Report development

Compatibility: BIRT 4.4.2

This quick start guide presents the best practices for developing reports using Business Intelligence and Reporting Tools (BIRT). It is intended for developers who wish to create reports using BIRT and Centreon MBI. Knowledge of the SQL language is a prerequisite.

This documentation does not describe how to reuse Centreon MBI development libraries.

This guide introduces:

• The main concepts of BIRT.
• The different steps in creating a BIRT report project.

BIRT is a report design tool. It allows you to:

• Use multiple data sources.
• Extract relevant data for your report from these sources.
• Format (graphically design) the report.

BIRT enables you to visualize your business data as statistics in the form of tables or graphs. Although BIRT allows you to manipulate different data sources within the same report, we advise against it when performing heavy calculations or aggregations. Extract Transform Load (ETL) software is more suitable for that purpose.

This guide will only describe basic BIRT concepts and methods for designing reports (blue box in the above diagram).

BIRT Concepts

Data sources

When designing a report, you may require several data sources from a number of storage systems accessible through different protocols:

• Delimited flat files (CSV).
• JDBC data sources (MariaDB, etc.).
• XML files.
• Web services.

BIRT also allows you to script your own data sources accessed by Java or Javascript objects.

We highly recommend collecting and consolidating report data into a single type of data source, and storing it as such (e.g., a MariaDB data). Multiplying your data sources in a report might have an impact on performance and maintenance. You are advised not to use more than two types of data source in the same report project (e.g., JDBC and CSV).

Configuration of a data source:

Data sets

You may want to extract a data sample from an application database or a large CSV file. The BIRT "data set" allows you to write queries or select specific data from simple or complex data sources.

The different data sets defined in a report will contain all the available data to build the visuals in the report (e.g., tables and charts).

{width="18.401cm" height="5.117cm"}

Data binding

Once the data set is created, the selected data must be formatted in the report. To populate a graph or a table with data, you will need to perform a "data binding" operation between a data set and a graphic component, such as a table or chart.

Data binding will copy the structure of the data set into the configuration of the graphical component. The complete structure (columns) of a data set does not need to be copied to the layout, only the required columns.

Data binding is performed when you create a table or chart:

If you modify the structure of the data set, you will need to manually edit the graphical component and apply this change (e.g., when extracting a new column from the data set to be used in a previously created chart):

Report parameters

Report parameters are global variables that are specific to each report. Declared before generating the report, they are used instead of static values to create dynamic content. For example, a report can be generated for:

• A specific time period defined using two parameters (types "Date" and "Time") identifying the period start and end dates.
• A specific host group specified by a report parameter.

Therefore, using report parameters will allow you to use the same report design to display different statistics depending on the parameters (e.g., the same Centreon Availability report used for different host groups and different reporting periods).

Report layout

Grid

The grid component is mainly used to organize graphical components on the report.

Best practice: Insert each report component (e.g., chart, table, label, text) into a grid cell.

Table

The table is used to display dynamic content in a row-and-column format. The values of a table vary according to the data set used for the data binding.

Table structure

• Header: Displays the column title or dynamic summary information calculated according to the listed values in the detail rows. The header row can be repeated at the beginning of each section if the table is displayed over several pages.
• Detail row: A new detail row will be created to display each row of the data set (to which the table is bound).
• Footer: Summary information, such as total or average values from the detail rows, can be displayed once in the last line of the table.

Grouping & aggregating data

A data set can return a large number of rows. You can sort and organize these rows using the table's grouping function. Each group will add two rows to the table:

• Group header: Initializes and identifies each entry. Allows statistics to be calculated using this data group.

• Group footer: Delimits the end of each entry. Also allows the data group to be used for calculations.

  

Charts

A chart can be created in three steps:

Selecting the graph type

Binding the data

There are two ways to "bind" data to a chart:

• Link the data set directly to the chart.
• Insert the chart into a table cell. This will allow the chart to "inherit" the data from the table, thus binding it.

Data inheritance from a parent component is required if you decide to reuse data groups and aggregated data in a chart.

Formatting the chart

BIRT Libraries

A report can contain a large number of components (data sources, data sets, charts, tables). When stored in a shared library, components developed for one report can be used in others.

BIRT libraries (.rptlibrary files) store shared components. Libraries are useful for:

• Saving time when developing a report.
• Easy maintenance of reports. A bug fix or modification of a component in the library will be applied to every report sharing this component.
• A component from a library can be "overloaded" in a report as an override in order to change its appearance or variable parameters.

Operating principle:

• Each report project has a specific folder that stores all the shared resources (e.g., images, BIRT rptlibrary files, CSS files) to be accessed in the report through a relative path.
• You can navigate using the "resource explorer" panel in Eclipse BIRT in the resource (rptlibrary) and drag-and-drop the component you need to import into the report.
• Each component imported from a library is marked by a specific icon in the report.

BIRT Templates

The report templates (.rpttemplate) serve a different function than the report libraries. The purpose of a report template is to provide a starting point for a new report. A report template can contain the following:

• The layout for a new report
• Master pages (headers and footers)
• Data sources
• Data sets
• Graphical components
• Scripting.

When you start to develop a new report, you can borrow every reusable component from a template. Components can also be imported from BIRT libraries.

A new report has no relationship with the original template whose content has been borrowed. Therefore, any change made to that template cannot affect the reports that use it.

Preparing the development environment

Creating a workspace

When you first launch Eclipse BIRT, you will need to create a workspace to hold your BIRT reporting projects. We recommend that you create a workspace directory that is separate from the Eclipse BIRT installation (system) directory. This type of configuration will allow you to change the BIRT version easily without affecting your project folders.

After creating the workspace and before starting to design any report, you must create a BIRT project containing two main directories:

• / reports: Contains all your reports (.rptdesign files).
• /Resources: Contains any files or components that will be made accessible to your reports through relative paths.

Creating a new project

To create a BIRT report project, select "File > New > Other projects", and then, in the wizard window, select "Report project":

After creating the project, add your two main folders with a right-click on the project displayed in the "Navigator" tab panel:

Now, copy the contents of the reports (/usr/share/centreon-bi/reports) and resources (/usr/share/centreon-bi/Resources) directories on the reporting server into the two folders you created in your project.

The resources folder

For each BIRT project created in this workspace, you will need to define, in project properties, the location of the corresponding Resources folder.

This will allow the shared components (e.g., datasources, data sets, report parameters and layout components from BIRT libraries, as well as BIRT report templates and image or flat files) to be referenced in reports through the "Resource Explorer" panel:

Each component imported from "Shared resources" into the report (.rptdesign file) will be referenced through a relative path. This will enable you to migrate your project into another workspace or Centreon MBI reporting server without indicating the full path of your installed workspace.

For example, if your workspace is located in C:DocumentsusernameCentreon-Bi-WorkspaceMyFirstProject, only the subfolders and files in your project "MyFirstProject" need to be set.

To define the shared-resource folder in the project environment, right-click your project in the Navigator panel, and then select Properties. Set the resource folder as "<Current Project Folder>/Resources/". Because the pattern "<Current Project Folder>" is a variable that will be set automatically by Eclipse, there is no need to write the project path explicitly.

You will have to repeat this procedure every time:

• You export and import the project into another workspace.
• You create a new project.

Connecting to databases

Introduction

Information for connecting to databases is defined in the following two files:

• /etc/centreon-bi/cbis-profile.xml
• /etc/centreon-bi/reports-profile.xml

Copy both of these files to your workstation.

In each of these .xml files, you must update the IP addresses for both the Centreon database ("Centreon") and for the Centreon storage database ("Censtorage").

• cbis-profile.xml file should contain the addresses of the monitoring database server.
• reports-profile.xml should contain the addresses of the reporting database server.

Update the username and the password of these files, if necessary.

From your workstation, grant the appropriate privileges for the defined users to connect to the above servers.

Configuring the L2_datasources library

Warning

Never upload the L2_Datasource.rptlibrary file to your reporting server. This will delete the configuration for connection to the MariaDB server and cause Centreon MBI (for ETL & report generation) to crash.

All standard reports use the library L2_datasources to connect to data. Therefore, this library must point to the appropriate servers (monitoring DB and the reporting DB servers).

You must then link the L2_datasource library to the updated profile files on your workstation.

To do so, double-click the library L2_datasource. The library opens in your workspace.

Click "Outline" and expand the "Datasources".

The datasources used in Centreon MBI standard reports are listed.*

Double-click the "Datasource" in Centreon, and the following pop-up opens:

In "Connection Profile Store" select the path to the report-profile.xml file on your workstation, and validate.

The following pop-up opens:

All the datasources present in the file are listed.

In this example, two datasources are listed: - Censtorage - Centreon

Select Centreon, and then click the "BIRT JDBC Datasource".

The information defined in the XML file is read.

Click "Test Connection". A pop-up appears, displaying the message "Connection successful".

In case of an error message indicating a missing driver, add the MariaDB driver ( .jar) from the "Manage drivers" menu.

This operation should only be performed once for the project. :::

Repeat the same procedure for these datasources: centreon_storage, centreon_live et centreon_storage_live.

Datasource	Profile file	Profile to use
Censtorage	creports-profile.xml	Censtorage
Centreon_Live	cbis-profile.xml	Centreon
Censtorage_Live	cbis-profile.xml	Censtorage

Generating a standard report

To generate a standard report from the interactive development environment, double-click the report to open it.

Once the report is open, click "View report" to select the output format:

A pop-up opens, asking for the report parameters to be filled in.

The report will be generated according to the parameter criteria selected, in the desired output format.

Developing your own reports

Using Centreon report templates

To make sure the reports you develop with BIRT are compatible with Centreon MBI, you must use the template provided by Merethis as a starting point. This template, called "generic_component_script.rpttemplate", is stored in /usr/share/centreon-bi/Resources/templates (default template directory). Using this template is mandatory because it adds certain scripting to your report that is required for it to function on our platform.

To use this template in your BIRT report:

• Download the file from the reporting server to the "Resources" folder of your BIRT project: /Resources/templates/generic_component_script.rpttemplate
• Right-click the template and select "Register Template with New Report Wizard".

• For each new report you create, select the name and click Next to access the template window.
• Select the template called "Component template" and click "Finish".

Define the project structure

We highly recommend defining and applying standard conventions for:

• Creating a directory tree for reports and resources.
• Naming directories and files.
• Naming components in BIRT libraries, templates and reports.

Naming and organizing files in a consistent and descriptive way will help you to maintain and update your projects.

The following information in this chapter discusses the standards defined by Centreon.

Report designs (RPTDESIGN)

• Each report is stored in a folder or subfolder of the main "reports" folder. The name of a folder should be defined according to the type of statistics processed in the report:
  • Capacity
  • Availability
  • Performance.
• Reports whose parent folder is the main folder "reports" have been deprecated since Centreon MBI version 1.5.
• All components of a report (e.g., layout, dataset) are imported from a BIRT library.
• Each report must be created from a BIRT report template, which uses scripting to manage the multi-select parameters and Cascading Style Sheets (CSS).

Resources

The Centreon MBI shared resource directory (/Resources) contains four subdirectories:

• /images: Contains images used in reports.
• /templates: Contains the BIRT templates used as a starting point for any report.
• /translations: Contains the localization (foreign language translation) files.
• /components: Contains all the BIRT libraries (.rptlibrary) organized into subdirectories named meaningfully according to the reports (e.g., capacity, performance).

Libraries

Some libraries are stored directly under the "/components" directory, without any classification into subdirectories. These libraries contain components that may be reused in other libraries, but also in reports:

• /datasources: Contains all the datasources that will be used for the entire report project. Avoid defining datasources in multiple files in order to simplify the maintenance of your project (in case you change development or production environments).
• /parameters: Contains all the report parameters that will be required in the reports.
• /masterpages: Stores the different masters (headers and footers) that will be reused in the reports.

The potentially large number of components in the libraries can make navigating for a specific component complicated. To simplify the way components are organized, ask yourself the following questions:

• What kind of statistic are you looking for?
  • Capacity? Performance? Availability? Open the subfolder named according to your requirement.
• What type of object do you need when designing your report?
  • A host? A single host group? Several host groups? You will find this information in the descriptive name of the ".rptlibrary" file.
• Do you require a data set? With what kind of parameters?
  • All the data sets are listed in the "Data explorer" panel.
  • The name of each data set is prefixed by a code. Each digit in this code signifies an object (e.g., hostgroup, host, service category, host category, metric, timeperiod) and can vary from 0 to 2:
    • 0: The object is not used as a parameter.
    • 1: A single value is expected.
    • 2: A list of multiple values is expected.
• Do you require a graphical component? With which parameters?
  • All graphical components are listed in the "Outline" panel in the menu "Report Items".
  • The name of each component is prefixed by a code using the same naming convention as the data set (see above).
  • The name of the component is suffixed with the component type (e.g., graph, text, table)

Warning

Do NOT modify any of the original standard report templates or libraries.

Deploying a report on Centreon MBI

Centreon MBI provides scheduling and publishing functionality for BIRT reports. Once you have designed your report, you will not need to use Eclipse BIRT to generate your reports. Non-technical users will be able to run the reports in a few clicks from the Centreon graphical user interface (GUI) without having to resort to Eclipse BIRT.

Steps for deploying a report on Centreon MBI:

Create the XML file describing the required parameters

Each RPTDESIGN file that you create contains different report parameters. To display them in the Centreon MBI GUI and be able to use them, you must define an XML file that will dynamically generate a parameter tab.

When creating a new report design on the interface, you must associate it with the XML parameter file. Three types of object can be defined in this XML file:

• Text tags to allow users to type in their own text:
• Selection tags:
• Multi-select tags: .

Each of these sets of markup tags has several possible attributes:

Attribute	Description	text	select	multiselect
id	Name of the parameter in the report (report parameter)	X	X	X
title	Description field displayed next to the parameter	X	X	X
data	Data to display in the parameter	X	X
size	Size of the text field	X

Below are the possible values for the data attribute:

Value

• host
• hostgroup
• hostcategory
• servicegroup
• servicecategory
• metric
• businessview
• businessactivity
• liveservice*
• timeperiodBA

*liveservice corresponds to the business time period (i.e: 24x7)

Single- and multiple-selection lists are restricted through Centreon ACLs. Users with restrictions on Centreon resources will also be restricted on the Centreon MBI interface.

Warning

If you want to use our default date picker and use the date parameter (cyclical or on-demand) in your report, you must use the two "known" parameters, "dateStart" and "dateEnd".

Below is an example of an XML file (Host-detail-2):

    <?xml version="1.0" encoding="iso-8859-1"?>
    <objects>
    <select id="portrait_master_logo" data="logo" title="Portrait master page logo"/>
    <select id="landscape_master_logo" data="logo" title="Landscape master page logo"/>
    <select id="liveserviceID" data="liveservice" title="Select reporting live service" />
    <text id="evolutionInterval"  title="Number of month to show in trend graphs" size="5"/>
    <select id="One-hostID" data="host" title="Select the host to report" />
    <select id="One-servicecategoryID_cpu" data="servicecategorie" title="Service category containing CPU service(s)" />
    <multiselect title="Filter on CPU metrics to INCLUDE" id="metricNAME_cpu" data="metric"/>
    <multiselect id="servicecategoryID_storage" data="servicecategory" title="Service category containing Storage service(s)" />
    <multiselect title="Filter on Storage metrics to EXCLUDE " id="metricNAME_storage" data="metric"/>
    <select id="One-servicecategory_memory" data="servicecategorie" title="Service category containing Memory service(s)" />
    <multiselect title="Filter on Memory metrics to INCLUDE" id="metricNAME_memory" data="metric"/>
    </objects>

Deploy the report

On the reporting server

Copy your report design to the reporting server. The "reports" and "Resources" folders are found in the main Centreon MBI folder. The directory tree for your reports and resources must be same as in your Eclipse BIRT project.

On the monitoring server

In the "Reporting > Business Intelligence > Report designs" menu on Centreon, add the new report design, and define the following properties:

• A name for the report design
• The report location on the reporting server (relative path under /usr/share/centreon-bi/reports)
• An XML source file that will describe the report parameters of the previously created report design.

Running the report job

In the Reporting > Business Intelligence > Jobs menu, define a job to run your report design, and fill in all the specific report parameters.