04-query-test.js

04-query-test.js 程序在 Query 上执行 TryDaxTable 操作。

const AmazonDaxClient = require("amazon-dax-client");
var AWS = require("aws-sdk");

var region = "us-west-2";

AWS.config.update({
  region: region,
});

var ddbClient = new AWS.DynamoDB.DocumentClient();
var daxClient = null;

if (process.argv.length > 2) {
  var dax = new AmazonDaxClient({
    endpoints: [process.argv[2]],
    region: region,
  });
  daxClient = new AWS.DynamoDB.DocumentClient({ service: dax });
}

var client = daxClient != null ? daxClient : ddbClient;
var tableName = "TryDaxTable";

var pk = 5;
var sk1 = 2;
var sk2 = 9;
var iterations = 5;

var params = {
  TableName: tableName,
  KeyConditionExpression: "pk = :pkval and sk between :skval1 and :skval2",
  ExpressionAttributeValues: {
    ":pkval": pk,
    ":skval1": sk1,
    ":skval2": sk2,
  },
};

for (var i = 0; i < iterations; i++) {
  var startTime = new Date().getTime();

  client.query(params, function (err, data) {
    if (err) {
      console.error(
        "Unable to read item. Error JSON:",
        JSON.stringify(err, null, 2)
      );
    } else {
      // Query succeeded
    }
  });

  var endTime = new Date().getTime();
  console.log(
    "\tTotal time: ",
    endTime - startTime,
    "ms - Avg time: ",
    (endTime - startTime) / iterations,
    "ms"
  );
}