topology | 易学教程

Storm WordCount error: Pipe to subprocess seems to be broken, no output read

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问题 Storm 0.10.0 my previous question (Apache storm : Could not load main class org.apache.storm.starter.ExclamationTopology) which was solved. hello I have a single node cluster up and running on my machine, the storm config file is as follows:(storm.yaml) storm.zookeeper.servers: # - "server1" # - "server2" - "localhost" storm.zookeeper.port: 2181 nimbus.host: "localhost" storm.local.dir: "/var/stormtmp" java.library.path: "/usr/local" supervisor.slots.ports: - 6700 - 6701 - 6702 - 6703 worker

storm spout didn't emit & result file empty

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问题 i'm new to storm i submitted different topologies form github like storm-starter and others successfully after some problem i faced it but some of the some spout didn't emit ! like that is that right ? or is there a problem ? where can i find the result after submitting topology ? i guessed in the result file in storm folder but it's empty ! this what i have in the bolt "one of them " 回答1: There is no explicit "result" file in storm. Your topology is responsible for handling/storing results

Communication Between Several Storm Topologies

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问题 I am trying to deploy several Storm topologies in production. I checked the documentation but couldn't find any references on whether it is possible for the topologies to communicate via native methods. Does anyone have any suggestions on how this could be implemented? In short, I am interested to see if the it's possible for tuples to be sent across topologies. Thanks for your help! 回答1: Theoretically, you could probably make it happen. Practically, no. If you want to communicate via tuples,

How to convert a polygon to a set on non-overlapping triangles?

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问题 I have a coordinate set of 2D points that form a closed polygon. I need to generate a set of 2D triangles that distribute the polygon completely. There are no constrains as such except that the triangles should fill the area of polygon completely. It would be even more helpful if it is a standard algorithm I could implement. 回答1: As mentioned above, Delaunay triangulation is a rather complicated algorithm for this task. If you accept O(n^2) running time, you may try Ear Clipping algorithm

“Center of Mass” between a set of points on a Toroidally-Wrapped Map that minimizes average distance to all points

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问题 edit As someone has pointed out, what I'm looking for is actually the point minimizing total geodesic distance between all other points My map is topographically similar to the ones in Pac Man and Asteroids. Going past the top will warp you to the bottom, and going past the left will warp you to the right. Say I have two points (of the same mass) on the map and I wanted to find their center of mass. I could use the classical definition, which basically is the midpoint . However, let's say the

How to convert a polygon to a set on non-overlapping triangles?

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I have a coordinate set of 2D points that form a closed polygon. I need to generate a set of 2D triangles that distribute the polygon completely. There are no constrains as such except that the triangles should fill the area of polygon completely. It would be even more helpful if it is a standard algorithm I could implement. As mentioned above, Delaunay triangulation is a rather complicated algorithm for this task. If you accept O(n^2) running time, you may try Ear Clipping algorithm which is much more easier to understand and to code. The basic idea is the following. Every polygon with >= 4

D3 - How to get correct scale and translate origin after manual zoom and pan to country path

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问题 I've got a topology map with pan and zoom functionality. Clicking on the country, I'm zoom/panning into the country, using this: if (this.active === d) return var g = this.vis.select('g') g.selectAll(".active").classed("active", false) d3.select(path).classed('active', active = d) var b = this.path.bounds(d); g.transition().duration(750).attr("transform","translate(" + this.proj.translate() + ")" + "scale(" + .95 / Math.max((b[1][0] - b[0][0]) / this.options.width, (b[1][1] - b[0][1]) / this

商业化服务端的SSP广告引擎

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商业化服务端的SSP广告引擎当今互联网有几种主流的商业模式：广告、游戏、增值服务等。毫无疑问“广告推送”带给互联网公司的收入绝对是相当可观。今天小主就为大家分享一篇来自360手机卫士团队分享的SSP广告引擎，这么高质量的内部干货不拿出来分享实在对不起大家。 PS：丰富的一线技术、多元化的表现形式，尽在“HULK一线技术杂谈”，点关注哦！一、概述当今互联网有几种主流的商业模式：广告、游戏、增值服务等。今天我想谈一谈广告系统中的SSP引擎。SSP（全称：Sell-Side Platform）是一个媒体服务平台，该平台通过人群定向技术，智能的管理媒体广告位库存、优化广告的投放，助网络媒体实现其广告资源优化，提高其广告资源价值，达到帮助媒体提高收益的目的（以上摘自360百科）。大白话就是：各种端（app端）找SSP要广告， SSP选出一批广告，并告诉这些端，按照某些样式展示。SSP负责如何去选广告，以及相应的样式是什么样子。SSP不断优化选择广告和确定样式的策略，让各个产品能赚到更多的钱。一个好的SSP系统应该具备那些能力？我总结了五点，列在下面：灵活扩展能力快速接入各种广告源快速接入各个产品快速验证广告的不同样式快速调整广告页面布局快速调整广告策略 2. 高性能、高并发能力 3. 高效发布和在线灰度能力 4. 快速调试定位错误能力 5.

“Center of Mass” between a set of points on a Toroidally-Wrapped Map that minimizes average distance to all points

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edit As someone has pointed out, what I'm looking for is actually the point minimizing total geodesic distance between all other points My map is topographically similar to the ones in Pac Man and Asteroids. Going past the top will warp you to the bottom, and going past the left will warp you to the right. Say I have two points (of the same mass) on the map and I wanted to find their center of mass. I could use the classical definition, which basically is the midpoint . However, let's say the two points are on opposite ends of the mass. There is another center of mass, so to speak, formed by

Are javascript chart library customizable or compatible with JavaFX

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I was wondering if typical javascript topology chart libraries can be easily customized to perform some action when I hover or click on the node object? The libraries I'm currently considering are D3.js, chartjs, and sigma.js and the actions could include calling a Java method through JavaFX. Any suggestions would be appreciated. Thanks! JavaScript visualization libraries may be integrated with JavaFX via WebView and it's associated Java<->JavaScript bridge technology . A sample of such integration is this JavaFX application which embed a jQuery DatePicker . OK, so a datepicker is not a chart