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chore(log): rework std/log to work without deprecated Deno.Writer #4021

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merged 4 commits into from
Dec 28, 2023
Merged

chore(log): rework std/log to work without deprecated Deno.Writer #4021

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d47fbee
chore(log): rework std/log to no longer depend on the deprecated Writer
syhol Dec 24, 2023
b02a831
handle unwritten buffer data and tidy bits
syhol Dec 24, 2023
760dbe5
Update log/handlers.ts
syhol Dec 28, 2023
e946bc6
make resetBuffer private
syhol Dec 28, 2023
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34 changes: 21 additions & 13 deletions log/handlers.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -3,10 +3,9 @@ import { getLevelByName, LevelName, LogLevels } from "./levels.ts";
import type { LogRecord } from "./logger.ts";
import { blue, bold, red, yellow } from "../fmt/colors.ts";
import { existsSync } from "../fs/exists.ts";
import { BufWriterSync } from "../io/buf_writer.ts";
import type { Writer } from "../io/types.d.ts";

const DEFAULT_FORMATTER = "{levelName} {msg}";
const PAGE_SIZE = 4096;
export type FormatterFunction = (logRecord: LogRecord) => string;
export type LogMode = "a" | "w" | "x";

Expand Down Expand Up @@ -108,7 +107,6 @@ export class ConsoleHandler extends BaseHandler {
}

export abstract class WriterHandler extends BaseHandler {
protected _writer!: Writer;
#encoder = new TextEncoder();

abstract override log(msg: string): void;
Expand Down Expand Up @@ -139,7 +137,8 @@ interface FileHandlerOptions extends HandlerOptions {
*/
export class FileHandler extends WriterHandler {
protected _file: Deno.FsFile | undefined;
protected _buf!: BufWriterSync;
protected _buf: Uint8Array = new Uint8Array(PAGE_SIZE);
protected _pointer = 0;
protected _filename: string;
protected _mode: LogMode;
protected _openOptions: Deno.OpenOptions;
Expand All @@ -164,8 +163,7 @@ export class FileHandler extends WriterHandler {

override setup() {
this._file = Deno.openSync(this._filename, this._openOptions);
this._writer = this._file;
this._buf = new BufWriterSync(this._file);
this.#resetBuffer();

addEventListener("unload", this.#unloadCallback);
}
Expand All @@ -180,18 +178,30 @@ export class FileHandler extends WriterHandler {
}

log(msg: string) {
if (this._encoder.encode(msg).byteLength + 1 > this._buf.available()) {
const bytes = this._encoder.encode(msg + "\n");
if (bytes.byteLength > this._buf.byteLength - this._pointer) {
this.flush();
}
this._buf.writeSync(this._encoder.encode(msg + "\n"));
this._buf.set(bytes, this._pointer);
this._pointer += bytes.byteLength;
}

flush() {
if (this._buf?.buffered() > 0) {
this._buf.flush();
if (this._pointer > 0 && this._file) {
let written = 0;
while (written < this._pointer) {
written += this._file.writeSync(
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this._buf.subarray(written, this._pointer),
);
}
this.#resetBuffer();
}
}

#resetBuffer() {
this._pointer = 0;
}

override destroy() {
this.flush();
this._file?.close();
Expand Down Expand Up @@ -306,7 +316,7 @@ export class RotatingFileHandler extends FileHandler {
}

rotateLogFiles() {
this._buf.flush();
this.flush();
this._file!.close();

for (let i = this.#maxBackupCount - 1; i >= 0; i--) {
Expand All @@ -319,7 +329,5 @@ export class RotatingFileHandler extends FileHandler {
}

this._file = Deno.openSync(this._filename, this._openOptions);
this._writer = this._file;
this._buf = new BufWriterSync(this._file);
}
}