Marc Mintel
5397309103
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* Copyright The OpenTelemetry Authors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * https://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport * as api from '@opentelemetry/api';\nimport { EventEmitter } from 'events';\nimport {\n InstrumentationBase,\n InstrumentationNodeModuleDefinition,\n isWrapped,\n SemconvStability,\n semconvStabilityFromStr,\n} from '@opentelemetry/instrumentation';\nimport {\n ATTR_DB_COLLECTION_NAME,\n ATTR_DB_NAMESPACE,\n ATTR_DB_QUERY_TEXT,\n ATTR_DB_SYSTEM_NAME,\n ATTR_SERVER_ADDRESS,\n ATTR_SERVER_PORT,\n DB_SYSTEM_NAME_VALUE_MICROSOFT_SQL_SERVER,\n} from '@opentelemetry/semantic-conventions';\nimport {\n DB_SYSTEM_VALUE_MSSQL,\n ATTR_DB_NAME,\n ATTR_DB_SQL_TABLE,\n ATTR_DB_STATEMENT,\n ATTR_DB_SYSTEM,\n ATTR_DB_USER,\n ATTR_NET_PEER_NAME,\n ATTR_NET_PEER_PORT,\n} from './semconv';\nimport type * as tedious from 'tedious';\nimport { TediousInstrumentationConfig } from './types';\nimport { getSpanName, once } from './utils';\n/** @knipignore */\nimport { PACKAGE_NAME, PACKAGE_VERSION } from './version';\n\nconst CURRENT_DATABASE = Symbol(\n 'opentelemetry.instrumentation-tedious.current-database'\n);\n\nexport const INJECTED_CTX = Symbol(\n 'opentelemetry.instrumentation-tedious.context-info-injected'\n);\n\nconst PATCHED_METHODS = [\n 'callProcedure',\n 'execSql',\n 'execSqlBatch',\n 'execBulkLoad',\n 'prepare',\n 'execute',\n];\n\ntype UnknownFunction = (...args: any[]) => any;\ntype ApproxConnection = EventEmitter & {\n [CURRENT_DATABASE]: string;\n config: any;\n};\ntype ApproxRequest = EventEmitter & {\n sqlTextOrProcedure: string | undefined;\n callback: any;\n table: string | undefined;\n parametersByName: any;\n};\n\nfunction setDatabase(this: ApproxConnection, databaseName: string) {\n Object.defineProperty(this, CURRENT_DATABASE, {\n value: databaseName,\n writable: true,\n });\n}\n\nexport class TediousInstrumentation extends InstrumentationBase<TediousInstrumentationConfig> {\n static readonly COMPONENT = 'tedious';\n private _netSemconvStability!: SemconvStability;\n private _dbSemconvStability!: SemconvStability;\n\n constructor(config: TediousInstrumentationConfig = {}) {\n super(PACKAGE_NAME, PACKAGE_VERSION, config);\n this._setSemconvStabilityFromEnv();\n }\n\n // Used for testing.\n private _setSemconvStabilityFromEnv() {\n this._netSemconvStability = semconvStabilityFromStr(\n 'http',\n process.env.OTEL_SEMCONV_STABILITY_OPT_IN\n );\n this._dbSemconvStability = semconvStabilityFromStr(\n 'database',\n process.env.OTEL_SEMCONV_STABILITY_OPT_IN\n );\n }\n\n protected init() {\n return [\n new InstrumentationNodeModuleDefinition(\n TediousInstrumentation.COMPONENT,\n ['>=1.11.0 <20'],\n (moduleExports: typeof tedious) => {\n const ConnectionPrototype: any = moduleExports.Connection.prototype;\n for (const method of PATCHED_METHODS) {\n if (isWrapped(ConnectionPrototype[method])) {\n this._unwrap(ConnectionPrototype, method);\n }\n this._wrap(\n ConnectionPrototype,\n method,\n this._patchQuery(method, moduleExports) as any\n );\n }\n\n if (isWrapped(ConnectionPrototype.connect)) {\n this._unwrap(ConnectionPrototype, 'connect');\n }\n this._wrap(ConnectionPrototype, 'connect', this._patchConnect);\n\n return moduleExports;\n },\n (moduleExports: typeof tedious) => {\n if (moduleExports === undefined) return;\n const ConnectionPrototype: any = moduleExports.Connection.prototype;\n for (const method of PATCHED_METHODS) {\n this._unwrap(ConnectionPrototype, method);\n }\n this._unwrap(ConnectionPrototype, 'connect');\n }\n ),\n ];\n }\n\n private _patchConnect(original: UnknownFunction): UnknownFunction {\n return function patchedConnect(this: ApproxConnection) {\n setDatabase.call(this, this.config?.options?.database);\n\n // remove the listener first in case it's already added\n this.removeListener('databaseChange', setDatabase);\n this.on('databaseChange', setDatabase);\n\n this.once('end', () => {\n this.removeListener('databaseChange', setDatabase);\n });\n return original.apply(this, arguments as unknown as any[]);\n };\n }\n\n private _buildTraceparent(span: api.Span): string {\n const sc = span.spanContext();\n return `00-${sc.traceId}-${sc.spanId}-0${Number(sc.traceFlags || api.TraceFlags.NONE).toString(16)}`;\n }\n\n /**\n * Fire a one-off `SET CONTEXT_INFO @opentelemetry_traceparent` on the same\n * connection. Marks the request with INJECTED_CTX so our patch skips it.\n */\n private _injectContextInfo(\n connection: any,\n tediousModule: typeof tedious,\n traceparent: string\n ): Promise<void> {\n return new Promise(resolve => {\n try {\n const sql = 'set context_info @opentelemetry_traceparent';\n const req = new tediousModule.Request(sql, (_err: any) => {\n resolve();\n });\n Object.defineProperty(req, INJECTED_CTX, { value: true });\n const buf = Buffer.from(traceparent, 'utf8');\n req.addParameter(\n 'opentelemetry_traceparent',\n (tediousModule as any).TYPES.VarBinary,\n buf,\n { length: buf.length }\n );\n\n connection.execSql(req);\n } catch {\n resolve();\n }\n });\n }\n\n private _shouldInjectFor(operation: string): boolean {\n return (\n operation === 'execSql' ||\n operation === 'execSqlBatch' ||\n operation === 'callProcedure' ||\n operation === 'execute'\n );\n }\n\n private _patchQuery(operation: string, tediousModule: typeof tedious) {\n return (originalMethod: UnknownFunction): UnknownFunction => {\n const thisPlugin = this;\n\n function patchedMethod(this: ApproxConnection, request: ApproxRequest) {\n // Skip our own injected request\n if ((request as any)?.[INJECTED_CTX]) {\n return originalMethod.apply(this, arguments as unknown as any[]);\n }\n\n if (!(request instanceof EventEmitter)) {\n thisPlugin._diag.warn(\n `Unexpected invocation of patched ${operation} method. Span not recorded`\n );\n return originalMethod.apply(this, arguments as unknown as any[]);\n }\n let procCount = 0;\n let statementCount = 0;\n const incrementStatementCount = () => statementCount++;\n const incrementProcCount = () => procCount++;\n const databaseName = this[CURRENT_DATABASE];\n const sql = (request => {\n // Required for <11.0.9\n if (\n request.sqlTextOrProcedure === 'sp_prepare' &&\n request.parametersByName?.stmt?.value\n ) {\n return request.parametersByName.stmt.value;\n }\n return request.sqlTextOrProcedure;\n })(request);\n\n const attributes: api.Attributes = {};\n if (thisPlugin._dbSemconvStability & SemconvStability.OLD) {\n attributes[ATTR_DB_SYSTEM] = DB_SYSTEM_VALUE_MSSQL;\n attributes[ATTR_DB_NAME] = databaseName;\n // >=4 uses `authentication` object; older versions just userName and password pair\n attributes[ATTR_DB_USER] =\n this.config?.userName ??\n this.config?.authentication?.options?.userName;\n attributes[ATTR_DB_STATEMENT] = sql;\n attributes[ATTR_DB_SQL_TABLE] = request.table;\n }\n if (thisPlugin._dbSemconvStability & SemconvStability.STABLE) {\n // The OTel spec for \"db.namespace\" discusses handling for connection\n // to MSSQL \"named instances\". This isn't currently supported.\n // https://opentelemetry.io/docs/specs/semconv/database/sql-server/#:~:text=%5B1%5D%20db%2Enamespace\n attributes[ATTR_DB_NAMESPACE] = databaseName;\n attributes[ATTR_DB_SYSTEM_NAME] =\n DB_SYSTEM_NAME_VALUE_MICROSOFT_SQL_SERVER;\n attributes[ATTR_DB_QUERY_TEXT] = sql;\n attributes[ATTR_DB_COLLECTION_NAME] = request.table;\n // See https://opentelemetry.io/docs/specs/semconv/database/sql-server/#spans\n // TODO(3290): can `db.response.status_code` be added?\n // TODO(3290): is `operation` correct for `db.operation.name`\n // TODO(3290): can `db.query.summary` reliably be calculated?\n // TODO(3290): `db.stored_procedure.name`\n }\n if (thisPlugin._netSemconvStability & SemconvStability.OLD) {\n attributes[ATTR_NET_PEER_NAME] = this.config?.server;\n attributes[ATTR_NET_PEER_PORT] = this.config?.options?.port;\n }\n if (thisPlugin._netSemconvStability & SemconvStability.STABLE) {\n attributes[ATTR_SERVER_ADDRESS] = this.config?.server;\n attributes[ATTR_SERVER_PORT] = this.config?.options?.port;\n }\n const span = thisPlugin.tracer.startSpan(\n getSpanName(operation, databaseName, sql, request.table),\n {\n kind: api.SpanKind.CLIENT,\n attributes,\n }\n );\n\n const endSpan = once((err?: any) => {\n request.removeListener('done', incrementStatementCount);\n request.removeListener('doneInProc', incrementStatementCount);\n request.removeListener('doneProc', incrementProcCount);\n request.removeListener('error', endSpan);\n this.removeListener('end', endSpan);\n\n span.setAttribute('tedious.procedure_count', procCount);\n span.setAttribute('tedious.statement_count', statementCount);\n if (err) {\n span.setStatus({\n code: api.SpanStatusCode.ERROR,\n message: err.message,\n });\n // TODO(3290): set `error.type` attribute?\n }\n span.end();\n });\n\n request.on('done', incrementStatementCount);\n request.on('doneInProc', incrementStatementCount);\n request.on('doneProc', incrementProcCount);\n request.once('error', endSpan);\n this.on('end', endSpan);\n\n if (typeof request.callback === 'function') {\n thisPlugin._wrap(\n request,\n 'callback',\n thisPlugin._patchCallbackQuery(endSpan)\n );\n } else {\n thisPlugin._diag.error('Expected request.callback to be a function');\n }\n\n const runUserRequest = () => {\n return api.context.with(\n api.trace.setSpan(api.context.active(), span),\n originalMethod,\n this,\n ...arguments\n );\n };\n\n const cfg = thisPlugin.getConfig();\n const shouldInject =\n cfg.enableTraceContextPropagation &&\n thisPlugin._shouldInjectFor(operation);\n\n if (!shouldInject) return runUserRequest();\n\n const traceparent = thisPlugin._buildTraceparent(span);\n\n void thisPlugin\n ._injectContextInfo(this, tediousModule, traceparent)\n .finally(runUserRequest);\n }\n\n Object.defineProperty(patchedMethod, 'length', {\n value: originalMethod.length,\n writable: false,\n });\n\n return patchedMethod;\n };\n }\n\n private _patchCallbackQuery(endSpan: Function) {\n return (originalCallback: Function) => {\n return function (\n this: any,\n err: Error | undefined | null,\n rowCount?: number,\n rows?: any\n ) {\n endSpan(err);\n return originalCallback.apply(this, arguments);\n };\n };\n }\n}\n"]} |