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handlers](https://github.com/openwhisk/openwhisk/blob/master/docs/actions.md) and the [openwhisk\nclient library](https://github.com/openwhisk/openwhisk-client-js).\n\n## install\n\n```\nnpm install zipkin-instrumentation-openwhisk \n```\n\nUsing NPM modules on OpenWhisk requires the user to install them locally and\ninclude this `node_modules` directory in the deployment archive.\n\nSee [here](http://jamesthom.as/blog/2016/11/28/npm-modules-in-openwhisk/) for more details.\n\nBoth the base `zipkin` module and a transport module (e.g. `zipkin-transport-http`\n) must be included within this package.\n\n## usage - serverless functions \n\nThe instrumentation wraps the handler functions to record zipkin trace events\nfor each invocation. Parent trace identifiers should be passed in using the\n`_zipkin` invocation property. These values are automatically added if you are\nwrapping the client library, see below.\n\n```\nconst {Tracer, ExplicitContext, BatchRecorder} = require('zipkin');\nconst {HttpLogger} = require('zipkin-transport-http');\nconst wrap = require('zipkin-instrumentation-openwhisk');\n\nconst ctxImpl = new ExplicitContext()\n\nconst recorder = new BatchRecorder({\n  logger: new HttpLogger({\n    endpoint: 'http://your_trace_server_ip:9411/api/v1/spans'\n  })\n});\n\nconst tracer = new Tracer({ctxImpl, recorder});\nconst serviceName = 'greeting-service';\n\nconst handler = function (params) {\n  const name = params.name || 'stranger';\n\n  return {message: `Hello, ${name}!`};\n}\n\nexports.handler = wrap(handler, {tracer, serviceName});\n```\n\n## usage - client library\n\nThe library will also wrap the OpenWhisk client library, allowing you to trace\nHTTP calls to the platform.\n\nWhen the library is used to invoke other serverless functions, the parent trace\nidentifiers are automatically added to the request.\n\n```\nconst {Tracer, ExplicitContext, BatchRecorder} = require('zipkin');\nconst {HttpLogger} = require('zipkin-transport-http');\nconst wrap = require('zipkin-instrumentation-openwhisk');\n\nconst ctxImpl = new ExplicitContext()\n\nconst recorder = new BatchRecorder({\n  logger: new HttpLogger({\n    endpoint: 'http://your_trace_server_ip:9411/api/v1/spans'\n  })\n});\n\nconst tracer = new Tracer({ctxImpl, recorder});\nconst serviceName = 'greeting-service';\n\nconst openwhisk = require('openwhisk')\nconst ow = wrap(openwhisk(), { tracer, serviceName });\n\now.actions.invoke({actionName: 'myServerlessFn'}).then(result =\u003e ...)\n```\n\n## testing \n\nUsing the `ConsoleRecorder` module will log traces to the console, rather than\nthe Zipkin server. This can help to understand what is being sent to the server.\n\n```\nconst {Tracer, ExplicitContext, BatchRecorder, ConsoleRecorder} = require('zipkin')\n\nconst ctxImpl = new ExplicitContext()\nconst recorder = new ConsoleRecorder()\n\nconst tracer = new Tracer({ctxImpl, recorder})\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fjthomas%2Fzipkin-instrumentation-openwhisk","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fjthomas%2Fzipkin-instrumentation-openwhisk","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fjthomas%2Fzipkin-instrumentation-openwhisk/lists"}