Optimizing the Performance of the Forms Service

Last update: June 24, 2024

CREATED FOR:

  • Developer

Samples and examples in this document are only for AEM Forms on JEE environment.

Optimizing the Performance of the Forms Service

When rendering a form, you can set run-time options that will optimize the performance of the Forms service. Another task that you can perform to improve the performance of the Forms service is to store XDP files in the repository. However, this section does not describe how to perform this task. (See Invoking a service using a Java client library.)

NOTE
For more information about the Forms service, see Services Reference for AEM Forms.

Summary of steps

To optimize the performance of the Forms service while rendering a form, perform the following tasks:

  1. Include project files.
  2. Create a Forms Client API object.
  3. Set performance run-time options.
  4. Render the form.
  5. Write the form data stream to the client web browser.

Include project files

Include necessary files into your development project. If you are creating a client application using Java, include the necessary JAR files. If you are using web services, ensure that you include the proxy files.

Create a Forms Client API object

Before you can programmatically perform a Forms service Client API operation, you must create a Forms service client. If you are using the Java API, create a FormsServiceClient object. If you are using the Forms web service API, create a FormsService object.

Set performance run-time options

You can set the following performance run-time options to improve the performance of the Forms service:

  • Form caching: You can cache a form that is rendered as PDF in the server cache. Each form is cached after it is generated for the first time. On a subsequent render, if the cached form is newer than the form design’s timestamp, the form is retrieved from the cache. By caching forms, you improve the performance of the Forms service because it does not have to retrieve the form design from a repository.
  • Form Guides (deprecated) may take longer to render than other transformation types. It is recommended that you cache form Guides (deprecated) to improve performance.
  • Standalone option: If you do not require the Forms service to perform server-side calculations, you can set the Standalone option to true, which results in forms being rendered without state information. State information is necessary if you want to render an interactive form to an end user who then enters information into the form and submits the form back to the Forms service. The Forms service then performs a calculation operation and renders the form back to the user with the results displayed in the form. If a form without state information is submitted back to the Forms service, only the XML data is available and server-side calculations are not performed.
  • Linearized PDF: A linearized PDF file is organized to enable efficient incremental access in a network environment. The PDF file is valid PDF in all respects, and is compatible with all existing viewers and other PDF applications. That is, a linearized PDF can be viewed while it is still being downloaded.
  • This option does not improve performance when a PDF form is rendered on the client.
  • GuideRSL option: Enables form Guide (deprecated) generation using run-time shared libraries. This means the first request will download a smaller SWF file, plus larger shared-libraries that are stored in the browser cache. For more information, see RSL in the Flex documentation.
  • You can also improve the performance of the Forms service by rendering a form on the client. (See Rendering Forms at the Client.)

Render the form

To render the form after setting performance options, you use the same application logic as rendering a form without performance options.

Write the form data stream to the client web browser

After the Forms service renders a form, it returns a form data stream that you must write to the client web browser. When written to the client web browser, the form is visible to the user.

See also

Including AEM Forms Java library files

Setting connection properties

Forms Service API Quick Starts

Rendering Interactive PDF Forms

Rendering Forms as HTML

Creating Web Applications that Renders Forms

Optimize the performance using the Java API

Render a form with optimized performance by using the Forms API (Java):

  1. Include project files

    Include client JAR files, such as adobe-forms-client.jar, in your Java project’s class path.

  2. Create a Forms Client API object

    • Create a ServiceClientFactory object that contains connection properties.
    • Create an FormsServiceClient object by using its constructor and passing the ServiceClientFactory object.

  3. Set performance run-time options

    • Create a PDFFormRenderSpec object by using its constructor.
    • Set the form cache option by invoking the PDFFormRenderSpec object’s setCacheEnabled method and passing true.
    • Set the linearized option by invoking the PDFFormRenderSpec object’s setLinearizedPDF method and passing true.

  4. Render the form

    Invoke the FormsServiceClient object’s renderPDFForm method and pass the following values:

    • A string value that specifies the form design name, including the file name extension.
    • A com.adobe.idp.Document object that contains data to merge with the form. If you do not want to merge data, pass an empty com.adobe.idp.Document object.
    • A PDFFormRenderSpec object that stores run-time options to improve performance.
    • A URLSpec object that contains URI values that are required by the Forms service.
    • A java.util.HashMap object that stores file attachments. This is an optional parameter and you can specify null if you do not want to attach files to the form.

    The renderPDFForm method returns a FormsResult object that contains a form data stream that must be written to the client web browser.

  5. Write the form data stream to the client web browser

    • Create a javax.servlet.ServletOutputStream object used to send a form data stream to the client web browser.
    • Create a com.adobe.idp.Document object by invoking the FormsResult object ‘s getOutputContent method.
    • Create a java.io.InputStream object by invoking the com.adobe.idp.Document object’s getInputStream method.
    • Create a byte array and populate it with the form data stream by invoking the InputStream object’s readmethod and passing the byte array as an argument.
    • Invoke the javax.servlet.ServletOutputStream object’s write method to send the form data stream to the client web browser. Pass the byte array to the write method.

See also

Quick Start (SOAP mode): Optimizing performance using the Java API

Including AEM Forms Java library files

Setting connection properties

Optimize the performance using the web service API

Render a form with optimized performance by using the Forms API (web service):

  1. Include project files

    • Create Java proxy classes that consume the Forms service WSDL.
    • Include the Java proxy classes into your class path.

  2. Create a Forms Client API object

    Create a FormsService object and set authentication values.

  3. Set performance run-time options

    • Create a PDFFormRenderSpec object by using its constructor.
    • Set the form cache option by invoking the PDFFormRenderSpec object’s setCacheEnabled method and passing true.
    • Set the standalone option by invoking the PDFFormRenderSpec object’s setStandAlone method and passing true.
    • Set the linearized option by invoking the PDFFormRenderSpec object’s setLinearizedPDF method and passing true.

  4. Render the form

    Invoke the FormsService object’s renderPDFForm method and pass the following values:

    • A string value that specifies the form design name, including the file name extension.
    • A BLOB object that contains data to merge with the form. If you do not want to merge data, pass null.
    • A PDFFormRenderSpecc object that stores run-time options.
    • A URLSpec object that contains URI values that are required by the Forms service.
    • A java.util.HashMap object that stores file attachments. This is an optional parameter and you can specify null if you do not want to attach files to the form.
    • An empty com.adobe.idp.services.holders.BLOBHolder object that is populated by the method. This is used to store the rendered PDF form.
    • An empty javax.xml.rpc.holders.LongHolder object that is populated by the method. (This argument will store the number of pages in the form).
    • An empty javax.xml.rpc.holders.StringHolder object that is populated by the method. (This argument will store the locale value).
    • An empty com.adobe.idp.services.holders.FormsResultHolder object that will contain the results of this operation.

    The renderPDFForm method populates the com.adobe.idp.services.holders.FormsResultHolder object that is passed as the last argument value with a form data stream that must be written to the client web browser.

  5. Write the form data stream to the client web browser

    • Create a FormResult object by getting the value of the com.adobe.idp.services.holders.FormsResultHolder object’s value data member.
    • Create a javax.servlet.ServletOutputStream object used to send a form data stream to the client web browser.
    • Create a BLOB object that contains form data by invoking the FormsResult object’s getOutputContent method.
    • Create a byte array and populate it by invoking the BLOB object’s getBinaryData method. This task assigns the content of the FormsResult object to the byte array.
    • Invoke the javax.servlet.http.HttpServletResponse object’s write method to send the form data stream to the client web browser. Pass the byte array to the write method.

See also

Invoking AEM Forms using Base64 encoding

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