Multipart Writer

Overview

This Snap merges multiple binary documents into a single MIME "multipart" stream.



Snap views

View Description Examples of upstream and downstream Snaps
Input This Snap has exactly one binary input view.

Binary documents to be put together into a single binary output document
Output This Snap has exactly one binary output view.

A "multipart" binary document that contains the input documents.
Error

Error handling is a generic way to handle errors without losing data or failing the Snap execution. You can handle the errors that the Snap might encounter when running the pipeline by choosing one of the following options from the When errors occur list under the Views tab. The available options are:

  • Stop Pipeline Execution Stops the current pipeline execution when an error occurs.
  • Discard Error Data and Continue Ignores the error, discards that record, and continues with the remaining records.
  • Route Error Data to Error View Routes the error data to an error view without stopping the Snap execution.

Learn more about Error handling in Pipelines.

Snap settings

Legend:
  • Expression icon (): Allows using pipeline parameters to set field values dynamically (if enabled). SnapLogic Expressions are not supported. If disabled, you can provide a static value.
  • SnapGPT (): Generates SnapLogic Expressions based on natural language using SnapGPT. Learn more.
  • Suggestion icon (): Populates a list of values dynamically based on your Snap configuration. You can select only one attribute at a time using the icon. Type into the field if it supports a comma-separated list of values.
  • Upload : Uploads files. Learn more.
Learn more about the icons in the Snap settings dialog.
Field / Field set Type Description
Label String

Required. Specify a unique name for the Snap. Modify this to be more appropriate, especially if more than one of the same Snaps is in the pipeline.

Default value: Multipart Writer

Example: Multipart Writer
Binary Header Properties The binary output document header can be modified by specifying properties in this table property. The "expression" column computes the value to insert and the "Target Path" is a JSONPath where the value should be set in the header. The headers are initially populated with the headers from the parts in the stream. These properties allow you to carryover values from the original multipart input document to the binary output documents.
Expression Dropdown list/Expression The value to insert into the header.
Target path String/Suggestion The path where the result of the expression should be written to in the header.

Example: $['content-location']
Group Identifier Dropdown list/Expression This property can be used to generate multiple binary output documents. By default, the Snap generates a single binary document containing parts for all of the input documents. If you need to generate multiple binary output documents, you can use this property to close out the previous document and start a new one. The property is treated as an identifier for each "group". The value of the identifier isn't meaningful to the Snap. It is only looking to see if the values changes from one input document to the next. When the value does change, then a new output document is started.
Snap execution Dropdown list
Choose one of the three modes in which the Snap executes. Available options are:
  • Validate & Execute: Performs limited execution of the Snap and generates a data preview during pipeline validation. Subsequently, performs full execution of the Snap (unlimited records) during pipeline runtime.
  • Execute only: Performs full execution of the Snap during pipeline execution without generating preview data.
  • Disabled: Disables the Snap and all Snaps that are downstream from it.

Default value: Execute only

Example: Validate & Execute

Examples