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开源MQTT网关：EMQX vs Mosquitto - 创客硬件开发 - 清泛IT社区，为创新赋能！
...合部署在嵌入式设备或资源有限的服务器上。优点：易于安装使用支持 MQTT 5.0 协议轻量高效积极的社区支持
缺点：可扩展性有限（<100k）没有集群支持缺少企业功能有限的云原生支持
EMQX 简介EMQX 项目于 2012 年底在 Github 发...
App Inventor 2 与 Mixly（米思齐）MixIO 平台数据通信方案完整调研 - 创客...
...求读写数据。实现方式：1. 使用 AI2 内置 Web 组件（无需安装扩展）2. MixIO 提供 HTTP API 接口（端点通常为 http://服务器:9090/api/...）3. 设置 Web 组件的 Url 属性，使用 POST 或 GET 方法4. 通过 RequestText / ResponseContent 处理数据优点：- AI2 ...
Logging framework incompatibility
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SLF4J 1.5.11 and 1.6.0 versions are not compatible (see compatibility report) because the argument list of org.slf4j.spi.LocationAwareLogger.log method has been changed (added Object[] p5):
SLF4J 1.5.11:
LocationAwareLogger.log ( org.slf4j.Marker p1, String p2, int p3,
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Spring: Why do we autowire the interface and not the implemented class?
...pplication-config.xml (or equivalent spring configuration file).
Do I need @Qualifier or @Resource?
Once you have more than one implementation, then you need to qualify each of them and during auto-wiring, you would need to use the @Qualifier annotation to inject the right implementation, alon...
What are naming conventions for MongoDB?
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Keep'em short: Optimizing Storage of Small Objects, SERVER-863. Silly but true.
I guess pretty much the same rules that apply to relation databases should apply here. And after so many decades there is still no agreement wheth...
Include an SVG (hosted on GitHub) in MarkDown
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@CiroSantilli六四事件法轮功包卓轩 The blob uses an iframe which can't do XSS like an embedded SVG can.
– Petah
Jan 26 '16 at 9:04
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Why am I getting a NoClassDefFoundError in Java?
...just put it anywhere, and the compiler was happy. Turns out I should have been more diligent for runtime to be happy as well.
– CenterOrbit
Oct 21 '14 at 15:34
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Showing commits made directly to a branch, ignoring merges in Git
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Both parents have equal weight in many contexts in git. If you've always been consistent in merging other changes in then you may find that this gives you what you want.
git log --no-merges --first-parent
Otherwise you may be able to exclude commits from other named branches.
git log --no-merge...
How to construct a REST API that takes an array of id's for the resources
...a protocol and if you study the major REST APIs available today, you will see that there are multiple ways of implementing it. The approach that I am suggesting is probably one of the closest to the concept since it accomplishes all the constraints described here: en.wikipedia.org/wiki/…. You woul...
Map enum in JPA with fixed values?
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@jaime Agreed! Is it crazy to think that developers might want to persist an enum as the value of one of its fields/properties instead of its int value or name? Both of those are extremely "fragile" and refactoring-unfriendly. And u...