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95 lines
2.6 KiB
JavaScript
95 lines
2.6 KiB
JavaScript
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/*
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Copyright 2020 Bruno Windels <bruno@windels.cloud>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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export class LogItem {
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constructor(label, parent, logLevel, clock) {
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this._clock = clock;
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this._start = clock.now();
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this._end = null;
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this._values = {label};
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this._parent = parent;
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this._error = null;
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this._children = [];
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this._logLevel = logLevel;
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}
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// should this handle errors in the same way as logger.descend/start?
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descend(label, logLevel = this._logLevel) {
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if (this._end !== null) {
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throw new Error("can't descend on finished item");
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}
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const item = new LogItem(label, logLevel);
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this._children.push(item);
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return item;
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}
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set(key, value) {
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if(typeof key === "object") {
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const values = key;
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Object.assign(this._values, values);
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} else {
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this._values[key] = value;
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}
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}
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// XXX: where will this be called? from wrapAsync?
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finish() {
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if (this._end === null) {
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for(const c of this._children) {
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c.finish();
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}
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this._end = this._clock.now();
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if (this._parent) {
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this._parent._closeChild(this);
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}
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}
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}
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catch(err) {
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this._error = err;
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console.error(`log item ${this.values.label} failed: ${err.message}:\n${err.stack}`);
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}
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serialize() {
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let error;
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if (this._error) {
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error = {
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message: this._error.message,
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stack: this._error.stack,
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};
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}
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return {
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start: this._start,
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end: this._end,
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values: this._values,
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error,
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children: this._children.map(c => c.serialize()),
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logLevel: this._logLevel
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};
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}
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async wrapAsync(fn) {
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try {
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const ret = await fn(this);
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this.finish();
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return ret;
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} catch (err) {
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this.fail(err);
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throw err;
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}
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}
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}
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