cdk-monitoring-constructs/lib/monitoring/aws-cloudwatch/LogMonitoring.js

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"use strict";
var _a;
Object.defineProperty(exports, "__esModule", { value: true });
exports.LogMonitoring = void 0;
const JSII_RTTI_SYMBOL_1 = Symbol.for("jsii.rtti");
const aws_cloudwatch_1 = require("aws-cdk-lib/aws-cloudwatch");
const common_1 = require("../../common");
const dashboard_1 = require("../../dashboard");
const DefaultLimit = 10;
/**
 * Monitors a CloudWatch log group for various patterns.
 */
class LogMonitoring extends common_1.Monitoring {
    constructor(scope, props) {
        super(scope);
        this.pattern = props.pattern;
        this.title = props.title;
        this.limit = props.limit ?? DefaultLimit;
        this.logGroupName = props.logGroupName;
        this.logGroupUrl = scope
            .createAwsConsoleUrlFactory()
            .getCloudWatchLogGroupUrl(props.logGroupName);
    }
    widgets() {
        return [
            new dashboard_1.MonitoringHeaderWidget({
                family: "Log Group",
                title: this.logGroupName,
                goToLinkUrl: this.logGroupUrl,
            }),
            // Log Query Results
            new aws_cloudwatch_1.LogQueryWidget({
                logGroupNames: [this.logGroupName],
                height: this.resolveRecommendedHeight(this.limit),
                width: common_1.FullWidth,
                title: this.title ?? `Find ${this.pattern} (limit = ${this.limit})`,
                /**
                 * https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/CWL_QuerySyntax.html
                 */
                queryLines: [
                    "fields @timestamp, @logStream, @message",
                    `filter @message like /${this.pattern}/`,
                    "sort @timestamp desc",
                    `limit ${this.limit}`,
                ],
            }),
        ];
    }
    resolveRecommendedHeight(numRows) {
        const heightPerLine = 1;
        const recommendedHeight = heightPerLine * numRows;
        return Math.max(recommendedHeight, common_1.DefaultLogWidgetHeight);
    }
}
exports.LogMonitoring = LogMonitoring;
_a = JSII_RTTI_SYMBOL_1;
LogMonitoring[_a] = { fqn: "cdk-monitoring-constructs.LogMonitoring", version: "1.21.0" };
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VpZ2h0UGVyTGluZSA9IDE7XG4gICAgY29uc3QgcmVjb21tZW5kZWRIZWlnaHQgPSBoZWlnaHRQZXJMaW5lICogbnVtUm93cztcbiAgICByZXR1cm4gTWF0aC5tYXgocmVjb21tZW5kZWRIZWlnaHQsIERlZmF1bHRMb2dXaWRnZXRIZWlnaHQpO1xuICB9XG59XG4iXX0=