Terjemahan disediakan oleh mesin penerjemah. Jika konten terjemahan yang diberikan bertentangan dengan versi bahasa Inggris aslinya, utamakan versi bahasa Inggris.

Contoh Streams Neptune

Contoh berikut menunjukkan cara mengakses data streams perubahan-log di Amazon Neptune.

AT_SEQUENCE_NUMBER Ubah Log

Contoh berikut menunjukkan log perubahan Gremlin atau OpenCypherAT_SEQUENCE_NUMBER.

curl -s "https://Neptune-DNS:8182/propertygraph/stream?limit=1&commitNum=1&opNum=1&iteratorType=AT_SEQUENCE_NUMBER" |jq
{
  "lastEventId": {
    "commitNum": 1,
    "opNum": 1
  },
  "lastTrxTimestamp": 1560011610678,
  "format": "PG_JSON",
  "records": [
    {
      "eventId": {
        "commitNum": 1,
        "opNum": 1
      },
      "commitTimestamp": 1560011610678,
      "data": {
        "id": "d2b59bf8-0d0f-218b-f68b-2aa7b0b1904a",
        "type": "vl",
        "key": "label",
        "value": {
          "value": "vertex",
          "dataType": "String"
        }
      },
      "op": "ADD",
      "isLastOp": true
    }
  ],
  "totalRecords": 1
}

Yang ini menunjukkan contoh SPARQL dari log AT_SEQUENCE_NUMBER perubahan.

curl -s "https://localhost:8182/sparql/stream?limit=1&commitNum=1&opNum=1&iteratorType=AT_SEQUENCE_NUMBER" |jq
{
  "lastEventId": {
    "commitNum": 1,
    "opNum": 1
  },
  "lastTrxTimestamp": 1571252030566,
  "format": "NQUADS",
  "records": [
    {
      "eventId": {
        "commitNum": 1,
        "opNum": 1
      },
      "commitTimestamp": 1571252030566,
      "data": {
        "stmt": "<https://test.com/s> <https://test.com/p> <https://test.com/o> .\n"
      },
      "op": "ADD",
      "isLastOp": true
    }
  ],
  "totalRecords": 1
}

AFTER_SEQUENCE_NUMBER Ubah Log

Contoh berikut menunjukkan log perubahan Gremlin atau OpenCypherAFTER_SEQUENCE_NUMBER.

curl -s "https://Neptune-DNS:8182/propertygraph/stream?limit=1&commitNum=1&opNum=1&iteratorType=AFTER_SEQUENCE_NUMBER" |jq
{
  "lastEventId": {
    "commitNum": 2,
    "opNum": 1
  },
  "lastTrxTimestamp": 1560011633768,
  "format": "PG_JSON",
  "records": [
    {
      "commitTimestamp": 1560011633768,
      "eventId": {
        "commitNum": 2,
        "opNum": 1
      },
      "data": {
        "id": "d2b59bf8-0d0f-218b-f68b-2aa7b0b1904a",
        "type": "vl",
        "key": "label",
        "value": {
          "value": "vertex",
          "dataType": "String"
        }
      },
      "op": "REMOVE",
      "isLastOp": true
    }
  ],
  "totalRecords": 1
}

TRIM_HORIZON Perubahan Log

Contoh berikut menunjukkan log perubahan Gremlin atau OpenCypherTRIM_HORIZON.

curl -s "https://Neptune-DNS:8182/propertygraph/stream?limit=1&iteratorType=TRIM_HORIZON" |jq
{
  "lastEventId": {
    "commitNum": 1,
    "opNum": 1
  },
  "lastTrxTimestamp": 1560011610678,
  "format": "PG_JSON",
  "records": [
    {
      "commitTimestamp": 1560011610678,
      "eventId": {
        "commitNum": 1,
        "opNum": 1
      },
      "data": {
        "id": "d2b59bf8-0d0f-218b-f68b-2aa7b0b1904a",
        "type": "vl",
        "key": "label",
        "value": {
          "value": "vertex",
          "dataType": "String"
        }
      },
      "op": "ADD",
      "isLastOp": true
    }
  ],
  "totalRecords": 1
}

Perubahan Log TERBARU

Contoh berikut menunjukkan log perubahan Gremlin atau OpenCypherLATEST. Perhatikan bahwa parameter APIlimit,commitNum, dan opNum sepenuhnya opsional.

curl -s "https://Neptune-DNS:8182/propertygraph/stream?iteratorType=LATEST" | jq
{
  "lastEventId": {
    "commitNum": 21,
    "opNum": 4
  },
  "lastTrxTimestamp": 1634710497743,
  "format": "PG_JSON",
  "records": [
    {
      "commitTimestamp": 1634710497743,
      "eventId": {
        "commitNum": 21,
        "opNum": 4
      },
      "data": {
        "id": "24be4e2b-53b9-b195-56ba-3f48fa2b60ac",
        "type": "e",
        "key": "label",
        "value": {
          "value": "created",
          "dataType": "String"
        },
        "from": "4",
        "to": "5"
      },
      "op": "REMOVE",
      "isLastOp": true
    }
  ],
  "totalRecords": 1
}

Log Perubahan Kompresi

Contoh berikut menunjukkan log perubahan kompresi Gremlin atau OpenCypher.

curl -sH \
  "Accept-Encoding: gzip" \
  "https://Neptune-DNS:8182/propertygraph/stream?limit=1&commitNum=1" \
  -H "Accept-Encoding: gzip" \
  -v |gunzip -|jq
> GET /propertygraph/stream?limit=1 HTTP/1.1
> Host: localhost:8182
> User-Agent: curl/7.64.0
> Accept: /
> Accept-Encoding: gzip
*> Accept-Encoding: gzip*
>
< HTTP/1.1 200 OK
< Content-Type: application/json; charset=UTF-8
< Connection: keep-alive
*< content-encoding: gzip*
< content-length: 191
<
{ [191 bytes data]
Connection #0 to host localhost left intact
{
  "lastEventId": "1:1",
  "lastTrxTimestamp": 1558942160603,
  "format": "PG_JSON",
  "records": [
    {
      "commitTimestamp": 1558942160603,
      "eventId": "1:1",
      "data": {
        "id": "v1",
        "type": "vl",
        "key": "label",
        "value": {
          "value": "person",
          "dataType": "String"
        }
      },
      "op": "ADD",
      "isLastOp": true
    }
  ],
  "totalRecords": 1
}