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92 lines
2.9 KiB
92 lines
2.9 KiB
{
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"XREADGROUP": {
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"summary": "Return new entries from a stream using a consumer group, or access the history of the pending entries for a given consumer. Can block.",
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"complexity": "For each stream mentioned: O(M) with M being the number of elements returned. If M is constant (e.g. always asking for the first 10 elements with COUNT), you can consider it O(1). On the other side when XREADGROUP blocks, XADD will pay the O(N) time in order to serve the N clients blocked on the stream getting new data.",
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"group": "stream",
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"since": "5.0.0",
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"arity": -7,
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"function": "xreadCommand",
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"get_keys_function": "xreadGetKeys",
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"command_flags": [
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"BLOCKING",
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"WRITE"
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],
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"acl_categories": [
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"STREAM"
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],
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"key_specs": [
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{
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"flags": [
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"RO",
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"ACCESS"
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],
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"begin_search": {
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"keyword": {
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"keyword": "STREAMS",
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"startfrom": 4
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}
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},
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"find_keys": {
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"range": {
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"lastkey": -1,
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"step": 1,
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"limit": 2
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}
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}
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}
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],
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"arguments": [
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{
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"token": "GROUP",
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"name": "group_consumer",
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"type": "block",
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"arguments": [
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{
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"name": "group",
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"type": "string"
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},
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{
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"name": "consumer",
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"type": "string"
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}
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]
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},
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{
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"token": "COUNT",
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"name": "count",
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"type": "integer",
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"optional": true
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},
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{
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"token": "BLOCK",
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"name": "milliseconds",
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"type": "integer",
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"optional": true
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},
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{
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"name": "noack",
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"token": "NOACK",
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"type": "pure-token",
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"optional": true
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},
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{
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"name": "streams",
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"token": "STREAMS",
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"type": "block",
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"arguments": [
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{
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"name": "key",
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"type": "key",
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"key_spec_index": 0,
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"multiple": true
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},
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{
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"name": "ID",
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"type": "string",
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"multiple": true
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}
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]
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}
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]
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}
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}
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