制，断路和系统自适应保护。 服务注册和发现 ：实例可以在Nachos中注册，并且客户端可以使用Spring管理的Bean发现实例。支持Ribbon。 分布式配置 ：使用Nacos作为数据存储。 事件驱动 ：建立与Spring Cloud Stream RocketMQ Binder连接的高度可扩展的事件驱动型微服务。 消息总线 ：利用Spring Cloud Bus RocketMQ链接分布式系统的节点。 分布式事务 ：支持高性能、易于使用的分布式事务。 Dubbo RPC ：通过Dubbo RPC扩展Spring Cloud服务之间调用的通信协议。 阿里云对象存储 ：阿里云对象存储服务（OSS）是一种加密、安全、经济高效且易于使用的对象存储服务，可让您在云中存储，备份和存档大量数据。

How to find all available services using Android's native Network Service Discovery

由 倾然丶 夕夏残阳落幕 提交于 2020-01-01 10:14:55
问题 I've read through android documentation on finding specific network services using NSD. Below is my code to discover all the available _http._tcp services. final NsdManager.DiscoveryListener discoveryListener = new NsdManager.DiscoveryListener() { @Override public void onDiscoveryStarted(String s) { Log.i(TAG, "onDiscoveryStarted: " + s); } @Override public void onServiceFound(NsdServiceInfo nsdServiceInfo) { Log.i(TAG, "onServiceFound: " + nsdServiceInfo.toString()); } @Override public void

.Net Discovery系列之十-深入理解平台机制与性能影响(上)

由 不羁的心 提交于 2019-12-29 02:29:42
转眼间《.Net Discovery》系列文章已经推出1年了，本文为该系列的第10-13篇文章，在本文中将对以前所讲的.Net平台知识做一个小小的总结与机制分析，引出并重点介绍这些机制对程序性能的影响与改进建议。 本文将分为四部分，分别讲述了：垃圾回收机制、即时编译机制、异常处理机制、字符串驻驻留机制的原理与性能改进建议。《.Net Discovery》系列的每篇文章撰写耗时都在2天以上，转载时麻烦著名作者Aicken(李鸣)，并且未经作者同意，禁止一切商业用途！ 一.关于垃圾回收机制 ● 机制分析 垃圾收集器是.Net平台的一个特性，它自动回收托管堆上不再使用的对象，及时清理内存,这一切都是对开发人员透明的，当然你也可以手动把它召唤出来，它的本质就是跟踪所有被引用到的对象，整理对象不再被引用的对象，回收相应的内存。垃圾收集机制采用“标记与清除(Mark Sweep)”算法来完成上述任务，整个过程分为两步： Step 1.Mark-Sweep ：从应用程序的root出发，利用相互引用关系，遍历其在Heap上动态分配的所有对象，指明需要回收的对象，标记出那些存活的对象，予以标记。 Step 2.Compact： 对内存中存活的对象进行移动，修改它们的指针，使之在内存中连续，这样空闲的内存也就连续了，即完成了内存释放工作，也解决了内存碎片问题，这个过程也可以成为指针的压缩。

Discover the character encoding from byte

由 喜夏-厌秋 提交于 2019-12-24 10:27:58
问题 I have a string where I know that the degree symbol (°) is represented by the byte 63 (3F). Each character is represented by a single byte. How can I find the character encoding used ? 回答1: Almost all 8-bit encodings in modern times coincide with ASCII in the ASCII range, so byte 3F hexadecimal is the question mark “?”. As Sebtm’s comment suggests, this might result from character-level data error. E.g., some software that is limited to ASCII could turn all other bytes to “?” – not a good

Network infrastructure discovery

由 半城伤御伤魂 提交于 2019-12-20 10:36:41
问题 I would like to perform a thorough LAN devices discovery, so that I can create a diagram similar to the one attached, but with additional information like IP and MAC addresses. I've tried the code from Torry: type PNetResourceArray = ^TNetResourceArray; TNetResourceArray = array[0..100] of TNetResource; function CreateNetResourceList(ResourceType: DWord; NetResource: PNetResource; out Entries: DWord; out List: PNetResourceArray): Boolean; var EnumHandle: THandle; BufSize: DWord; Res: DWord;

Bluetooth -> service discovery failed

由 ∥☆過路亽．° 提交于 2019-12-20 09:04:04
问题 I'm writing an application that is able to communicate with my PC. I have used the Bluetooth functionalities of the SDK 2.1. I can find devices, get their MAC address, create an RFCOMM socket, but when I start the connection, I get the following error message. Service discovery failed. Is it because of the UUID, which is not the same on my application and on my PC? How can I get the correct UUID on my PC? If I write a such application, is my Nexus One the client or the server? 回答1: OK, I got

How do you find interesting problems to solve? [closed]

由 徘徊边缘 提交于 2019-12-20 08:07:42
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 7 years ago . How do you find interesting problems to solve? I often want to learn new programming languages. However, I feel that to really understand it, I must write something which is: Real—it should solve some real-world problem. That problem doesn't have to be new (in fact, having a reference solution might be a good

Device discovery in local network

由 三世轮回 提交于 2019-12-19 17:37:50
问题 I'm currently developing an android app using SDK >= 16 which should be able to discover different android devices (later also iOS devices) in a local area network using the WiFi radio. My first guess was to use multicast which turned out to be non functional on my Samsung Galaxy S2: packets are only received when sent from the same device. My second guess is to actively scan the network using a limited IP address range and wait for a proper response. Unfortunately, this implies that the

SNMPv3 Discovery

由 喜你入骨 提交于 2019-12-19 12:06:08
问题 I have use SNMP v1 and 2c for network discovery of printers by sending broadcast message with community "public" and it works just fine, but when I send broadcast message with version 3 of the protocol I got timeout error. Do somebody share example of SNMPv3 device discovery? Thank you. 回答1: Two things: 1) Doing a broadcast SNMPv1/v2c is actually not defined to work in the protocol. Cheap implementations will simply respond, as you've found, to any packet it sees that the kernel accepts to

SNMPv3 Discovery

由 前提是你 提交于 2019-12-19 12:06:06
问题 I have use SNMP v1 and 2c for network discovery of printers by sending broadcast message with community "public" and it works just fine, but when I send broadcast message with version 3 of the protocol I got timeout error. Do somebody share example of SNMPv3 device discovery? Thank you. 回答1: Two things: 1) Doing a broadcast SNMPv1/v2c is actually not defined to work in the protocol. Cheap implementations will simply respond, as you've found, to any packet it sees that the kernel accepts to
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