How to run 2 loops simultaneously in bash script - bash

Question

I am very new in writing code, so it might be a silly question, but an answer is highly appreciated to enhance my learning. I have written a simple bash script as below. But how can I optimize this code by using loop, array? I can understand if I use two loops, I can make the lines of code shorter. Please help:
#!/bin/bash
zs=10.0.3.10
zb=/usr/local/bin/zabbix_sender
zh=zabbix
# ql1 = queue link
ql1=https://sqs.us-west-2.amazonaws.com/843390035802/testService1
val1=$(aws sqs get-queue-attributes --queue-url $ql1 --attribute-names ApproximateNumberOfMessages --region us-west-2 --output text | awk '{print $2}')
echo "$ql1 count is $val1"
$zb -z $zs -s $zh -k testService1 -o val1 >/dev/null 2>&1
ql2=https://sqs.us-west-2.amazonaws.com/853390078801/testService2
val2=$(aws sqs get-queue-attributes --queue-url $ql2 --attribute-names ApproximateNumberOfMessages --region us-west-2 --output text | awk '{print $2}')
echo "$ql2 count is $val2"
$zb -z $zs -s $zh -k testService2 -o val2 >/dev/null 2>&1
ql3=https://sqs.us-west-2.amazonaws.com/843393305801/testService3
val3=$(aws sqs get-queue-attributes --queue-url $ql3 --attribute-names ApproximateNumberOfMessages --region us-west-2 --output text | awk '{print $2}')
echo "$ql3 count is $val3"
$zb -z $zs -s $zh -k testService3 -o val3 >/dev/null 2>&1
ql4=https://sqs.us-west-2.amazonaws.com/875660005801/testService4
val4=$(aws sqs get-queue-attributes --queue-url $ql4 --attribute-names ApproximateNumberOfMessages --region us-west-2 --output text | awk '{print $2}')
echo "$ql4 count is $val4"
$zb -z $zs -s $zh -k testService4 -o val4 >/dev/null 2>&1
ql5=https://sqs.us-west-2.amazonaws.com/843390635802/testService5
val5=$(aws sqs get-queue-attributes --queue-url $ql5 --attribute-names ApproximateNumberOfMessages --region us-west-2 --output text | awk '{print $2}')
echo "$ql5 count is $val5"
$zb -z $zs -s $zh -k testService2 -o val5 >/dev/null 2>&1
In above code at this step
$zb -z $zs -s $zh -k testService2 -o val5 >/dev/null 2>&1 I used -k as different 5 values. So how can I arrange it and work the code as same as above?

Answer 1

One loop is sufficient to eliminate the code duplication, and we don't need an array - we can read one queue link after the other in the loop. The variable argument to the option -k can be extracted from the queue link by removing the URL part up to to last / with the shell parameter expansion ${parameter##word}.
zs=10.0.3.10
zb=/usr/local/bin/zabbix_sender
zh=zabbix
# ql = queue link
while read ql
do
val=$(aws sqs get-queue-attributes --queue-url $ql --attribute-names ApproximateNumberOfMessages --region us-west-2 --output text | awk '{print $2}')
echo "$ql count is $val"
$zb -z $zs -s $zh -k ${ql##*/} -o $val >/dev/null 2>&1
done <<END
https://sqs.us-west-2.amazonaws.com/843390035802/testService1
https://sqs.us-west-2.amazonaws.com/853390078801/testService2
https://sqs.us-west-2.amazonaws.com/843393305801/testService3
https://sqs.us-west-2.amazonaws.com/875660005801/testService4
https://sqs.us-west-2.amazonaws.com/843390635802/testService5
END