Extract Recent Past Saturday

[#1]

Hello Guys,

How to Extract recent past Saturday based on today date and is there any expression language to get by update attribute 

[#2 · Accepted solution]

@sachin_32 
You can accomplish by utilizing the "Advanced UI" capability found in the UpdateAttribute processor.

The advanced UI allows you to create Rules (think if these as an IF/Then capability).
So you would setup 3 rules:
1. If current date falls on Mon - Fri, do X
2. if current date falls on Sat, do nothing

3. if current date falls on Sun, do Y

Expression Language guide

Below you can see I have created 3 rules (Day1-5, Day6, and Day7)

Once you create a Rule, you need to provide a Condition (This is your boolean if statement)

In this case I am using it to figure out what the current day of the week with 1= Monday and 7 = Sunday and seeing if the day of the week is prior to Sat or after Sat in the current week.  

If a rules condition (if statement) resolves to a boolean "true", then the configured "Actions" (then statement) are evaluated. 

For my "Day1-5" rule, I set:
Condition:

${now():format('u'):lt(6)}

Action:

${now():toNumber():minus(${now():format('u'):plus(1):multiply(86400000)}):toDate():format("EEE, dd MMM yyyy")}

For my "Day6" rule, I set:

Condition:

${now():format('u'):equals(6)}

Action:

${now():format('EEE, dd MMM yyyy')}

For my "Day7" rule, I set:

Condition:

${now():format('u'):gt(6)}

Action:

${now():toNumber():minus(86400000):toDate():format("EEE, dd MMM yyyy")}

About above:
- The "now()" function returns the current date.

- 86400000 is the number of milliseconds in 1 day.
- So first I get the current date and convert it to milliseconds using the "toNumber()" function.
- Then for Day1-5, I am subtracting based on current day of week a multiple of days worth of milliseconds.
- For Day6, I am doing nothing other than reformatting the current days date.
- For Day7, I am just subtracting one day or 86400000 milliseconds

No matter which rule is applied the final date format i choose to write to an attribute named "PreviousSaturday" on the FlowFile is formatted using java simple date format "EEE, dd MMM yyyy"
Example: "Sat, 05 Mar 2022"

If you found this response assisted with your query, please take a moment to login and click on "Accept as Solution" below this post.

Thank you,

Matt