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RequestTracker¶
tracker~RequestTracker
Tracks request execution for a Client.
A RequestTracker can be configured in the client options. The Client will execute
RequestTracker#onSuccess or RequestTracker#onError for every query or batch
executed (QUERY, EXECUTE and BATCH requests).
Methods¶
onError(host, query, parameters, executionOptions, requestLength, err, latency)
Invoked each time a query or batch request fails.
Parameters:
| Name | Type | Description |
|---|---|---|
host |
Host | The node that acted as coordinator of the request. |
query |
String | Array<any> | In the case of prepared or unprepared query executions, the provided query string. For batch requests, an Array containing the queries and parameters provided. |
parameters |
Array<any> | Object | null | In the case of prepared or unprepared query executions, the provided parameters. |
executionOptions |
ExecutionOptions | The information related to the execution of the request. |
requestLength |
Number | Length of the body of the request. When the failure occurred before the request was
written to the wire, the length will be |
err |
Error | The error that caused that caused the request to fail. |
latency |
Array<Number> | An array containing [seconds, nanoseconds] tuple, where nanoseconds is the
remaining part of the real time that can't be represented in second precision (see |
onSuccess(host, query, parameters, executionOptions, requestLength, responseLength, latency)
Invoked each time a query or batch request succeeds.
Parameters:
| Name | Type | Description |
|---|---|---|
host |
Host | The node that acted as coordinator of the request. |
query |
String | Array<any> | In the case of prepared or unprepared query executions, the provided query string. For batch requests, an Array containing the queries and parameters provided. |
parameters |
Array<any> | Object | null | In the case of prepared or unprepared query executions, the provided parameters. |
executionOptions |
ExecutionOptions | The information related to the execution of the request. |
requestLength |
Number | Length of the body of the request. |
responseLength |
Number | Length of the body of the response. |
latency |
Array<Number> | An array containing [seconds, nanoseconds] tuple, where nanoseconds is the
remaining part of the real time that can't be represented in second precision (see |
shutdown()
Invoked when the Client is being shutdown.