|By Chip Temm||
|October 13, 2007 08:15 PM EDT||
Early releases of Cold Fusion (under Allaire) focused on the Windows market and it was common to include example Access databases. It was common for entry-level developers to take this example to heart and build systems on Access back-ends. One didn't have to install, set up, admin, or most importantly pay for anything. With the beta release of ColdFusion 8, Adobe is providing support for an array of open source databases. Now using PostgreSQL, MySQL, or Apache Derby (formerly IBM Cloudscape) has been made that simpler for CF developers since JDBC drivers for all of them are included. Any of these solutions can be used for the free distribution of databases on either Windows or *nix. The same can't be said of Access. Adobe has made moving to open source more convenient by including Derby in the base install of Scorpio. It will now likely become common for systems to be distributed with Derby databases because of their operating system independence, royalty-free distribution, small footprint, and ease of installation. This article attempts to help early adopters try Derby out with ColdFusion 8.
Apache Derby is a pure Java database that supports almost all of the SQL-92 standard. It fits in about 2MB of memory, a nice efficient footprint for memory-constrained environments like mobile applications (or your desktop masquerading as a server). With ColdFusion it runs on J2SE 1.6 and the shipping driver is a native protocol, a pure Java (level 4) driver. There are two flavors of Derby: embedded and network. Simply put, embedded is a direct-connect (you have to run it in the same JVM as the code connecting to it), single-client database while network adds networking and multi-client support.
The Embedded Database
Once you install Scorpio and find your way to the Data Sources section of the Administrator, you'll see four Derby Embedded example databases (and zero Access databases). The example databases are installed in /ColdFusion8/db. (Note: File references in this article assume that ColdFusion is installed at the root of your filesystem. If you're on Windows, the default install path is C:\ColdFusion8 and the references below should be changed accordingly.)
One of these examples is the CFBookClub database. One can query this database in the same way as any other in ColdFusion, using the CFQuery, CFQueryParam, CFStoredProc, and CFProcParam tags. Create a new page called testDatabase.cfm in your webroot and code:
<cfquery name="test" datasource="cfbookclub" >
from app.books books
inner join app.authors authors on books.authorid=authors.authorid
where authors.lastname =
<cfqueryparam cfsqltype="cf_sql_varchar" value="Miro" />
<cfdump var="#test#" />
Run it and you should see CF8's new query dump format which gives you metadata about the query including execution time.
Creating Embedded Databases
To create a new embedded database, enter the directory where you want the database files kept. Do not create a new directory yourself and then browse to it. Select or enter the directory you'd like to contain the database subdirectory. Now write the subdirectory name you'd like after this. For example, Browse to "C:\ColdFusion8\db\" then enter "mytestdatabase" in the entry box. The Database Folder field now reads "C:\ColdFusion8\db\mytestdatabase". (Figure 1)
If you're creating a new Derby database, open the Advanced tab and enter 'create=true' in the Connection String field. If the directory specified already exists and doesn't contain a Derby database, datasource creation will fail writing an error 'XBM0J' to the Derby log file (in /ColdFusion8/logs). (Figure 2)
It's not great interface design to have the file browser come up to help you locate the target directory when the activity fails if the directory already exists and doesn't contain a Derby database. The only time this will work is when you point to a directory that does contain a Derby database. If you want to create a datasource for a Derby database someone has given you, you can point the file browser at the directory that contains it. You must still open the Advanced tab and enter 'create=true' in the Connection String field. (Figure 3)
The ColdFusion server doesn't seem to like to let go of Derby embedded databases once you connect to them. Restarting the CF service is very slow after creating and verifying the new embedded Derby database. This is a bit problematical since it currently appears that the Advanced Options "Maintain connections across client requests," "Timeout," and "Interval" don't work: connections are maintained indefinitely. Restarting the server is the only way to release a connection. You can't have multiple connections open to an embedded database, so you can't use other tools (such as Eclipse or ij, discussed below) to work with it while running your CF application. This is one of many good reasons to think about using Derby Network instead.
Creating Network Databases
Creating a Derby network database is just as easy. First start up the Derby server: "java -jar /ColdFusion8/lib/derbynet.jar -start." Now go to CF Administrator and create a new Derby client datasource. There's currently a bug in this dialog, so in the Advanced/Connection String box, you'll have to start with a semicolon ";create=true" to get it to work. Hit submit and your new database directory will be created in the same directory in which the server started up (/ColdFusion8/lib). There's nothing to say that you have to run the Derby server on the same box as CF, in fact if you want your app to scale across multiple servers it's better not to.
Installing a Derby Network Server
While CF8 ships with the latest Derby (10.2.2), Adobe's not going to notify you when new features or minor patches come out. You'll have to go to Apache to keep up-to-date. (http://db.apache.org/derby/derby_downloads.html.) Download the latest version and unpack it on the server of your choice. Set the JAVA_HOME environment variable to the location of your Java runtime. If you want to use the runtime shipping with the CF server (JavaSE 1.6) to try this out, run 'set JAVA_HOME = [coldfusion install dir]\runtime' (Windows) or 'export JAVA_HOME="[coldfusion install dir]/runtime"' (*nix). (If you're smart and installing this on another machine, you should have downloaded the latest JRE from Sun and installed it there already.) Navigate to the Derby bin subdirectory and run the setNetworkServerCP script, which adds Derby's info to your CLASSPATH environment variable then run the startNetworkServer script. Scripts are included for *nix and Windows. Your Derby server will now tell you that it's listening on port 1527 and is ready to accept connections. When you use the ColdFusion Datasources dialog to tell the Derby server to make new databases (with the create=true directive), Derby will create new subdirectories in its startup directory (/Derby/bin directory) by default. When you want to stop your new server - you guessed it, run stopNetworkServer.
"LinearHub provides smart video conferencing, which is the Roundee service, and we archive all the video conferences and we also provide the transcript," stated Sunghyuk Kim, CEO of LinearHub, in this SYS-CON.tv interview at @ThingsExpo, held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA.
Jan. 20, 2017 03:00 PM EST Reads: 1,633
Things are changing so quickly in IoT that it would take a wizard to predict which ecosystem will gain the most traction. In order for IoT to reach its potential, smart devices must be able to work together. Today, there are a slew of interoperability standards being promoted by big names to make this happen: HomeKit, Brillo and Alljoyn. In his session at @ThingsExpo, Adam Justice, vice president and general manager of Grid Connect, will review what happens when smart devices don’t work togethe...
Jan. 20, 2017 02:15 PM EST Reads: 575
"There's a growing demand from users for things to be faster. When you think about all the transactions or interactions users will have with your product and everything that is between those transactions and interactions - what drives us at Catchpoint Systems is the idea to measure that and to analyze it," explained Leo Vasiliou, Director of Web Performance Engineering at Catchpoint Systems, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York Ci...
Jan. 20, 2017 01:30 PM EST Reads: 5,726
The 20th International Cloud Expo has announced that its Call for Papers is open. Cloud Expo, to be held June 6-8, 2017, at the Javits Center in New York City, brings together Cloud Computing, Big Data, Internet of Things, DevOps, Containers, Microservices and WebRTC to one location. With cloud computing driving a higher percentage of enterprise IT budgets every year, it becomes increasingly important to plant your flag in this fast-expanding business opportunity. Submit your speaking proposal ...
Jan. 20, 2017 01:30 PM EST Reads: 5,232
Discover top technologies and tools all under one roof at April 24–28, 2017, at the Westin San Diego in San Diego, CA. Explore the Mobile Dev + Test and IoT Dev + Test Expo and enjoy all of these unique opportunities: The latest solutions, technologies, and tools in mobile or IoT software development and testing. Meet one-on-one with representatives from some of today's most innovative organizations
Jan. 20, 2017 12:30 PM EST Reads: 1,647
20th Cloud Expo, taking place June 6-8, 2017, at the Javits Center in New York City, NY, will feature technical sessions from a rock star conference faculty and the leading industry players in the world. Cloud computing is now being embraced by a majority of enterprises of all sizes. Yesterday's debate about public vs. private has transformed into the reality of hybrid cloud: a recent survey shows that 74% of enterprises have a hybrid cloud strategy.
Jan. 20, 2017 12:30 PM EST Reads: 4,344
WebRTC is the future of browser-to-browser communications, and continues to make inroads into the traditional, difficult, plug-in web communications world. The 6th WebRTC Summit continues our tradition of delivering the latest and greatest presentations within the world of WebRTC. Topics include voice calling, video chat, P2P file sharing, and use cases that have already leveraged the power and convenience of WebRTC.
Jan. 20, 2017 12:30 PM EST Reads: 3,183
SYS-CON Events announced today that Super Micro Computer, Inc., a global leader in Embedded and IoT solutions, will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 7-9, 2017, at the Javits Center in New York City, NY. Supermicro (NASDAQ: SMCI), the leading innovator in high-performance, high-efficiency server technology, is a premier provider of advanced server Building Block Solutions® for Data Center, Cloud Computing, Enterprise IT, Hadoop/Big Data, HPC and E...
Jan. 20, 2017 12:15 PM EST Reads: 5,833
Internet of @ThingsExpo, taking place June 6-8, 2017 at the Javits Center in New York City, New York, is co-located with the 20th International Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. @ThingsExpo New York Call for Papers is now open.
Jan. 20, 2017 10:45 AM EST Reads: 3,701
WebRTC sits at the intersection between VoIP and the Web. As such, it poses some interesting challenges for those developing services on top of it, but also for those who need to test and monitor these services. In his session at WebRTC Summit, Tsahi Levent-Levi, co-founder of testRTC, reviewed the various challenges posed by WebRTC when it comes to testing and monitoring and on ways to overcome them.
Jan. 20, 2017 10:45 AM EST Reads: 6,085
DevOps is being widely accepted (if not fully adopted) as essential in enterprise IT. But as Enterprise DevOps gains maturity, expands scope, and increases velocity, the need for data-driven decisions across teams becomes more acute. DevOps teams in any modern business must wrangle the ‘digital exhaust’ from the delivery toolchain, "pervasive" and "cognitive" computing, APIs and services, mobile devices and applications, the Internet of Things, and now even blockchain. In this power panel at @...
Jan. 20, 2017 09:45 AM EST Reads: 2,930
WebRTC services have already permeated corporate communications in the form of videoconferencing solutions. However, WebRTC has the potential of going beyond and catalyzing a new class of services providing more than calls with capabilities such as mass-scale real-time media broadcasting, enriched and augmented video, person-to-machine and machine-to-machine communications. In his session at @ThingsExpo, Luis Lopez, CEO of Kurento, introduced the technologies required for implementing these idea...
Jan. 20, 2017 08:30 AM EST Reads: 4,757
Buzzword alert: Microservices and IoT at a DevOps conference? What could possibly go wrong? In this Power Panel at DevOps Summit, moderated by Jason Bloomberg, the leading expert on architecting agility for the enterprise and president of Intellyx, panelists peeled away the buzz and discuss the important architectural principles behind implementing IoT solutions for the enterprise. As remote IoT devices and sensors become increasingly intelligent, they become part of our distributed cloud enviro...
Jan. 20, 2017 08:15 AM EST Reads: 4,949
"A lot of times people will come to us and have a very diverse set of requirements or very customized need and we'll help them to implement it in a fashion that you can't just buy off of the shelf," explained Nick Rose, CTO of Enzu, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
Jan. 20, 2017 08:15 AM EST Reads: 4,720
The WebRTC Summit New York, to be held June 6-8, 2017, at the Javits Center in New York City, NY, announces that its Call for Papers is now open. Topics include all aspects of improving IT delivery by eliminating waste through automated business models leveraging cloud technologies. WebRTC Summit is co-located with 20th International Cloud Expo and @ThingsExpo. WebRTC is the future of browser-to-browser communications, and continues to make inroads into the traditional, difficult, plug-in web co...
Jan. 20, 2017 07:15 AM EST Reads: 2,981
In his keynote at @ThingsExpo, Chris Matthieu, Director of IoT Engineering at Citrix and co-founder and CTO of Octoblu, focused on building an IoT platform and company. He provided a behind-the-scenes look at Octoblu’s platform, business, and pivots along the way (including the Citrix acquisition of Octoblu).
Jan. 20, 2017 07:00 AM EST Reads: 9,083
For basic one-to-one voice or video calling solutions, WebRTC has proven to be a very powerful technology. Although WebRTC’s core functionality is to provide secure, real-time p2p media streaming, leveraging native platform features and server-side components brings up new communication capabilities for web and native mobile applications, allowing for advanced multi-user use cases such as video broadcasting, conferencing, and media recording.
Jan. 20, 2017 07:00 AM EST Reads: 6,873
Web Real-Time Communication APIs have quickly revolutionized what browsers are capable of. In addition to video and audio streams, we can now bi-directionally send arbitrary data over WebRTC's PeerConnection Data Channels. With the advent of Progressive Web Apps and new hardware APIs such as WebBluetooh and WebUSB, we can finally enable users to stitch together the Internet of Things directly from their browsers while communicating privately and securely in a decentralized way.
Jan. 20, 2017 03:00 AM EST Reads: 918
WebRTC is about the data channel as much as about video and audio conferencing. However, basically all commercial WebRTC applications have been built with a focus on audio and video. The handling of “data” has been limited to text chat and file download – all other data sharing seems to end with screensharing. What is holding back a more intensive use of peer-to-peer data? In her session at @ThingsExpo, Dr Silvia Pfeiffer, WebRTC Applications Team Lead at National ICT Australia, looked at differ...
Jan. 20, 2017 02:30 AM EST Reads: 5,037
The security needs of IoT environments require a strong, proven approach to maintain security, trust and privacy in their ecosystem. Assurance and protection of device identity, secure data encryption and authentication are the key security challenges organizations are trying to address when integrating IoT devices. This holds true for IoT applications in a wide range of industries, for example, healthcare, consumer devices, and manufacturing. In his session at @ThingsExpo, Lancen LaChance, vic...
Jan. 20, 2017 02:00 AM EST Reads: 6,590