Langkah 4: Verifikasi Output Aplikasi - Panduan Pengembang Amazon Kinesis Data Analytics SQL untuk Aplikasi

Setelah mempertimbangkan dengan cermat, kami memutuskan untuk menghentikan Amazon Kinesis Data Analytics SQL untuk aplikasi dalam dua langkah:

1. Mulai 15 Oktober 2025, Anda tidak akan dapat membuat Kinesis Data Analytics SQL baru untuk aplikasi.

2. Kami akan menghapus aplikasi Anda mulai 27 Januari 2026. Anda tidak akan dapat memulai atau mengoperasikan Amazon Kinesis Data Analytics Anda SQL untuk aplikasi. Support tidak akan lagi tersedia untuk Amazon Kinesis Data Analytics SQL sejak saat itu. Untuk informasi selengkapnya, lihat Amazon Kinesis Data Analytics SQL untuk penghentian Aplikasi.

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

Langkah 4: Verifikasi Output Aplikasi

Dalam bagian Contoh hotspot ini , Anda mengatur aplikasi web yang menampilkan informasi hotspot di kontrol Scalable Vector Graphics (SVG).

  1. Buat file bernama index.html dengan konten berikut:

    <!doctype html>
<html lang=en>
<head>
    <meta charset=utf-8>
    <title>hotspots viewer</title>

    <style>
    #visualization {
      display: block;
      margin: auto;
    }

    .point {
      opacity: 0.2;
    }

    .hot {
      fill: red;
    }

    .cold {
      fill: blue;
    }

    .hotspot {
      stroke: black;
      stroke-opacity: 0.8;
      stroke-width: 1;
      fill: none;
    }
    </style>
    <script src="https://sdk.amazonaws.com/js/aws-sdk-2.202.0.min.js"></script>
    <script src="https://d3js.org/d3.v4.min.js"></script>
</head>
<body>
<svg id="visualization" width="600" height="600"></svg>
<script src="hotspots_viewer.js"></script>
</body>
</html>

  2. Buat file teks di direktori yang sama bernama hotspots_viewer.js dengan konten berikut. Berikan Anda, kredensial, dan nama aliran output dalam variabel yang disediakan.

    // Visualize example output from the Kinesis Analytics hotspot detection algorithm.
// This script assumes that the output stream has a single shard.

// Modify this section to reflect your AWS configuration
var awsRegion = "",        // The  where your Kinesis Analytics application is configured.
    accessKeyId = "",      // Your Access Key ID
    secretAccessKey = "",  // Your Secret Access Key
    outputStream = "";     // The name of the Kinesis Stream where the output from the HOTSPOTS function is being written

// The variables in this section should reflect way input data was generated and the parameters that the HOTSPOTS
// function was called with.
var windowSize = 1000, // The window size used for hotspot detection
    minimumDensity = 40,  // A filter applied to returned hotspots before visualization
    xRange = [0, 10],  // The range of values to display on the x-axis
    yRange = [0, 10];  // The range of values to display on the y-axis

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// D3 setup
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

var svg = d3.select("svg"),
    margin = {"top": 20, "right": 20, "bottom": 20, "left": 20},
    graphWidth = +svg.attr("width") - margin.left - margin.right,
    graphHeight = +svg.attr("height") - margin.top - margin.bottom;

// Return the linear function that maps the segment [a, b] to the segment [c, d].
function linearScale(a, b, c, d) {
    var m = (d - c) / (b - a);
    return function(x) {
        return c + m * (x - a);
    };
}

// helper functions to extract the x-value from a stream record and scale it for output
var xValue = function(r) { return r.x; },
    xScale = linearScale(xRange[0], xRange[1], 0, graphWidth),
    xMap = function(r) { return xScale(xValue(r)); };

// helper functions to extract the y-value from a stream record and scale it for output
var yValue = function(r) { return r.y; },
    yScale = linearScale(yRange[0], yRange[1], 0, graphHeight),
    yMap = function(r) { return yScale(yValue(r)); };

// a helper function that assigns a CSS class to a point based on whether it was generated as part of a hotspot
var classMap = function(r) { return r.is_hot == "Y" ? "point hot" : "point cold"; };

var g = svg.append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

function update(records, hotspots) {

    var points = g.selectAll("circle")
        .data(records, function(r) { return r.dataIndex; });

    points.enter().append("circle")
        .attr("class", classMap)
        .attr("r", 3)
        .attr("cx", xMap)
        .attr("cy", yMap);

    points.exit().remove();

    if (hotspots) {
        var boxes = g.selectAll("rect").data(hotspots);

        boxes.enter().append("rect")
            .merge(boxes)
            .attr("class", "hotspot")
            .attr("x", function(h) { return xScale(h.minValues[0]); })
            .attr("y", function(h) { return yScale(h.minValues[1]); })
            .attr("width", function(h) { return xScale(h.maxValues[0]) - xScale(h.minValues[0]); })
            .attr("height", function(h) { return yScale(h.maxValues[1]) - yScale(h.minValues[1]); });

        boxes.exit().remove();
    }
}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Use the AWS SDK to pull output records from Kinesis and update the visualization
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

var kinesis = new AWS.Kinesis({
    "region": awsRegion,
    "accessKeyId": accessKeyId,
    "secretAccessKey": secretAccessKey
});

var textDecoder = new TextDecoder("utf-8");

// Decode an output record into an object and assign it an index value
function decodeRecord(record, recordIndex) {
    var record = JSON.parse(textDecoder.decode(record.Data));
    var hotspots_result = JSON.parse(record.HOTSPOTS_RESULT);
    record.hotspots = hotspots_result.hotspots
        .filter(function(hotspot) { return hotspot.density >= minimumDensity});
    record.index = recordIndex
    return record;
}

// Fetch a new records from the shard iterator, append them to records, and update the visualization
function getRecordsAndUpdateVisualization(shardIterator, records, lastRecordIndex) {
    kinesis.getRecords({
        "ShardIterator": shardIterator
    }, function(err, data) {
        if (err) {
            console.log(err, err.stack);
            return;
        }

        var newRecords = data.Records.map(function(raw) { return decodeRecord(raw, ++lastRecordIndex); });
        newRecords.forEach(function(record) { records.push(record); });

        var hotspots = null;
        if (newRecords.length > 0) {
            hotspots = newRecords[newRecords.length - 1].hotspots;
        }

        while (records.length > windowSize) {
            records.shift();
        }

        update(records, hotspots);

        getRecordsAndUpdateVisualization(data.NextShardIterator, records, lastRecordIndex);
    });
}

// Get a shard iterator for the output stream and begin updating the visualization. Note that this script will only
// read records from the first shard in the stream.
function init() {
    kinesis.describeStream({
        "StreamName": outputStream
    }, function(err, data) {
        if (err) {
            console.log(err, err.stack);
            return;
        }

        var shardId = data.StreamDescription.Shards[0].ShardId;

        kinesis.getShardIterator({
            "StreamName": outputStream,
            "ShardId": shardId,
            "ShardIteratorType": "LATEST"
        }, function(err, data) {
            if (err) {
                console.log(err, err.stack);
                return;
            }
            getRecordsAndUpdateVisualization(data.ShardIterator, [], 0);
        })
    });
}

// Start the visualization
init();

  3. Dengan kode Python dari bagian pertama yang berjalan, buka index.html di peramban web. Informasi hotspot muncul di halaman, seperti yang ditunjukkan berikut ini.

    Diagram Scalable Vector Graphics menampilkan informasi hotspot.