Lee con un filtro de rango de marca de tiempo (HBase)
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Crea un filtro de límite en un rango de marcas de tiempo de celdas.
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Para obtener documentación en la que se incluye esta muestra de código, consulta lo siguiente:
Muestra de código
Salvo que se indique lo contrario, el contenido de esta página está sujeto a la licencia Atribución 4.0 de Creative Commons, y los ejemplos de código están sujetos a la licencia Apache 2.0. Para obtener más información, consulta las políticas del sitio de Google Developers. Java es una marca registrada de Oracle o sus afiliados.
[[["Fácil de comprender","easyToUnderstand","thumb-up"],["Resolvió mi problema","solvedMyProblem","thumb-up"],["Otro","otherUp","thumb-up"]],[["Difícil de entender","hardToUnderstand","thumb-down"],["Información o código de muestra incorrectos","incorrectInformationOrSampleCode","thumb-down"],["Faltan la información o los ejemplos que necesito","missingTheInformationSamplesINeed","thumb-down"],["Problema de traducción","translationIssue","thumb-down"],["Otro","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis code snippet demonstrates how to implement a filter to limit the range of cell timestamps within a Bigtable table.\u003c/p\u003e\n"],["\u003cp\u003eThe filter targets cells with timestamps that are one hour old or earlier, effectively excluding newer data from the query results.\u003c/p\u003e\n"],["\u003cp\u003eThe code utilizes the \u003ccode\u003esetTimeRange\u003c/code\u003e method within a \u003ccode\u003eScan\u003c/code\u003e object to specify the desired timestamp window.\u003c/p\u003e\n"],["\u003cp\u003eThis sample uses a \u003ccode\u003etimestamp\u003c/code\u003e variable representing one hour ago, which is determined by calculating one hour before the current time using \u003ccode\u003eInstant.now().minus(1, ChronoUnit.HOURS).toEpochMilli()\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe code shows the use of \u003ccode\u003esetMaxVersions()\u003c/code\u003e to help read all the values within the specified timestamp.\u003c/p\u003e\n"]]],[],null,["Creates a limiting filter on a range of cell timestamps.\n\nExplore further\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Use filters](/bigtable/docs/using-filters)\n\nCode sample \n\nJava\n\n\nTo learn how to install and use the client library for Bigtable, see\n[Bigtable client libraries](/bigtable/docs/reference/libraries).\n\n\nTo authenticate to Bigtable, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n public static void filterLimitTimestampRange() {\n // TODO(developer): Replace these variables before running the sample.\n String projectId = \"my-project-id\";\n String instanceId = \"my-instance-id\";\n String tableId = \"mobile-time-series\";\n filterLimitTimestampRange(projectId, instanceId, tableId);\n }\n\n public static void filterLimitTimestampRange(\n String projectId, String instanceId, String tableId) {\n // A filter that matches cells whose timestamp is from an hour ago or earlier\n // Get a time representing one hour ago\n long timestamp = Instant.now().minus(1, ChronoUnit.HOURS).toEpochMilli();\n try {\n Scan scan = new Scan().setTimeRange(0, timestamp).setMaxVersions();\n readWithFilter(projectId, instanceId, tableId, scan);\n } catch (IOException e) {\n System.out.println(\"There was an issue with your timestamp \\n\" + e.toString());\n }\n }\n\nWhat's next\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=bigtable)."]]
