Welcome!

Open Source Cloud Authors: Elizabeth White, Liz McMillan, Pat Romanski, Greg Schulz, Carmen Gonzalez

Related Topics: Open Source Cloud, Linux Containers, Eclipse

Open Source Cloud: Article

Developing an Application Using the Eclipse BIRT Report Engine API

Provide report generation and rendering services

The Eclipse platform is an open source, integrated system of application development tools that you implement and extend using a plug-in interface. The Eclipse Business Intelligence Reporting Tool (BIRT) is a set of plug-in extensions that enable a developer to add reporting functionality to an application. BIRT provides a Report Engine API that a developer can use to create a customized report generator application. The org.eclipse.birt.report.engine.api package contains a set of interfaces and implementation classes that supports integrating the runtime part of BIRT into an application.

The BIRT Report Engine can provide report generation and rendering services in the following environments:

  • Stand-alone engine: A Java developer uses a stand-alone engine to render a BIRT report from a report design (.rptdesign) file. In this environment, the Java developer creates a command-line application that writes a report to disk, either in HTML or PDF format.
  • BIRT report viewer: BIRT Report Designer uses the BIRT report viewer to view a report as paginated HTML. The BIRT report viewer is a Web application that runs in the Tomcat Application Server embedded in Eclipse. This viewer contains an embedded BIRT report engine.
  • Customized report designer: A customized report design environment uses an embedded BIRT report engine to preview a report.
  • Web application: A Web application similar to the BIRT report viewer uses an embedded BIRT report engine to generate a Web-based report.
This article describes how to develop a customized report generation application that performs the following tasks:
  • Creates and configures a report engine
  • Opens a report design or report document
  • Accesses data from a data source
  • Generates a report in a supported output format
  • Shuts down the engine
Creating and Configuring a Report Engine
The main interfaces and classes in the org.eclipse.birt.report.engine.api package are:
  • ReportEngine
  • EngineConfig
  • IReportRunnable
  • IRenderOption and its descendants
  • IEngineTask and its descendants
A report engine is an instantiation of the ReportEngine class. This object is the key component in any reporting application. It provides access to runnable report designs, parameters, the structure of a report design, and the task for generating a report from a report design. You can use the ReportEngine object to perform the following tasks:
  • Get a configuration object.
  • Open a report design or a report document.
  • Create an engine task to get parameter definitions and set parameter values.
  • Create an engine task to access data from a data set.
  • Get supported report formats and MIME types.
  • Create an engine task to run a report or render a report to an output format.
  • Create an engine task to extract data from a report document.
  • Clean up and shut down the engine.
A single report engine object can generate multiple reports from multiple report designs. Each application, whether it's stand-alone or Web-based, only needs to create one ReportEngine instance. The BIRT report engine is thread-safe, so this single-instance recommendation is not a restriction. At termination, the application should call shutdown( ) to unload extensions and delete temporary files.

The EngineConfig class contains the configuration settings for the report engine. Use the EngineConfig object to specify the settings for the following properties:

  • HTML emitter configuration for custom handling of images or actions for HTML output
  • Logging to set the logging file location and level
  • Platform context to indicate whether the application and engine home are in a stand-alone environment or packaged as a WAR file
  • Resource files to set the location where the reporting application can access libraries and properties files
  • Scripting configuration to provide external values and Java resources to scripting methods
The engine home is the key property that the report engine requires. The report engine cannot parse the report design or run the report without a defined engine home. For a stand-alone application, the engine home is an absolute path to a file system location. For an application running from a WAR file on an application server, the engine home is a relative path in the WAR file.

Two engine configuration properties depend on whether the environment in which the application runs is stand-alone or in a WAR file on an application server. These properties are the platform context and the HTML emitter configuration. The platform context provides the report engine with the mechanism to access files. The HTML emitter configuration provides the functionality for processing images and handling hyperlinking and bookmark actions.

A ReportEngine constructor takes the EngineConfig object as its argument. If the configuration object is null, the report engine uses the default configuration. If the configuration object is null, the environment must provide a BIRT_HOME variable that specifies the directory containing the engine plug-ins and JAR files.

Listing 1 shows how to set up a report engine in a stand-alone application. The application uses the engine home located in the BIRT runtime directory. The report output format is HTML. The application configures the HTML emitter and creates the report engine using the settings contained in the EngineConfig object.

Opening a Report Design or Report Document
BIRT Report Engine can generate a report from either a report design or an existing report document. To open a report design, call one of the openReportDesign( ) methods on ReportEngine. These methods instantiate an IReportRunnable object using a String object that specifies the path to a report design or an input stream.

To open a report document, call the ReportEngine.openReportDocument( ) method. This method instantiates an IReportDocument object using a String object that specifies the path to a report document (.rptdocument) file. This method returns the IReportDocument object. You must handle the EngineException that these methods throw.

The IReportRunnable object provides direct access to basic properties of the report design. The names of report design properties are static String fields, such as IReportRunnable.AUTHOR. To access a report design property, use the getProperty( ) method with a string argument that contains one of these fields.

To access and set the values of parameters, use methods on a parameter definition task object, described later in this article. Listing 2 shows how to open a report design and find a property value. If the engine cannot open the specified report design, the code shuts down the engine. The variable, engine, is a ReportEngine object.

The IReportDocument object provides access to the data in a report and the report's structure. IReportDocument provides methods to retrieve table of content entries, bookmarks, and page information.

To access table of content entries, use the findTOC( ) method. This method takes a TOCNode argument and returns a TOCNode object. To find the root table of contents entry, use a null argument. To find the subentries of a table of contents entry, use the getChildren( ) method. This method returns a list of TOCNode objects. From a TOCNode object, you can retrieve the display value of the entry and a Bookmark object.


More Stories By Jason Weathersby

Jason Weathersby is a member of the extended BIRT development team at Actuate Corporation and has backgrounds in both computer science and technical writing. He has many years experience in technical consulting, training, writing, and publishing about reporting, business intelligence tools, and database technologies.

More Stories By Tom Bondur

Tom Bondur is a member of the extended BIRT development team at Actuate Corporation and has backgrounds in both computer science and technical writing. He has many years experience in technical consulting, training, writing, and publishing about reporting, business intelligence tools, and database technologies.

More Stories By Jane Tatchell

Jane Tatchell is a content development manager in the Developer Communications group of Actuate Engineering.

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
Most technology leaders, contemporary and from the hardware era, are reshaping their businesses to do software in the hope of capturing value in IoT. Although IoT is relatively new in the market, it has already gone through many promotional terms such as IoE, IoX, SDX, Edge/Fog, Mist Compute, etc. Ultimately, irrespective of the name, it is about deriving value from independent software assets participating in an ecosystem as one comprehensive solution.
SYS-CON Events announced today that EARP will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. "We are a software house, so we perfectly understand challenges that other software houses face in their projects. We can augment a team, that will work with the same standards and processes as our partners' internal teams. Our teams will deliver the same quality within the required time and budget just as our partn...
SYS-CON Events announced today that delaPlex will exhibit at SYS-CON's @ThingsExpo, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. delaPlex pioneered Software Development as a Service (SDaaS), which provides scalable resources to build, test, and deploy software. It’s a fast and more reliable way to develop a new product or expand your in-house team.
SYS-CON Events announced today that Tappest will exhibit MooseFS at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. MooseFS is a breakthrough concept in the storage industry. It allows you to secure stored data with either duplication or erasure coding using any server. The newest – 4.0 version of the software enables users to maintain the redundancy level with even 50% less hard drive space required. The software func...
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).
SYS-CON Events announced today that Outscale, a global pure play Infrastructure as a Service provider and strategic partner of Dassault Systèmes, will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Founded in 2010, Outscale simplifies infrastructure complexities and boosts the business agility of its customers. Outscale delivers a secure, reliable and industrial strength solution for its customers, which in...
SYS-CON Events announced today that Outscale will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Outscale's technology makes an automated and adaptable Cloud available to businesses, supporting them in the most complex IT projects while controlling their operational aspects. You boost your IT infrastructure's reactivity, with request responses that only take a few seconds.
SYS-CON Events announced today that Systena America will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Systena Group has been in business for various software development and verification in Japan, US, ASEAN, and China by utilizing the knowledge we gained from all types of device development for various industries including smartphones (Android/iOS), wireless communication, security technology and IoT serv...
DevOps at Cloud Expo – being held October 31 - November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA – announces that its Call for Papers is open. Born out of proven success in agile development, cloud computing, and process automation, DevOps is a macro trend you cannot afford to miss. From showcase success stories from early adopters and web-scale businesses, DevOps is expanding to organizations of all sizes, including the world's largest enterprises – and delivering real r...
Five years ago development was seen as a dead-end career, now it’s anything but – with an explosion in mobile and IoT initiatives increasing the demand for skilled engineers. But apart from having a ready supply of great coders, what constitutes true ‘DevOps Royalty’? It’ll be the ability to craft resilient architectures, supportability, security everywhere across the software lifecycle. In his keynote at @DevOpsSummit at 20th Cloud Expo, Jeffrey Scheaffer, GM and SVP, Continuous Delivery Busine...
In order to meet the rapidly changing demands of today’s customers, companies are continually forced to redefine their business strategies in order to meet these needs, stay relevant and continue to see profitable growth. IoT deployment and development is integral in this transformation, and today businesses are increasingly seeing the value of investing their resources into IoT deployments. These technologies are able increase ROI through projects such as connecting supply chains or enabling sm...
SYS-CON Events announced today that CollabNet, a global leader in enterprise software development, release automation and DevOps solutions, will be a Bronze Sponsor of SYS-CON's 20th International Cloud Expo®, taking place from June 6-8, 2017, at the Javits Center in New York City, NY. CollabNet offers a broad range of solutions with the mission of helping modern organizations deliver quality software at speed. The company’s latest innovation, the DevOps Lifecycle Manager (DLM), supports Value S...
SYS-CON Events announced today that Peak 10, Inc., a national IT infrastructure and cloud services provider, will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Peak 10 provides reliable, tailored data center and network services, cloud and managed services. Its solutions are designed to scale and adapt to customers’ changing business needs, enabling them to lower costs, improve performance and focus intern...
Everywhere we turn in our industry we can find strong opinions about the direction, type and nature of cloud’s impact on computing and business. Another word that is used in every context in our industry is “hybrid.” In his session at 20th Cloud Expo, Alvaro Gonzalez, Director of Technical, Partner and Field Marketing at Peak 10, will use a combination of a few conceptual props and some research recently commissioned by Peak 10 to offer a real-world consideration of how the various categories of...
A strange thing is happening along the way to the Internet of Things, namely far too many devices to work with and manage. It has become clear that we'll need much higher efficiency user experiences that can allow us to more easily and scalably work with the thousands of devices that will soon be in each of our lives. Enter the conversational interface revolution, combining bots we can literally talk with, gesture to, and even direct with our thoughts, with embedded artificial intelligence, whic...
SYS-CON Events announced today that Super Micro Computer, Inc., a global leader in compute, storage and networking technologies, will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 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/...
With major technology companies and startups seriously embracing Cloud strategies, now is the perfect time to attend @CloudExpo | @ThingsExpo, June 6-8, 2017, at the Javits Center in New York City, NY and October 31 - November 2, 2017, Santa Clara Convention Center, CA. Learn what is going on, contribute to the discussions, and ensure that your enterprise is on the right path to Digital Transformation.
Multiple data types are pouring into IoT deployments. Data is coming in small packages as well as enormous files and data streams of many sizes. Widespread use of mobile devices adds to the total. In this power panel at @ThingsExpo, moderated by Conference Chair Roger Strukhoff, panelists will look at the tools and environments that are being put to use in IoT deployments, as well as the team skills a modern enterprise IT shop needs to keep things running, get a handle on all this data, and deli...
SYS-CON Events announced today that SoftLayer, an IBM Company, has been named “Gold Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2016, at the Javits Center in New York, New York. SoftLayer, an IBM Company, provides cloud infrastructure as a service from a growing number of data centers and network points of presence around the world. SoftLayer’s customers range from Web startups to global enterprises.
In his opening keynote at 20th Cloud Expo, Michael Maximilien, Research Scientist, Architect, and Engineer at IBM, will motivate why realizing the full potential of the cloud and social data requires artificial intelligence. By mixing Cloud Foundry and the rich set of Watson services, IBM's Bluemix is the best cloud operating system for enterprises today, providing rapid development and deployment of applications that can take advantage of the rich catalog of Watson services to help drive insigh...