RouteOnAttribute

Set the "Routing Strategy" property to "Route to Property name".
For each route that a FlowFile might be routed to, add a new property. The name of the property should describe the route.
The value of the property is an Attribute Expression Language expression that returns a boolean value indicating whether or not a given FlowFile will be routed to the associated relationship.

For example, we might route data based on its file extension using the following properties:
    - "Routing Strategy" = "Route to Property Name"
    - "jpg" = "${filename:endsWith('.jpg')}"
    - "png" = "${filename:endsWith('.png')}"
    - "pdf" = "${filename:endsWith('.pdf')}"

The Processor will now have 3 relationships: `jpg`, `png`, and `pdf`. Each of these should be connected to the appropriate downstream processor.

Add a new property for each condition that must be satisfied in order to keep the data.
If the data should be kept in the case that any of the provided conditions is met, set the "Routing Strategy" property to "Route to 'matched' if any matches".
If all conditions must be met in order to keep the data, set the "Routing Strategy" property  to "Route to 'matched' if all match".

For example, to keep files whose filename ends with .txt and have a file size of at least 1000 bytes, we will use the following properties:
    - "ends_with_txt" = "${filename:endsWith('.txt')}"
    - "large_enough" = "${fileSize:ge(1000)}
    - "Routing Strategy" = "Route to 'matched' if all match"

Auto-terminate the 'unmatched' relationship.
Connect the 'matched' relationship to the next processor in the flow.

Add a new property for each condition that must be satisfied in order to drop the data.
If the data should be dropped in the case that any of the provided conditions is met, set the "Routing Strategy" property to "Route to 'matched' if any matches".
If all conditions must be met in order to drop the data, set the "Routing Strategy" property  to "Route to 'matched' if all match".

Here are a couple of examples for configuring the properties:
    Example 1 Use Case: Data should be dropped if its "uuid" attribute has an 'a' in it or ends with '0'.
      Here, we will use the following properties:
        - "has_a" = "${uuid:contains('a')}"
        - "ends_with_0" = "${uuid:endsWith('0')}
        - "Routing Strategy" = "Route to 'matched' if any matches"
    Example 2 Use Case: Data should be dropped if its 'uuid' attribute has an 'a' AND it ends with a '1'.
      Here, we will use the following properties:
        - "has_a" = "${uuid:contains('a')}"
        - "ends_with_1" = "${uuid:endsWith('1')}
        - "Routing Strategy" = "Route to 'matched' if all match"

Auto-terminate the 'matched' relationship.
Connect the 'unmatched' relationship to the next processor in the flow.

Choose a RecordReader that is appropriate based on the format of the incoming data.
Choose a RecordWriter that writes the data in the desired output format.

Add a single additional property. The name of the property should describe the criteria to route on. The property's value should be a RecordPath that returns `true` if the Record meets the criteria or `false` otherwise. This adds a new attribute to the FlowFile whose name is equal to the property name.

Connect the 'success' Relationship to RouteOnAttribute.

Set "Routing Strategy" to "Route to Property name"

Add two additional properties. For the first one, the name of the property should describe data that matches the criteria. The value is an Expression Language expression that checks if the attribute added by the PartitionRecord processor has a value of `true`. For example, `${criteria:equals('true')}`.
The second property should have a name that describes data that does not match the criteria. The value is an Expression Language that evaluates to the opposite of the first property value. For example, `${criteria:equals('true'):not()}`.

Connect each of the newly created Relationships to the appropriate downstream processors.