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Viewing file:     NoopTracer.js (2.7 KB)      -rw-r--r--

/*
 * Copyright The OpenTelemetry Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { ContextAPI } from '../api/context';
import { getSpanContext, setSpan } from '../trace/context-utils';
import { NonRecordingSpan } from './NonRecordingSpan';
import { isSpanContextValid } from './spancontext-utils';
var contextApi = ContextAPI.getInstance();
/**
 * No-op implementations of {@link Tracer}.
 */
var NoopTracer = /** @class */ (function () {
    function NoopTracer() {
    }
    // startSpan starts a noop span.
    NoopTracer.prototype.startSpan = function (name, options, context) {
        if (context === void 0) { context = contextApi.active(); }
        var root = Boolean(options === null || options === void 0 ? void 0 : options.root);
        if (root) {
            return new NonRecordingSpan();
        }
        var parentFromContext = context && getSpanContext(context);
        if (isSpanContext(parentFromContext) &&
            isSpanContextValid(parentFromContext)) {
            return new NonRecordingSpan(parentFromContext);
        }
        else {
            return new NonRecordingSpan();
        }
    };
    NoopTracer.prototype.startActiveSpan = function (name, arg2, arg3, arg4) {
        var opts;
        var ctx;
        var fn;
        if (arguments.length < 2) {
            return;
        }
        else if (arguments.length === 2) {
            fn = arg2;
        }
        else if (arguments.length === 3) {
            opts = arg2;
            fn = arg3;
        }
        else {
            opts = arg2;
            ctx = arg3;
            fn = arg4;
        }
        var parentContext = ctx !== null && ctx !== void 0 ? ctx : contextApi.active();
        var span = this.startSpan(name, opts, parentContext);
        var contextWithSpanSet = setSpan(parentContext, span);
        return contextApi.with(contextWithSpanSet, fn, undefined, span);
    };
    return NoopTracer;
}());
export { NoopTracer };
function isSpanContext(spanContext) {
    return (typeof spanContext === 'object' &&
        typeof spanContext['spanId'] === 'string' &&
        typeof spanContext['traceId'] === 'string' &&
        typeof spanContext['traceFlags'] === 'number');
}
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