97 lines
2.5 KiB
TypeScript
97 lines
2.5 KiB
TypeScript
export type Environment = "local" | "test" | "staging" | "production";
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// interfaces
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import { Client as ElasticClient } from "elasticsearch";
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// other classes
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import { LogScheduler } from "./elasticlog.classes.logscheduler";
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export interface LogContext {
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zone?: string;
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containerName?: string;
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environment: Environment;
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}
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export type TLogSeverity = "log" | "info" | "warn" | "error" | "fatal";
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export interface IStandardLogParams {
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message: string;
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severity: string;
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}
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export interface IElasticLogConstructorOptions {
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port: number;
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domain: string;
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ssl: boolean;
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user?: string;
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pass?: string;
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logContext: LogContext;
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}
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export class ElasticLog<T> {
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client: ElasticClient;
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logContext: LogContext;
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logScheduler = new LogScheduler(this);
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/**
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* sets up an instance of Elastic log
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* @param optionsArg
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*/
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constructor(optionsArg: IElasticLogConstructorOptions) {
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this.logContext = optionsArg.logContext;
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this.client = new ElasticClient({
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host: this.computeHostString(optionsArg),
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log: "trace"
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});
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}
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/**
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* computes the host string from the constructor options
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* @param optionsArg
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*/
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private computeHostString(optionsArg: IElasticLogConstructorOptions): string {
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let hostString = `${optionsArg.domain}:${optionsArg.port}`;
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if (optionsArg.user && optionsArg.pass) {
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hostString = `${optionsArg.user}:${optionsArg.pass}@${hostString}`;
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}
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if (optionsArg.ssl) {
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hostString = `https://${hostString}`;
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} else {
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hostString = `http://${hostString}`;
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}
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return hostString;
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}
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async log(logObject: IStandardLogParams, scheduleOverwrite = false) {
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const now = new Date();
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if (this.logScheduler.logsScheduled && !scheduleOverwrite) {
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this.logScheduler.scheduleLog(logObject);
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return;
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}
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this.client.index(
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{
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index: `logs-${now.getFullYear()}.${("0" + (now.getMonth() + 1)).slice(
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-2
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)}.${now.getDate()}`,
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type: "log",
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body: {
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"@timestamp": now.toISOString(),
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container: this.logContext.containerName,
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environment: this.logContext.environment,
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severity: logObject.severity,
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message: logObject.message
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}
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},
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(error, response) => {
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if (error) {
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console.log("ElasticLog encountered an error:");
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console.log(error);
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this.logScheduler.addFailedLog(logObject);
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} else {
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console.log(`ElasticLog: ${logObject.message}`);
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}
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}
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);
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}
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}
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