Paso 1: Crear un nuevo libro mayor de nuevo - Amazon Quantum Ledger Database (Amazon QLDB)

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Paso 1: Crear un nuevo libro mayor de nuevo

En este paso, se crea un nuevo libro mayor de Amazon QLDB denominadovehicle-registration.

Para crear un nuevo libro mayor de nuevo

  1. Revise el archivo siguiente (Constants.java), que contiene valores constantes que utilizan todos los demás programas de este tutorial.

    2.x
    /* * Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. * SPDX-License-Identifier: MIT-0 * * Permission is hereby granted, free of charge, to any person obtaining a copy of this * software and associated documentation files (the "Software"), to deal in the Software * without restriction, including without limitation the rights to use, copy, modify, * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package software.amazon.qldb.tutorial; import com.amazon.ion.IonSystem; import com.amazon.ion.system.IonSystemBuilder; import com.fasterxml.jackson.databind.SerializationFeature; import com.fasterxml.jackson.dataformat.ion.IonObjectMapper; import com.fasterxml.jackson.dataformat.ion.ionvalue.IonValueMapper; /** * Constant values used throughout this tutorial. */ public final class Constants { public static final int RETRY_LIMIT = 4; public static final String LEDGER_NAME = "vehicle-registration"; public static final String STREAM_NAME = "vehicle-registration-stream"; public static final String VEHICLE_REGISTRATION_TABLE_NAME = "VehicleRegistration"; public static final String VEHICLE_TABLE_NAME = "Vehicle"; public static final String PERSON_TABLE_NAME = "Person"; public static final String DRIVERS_LICENSE_TABLE_NAME = "DriversLicense"; public static final String VIN_INDEX_NAME = "VIN"; public static final String PERSON_GOV_ID_INDEX_NAME = "GovId"; public static final String VEHICLE_REGISTRATION_LICENSE_PLATE_NUMBER_INDEX_NAME = "LicensePlateNumber"; public static final String DRIVER_LICENSE_NUMBER_INDEX_NAME = "LicenseNumber"; public static final String DRIVER_LICENSE_PERSONID_INDEX_NAME = "PersonId"; public static final String JOURNAL_EXPORT_S3_BUCKET_NAME_PREFIX = "qldb-tutorial-journal-export"; public static final String USER_TABLES = "information_schema.user_tables"; public static final String LEDGER_NAME_WITH_TAGS = "tags"; public static final IonSystem SYSTEM = IonSystemBuilder.standard().build(); public static final IonObjectMapper MAPPER = new IonValueMapper(SYSTEM); private Constants() { } static { MAPPER.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS); } }
    1.x
    /* * Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. * SPDX-License-Identifier: MIT-0 * * Permission is hereby granted, free of charge, to any person obtaining a copy of this * software and associated documentation files (the "Software"), to deal in the Software * without restriction, including without limitation the rights to use, copy, modify, * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package software.amazon.qldb.tutorial; import com.amazon.ion.IonSystem; import com.amazon.ion.system.IonSystemBuilder; import com.fasterxml.jackson.databind.SerializationFeature; import com.fasterxml.jackson.dataformat.ion.IonObjectMapper; import com.fasterxml.jackson.dataformat.ion.ionvalue.IonValueMapper; /** * Constant values used throughout this tutorial. */ public final class Constants { public static final int RETRY_LIMIT = 4; public static final String LEDGER_NAME = "vehicle-registration"; public static final String STREAM_NAME = "vehicle-registration-stream"; public static final String VEHICLE_REGISTRATION_TABLE_NAME = "VehicleRegistration"; public static final String VEHICLE_TABLE_NAME = "Vehicle"; public static final String PERSON_TABLE_NAME = "Person"; public static final String DRIVERS_LICENSE_TABLE_NAME = "DriversLicense"; public static final String VIN_INDEX_NAME = "VIN"; public static final String PERSON_GOV_ID_INDEX_NAME = "GovId"; public static final String VEHICLE_REGISTRATION_LICENSE_PLATE_NUMBER_INDEX_NAME = "LicensePlateNumber"; public static final String DRIVER_LICENSE_NUMBER_INDEX_NAME = "LicenseNumber"; public static final String DRIVER_LICENSE_PERSONID_INDEX_NAME = "PersonId"; public static final String JOURNAL_EXPORT_S3_BUCKET_NAME_PREFIX = "qldb-tutorial-journal-export"; public static final String USER_TABLES = "information_schema.user_tables"; public static final String LEDGER_NAME_WITH_TAGS = "tags"; public static final IonSystem SYSTEM = IonSystemBuilder.standard().build(); public static final IonObjectMapper MAPPER = new IonValueMapper(SYSTEM); private Constants() { } static { MAPPER.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS); } }
    importante

    Para el paquete Amazon Ion, debe usar el espacio de nombrescom.amazon.ionen su aplicación. LaAWS SDK for Javadepende de otro paquete Ion en el espacio de nombressoftware.amazon.ion, pero se trata de un paquete heredado que no es compatible con el controlador QLDB.

    nota

    EsteConstantsincluye una instancia de Jackson de código abiertoIonValueMapperclase. Puedes usar este mapeador para procesar tuAmazon Iondatos al realizar transacciones de lectura y escritura.

    LaCreateLedger.javatambién depende del siguiente programa (DescribeLedger.java), que describe el estado actual de su libro mayor.

    2.x
    /* * Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. * SPDX-License-Identifier: MIT-0 * * Permission is hereby granted, free of charge, to any person obtaining a copy of this * software and associated documentation files (the "Software"), to deal in the Software * without restriction, including without limitation the rights to use, copy, modify, * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package software.amazon.qldb.tutorial; import com.amazonaws.services.qldb.AmazonQLDB; import com.amazonaws.services.qldb.model.DescribeLedgerRequest; import com.amazonaws.services.qldb.model.DescribeLedgerResult; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Describe a QLDB ledger. * * This code expects that you have AWS credentials setup per: * http://docs.aws.amazon.com/java-sdk/latest/developer-guide/setup-credentials.html */ public final class DescribeLedger { public static AmazonQLDB client = CreateLedger.getClient(); public static final Logger log = LoggerFactory.getLogger(DescribeLedger.class); private DescribeLedger() { } public static void main(final String... args) { try { describe(Constants.LEDGER_NAME); } catch (Exception e) { log.error("Unable to describe a ledger!", e); } } /** * Describe a ledger. * * @param name * Name of the ledger to describe. * @return {@link DescribeLedgerResult} from QLDB. */ public static DescribeLedgerResult describe(final String name) { log.info("Let's describe ledger with name: {}...", name); DescribeLedgerRequest request = new DescribeLedgerRequest().withName(name); DescribeLedgerResult result = client.describeLedger(request); log.info("Success. Ledger description: {}", result); return result; } }
    1.x
    /* * Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. * SPDX-License-Identifier: MIT-0 * * Permission is hereby granted, free of charge, to any person obtaining a copy of this * software and associated documentation files (the "Software"), to deal in the Software * without restriction, including without limitation the rights to use, copy, modify, * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package software.amazon.qldb.tutorial; import com.amazonaws.services.qldb.AmazonQLDB; import com.amazonaws.services.qldb.model.DescribeLedgerRequest; import com.amazonaws.services.qldb.model.DescribeLedgerResult; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Describe a QLDB ledger. * * This code expects that you have AWS credentials setup per: * http://docs.aws.amazon.com/java-sdk/latest/developer-guide/setup-credentials.html */ public final class DescribeLedger { public static AmazonQLDB client = CreateLedger.getClient(); public static final Logger log = LoggerFactory.getLogger(DescribeLedger.class); private DescribeLedger() { } public static void main(final String... args) { try { describe(Constants.LEDGER_NAME); } catch (Exception e) { log.error("Unable to describe a ledger!", e); } } /** * Describe a ledger. * * @param name * Name of the ledger to describe. * @return {@link DescribeLedgerResult} from QLDB. */ public static DescribeLedgerResult describe(final String name) { log.info("Let's describe ledger with name: {}...", name); DescribeLedgerRequest request = new DescribeLedgerRequest().withName(name); DescribeLedgerResult result = client.describeLedger(request); log.info("Success. Ledger description: {}", result); return result; } }
  2. Compilación y laCreateLedger.javapara crear un libro mayor denominadovehicle-registration.

    2.x
    /* * Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. * SPDX-License-Identifier: MIT-0 * * Permission is hereby granted, free of charge, to any person obtaining a copy of this * software and associated documentation files (the "Software"), to deal in the Software * without restriction, including without limitation the rights to use, copy, modify, * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package software.amazon.qldb.tutorial; import com.amazonaws.client.builder.AwsClientBuilder; import com.amazonaws.services.qldb.AmazonQLDB; import com.amazonaws.services.qldb.AmazonQLDBClientBuilder; import com.amazonaws.services.qldb.model.CreateLedgerRequest; import com.amazonaws.services.qldb.model.CreateLedgerResult; import com.amazonaws.services.qldb.model.DescribeLedgerResult; import com.amazonaws.services.qldb.model.LedgerState; import com.amazonaws.services.qldb.model.PermissionsMode; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Create a ledger and wait for it to be active. * <p> * This code expects that you have AWS credentials setup per: * http://docs.aws.amazon.com/java-sdk/latest/developer-guide/setup-credentials.html */ public final class CreateLedger { public static final Logger log = LoggerFactory.getLogger(CreateLedger.class); public static final Long LEDGER_CREATION_POLL_PERIOD_MS = 10_000L; public static String endpoint = null; public static String region = null; public static AmazonQLDB client = getClient(); private CreateLedger() { } /** * Build a low-level QLDB client. * * @return {@link AmazonQLDB} control plane client. */ public static AmazonQLDB getClient() { AmazonQLDBClientBuilder builder = AmazonQLDBClientBuilder.standard(); if (null != endpoint && null != region) { builder.setEndpointConfiguration(new AwsClientBuilder.EndpointConfiguration(endpoint, region)); } return builder.build(); } public static void main(final String... args) throws Exception { try { client = getClient(); create(Constants.LEDGER_NAME); waitForActive(Constants.LEDGER_NAME); } catch (Exception e) { log.error("Unable to create the ledger!", e); throw e; } } /** * Create a new ledger with the specified ledger name. * * @param ledgerName Name of the ledger to be created. * @return {@link CreateLedgerResult} from QLDB. */ public static CreateLedgerResult create(final String ledgerName) { log.info("Let's create the ledger with name: {}...", ledgerName); CreateLedgerRequest request = new CreateLedgerRequest() .withName(ledgerName) .withPermissionsMode(PermissionsMode.ALLOW_ALL); CreateLedgerResult result = client.createLedger(request); log.info("Success. Ledger state: {}.", result.getState()); return result; } /** * Wait for a newly created ledger to become active. * * @param ledgerName Name of the ledger to wait on. * @return {@link DescribeLedgerResult} from QLDB. * @throws InterruptedException if thread is being interrupted. */ public static DescribeLedgerResult waitForActive(final String ledgerName) throws InterruptedException { log.info("Waiting for ledger to become active..."); while (true) { DescribeLedgerResult result = DescribeLedger.describe(ledgerName); if (result.getState().equals(LedgerState.ACTIVE.name())) { log.info("Success. Ledger is active and ready to use."); return result; } log.info("The ledger is still creating. Please wait..."); Thread.sleep(LEDGER_CREATION_POLL_PERIOD_MS); } } }
    1.x
    /* * Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. * SPDX-License-Identifier: MIT-0 * * Permission is hereby granted, free of charge, to any person obtaining a copy of this * software and associated documentation files (the "Software"), to deal in the Software * without restriction, including without limitation the rights to use, copy, modify, * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package software.amazon.qldb.tutorial; import com.amazonaws.services.qldb.AmazonQLDB; import com.amazonaws.services.qldb.AmazonQLDBClientBuilder; import com.amazonaws.services.qldb.model.CreateLedgerRequest; import com.amazonaws.services.qldb.model.CreateLedgerResult; import com.amazonaws.services.qldb.model.DescribeLedgerResult; import com.amazonaws.services.qldb.model.LedgerState; import com.amazonaws.services.qldb.model.PermissionsMode; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Create a ledger and wait for it to be active. * * This code expects that you have AWS credentials setup per: * http://docs.aws.amazon.com/java-sdk/latest/developer-guide/setup-credentials.html */ public final class CreateLedger { public static final Logger log = LoggerFactory.getLogger(CreateLedger.class); public static final Long LEDGER_CREATION_POLL_PERIOD_MS = 10_000L; public static AmazonQLDB client = getClient(); private CreateLedger() { } /** * Build a low-level QLDB client. * * @return {@link AmazonQLDB} control plane client. */ public static AmazonQLDB getClient() { return AmazonQLDBClientBuilder.standard().build(); } public static void main(final String... args) throws Exception { try { create(Constants.LEDGER_NAME); waitForActive(Constants.LEDGER_NAME); } catch (Exception e) { log.error("Unable to create the ledger!", e); throw e; } } /** * Create a new ledger with the specified ledger name. * * @param ledgerName * Name of the ledger to be created. * @return {@link CreateLedgerResult} from QLDB. */ public static CreateLedgerResult create(final String ledgerName) { log.info("Let's create the ledger with name: {}...", ledgerName); CreateLedgerRequest request = new CreateLedgerRequest() .withName(ledgerName) .withPermissionsMode(PermissionsMode.ALLOW_ALL); CreateLedgerResult result = client.createLedger(request); log.info("Success. Ledger state: {}.", result.getState()); return result; } /** * Wait for a newly created ledger to become active. * * @param ledgerName * Name of the ledger to wait on. * @return {@link DescribeLedgerResult} from QLDB. * @throws InterruptedException if thread is being interrupted. */ public static DescribeLedgerResult waitForActive(final String ledgerName) throws InterruptedException { log.info("Waiting for ledger to become active..."); while (true) { DescribeLedgerResult result = DescribeLedger.describe(ledgerName); if (result.getState().equals(LedgerState.ACTIVE.name())) { log.info("Success. Ledger is active and ready to use."); return result; } log.info("The ledger is still creating. Please wait..."); Thread.sleep(LEDGER_CREATION_POLL_PERIOD_MS); } } }
    nota
    • En el navegadorcreateLedger, debe especificar un nombre de libro mayor y un modo de permisos. Recomendamos utilizar laSTANDARDmodo de permisos para maximizar la seguridad de los datos del libro mayor.

    • Al crear un libro mayor,protección contra eliminaciónestá habilitado de forma predeterminada. Esta es una función de QLDB que impide que cualquier usuario elimine los libros de contabilidad. Tiene la opción de deshabilitar la protección contra borrado en la creación del libro mayor mediante la API de QLDB o laAWS Command Line Interface(AWS CLI).

    • Si lo desea, también puede especificar etiquetas para adjuntarlas a su libro mayor.

Para verificar tu conexión con el nuevo libro mayor, dirígete aPaso 2: Probar la conectividad con el libro mayor.