|By James Sun||
|October 27, 2012 03:00 PM EDT||
The electromagnetic spectrum buzzes with activity. Smartphones, wireless headsets, desktop computers, in-car navigation systems, GPS-enabled gadgets, and many more devices compete for bandwidth as well as our attention. I served as the lead software developer for a team that recently completed a demonstration of a real-time, pedestrian monitoring system at Sakura Matsuri, a major street festival in Washington, D.C. We chose PubNub as our real-time messaging backbone and this article will provide some insight into how we used PubNub and why it was the right platform for us.
Our project team, which included members from Traffax, Inc., Michael Belisle Design and Agile Media Ventures, was awarded a grant via the Reliability IDEA program, which is administered by the Transportation Research Board. The program (http://www.trb.org/IDEAProgram/IDEAReliability.aspx) funded proposals with potential to test innovative ways to improve the consistency or dependability of travel times, improve travel time prediction, and provide information to travelers and other highway system users when dealing with unexpected delays. A major goal of our project was to develop, implement and document a real-time pedestrian monitoring system at a large, outdoor event.
We approached the Japan-America Society of Washington, D.C., sponsors of the Sakura Matsuri Festival, the largest one-day display of Japanese culture in the United States. It's held each April as the climax of the National Cherry Blossom Festival. In years past, the festival has attracted well over 100,000 visitors in an area that covers several city blocks near the National Mall.
The technical architecture for our project consisted of five key elements:
- BluFax sensors
Sensors were deployed in strategic locations, primarily entrances/exits and performance stages, at Sakura Matsuri. The sensors listened for BluetoothTM devices that are set in "discover" mode and uploaded detected devices to the Data server.
- Data server
The Data server received packets of data transmitted by the BluFax sensors, did some limited processing, and forwarded them to the Messaging server.
- Messaging server
The Messaging server was the heart of the system. It's where all of the incoming data, both the raw, sensor-generated data and the data from external publishers described below, was transformed into more usable information. This information was then published via PubNub. In addition to serving as the primary publisher, the Messaging server saved the sensor data in MongoDB for post-event analysis.
- Data publishers
For our demonstration, we developed a mobile web application that served as just another publisher in our architecture. In addition, we developed standalone services (using node.js) that monitored social networking sites, such as Twitter and Flickr, and published related tweets and pictures to PubNub.
- Information consumers
We developed two interfaces that consumed and presented the data generated by the event. One was a web page that presented the data, most of which was geotagged, on a Google Map in real-time. The second was a visual dashboard that showed key performance indicators of sensor-related data.
As the lead developer, my role on the project was to create the software architecture to support the demonstration at Sakura Matsuri. The remainder of this article will focus on how PubNub was integrated in the last three components of that architecture.
PubNub served as the primary messaging backbone for our technical architecture. I developed a simple specification for how all messages should be formatted throughout our application. Once the team committed to the spec, we were able to integrate publishers and subscribers very easily, across a variety of locations, platforms and technologies.
Figure 1: Main Web Display
The mobile web application, developed with PhoneGap, included a function which simulated a parking garage that updated festival attendees on the number of spaces available for patrons. Instead of spending our limited resources building and maintaining a fast, robust and scalable messaging infrastructure, PubNub allowed us to focus our energy on integrating several varied sources of data and building creative ways to present the information.
I explored several messaging options before settling on PubNub. My goals were to build something quickly using node.js, host it in the cloud, and support our "bursty" traffic load without getting bogged down in managing multiple servers and services. The first option I looked at was building our application on top of Socket.IO, a terrific library developed by Guillermo Rauch, a superstar in the node.js community. While Socket.IO is a solid library, we didn't have the time or development resources to build up the necessary infrastructure to host, manage and tune a server running Socket.IO.
At the time I was considering various options, the primary (commercial) competitor to PubNub was Pusher. While there is a key technical difference between the two services - PubNub uses HTTP streaming/long polling while Pusher uses websockets - for our use case, the base feature set and pricing offered by both were pretty similar. Since I had already hacked together a quick-and-dirty prototype using the tutorials, documentation and libraries provided by PubNub, it made the most sense to stick with PubNub.
One key benefit of PubNub now is the availability of data centers worldwide through its Multi-Region Deployment add-on. As we look to deploy our solution across the U.S. and internationally, having a technology partner who has a global presence, will be a critical success factor.
In the end, I was very happy my choice of PubNub. Their feature set and customer support were key factors in my success.
Our demonstration at Sakura Matsuri went extremely well and was well received by the sponsor as well as curious attendees. If you're interested, you can watch a short video documenting our project here, http://vimeo.com/50101608. Now that the event is over, I've had an opportunity to sit back and take a hard look at what we accomplished and the role that PubNub played in our solution. Here are a couple of things to keep in mind if you're evaluating PubNub as a real-time messaging component for your solution:
For our demonstration at Sakura Matsuri, we did not take advantage of segregating messages via channels. One benefit of incorporating channels is that subscribers could decide which types of messages they were most interested in receiving. Traffic and parking messages would be useful to those driving to the event, but less helpful to folks taking public transportation.
PubNub is fast. While a comprehensive performance analysis is beyond the scope of this article, let's just say that there were plenty of other components that were part of the overall architecture that were much slower than PubNub.
- Customer Support
For paid customers, PubNub offers 24x7 phone support and a service level agreement (SLA). As it turned out, I did have to call PubNub support on the day of the event. Like any good developer, I decided to modify code at the last minute (!) and wound up breaking something that had worked previously. I spoke to a PubNub customer support engineer, and he addressed my issue quickly and completely.
With major technology companies and startups seriously embracing IoT strategies, now is the perfect time to attend @ThingsExpo 2016 in New York and Silicon Valley. Learn what is going on, contribute to the discussions, and ensure that your enterprise is as "IoT-Ready" as it can be! Internet of @ThingsExpo, taking place Nov 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 17th Cloud Expo and will feature technical sessions from a rock star conference faculty ...
Nov. 25, 2015 02:45 PM EST Reads: 487
Internet of @ThingsExpo, taking place June 7-9, 2016 at Javits Center, New York City and Nov 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with the 18th International @CloudExpo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world and ThingsExpo New York Call for Papers is now open.
Nov. 25, 2015 02:30 PM EST Reads: 495
Growth hacking is common for startups to make unheard-of progress in building their business. Career Hacks can help Geek Girls and those who support them (yes, that's you too, Dad!) to excel in this typically male-dominated world. Get ready to learn the facts: Is there a bias against women in the tech / developer communities? Why are women 50% of the workforce, but hold only 24% of the STEM or IT positions? Some beginnings of what to do about it! In her Day 2 Keynote at 17th Cloud Expo, San...
Nov. 25, 2015 02:00 PM EST Reads: 501
In his General Session at DevOps Summit, Asaf Yigal, Co-Founder & VP of Product at Logz.io, explored the value of Kibana 4 for log analysis and provided a hands-on tutorial on how to set up Kibana 4 and get the most out of Apache log files. He examined three use cases: IT operations, business intelligence, and security and compliance. Asaf Yigal is co-founder and VP of Product at log analytics software company Logz.io. In the past, he was co-founder of social-trading platform Currensee, which...
Nov. 25, 2015 12:45 PM EST Reads: 107
There are over 120 breakout sessions in all, with Keynotes, General Sessions, and Power Panels adding to three days of incredibly rich presentations and content. Join @ThingsExpo conference chair Roger Strukhoff (@IoT2040), June 7-9, 2016 in New York City, for three days of intense 'Internet of Things' discussion and focus, including Big Data's indespensable role in IoT, Smart Grids and Industrial Internet of Things, Wearables and Consumer IoT, as well as (new) IoT's use in Vertical Markets.
Nov. 25, 2015 12:00 PM EST Reads: 515
The Internet of Things (IoT) is growing rapidly by extending current technologies, products and networks. By 2020, Cisco estimates there will be 50 billion connected devices. Gartner has forecast revenues of over $300 billion, just to IoT suppliers. Now is the time to figure out how you’ll make money – not just create innovative products. With hundreds of new products and companies jumping into the IoT fray every month, there’s no shortage of innovation. Despite this, McKinsey/VisionMobile data...
Nov. 25, 2015 10:00 AM EST Reads: 425
One of the most important tenets of digital transformation is that it’s customer-driven. In fact, the only reason technology is involved at all is because today’s customers demand technology-based interactions with the companies they do business with. It’s no surprise, therefore, that we at Intellyx agree with Patrick Maes, CTO, ANZ Bank, when he said, “the fundamental element in digital transformation is extreme customer centricity.” So true – but note the insightful twist that Maes adde...
Nov. 25, 2015 09:00 AM EST Reads: 394
Just over a week ago I received a long and loud sustained applause for a presentation I delivered at this year’s Cloud Expo in Santa Clara. I was extremely pleased with the turnout and had some very good conversations with many of the attendees. Over the next few days I had many more meaningful conversations and was not only happy with the results but also learned a few new things. Here is everything I learned in those three days distilled into three short points.
Nov. 25, 2015 09:00 AM EST Reads: 264
Nov. 25, 2015 08:30 AM EST Reads: 142
As organizations realize the scope of the Internet of Things, gaining key insights from Big Data, through the use of advanced analytics, becomes crucial. However, IoT also creates the need for petabyte scale storage of data from millions of devices. A new type of Storage is required which seamlessly integrates robust data analytics with massive scale. These storage systems will act as “smart systems” provide in-place analytics that speed discovery and enable businesses to quickly derive meaningf...
Nov. 25, 2015 08:15 AM EST Reads: 346
DevOps is about increasing efficiency, but nothing is more inefficient than building the same application twice. However, this is a routine occurrence with enterprise applications that need both a rich desktop web interface and strong mobile support. With recent technological advances from Isomorphic Software and others, rich desktop and tuned mobile experiences can now be created with a single codebase – without compromising functionality, performance or usability. In his session at DevOps Su...
Nov. 25, 2015 07:45 AM EST Reads: 341
You may have heard about the pets vs. cattle discussion – a reference to the way application servers are deployed in the cloud native world. If an application server goes down it can simply be dropped from the mix and a new server added in its place. The practice so far has mostly been applied to application deployments. Management software on the other hand is treated in a very special manner. Dedicated resources are set aside to run the management software components and several alerting syst...
Nov. 25, 2015 07:30 AM EST Reads: 128
It's been a busy time for tech's ongoing infatuation with containers. Amazon just announced EC2 Container Registry to simply container management. The new Azure container service taps into Microsoft's partnership with Docker and Mesosphere. You know when there's a standard for containers on the table there's money on the table, too. Everyone is talking containers because they reduce a ton of development-related challenges and make it much easier to move across production and testing environm...
Nov. 25, 2015 04:00 AM EST Reads: 550
People want to get going with DevOps or Continuous Delivery, but need a place to start. Others are already on their way, but need some validation of their choices. A few months ago, I published the first volume of DevOps and Continuous Delivery reference architectures which has now been viewed over 50,000 times on SlideShare (it's free to download...no registration required). Three things helped people in the deck: (1) the reference architectures, (2) links to the sources for each architectur...
Nov. 25, 2015 02:30 AM EST Reads: 197
Continuous processes around the development and deployment of applications are both impacted by -- and a benefit to -- the Internet of Things trend. To help better understand the relationship between DevOps and a plethora of new end-devices and data please welcome Gary Gruver, consultant, author and a former IT executive who has led many large-scale IT transformation projects, and John Jeremiah, Technology Evangelist at Hewlett Packard Enterprise (HPE), on Twitter at @j_jeremiah. The discussion...
Nov. 25, 2015 02:30 AM EST Reads: 681
Hiring the wrong candidate can cost a company hundreds of thousands of dollars, and result in lost profit and productivity during the search for a replacement. In fact, the Harvard Business Review has found that as much as 80 percent of turnover is caused by bad hiring decisions. But when your organization has implemented DevOps, the job is about more than just technical chops. It’s also about core behaviors: how they work with others, how they make decisions, and how those decisions translate t...
Nov. 25, 2015 12:45 AM EST Reads: 138
In today's enterprise, digital transformation represents organizational change even more so than technology change, as customer preferences and behavior drive end-to-end transformation across lines of business as well as IT. To capitalize on the ubiquitous disruption driving this transformation, companies must be able to innovate at an increasingly rapid pace. Traditional approaches for driving innovation are now woefully inadequate for keeping up with the breadth of disruption and change facin...
Nov. 25, 2015 12:30 AM EST Reads: 417
The Internet of Things is clearly many things: data collection and analytics, wearables, Smart Grids and Smart Cities, the Industrial Internet, and more. Cool platforms like Arduino, Raspberry Pi, Intel's Galileo and Edison, and a diverse world of sensors are making the IoT a great toy box for developers in all these areas. In this Power Panel at @ThingsExpo, moderated by Conference Chair Roger Strukhoff, panelists discussed what things are the most important, which will have the most profound...
Nov. 25, 2015 12:30 AM EST Reads: 411
PubNub has announced the release of BLOCKS, a set of customizable microservices that give developers a simple way to add code and deploy features for realtime apps.PubNub BLOCKS executes business logic directly on the data streaming through PubNub’s network without splitting it off to an intermediary server controlled by the customer. This revolutionary approach streamlines app development, reduces endpoint-to-endpoint latency, and allows apps to better leverage the enormous scalability of PubNu...
Nov. 24, 2015 10:00 PM EST Reads: 261
I recently attended and was a speaker at the 4th International Internet of @ThingsExpo at the Santa Clara Convention Center. I also had the opportunity to attend this event last year and I wrote a blog from that show talking about how the “Enterprise Impact of IoT” was a key theme of last year’s show. I was curious to see if the same theme would still resonate 365 days later and what, if any, changes I would see in the content presented.
Nov. 24, 2015 08:00 PM EST Reads: 343