iRule to define pool names based on URI mapped to a value in a data group.

Hi, according to documentation, "class match" is more performatic than "matchclass".

I think you did a good job and I just made some changes which sounds better to me.

when HTTP_REQUEST {
    set value [class match -value [string tolower [HTTP::path]] contains APP_DEV_uri_pool_map]
    if { $value ne "" } {
        pool APP-BW-DEV-$value
    } else {
        log local0. "uri-map-lookup-failed: from: [IP::remote_addr] for request: [HTTP::host] [HTTP::uri]"
        HTTP::respond 404 content {
            
            
            Not found
            Not found
            The requested page or resource was not found.
            
        }
    }
    unset value
}

Maybe it should be improved with pool selection check.

when HTTP_REQUEST {
    set value [class match -value [string tolower [HTTP::path]] contains APP_DEV_uri_pool_map]
    if { $value ne "" } {
        if { [catch { pool APP-BW-DEV-$value }]  } {
            log local0.warn "uri-map-selection-failed: from: [IP::remote_addr] for request: [HTTP::host] [HTTP::uri] pool: APP-BW-DEV-$value"
            HTTP::respond 500 content {
                
                
                Internal Server Error
                Internal Server Error
                The server encountered an internal error or misconfiguration and was unable to complete your request.
                
            }
        }
    } else {
        log local0.notice "uri-map-lookup-failed: from: [IP::remote_addr] for request: [HTTP::host] [HTTP::uri]"
        HTTP::respond 404 content {
            
            
            Not found
            Not found
            The requested page or resource was not found.
            
        }
    }
    unset value
}

Respectfully,