Study notes (1)--crystal Enterprise components

Crystal Enterprise Components

1. Crystal Enterprise SDK
Contains a library of many tools for creating published Web reports. Provides users with the ability to log in to Crystal Enterprise System, create objects (directories and reports), and view reports, report generation plans, and export reports.
2. RAS SDK
Contains a library for creating tools for designing Web reports. Users can create new reports or add, remove, modify objects (such as tables, graphs, fields) to existing reports.
3. Crystal Viewer SDK
A library that contains tools to display a customizable report display view of a Web report. It also provides an interface for exporting reports to many other format files.
4. Crystal Enterprise Framework
A universal platform that supports all Crystal Enterprise products, based on an extensible architecture that allows communication and data exchange between components, supporting the integration of third-party products and technologies. Crystal Reporting Framework is an open platform that supports various information entities, in Crystal Enterprise, information entities are called infoobjects.
Each infoobjects is stored in the Cmsinfostore. Once they are removed from the CMS, they can be specified by the Crystal Enterprise plugins in the Java interface form. If you want to access the properties and methods of the specified object, you must do so through the plugin interface provided by each plugin.
5. Application Server
Serves as a gateway between the Web server and other components in Crystal Enterprise. Application server processes JSP requests and sends them out to the JDK for processing. When a user accesses a page using the DHTML browser, it also transforms the report file (. epf file) into HTML format through the JDK.
6. Web Component Adapter (WCA)
An optional component that runs in Application server. It is used when a crystal Server Page (. CSP) request needs to be processed. WCA provides all of the services provided by WCS.
WCA assumes two basic roles: 1. Handle csp;2. Support for crystal applications that previously relied on WCS.
7. Crystal Management Server (CMS)
Maintains a database that is used to manage the information needed for the Crystal Enterprise framework. CMS has four main functions: 1. Maintain security (user management), 2. Manage Objects (directories and reports), 3. Manage Services (services), 4. Management audits (System audits).
8. Input File Repository Server
Save all report and program objects that are published by the system administrator and other users.
9. Output File Repository Server
Manages all report instance and program instances that are generated by the reports job server and the programs job server.
Ten. Event Server
Manage file-based events. This includes monitoring file-based events and notifying the CMS when an event occurs.
One. Cache Server
Captures all requests from the Report Viewer, and any requests that the cache Server cannot process are forwarded to the page Server.
Page Server
As a response to requests from the cache server, page server processes reports and generates pages that encapsulate page format (EPF). The EPF page contains formatting information that defines the layout of the report. Page server obtains data from the most recent report instance, or directly from the database (requires user requests and has access to the report object).
Page server and cache server interact to ensure that cached EPF pages are used as frequently as possible and generated as soon as a new page is requested.
Page server is used only to view reports, and if you want to create and modify reports, you must use RAS.
Note: If the default viewer is the Advanced DHTML Viewer, then the report will be processed by RAS.
Report Job Server
Process the scheduled report managed by the CMS and generate the report instance. The report JOB server accesses the database to obtain the most recent data generation reporting instance.
. program Job Server
Handles scheduler managed by the CMS, such as Java programs and scripts. When the scheduler is processed, program JOB server obtains the programs file from the input file Repository server before executing the program.
. Report Application Server (RAS)
Handle reports that users view using the Advanced DHTML Viewer. Services for creating and modifying reports are also available, and reports can be saved to the CMS.
RAS server, which is part of the Crystal Enterprise distribution, is known as managed RAS. RAS server, which is installed as a standalone product, is known as unmanaged RAS.
RAS is very similar to page Server, which also responds to requests for pages, processes reports, and generates EPF files. However, RAS uses an internal caching mechanism that does not include interaction with the cache server.