Welcome!

You will be redirected in 30 seconds or close now.

ColdFusion Authors: Yakov Fain, Maureen O'Gara, Nancy Y. Nee, Tad Anderson, Daniel Kaar

Related Topics: ColdFusion

ColdFusion: Article

Working with the Apache Derby Database and ColdFusion

A basic introduction

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.

Terminology
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" >
select books.title
from app.books books
inner join app.authors authors on books.authorid=authors.authorid
where authors.lastname =
<cfqueryparam cfsqltype="cf_sql_varchar" value="Miro" />
</cfquery>

<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.


More Stories By Chip Temm

Over the past decade, Chip Temm moved from North America to Europe and on to Africa where his company anthroLogik solutions provided analysis and development services organizations across seven timezones. He is currently back in Washington, DC where "remote development" means working from home and "wildlife" means raccoon.

Comments (0)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


@ThingsExpo Stories
Code Halos - aka "digital fingerprints" - are the key organizing principle to understand a) how dumb things become smart and b) how to monetize this dynamic. In his session at @ThingsExpo, Robert Brown, AVP, Center for the Future of Work at Cognizant Technology Solutions, outlined research, analysis and recommendations from his recently published book on this phenomena on the way leading edge organizations like GE and Disney are unlocking the Internet of Things opportunity and what steps your organization should be taking to position itself for the next platform of digital competition.
In their session at @ThingsExpo, Shyam Varan Nath, Principal Architect at GE, and Ibrahim Gokcen, who leads GE's advanced IoT analytics, focused on the Internet of Things / Industrial Internet and how to make it operational for business end-users. Learn about the challenges posed by machine and sensor data and how to marry it with enterprise data. They also discussed the tips and tricks to provide the Industrial Internet as an end-user consumable service using Big Data Analytics and Industrial Cloud.
SYS-CON Media announced that Splunk, a provider of the leading software platform for real-time Operational Intelligence, has launched an ad campaign on Big Data Journal. Splunk software and cloud services enable organizations to search, monitor, analyze and visualize machine-generated big data coming from websites, applications, servers, networks, sensors and mobile devices. The ads focus on delivering ROI - how improved uptime delivered $6M in annual ROI, improving customer operations by mining large volumes of unstructured data, and how data tracking delivers uptime when it matters most.
SYS-CON Events announced today that ActiveState, the leading independent Cloud Foundry and Docker-based PaaS provider, has been named “Silver Sponsor” of SYS-CON's DevOps Summit New York, which will take place June 9-11, 2015, at the Javits Center in New York City, NY. ActiveState believes that enterprises gain a competitive advantage when they are able to quickly create, deploy and efficiently manage software solutions that immediately create business value, but they face many challenges that prevent them from doing so. The Company is uniquely positioned to help address these challenges thro...
The Industrial Internet revolution is now underway, enabled by connected machines and billions of devices that communicate and collaborate. The massive amounts of Big Data requiring real-time analysis is flooding legacy IT systems and giving way to cloud environments that can handle the unpredictable workloads. Yet many barriers remain until we can fully realize the opportunities and benefits from the convergence of machines and devices with Big Data and the cloud, including interoperability, data security and privacy.
SYS-CON Media announced that Cisco, a worldwide leader in IT that helps companies seize the opportunities of tomorrow, has launched a new ad campaign in Cloud Computing Journal. The ad campaign, a webcast titled 'Is Your Data Center Ready for the Application Economy?', focuses on the latest data center networking technologies, including SDN or ACI, and how customers are using SDN and ACI in their organizations to achieve business agility. The Cisco webcast is available on-demand.
IoT is still a vague buzzword for many people. In his session at @ThingsExpo, Mike Kavis, Vice President & Principal Cloud Architect at Cloud Technology Partners, discussed the business value of IoT that goes far beyond the general public's perception that IoT is all about wearables and home consumer services. He also discussed how IoT is perceived by investors and how venture capitalist access this space. Other topics discussed were barriers to success, what is new, what is old, and what the future may hold. Mike Kavis is Vice President & Principal Cloud Architect at Cloud Technology Pa...
The Internet of Things (IoT) is rapidly in the process of breaking from its heretofore relatively obscure enterprise applications (such as plant floor control and supply chain management) and going mainstream into the consumer space. More and more creative folks are interconnecting everyday products such as household items, mobile devices, appliances and cars, and unleashing new and imaginative scenarios. We are seeing a lot of excitement around applications in home automation, personal fitness, and in-car entertainment and this excitement will bleed into other areas. On the commercial side, m...
Dale Kim is the Director of Industry Solutions at MapR. His background includes a variety of technical and management roles at information technology companies. While his experience includes work with relational databases, much of his career pertains to non-relational data in the areas of search, content management, and NoSQL, and includes senior roles in technical marketing, sales engineering, and support engineering. Dale holds an MBA from Santa Clara University, and a BA in Computer Science from the University of California, Berkeley.
The Internet of Things (IoT) promises to evolve the way the world does business; however, understanding how to apply it to your company can be a mystery. Most people struggle with understanding the potential business uses or tend to get caught up in the technology, resulting in solutions that fail to meet even minimum business goals. In his session at @ThingsExpo, Jesse Shiah, CEO / President / Co-Founder of AgilePoint Inc., showed what is needed to leverage the IoT to transform your business. He discussed opportunities and challenges ahead for the IoT from a market and technical point of vie...
Things are being built upon cloud foundations to transform organizations. This CEO Power Panel at 15th Cloud Expo, moderated by Roger Strukhoff, Cloud Expo and @ThingsExpo conference chair, addressed the big issues involving these technologies and, more important, the results they will achieve. Rodney Rogers, chairman and CEO of Virtustream; Brendan O'Brien, co-founder of Aria Systems, Bart Copeland, president and CEO of ActiveState Software; Jim Cowie, chief scientist at Dyn; Dave Wagstaff, VP and chief architect at BSQUARE Corporation; Seth Proctor, CTO of NuoDB, Inc.; and Andris Gailitis, C...
SYS-CON Events announced today that CodeFutures, a leading supplier of database performance tools, has been named a “Sponsor” of SYS-CON's 16th International Cloud Expo®, which will take place on June 9–11, 2015, at the Javits Center in New York, NY. CodeFutures is an independent software vendor focused on providing tools that deliver database performance tools that increase productivity during database development and increase database performance and scalability during production.
Today’s enterprise is being driven by disruptive competitive and human capital requirements to provide enterprise application access through not only desktops, but also mobile devices. To retrofit existing programs across all these devices using traditional programming methods is very costly and time consuming – often prohibitively so. In his session at @ThingsExpo, Jesse Shiah, CEO, President, and Co-Founder of AgilePoint Inc., discussed how you can create applications that run on all mobile devices as well as laptops and desktops using a visual drag-and-drop application – and eForms-buildi...
"People are a lot more knowledgeable about APIs now. There are two types of people who work with APIs - IT people who want to use APIs for something internal and the product managers who want to do something outside APIs for people to connect to them," explained Roberto Medrano, Executive Vice President at SOA Software, in this SYS-CON.tv interview at Cloud Expo, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
Performance is the intersection of power, agility, control, and choice. If you value performance, and more specifically consistent performance, you need to look beyond simple virtualized compute. Many factors need to be considered to create a truly performant environment. In his General Session at 15th Cloud Expo, Harold Hannon, Sr. Software Architect at SoftLayer, discussed how to take advantage of a multitude of compute options and platform features to make cloud the cornerstone of your online presence.
Almost everyone sees the potential of Internet of Things but how can businesses truly unlock that potential. The key will be in the ability to discover business insight in the midst of an ocean of Big Data generated from billions of embedded devices via Systems of Discover. Businesses will also need to ensure that they can sustain that insight by leveraging the cloud for global reach, scale and elasticity.
Advanced Persistent Threats (APTs) are increasing at an unprecedented rate. The threat landscape of today is drastically different than just a few years ago. Attacks are much more organized and sophisticated. They are harder to detect and even harder to anticipate. In the foreseeable future it's going to get a whole lot harder. Everything you know today will change. Keeping up with this changing landscape is already a daunting task. Your organization needs to use the latest tools, methods and expertise to guard against those threats. But will that be enough? In the foreseeable future attacks w...
As enterprises move to all-IP networks and cloud-based applications, communications service providers (CSPs) – facing increased competition from over-the-top providers delivering content via the Internet and independently of CSPs – must be able to offer seamless cloud-based communication and collaboration solutions that can scale for small, midsize, and large enterprises, as well as public sector organizations, in order to keep and grow market share. The latest version of Oracle Communications Unified Communications Suite gives CSPs the capability to do just that. In addition, its integration ...
“The age of the Internet of Things is upon us,” stated Thomas Svensson, senior vice-president and general manager EMEA, ThingWorx, “and working with forward-thinking companies, such as Elisa, enables us to deploy our leading technology so that customers can profit from complete, end-to-end solutions.” ThingWorx, a PTC® (Nasdaq: PTC) business and Internet of Things (IoT) platform provider, announced on Monday that Elisa, Finnish provider of mobile and fixed broadband subscriptions, will deploy ThingWorx® platform technology to enable a new Elisa IoT service in Finland and Estonia.
From telemedicine to smart cars, digital homes and industrial monitoring, the explosive growth of IoT has created exciting new business opportunities for real time calls and messaging. In his session at @ThingsExpo, Ivelin Ivanov, CEO and Co-Founder of Telestax, shared some of the new revenue sources that IoT created for Restcomm – the open source telephony platform from Telestax. Ivelin Ivanov is a technology entrepreneur who founded Mobicents, an Open Source VoIP Platform, to help create, deploy, and manage applications integrating voice, video and data. He is the co-founder of TeleStax, a...