result

./target/debug/vector -q --config test.toml
{"bar":2}
{"foo":1}
{"baz":3}
{"foo":1}
{"bar":2}
{"baz":3}
{"bar":2}
{"foo":1}
{"baz":3}
{"bar":2}
{"foo":1}
{"baz":3}
{"bar":2}
{"foo":1}
{"baz":3}

vector.toml

[sources.in]
type = "generator"
format = "shuffle"
interval = 1
lines = ['[{"foo": 1}, {"bar": 2}, {"baz": 3}]']

[sources.tail_in]
type = "vector"
address = "127.0.0.1:9000"

[transforms.parse]
type = "remap"
inputs = ["in", "tail_in"]
source = '.message = parse_json!(string!(.message))'

[transforms.split]
type = "route"
inputs = ["parse"]
route.0 = '.message[0] != null'
route.1 = '.message[1] != null'
route.tail = 'length(array!(.message)) > 2'

[transforms.event1]
type = "remap"
inputs = ["split.0"]
source = '. = .message[0]'

[transforms.event2]
type = "remap"
inputs = ["split.1"]
source = '. = .message[1]'

[transforms.tail_events]
type = "remap"
inputs = ["split.tail"]
source = '.message = encode_json(slice!(array!(.message), 2))'

[sinks.tail_out]
type = "vector"
inputs = ["tail_events"]
address = "localhost:9000"

[sinks.out]
type = "console"
inputs = ["event1", "event2"]
encoding.codec = "json"