使用 SDK for Java 2.x 的 Aurora 範例

下列程式碼範例示範如何使用 AWS SDK for Java 2.x 搭配 Aurora 執行動作和實作常見案例。

基本概念是程式碼範例，這些範例說明如何在服務內執行基本操作。

Actions 是大型程式的程式碼摘錄，必須在內容中執行。雖然動作會告訴您如何呼叫個別服務函數，但您可以在其相關情境中查看內容中的動作。

案例是向您展示如何呼叫服務中的多個函數或與其他 AWS 服務組合來完成特定任務的程式碼範例。

每個範例都包含完整原始程式碼的連結，您可以在其中找到如何在內容中設定和執行程式碼的指示。

開始使用

下列程式碼範例示範如何開始使用 Aurora。

SDK 適用於 Java 2.x

注意

還有更多功能 GitHub。尋找完整範例，並了解如何在 AWS 程式碼範例儲存庫中設定和執行。


import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.rds.RdsClient;
import software.amazon.awssdk.services.rds.paginators.DescribeDBClustersIterable;

public class DescribeDbClusters {
    public static void main(String[] args) {
        Region region = Region.US_EAST_1;
        RdsClient rdsClient = RdsClient.builder()
                .region(region)
                .build();

        describeClusters(rdsClient);
        rdsClient.close();
    }

    public static void describeClusters(RdsClient rdsClient) {
        DescribeDBClustersIterable clustersIterable = rdsClient.describeDBClustersPaginator();
        clustersIterable.stream()
                .flatMap(r -> r.dbClusters().stream())
                .forEach(cluster -> System.out
                        .println("Database name: " + cluster.databaseName() + " Arn = " + cluster.dbClusterArn()));
    }
}

如需API詳細資訊，請參閱 AWS SDK for Java 2.x API參考中的 DescribeDBClusters。

基本概念

以下程式碼範例顯示做法：

建立自訂 Aurora 資料庫叢集參數群組並設定參數值。
建立使用該參數群組的資料庫叢集。
建立包含該資料庫的資料庫執行個體。
拍攝該資料庫叢集的快照，並清理資源。

SDK 適用於 Java 2.x

注意

還有更多功能 GitHub。尋找完整範例，並了解如何在 AWS 程式碼範例儲存庫中設定和執行。


/**
 * Before running this Java (v2) code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 *
 * This example requires an AWS Secrets Manager secret that contains the
 * database credentials. If you do not create a
 * secret, this example will not work. For details, see:
 *
 * https://docs.aws.amazon.com/secretsmanager/latest/userguide/integrating_how-services-use-secrets_RS.html
 *
 * This Java example performs the following tasks:
 *
 * 1. Gets available engine families for Amazon Aurora MySQL-Compatible Edition
 * by calling the DescribeDbEngineVersions(Engine='aurora-mysql') method.
 * 2. Selects an engine family and creates a custom DB cluster parameter group
 * by invoking the describeDBClusterParameters method.
 * 3. Gets the parameter groups by invoking the describeDBClusterParameterGroups
 * method.
 * 4. Gets parameters in the group by invoking the describeDBClusterParameters
 * method.
 * 5. Modifies the auto_increment_offset parameter by invoking the
 * modifyDbClusterParameterGroupRequest method.
 * 6. Gets and displays the updated parameters.
 * 7. Gets a list of allowed engine versions by invoking the
 * describeDbEngineVersions method.
 * 8. Creates an Aurora DB cluster database cluster that contains a MySQL
 * database.
 * 9. Waits for DB instance to be ready.
 * 10. Gets a list of instance classes available for the selected engine.
 * 11. Creates a database instance in the cluster.
 * 12. Waits for DB instance to be ready.
 * 13. Creates a snapshot.
 * 14. Waits for DB snapshot to be ready.
 * 15. Deletes the DB cluster.
 * 16. Deletes the DB cluster group.
 */
public class AuroraScenario {
    public static long sleepTime = 20;
    public static final String DASHES = new String(new char[80]).replace("\0", "-");

    public static void main(String[] args) throws InterruptedException {
        final String usage = "\n" +
                "Usage:\n" +
                "    <dbClusterGroupName> <dbParameterGroupFamily> <dbInstanceClusterIdentifier> <dbInstanceIdentifier> <dbName> <dbSnapshotIdentifier><secretName>"
                +
                "Where:\n" +
                "    dbClusterGroupName - The name of the DB cluster parameter group. \n" +
                "    dbParameterGroupFamily - The DB cluster parameter group family name (for example, aurora-mysql5.7). \n"
                +
                "    dbInstanceClusterIdentifier - The instance cluster identifier value.\n" +
                "    dbInstanceIdentifier - The database instance identifier.\n" +
                "    dbName - The database name.\n" +
                "    dbSnapshotIdentifier - The snapshot identifier.\n" +
                "    secretName - The name of the AWS Secrets Manager secret that contains the database credentials\"\n";
        ;

        if (args.length != 7) {
            System.out.println(usage);
            System.exit(1);
        }

        String dbClusterGroupName = args[0];
        String dbParameterGroupFamily = args[1];
        String dbInstanceClusterIdentifier = args[2];
        String dbInstanceIdentifier = args[3];
        String dbName = args[4];
        String dbSnapshotIdentifier = args[5];
        String secretName = args[6];

        // Retrieve the database credentials using AWS Secrets Manager.
        Gson gson = new Gson();
        User user = gson.fromJson(String.valueOf(getSecretValues(secretName)), User.class);
        String username = user.getUsername();
        String userPassword = user.getPassword();

        Region region = Region.US_WEST_2;
        RdsClient rdsClient = RdsClient.builder()
                .region(region)
                .build();

        System.out.println(DASHES);
        System.out.println("Welcome to the Amazon Aurora example scenario.");
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("1. Return a list of the available DB engines");
        describeDBEngines(rdsClient);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("2. Create a custom parameter group");
        createDBClusterParameterGroup(rdsClient, dbClusterGroupName, dbParameterGroupFamily);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("3. Get the parameter group");
        describeDbClusterParameterGroups(rdsClient, dbClusterGroupName);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("4. Get the parameters in the group");
        describeDbClusterParameters(rdsClient, dbClusterGroupName, 0);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("5. Modify the auto_increment_offset parameter");
        modifyDBClusterParas(rdsClient, dbClusterGroupName);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("6. Display the updated parameter value");
        describeDbClusterParameters(rdsClient, dbClusterGroupName, -1);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("7. Get a list of allowed engine versions");
        getAllowedEngines(rdsClient, dbParameterGroupFamily);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("8. Create an Aurora DB cluster database");
        String arnClusterVal = createDBCluster(rdsClient, dbClusterGroupName, dbName, dbInstanceClusterIdentifier,
                username, userPassword);
        System.out.println("The ARN of the cluster is " + arnClusterVal);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("9. Wait for DB instance to be ready");
        waitForInstanceReady(rdsClient, dbInstanceClusterIdentifier);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("10. Get a list of instance classes available for the selected engine");
        String instanceClass = getListInstanceClasses(rdsClient);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("11. Create a database instance in the cluster.");
        String clusterDBARN = createDBInstanceCluster(rdsClient, dbInstanceIdentifier, dbInstanceClusterIdentifier,
                instanceClass);
        System.out.println("The ARN of the database is " + clusterDBARN);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("12. Wait for DB instance to be ready");
        waitDBInstanceReady(rdsClient, dbInstanceIdentifier);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("13. Create a snapshot");
        createDBClusterSnapshot(rdsClient, dbInstanceClusterIdentifier, dbSnapshotIdentifier);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("14. Wait for DB snapshot to be ready");
        waitForSnapshotReady(rdsClient, dbSnapshotIdentifier, dbInstanceClusterIdentifier);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("14. Delete the DB instance");
        deleteDatabaseInstance(rdsClient, dbInstanceIdentifier);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("15. Delete the DB cluster");
        deleteCluster(rdsClient, dbInstanceClusterIdentifier);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("16. Delete the DB cluster group");
        deleteDBClusterGroup(rdsClient, dbClusterGroupName, clusterDBARN);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("The Scenario has successfully completed.");
        System.out.println(DASHES);
        rdsClient.close();
    }

    private static SecretsManagerClient getSecretClient() {
        Region region = Region.US_WEST_2;
        return SecretsManagerClient.builder()
                .region(region)
                .credentialsProvider(EnvironmentVariableCredentialsProvider.create())
                .build();
    }

    private static String getSecretValues(String secretName) {
        SecretsManagerClient secretClient = getSecretClient();
        GetSecretValueRequest valueRequest = GetSecretValueRequest.builder()
                .secretId(secretName)
                .build();

        GetSecretValueResponse valueResponse = secretClient.getSecretValue(valueRequest);
        return valueResponse.secretString();
    }

    public static void deleteDBClusterGroup(RdsClient rdsClient, String dbClusterGroupName, String clusterDBARN)
            throws InterruptedException {
        try {
            boolean isDataDel = false;
            boolean didFind;
            String instanceARN;

            // Make sure that the database has been deleted.
            while (!isDataDel) {
                DescribeDbInstancesResponse response = rdsClient.describeDBInstances();
                List<DBInstance> instanceList = response.dbInstances();
                int listSize = instanceList.size();
                didFind = false;
                int index = 1;
                for (DBInstance instance : instanceList) {
                    instanceARN = instance.dbInstanceArn();
                    if (instanceARN.compareTo(clusterDBARN) == 0) {
                        System.out.println(clusterDBARN + " still exists");
                        didFind = true;
                    }
                    if ((index == listSize) && (!didFind)) {
                        // Went through the entire list and did not find the database ARN.
                        isDataDel = true;
                    }
                    Thread.sleep(sleepTime * 1000);
                    index++;
                }
            }

            DeleteDbClusterParameterGroupRequest clusterParameterGroupRequest = DeleteDbClusterParameterGroupRequest
                    .builder()
                    .dbClusterParameterGroupName(dbClusterGroupName)
                    .build();

            rdsClient.deleteDBClusterParameterGroup(clusterParameterGroupRequest);
            System.out.println(dbClusterGroupName + " was deleted.");

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

    public static void deleteCluster(RdsClient rdsClient, String dbInstanceClusterIdentifier) {
        try {
            DeleteDbClusterRequest deleteDbClusterRequest = DeleteDbClusterRequest.builder()
                    .dbClusterIdentifier(dbInstanceClusterIdentifier)
                    .skipFinalSnapshot(true)
                    .build();

            rdsClient.deleteDBCluster(deleteDbClusterRequest);
            System.out.println(dbInstanceClusterIdentifier + " was deleted!");

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

    public static void deleteDatabaseInstance(RdsClient rdsClient, String dbInstanceIdentifier) {
        try {
            DeleteDbInstanceRequest deleteDbInstanceRequest = DeleteDbInstanceRequest.builder()
                    .dbInstanceIdentifier(dbInstanceIdentifier)
                    .deleteAutomatedBackups(true)
                    .skipFinalSnapshot(true)
                    .build();

            DeleteDbInstanceResponse response = rdsClient.deleteDBInstance(deleteDbInstanceRequest);
            System.out.println("The status of the database is " + response.dbInstance().dbInstanceStatus());

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

    public static void waitForSnapshotReady(RdsClient rdsClient, String dbSnapshotIdentifier,
            String dbInstanceClusterIdentifier) {
        try {
            boolean snapshotReady = false;
            String snapshotReadyStr;
            System.out.println("Waiting for the snapshot to become available.");

            DescribeDbClusterSnapshotsRequest snapshotsRequest = DescribeDbClusterSnapshotsRequest.builder()
                    .dbClusterSnapshotIdentifier(dbSnapshotIdentifier)
                    .dbClusterIdentifier(dbInstanceClusterIdentifier)
                    .build();

            while (!snapshotReady) {
                DescribeDbClusterSnapshotsResponse response = rdsClient.describeDBClusterSnapshots(snapshotsRequest);
                List<DBClusterSnapshot> snapshotList = response.dbClusterSnapshots();
                for (DBClusterSnapshot snapshot : snapshotList) {
                    snapshotReadyStr = snapshot.status();
                    if (snapshotReadyStr.contains("available")) {
                        snapshotReady = true;
                    } else {
                        System.out.println(".");
                        Thread.sleep(sleepTime * 5000);
                    }
                }
            }

            System.out.println("The Snapshot is available!");

        } catch (RdsException | InterruptedException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

    public static void createDBClusterSnapshot(RdsClient rdsClient, String dbInstanceClusterIdentifier,
            String dbSnapshotIdentifier) {
        try {
            CreateDbClusterSnapshotRequest snapshotRequest = CreateDbClusterSnapshotRequest.builder()
                    .dbClusterIdentifier(dbInstanceClusterIdentifier)
                    .dbClusterSnapshotIdentifier(dbSnapshotIdentifier)
                    .build();

            CreateDbClusterSnapshotResponse response = rdsClient.createDBClusterSnapshot(snapshotRequest);
            System.out.println("The Snapshot ARN is " + response.dbClusterSnapshot().dbClusterSnapshotArn());

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

    public static void waitDBInstanceReady(RdsClient rdsClient, String dbInstanceIdentifier) {
        boolean instanceReady = false;
        String instanceReadyStr;
        System.out.println("Waiting for instance to become available.");
        try {
            DescribeDbInstancesRequest instanceRequest = DescribeDbInstancesRequest.builder()
                    .dbInstanceIdentifier(dbInstanceIdentifier)
                    .build();

            String endpoint = "";
            while (!instanceReady) {
                DescribeDbInstancesResponse response = rdsClient.describeDBInstances(instanceRequest);
                List<DBInstance> instanceList = response.dbInstances();
                for (DBInstance instance : instanceList) {
                    instanceReadyStr = instance.dbInstanceStatus();
                    if (instanceReadyStr.contains("available")) {
                        endpoint = instance.endpoint().address();
                        instanceReady = true;
                    } else {
                        System.out.print(".");
                        Thread.sleep(sleepTime * 1000);
                    }
                }
            }
            System.out.println("Database instance is available! The connection endpoint is " + endpoint);

        } catch (RdsException | InterruptedException e) {
            System.err.println(e.getMessage());
            System.exit(1);
        }
    }

    public static String createDBInstanceCluster(RdsClient rdsClient,
            String dbInstanceIdentifier,
            String dbInstanceClusterIdentifier,
            String instanceClass) {
        try {
            CreateDbInstanceRequest instanceRequest = CreateDbInstanceRequest.builder()
                    .dbInstanceIdentifier(dbInstanceIdentifier)
                    .dbClusterIdentifier(dbInstanceClusterIdentifier)
                    .engine("aurora-mysql")
                    .dbInstanceClass(instanceClass)
                    .build();

            CreateDbInstanceResponse response = rdsClient.createDBInstance(instanceRequest);
            System.out.print("The status is " + response.dbInstance().dbInstanceStatus());
            return response.dbInstance().dbInstanceArn();

        } catch (RdsException e) {
            System.err.println(e.getMessage());
            System.exit(1);
        }
        return "";
    }

    public static String getListInstanceClasses(RdsClient rdsClient) {
        try {
            DescribeOrderableDbInstanceOptionsRequest optionsRequest = DescribeOrderableDbInstanceOptionsRequest
                    .builder()
                    .engine("aurora-mysql")
                    .maxRecords(20)
                    .build();

            DescribeOrderableDbInstanceOptionsResponse response = rdsClient
                    .describeOrderableDBInstanceOptions(optionsRequest);
            List<OrderableDBInstanceOption> instanceOptions = response.orderableDBInstanceOptions();
            String instanceClass = "";
            for (OrderableDBInstanceOption instanceOption : instanceOptions) {
                instanceClass = instanceOption.dbInstanceClass();
                System.out.println("The instance class is " + instanceOption.dbInstanceClass());
                System.out.println("The engine version is " + instanceOption.engineVersion());
            }
            return instanceClass;

        } catch (RdsException e) {
            System.err.println(e.getMessage());
            System.exit(1);
        }
        return "";
    }

    // Waits until the database instance is available.
    public static void waitForInstanceReady(RdsClient rdsClient, String dbClusterIdentifier) {
        boolean instanceReady = false;
        String instanceReadyStr;
        System.out.println("Waiting for instance to become available.");
        try {
            DescribeDbClustersRequest instanceRequest = DescribeDbClustersRequest.builder()
                    .dbClusterIdentifier(dbClusterIdentifier)
                    .build();

            while (!instanceReady) {
                DescribeDbClustersResponse response = rdsClient.describeDBClusters(instanceRequest);
                List<DBCluster> clusterList = response.dbClusters();
                for (DBCluster cluster : clusterList) {
                    instanceReadyStr = cluster.status();
                    if (instanceReadyStr.contains("available")) {
                        instanceReady = true;
                    } else {
                        System.out.print(".");
                        Thread.sleep(sleepTime * 1000);
                    }
                }
            }
            System.out.println("Database cluster is available!");

        } catch (RdsException | InterruptedException e) {
            System.err.println(e.getMessage());
            System.exit(1);
        }
    }

    public static String createDBCluster(RdsClient rdsClient, String dbParameterGroupFamily, String dbName,
            String dbClusterIdentifier, String userName, String password) {
        try {
            CreateDbClusterRequest clusterRequest = CreateDbClusterRequest.builder()
                    .databaseName(dbName)
                    .dbClusterIdentifier(dbClusterIdentifier)
                    .dbClusterParameterGroupName(dbParameterGroupFamily)
                    .engine("aurora-mysql")
                    .masterUsername(userName)
                    .masterUserPassword(password)
                    .build();

            CreateDbClusterResponse response = rdsClient.createDBCluster(clusterRequest);
            return response.dbCluster().dbClusterArn();

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
        return "";
    }

    // Get a list of allowed engine versions.
    public static void getAllowedEngines(RdsClient rdsClient, String dbParameterGroupFamily) {
        try {
            DescribeDbEngineVersionsRequest versionsRequest = DescribeDbEngineVersionsRequest.builder()
                    .dbParameterGroupFamily(dbParameterGroupFamily)
                    .engine("aurora-mysql")
                    .build();

            DescribeDbEngineVersionsResponse response = rdsClient.describeDBEngineVersions(versionsRequest);
            List<DBEngineVersion> dbEngines = response.dbEngineVersions();
            for (DBEngineVersion dbEngine : dbEngines) {
                System.out.println("The engine version is " + dbEngine.engineVersion());
                System.out.println("The engine description is " + dbEngine.dbEngineDescription());
            }

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

    // Modify the auto_increment_offset parameter.
    public static void modifyDBClusterParas(RdsClient rdsClient, String dClusterGroupName) {
        try {
            Parameter parameter1 = Parameter.builder()
                    .parameterName("auto_increment_offset")
                    .applyMethod("immediate")
                    .parameterValue("5")
                    .build();

            List<Parameter> paraList = new ArrayList<>();
            paraList.add(parameter1);
            ModifyDbClusterParameterGroupRequest groupRequest = ModifyDbClusterParameterGroupRequest.builder()
                    .dbClusterParameterGroupName(dClusterGroupName)
                    .parameters(paraList)
                    .build();

            ModifyDbClusterParameterGroupResponse response = rdsClient.modifyDBClusterParameterGroup(groupRequest);
            System.out.println(
                    "The parameter group " + response.dbClusterParameterGroupName() + " was successfully modified");

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

    public static void describeDbClusterParameters(RdsClient rdsClient, String dbCLusterGroupName, int flag) {
        try {
            DescribeDbClusterParametersRequest dbParameterGroupsRequest;
            if (flag == 0) {
                dbParameterGroupsRequest = DescribeDbClusterParametersRequest.builder()
                        .dbClusterParameterGroupName(dbCLusterGroupName)
                        .build();
            } else {
                dbParameterGroupsRequest = DescribeDbClusterParametersRequest.builder()
                        .dbClusterParameterGroupName(dbCLusterGroupName)
                        .source("user")
                        .build();
            }

            DescribeDbClusterParametersResponse response = rdsClient
                    .describeDBClusterParameters(dbParameterGroupsRequest);
            List<Parameter> dbParameters = response.parameters();
            String paraName;
            for (Parameter para : dbParameters) {
                // Only print out information about either auto_increment_offset or
                // auto_increment_increment.
                paraName = para.parameterName();
                if ((paraName.compareTo("auto_increment_offset") == 0)
                        || (paraName.compareTo("auto_increment_increment ") == 0)) {
                    System.out.println("*** The parameter name is  " + paraName);
                    System.out.println("*** The parameter value is  " + para.parameterValue());
                    System.out.println("*** The parameter data type is " + para.dataType());
                    System.out.println("*** The parameter description is " + para.description());
                    System.out.println("*** The parameter allowed values  is " + para.allowedValues());
                }
            }

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

    public static void describeDbClusterParameterGroups(RdsClient rdsClient, String dbClusterGroupName) {
        try {
            DescribeDbClusterParameterGroupsRequest groupsRequest = DescribeDbClusterParameterGroupsRequest.builder()
                    .dbClusterParameterGroupName(dbClusterGroupName)
                    .maxRecords(20)
                    .build();

            List<DBClusterParameterGroup> groups = rdsClient.describeDBClusterParameterGroups(groupsRequest)
                    .dbClusterParameterGroups();
            for (DBClusterParameterGroup group : groups) {
                System.out.println("The group name is " + group.dbClusterParameterGroupName());
                System.out.println("The group ARN is " + group.dbClusterParameterGroupArn());
            }

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

    public static void createDBClusterParameterGroup(RdsClient rdsClient, String dbClusterGroupName,
            String dbParameterGroupFamily) {
        try {
            CreateDbClusterParameterGroupRequest groupRequest = CreateDbClusterParameterGroupRequest.builder()
                    .dbClusterParameterGroupName(dbClusterGroupName)
                    .dbParameterGroupFamily(dbParameterGroupFamily)
                    .description("Created by using the AWS SDK for Java")
                    .build();

            CreateDbClusterParameterGroupResponse response = rdsClient.createDBClusterParameterGroup(groupRequest);
            System.out.println("The group name is " + response.dbClusterParameterGroup().dbClusterParameterGroupName());

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

    public static void describeDBEngines(RdsClient rdsClient) {
        try {
            DescribeDbEngineVersionsRequest engineVersionsRequest = DescribeDbEngineVersionsRequest.builder()
                    .engine("aurora-mysql")
                    .defaultOnly(true)
                    .maxRecords(20)
                    .build();

            DescribeDbEngineVersionsResponse response = rdsClient.describeDBEngineVersions(engineVersionsRequest);
            List<DBEngineVersion> engines = response.dbEngineVersions();

            // Get all DBEngineVersion objects.
            for (DBEngineVersion engineOb : engines) {
                System.out.println("The name of the DB parameter group family for the database engine is "
                        + engineOb.dbParameterGroupFamily());
                System.out.println("The name of the database engine " + engineOb.engine());
                System.out.println("The version number of the database engine " + engineOb.engineVersion());
            }

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }
}

如需API詳細資訊，請參閱 AWS SDK for Java 2.x API參考中的下列主題。

動作

下列程式碼範例示範如何使用 CreateDBCluster。

SDK 適用於 Java 2.x

注意

還有更多功能 GitHub。尋找完整範例，並了解如何在 AWS 程式碼範例儲存庫中設定和執行。


    public static String createDBCluster(RdsClient rdsClient, String dbParameterGroupFamily, String dbName,
            String dbClusterIdentifier, String userName, String password) {
        try {
            CreateDbClusterRequest clusterRequest = CreateDbClusterRequest.builder()
                    .databaseName(dbName)
                    .dbClusterIdentifier(dbClusterIdentifier)
                    .dbClusterParameterGroupName(dbParameterGroupFamily)
                    .engine("aurora-mysql")
                    .masterUsername(userName)
                    .masterUserPassword(password)
                    .build();

            CreateDbClusterResponse response = rdsClient.createDBCluster(clusterRequest);
            return response.dbCluster().dbClusterArn();

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
        return "";
    }

如需API詳細資訊，請參閱 AWS SDK for Java 2.x API參考中的 CreateDBCluster。

下列程式碼範例示範如何使用 CreateDBClusterParameterGroup。

SDK 適用於 Java 2.x

注意

還有更多功能 GitHub。尋找完整範例，並了解如何在 AWS 程式碼範例儲存庫中設定和執行。


    public static void createDBClusterParameterGroup(RdsClient rdsClient, String dbClusterGroupName,
            String dbParameterGroupFamily) {
        try {
            CreateDbClusterParameterGroupRequest groupRequest = CreateDbClusterParameterGroupRequest.builder()
                    .dbClusterParameterGroupName(dbClusterGroupName)
                    .dbParameterGroupFamily(dbParameterGroupFamily)
                    .description("Created by using the AWS SDK for Java")
                    .build();

            CreateDbClusterParameterGroupResponse response = rdsClient.createDBClusterParameterGroup(groupRequest);
            System.out.println("The group name is " + response.dbClusterParameterGroup().dbClusterParameterGroupName());

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

如需API詳細資訊，請參閱 AWS SDK for Java 2.x API參考中的 CreateDBClusterParameterGroup。

下列程式碼範例示範如何使用 CreateDBClusterSnapshot。

SDK 適用於 Java 2.x

注意

還有更多功能 GitHub。尋找完整範例，並了解如何在 AWS 程式碼範例儲存庫中設定和執行。


    public static void createDBClusterSnapshot(RdsClient rdsClient, String dbInstanceClusterIdentifier,
            String dbSnapshotIdentifier) {
        try {
            CreateDbClusterSnapshotRequest snapshotRequest = CreateDbClusterSnapshotRequest.builder()
                    .dbClusterIdentifier(dbInstanceClusterIdentifier)
                    .dbClusterSnapshotIdentifier(dbSnapshotIdentifier)
                    .build();

            CreateDbClusterSnapshotResponse response = rdsClient.createDBClusterSnapshot(snapshotRequest);
            System.out.println("The Snapshot ARN is " + response.dbClusterSnapshot().dbClusterSnapshotArn());

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

如需API詳細資訊，請參閱 AWS SDK for Java 2.x API參考中的 C reateDBCluster快照。

下列程式碼範例示範如何使用 CreateDBInstance。

SDK 適用於 Java 2.x

注意

還有更多功能 GitHub。尋找完整範例，並了解如何在 AWS 程式碼範例儲存庫中設定和執行。


    public static String createDBInstanceCluster(RdsClient rdsClient,
            String dbInstanceIdentifier,
            String dbInstanceClusterIdentifier,
            String instanceClass) {
        try {
            CreateDbInstanceRequest instanceRequest = CreateDbInstanceRequest.builder()
                    .dbInstanceIdentifier(dbInstanceIdentifier)
                    .dbClusterIdentifier(dbInstanceClusterIdentifier)
                    .engine("aurora-mysql")
                    .dbInstanceClass(instanceClass)
                    .build();

            CreateDbInstanceResponse response = rdsClient.createDBInstance(instanceRequest);
            System.out.print("The status is " + response.dbInstance().dbInstanceStatus());
            return response.dbInstance().dbInstanceArn();

        } catch (RdsException e) {
            System.err.println(e.getMessage());
            System.exit(1);
        }
        return "";
    }

如需API詳細資訊，請參閱 AWS SDK for Java 2.x API參考中的 CreateDBInstance。

下列程式碼範例示範如何使用 DeleteDBCluster。

SDK 適用於 Java 2.x

注意

還有更多功能 GitHub。尋找完整範例，並了解如何在 AWS 程式碼範例儲存庫中設定和執行。


    public static void deleteCluster(RdsClient rdsClient, String dbInstanceClusterIdentifier) {
        try {
            DeleteDbClusterRequest deleteDbClusterRequest = DeleteDbClusterRequest.builder()
                    .dbClusterIdentifier(dbInstanceClusterIdentifier)
                    .skipFinalSnapshot(true)
                    .build();

            rdsClient.deleteDBCluster(deleteDbClusterRequest);
            System.out.println(dbInstanceClusterIdentifier + " was deleted!");

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

如需API詳細資訊，請參閱 AWS SDK for Java 2.x API參考中的 DeleteDBCluster。

下列程式碼範例示範如何使用 DeleteDBClusterParameterGroup。

SDK 適用於 Java 2.x

注意

還有更多功能 GitHub。尋找完整範例，並了解如何在 AWS 程式碼範例儲存庫中設定和執行。


    public static void deleteDBClusterGroup(RdsClient rdsClient, String dbClusterGroupName, String clusterDBARN)
            throws InterruptedException {
        try {
            boolean isDataDel = false;
            boolean didFind;
            String instanceARN;

            // Make sure that the database has been deleted.
            while (!isDataDel) {
                DescribeDbInstancesResponse response = rdsClient.describeDBInstances();
                List<DBInstance> instanceList = response.dbInstances();
                int listSize = instanceList.size();
                didFind = false;
                int index = 1;
                for (DBInstance instance : instanceList) {
                    instanceARN = instance.dbInstanceArn();
                    if (instanceARN.compareTo(clusterDBARN) == 0) {
                        System.out.println(clusterDBARN + " still exists");
                        didFind = true;
                    }
                    if ((index == listSize) && (!didFind)) {
                        // Went through the entire list and did not find the database ARN.
                        isDataDel = true;
                    }
                    Thread.sleep(sleepTime * 1000);
                    index++;
                }
            }

            DeleteDbClusterParameterGroupRequest clusterParameterGroupRequest = DeleteDbClusterParameterGroupRequest
                    .builder()
                    .dbClusterParameterGroupName(dbClusterGroupName)
                    .build();

            rdsClient.deleteDBClusterParameterGroup(clusterParameterGroupRequest);
            System.out.println(dbClusterGroupName + " was deleted.");

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

如需API詳細資訊，請參閱 AWS SDK for Java 2.x API參考中的 DeleteDBClusterParameterGroup。

下列程式碼範例示範如何使用 DeleteDBInstance。

SDK 適用於 Java 2.x

注意

還有更多功能 GitHub。尋找完整範例，並了解如何在 AWS 程式碼範例儲存庫中設定和執行。


    public static void deleteDatabaseInstance(RdsClient rdsClient, String dbInstanceIdentifier) {
        try {
            DeleteDbInstanceRequest deleteDbInstanceRequest = DeleteDbInstanceRequest.builder()
                    .dbInstanceIdentifier(dbInstanceIdentifier)
                    .deleteAutomatedBackups(true)
                    .skipFinalSnapshot(true)
                    .build();

            DeleteDbInstanceResponse response = rdsClient.deleteDBInstance(deleteDbInstanceRequest);
            System.out.println("The status of the database is " + response.dbInstance().dbInstanceStatus());

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

如需API詳細資訊，請參閱 AWS SDK for Java 2.x API參考中的 DeleteDBInstance。

下列程式碼範例示範如何使用 DescribeDBClusterParameterGroups。

SDK 適用於 Java 2.x

注意

還有更多功能 GitHub。尋找完整範例，並了解如何在 AWS 程式碼範例儲存庫中設定和執行。


    public static void describeDbClusterParameterGroups(RdsClient rdsClient, String dbClusterGroupName) {
        try {
            DescribeDbClusterParameterGroupsRequest groupsRequest = DescribeDbClusterParameterGroupsRequest.builder()
                    .dbClusterParameterGroupName(dbClusterGroupName)
                    .maxRecords(20)
                    .build();

            List<DBClusterParameterGroup> groups = rdsClient.describeDBClusterParameterGroups(groupsRequest)
                    .dbClusterParameterGroups();
            for (DBClusterParameterGroup group : groups) {
                System.out.println("The group name is " + group.dbClusterParameterGroupName());
                System.out.println("The group ARN is " + group.dbClusterParameterGroupArn());
            }

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

如需API詳細資訊，請參閱 AWS SDK for Java 2.x API參考中的 DescribeDBClusterParameterGroups。

下列程式碼範例示範如何使用 DescribeDBClusterParameters。

SDK 適用於 Java 2.x

注意

還有更多功能 GitHub。尋找完整範例，並了解如何在 AWS 程式碼範例儲存庫中設定和執行。


    public static void describeDbClusterParameters(RdsClient rdsClient, String dbCLusterGroupName, int flag) {
        try {
            DescribeDbClusterParametersRequest dbParameterGroupsRequest;
            if (flag == 0) {
                dbParameterGroupsRequest = DescribeDbClusterParametersRequest.builder()
                        .dbClusterParameterGroupName(dbCLusterGroupName)
                        .build();
            } else {
                dbParameterGroupsRequest = DescribeDbClusterParametersRequest.builder()
                        .dbClusterParameterGroupName(dbCLusterGroupName)
                        .source("user")
                        .build();
            }

            DescribeDbClusterParametersResponse response = rdsClient
                    .describeDBClusterParameters(dbParameterGroupsRequest);
            List<Parameter> dbParameters = response.parameters();
            String paraName;
            for (Parameter para : dbParameters) {
                // Only print out information about either auto_increment_offset or
                // auto_increment_increment.
                paraName = para.parameterName();
                if ((paraName.compareTo("auto_increment_offset") == 0)
                        || (paraName.compareTo("auto_increment_increment ") == 0)) {
                    System.out.println("*** The parameter name is  " + paraName);
                    System.out.println("*** The parameter value is  " + para.parameterValue());
                    System.out.println("*** The parameter data type is " + para.dataType());
                    System.out.println("*** The parameter description is " + para.description());
                    System.out.println("*** The parameter allowed values  is " + para.allowedValues());
                }
            }

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

如需API詳細資訊，請參閱 AWS SDK for Java 2.x API參考中的 D escribeDBCluster參數。

下列程式碼範例示範如何使用 DescribeDBClusterSnapshots。

SDK 適用於 Java 2.x

注意

還有更多功能 GitHub。尋找完整範例，並了解如何在 AWS 程式碼範例儲存庫中設定和執行。


    public static void waitForSnapshotReady(RdsClient rdsClient, String dbSnapshotIdentifier,
            String dbInstanceClusterIdentifier) {
        try {
            boolean snapshotReady = false;
            String snapshotReadyStr;
            System.out.println("Waiting for the snapshot to become available.");

            DescribeDbClusterSnapshotsRequest snapshotsRequest = DescribeDbClusterSnapshotsRequest.builder()
                    .dbClusterSnapshotIdentifier(dbSnapshotIdentifier)
                    .dbClusterIdentifier(dbInstanceClusterIdentifier)
                    .build();

            while (!snapshotReady) {
                DescribeDbClusterSnapshotsResponse response = rdsClient.describeDBClusterSnapshots(snapshotsRequest);
                List<DBClusterSnapshot> snapshotList = response.dbClusterSnapshots();
                for (DBClusterSnapshot snapshot : snapshotList) {
                    snapshotReadyStr = snapshot.status();
                    if (snapshotReadyStr.contains("available")) {
                        snapshotReady = true;
                    } else {
                        System.out.println(".");
                        Thread.sleep(sleepTime * 5000);
                    }
                }
            }

            System.out.println("The Snapshot is available!");

        } catch (RdsException | InterruptedException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

如需API詳細資訊，請參閱 AWS SDK for Java 2.x API參考中的 D escribeDBCluster快照。

下列程式碼範例示範如何使用 DescribeDBClusters。

SDK 適用於 Java 2.x

注意

還有更多功能 GitHub。尋找完整範例，並了解如何在 AWS 程式碼範例儲存庫中設定和執行。


    public static void describeDbClusterParameters(RdsClient rdsClient, String dbCLusterGroupName, int flag) {
        try {
            DescribeDbClusterParametersRequest dbParameterGroupsRequest;
            if (flag == 0) {
                dbParameterGroupsRequest = DescribeDbClusterParametersRequest.builder()
                        .dbClusterParameterGroupName(dbCLusterGroupName)
                        .build();
            } else {
                dbParameterGroupsRequest = DescribeDbClusterParametersRequest.builder()
                        .dbClusterParameterGroupName(dbCLusterGroupName)
                        .source("user")
                        .build();
            }

            DescribeDbClusterParametersResponse response = rdsClient
                    .describeDBClusterParameters(dbParameterGroupsRequest);
            List<Parameter> dbParameters = response.parameters();
            String paraName;
            for (Parameter para : dbParameters) {
                // Only print out information about either auto_increment_offset or
                // auto_increment_increment.
                paraName = para.parameterName();
                if ((paraName.compareTo("auto_increment_offset") == 0)
                        || (paraName.compareTo("auto_increment_increment ") == 0)) {
                    System.out.println("*** The parameter name is  " + paraName);
                    System.out.println("*** The parameter value is  " + para.parameterValue());
                    System.out.println("*** The parameter data type is " + para.dataType());
                    System.out.println("*** The parameter description is " + para.description());
                    System.out.println("*** The parameter allowed values  is " + para.allowedValues());
                }
            }

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

如需API詳細資訊，請參閱 AWS SDK for Java 2.x API參考中的 DescribeDBClusters。

下列程式碼範例示範如何使用 DescribeDBEngineVersions。

SDK 適用於 Java 2.x

注意

還有更多功能 GitHub。尋找完整範例，並了解如何在 AWS 程式碼範例儲存庫中設定和執行。


    public static void describeDBEngines(RdsClient rdsClient) {
        try {
            DescribeDbEngineVersionsRequest engineVersionsRequest = DescribeDbEngineVersionsRequest.builder()
                    .engine("aurora-mysql")
                    .defaultOnly(true)
                    .maxRecords(20)
                    .build();

            DescribeDbEngineVersionsResponse response = rdsClient.describeDBEngineVersions(engineVersionsRequest);
            List<DBEngineVersion> engines = response.dbEngineVersions();

            // Get all DBEngineVersion objects.
            for (DBEngineVersion engineOb : engines) {
                System.out.println("The name of the DB parameter group family for the database engine is "
                        + engineOb.dbParameterGroupFamily());
                System.out.println("The name of the database engine " + engineOb.engine());
                System.out.println("The version number of the database engine " + engineOb.engineVersion());
            }

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

如需API詳細資訊，請參閱 AWS SDK for Java 2.x API參考中的 D escribeDBEngine版本。

下列程式碼範例示範如何使用 DescribeDBInstances。

SDK 適用於 Java 2.x

注意

還有更多功能 GitHub。尋找完整範例，並了解如何在 AWS 程式碼範例儲存庫中設定和執行。


    // Waits until the database instance is available.
    public static void waitForInstanceReady(RdsClient rdsClient, String dbClusterIdentifier) {
        boolean instanceReady = false;
        String instanceReadyStr;
        System.out.println("Waiting for instance to become available.");
        try {
            DescribeDbClustersRequest instanceRequest = DescribeDbClustersRequest.builder()
                    .dbClusterIdentifier(dbClusterIdentifier)
                    .build();

            while (!instanceReady) {
                DescribeDbClustersResponse response = rdsClient.describeDBClusters(instanceRequest);
                List<DBCluster> clusterList = response.dbClusters();
                for (DBCluster cluster : clusterList) {
                    instanceReadyStr = cluster.status();
                    if (instanceReadyStr.contains("available")) {
                        instanceReady = true;
                    } else {
                        System.out.print(".");
                        Thread.sleep(sleepTime * 1000);
                    }
                }
            }
            System.out.println("Database cluster is available!");

        } catch (RdsException | InterruptedException e) {
            System.err.println(e.getMessage());
            System.exit(1);
        }
    }

如需API詳細資訊，請參閱 AWS SDK for Java 2.x API參考中的 DescribeDBInstances。

下列程式碼範例示範如何使用 DescribeOrderableDBInstanceOptions。

SDK 適用於 Java 2.x

注意

還有更多功能 GitHub。尋找完整範例，並了解如何在 AWS 程式碼範例儲存庫中設定和執行。


    public static void describeDBEngines(RdsClient rdsClient) {
        try {
            DescribeDbEngineVersionsRequest engineVersionsRequest = DescribeDbEngineVersionsRequest.builder()
                    .engine("aurora-mysql")
                    .defaultOnly(true)
                    .maxRecords(20)
                    .build();

            DescribeDbEngineVersionsResponse response = rdsClient.describeDBEngineVersions(engineVersionsRequest);
            List<DBEngineVersion> engines = response.dbEngineVersions();

            // Get all DBEngineVersion objects.
            for (DBEngineVersion engineOb : engines) {
                System.out.println("The name of the DB parameter group family for the database engine is "
                        + engineOb.dbParameterGroupFamily());
                System.out.println("The name of the database engine " + engineOb.engine());
                System.out.println("The version number of the database engine " + engineOb.engineVersion());
            }

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

如需API詳細資訊，請參閱 AWS SDK for Java 2.x API 參考DescribeOrderableDBInstanceOptions中的。

下列程式碼範例示範如何使用 ModifyDBClusterParameterGroup。

SDK 適用於 Java 2.x

注意

還有更多功能 GitHub。尋找完整範例，並了解如何在 AWS 程式碼範例儲存庫中設定和執行。


    public static void describeDbClusterParameterGroups(RdsClient rdsClient, String dbClusterGroupName) {
        try {
            DescribeDbClusterParameterGroupsRequest groupsRequest = DescribeDbClusterParameterGroupsRequest.builder()
                    .dbClusterParameterGroupName(dbClusterGroupName)
                    .maxRecords(20)
                    .build();

            List<DBClusterParameterGroup> groups = rdsClient.describeDBClusterParameterGroups(groupsRequest)
                    .dbClusterParameterGroups();
            for (DBClusterParameterGroup group : groups) {
                System.out.println("The group name is " + group.dbClusterParameterGroupName());
                System.out.println("The group ARN is " + group.dbClusterParameterGroupArn());
            }

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

如需API詳細資訊，請參閱 AWS SDK for Java 2.x API參考中的 ModifyDBClusterParameterGroup。

案例

下列程式碼範例示範如何建立 Web 應用程式，以追蹤 Amazon Aurora Serverless 資料庫中的工作項目，並使用 Amazon Simple Email Service (Amazon SES) 傳送報告。

SDK 適用於 Java 2.x

說明如何建立 Web 應用程式，以追蹤和報告存放在 Amazon RDS資料庫中的工作項目。

如需如何設定RESTAPI查詢 Amazon Aurora Serverless 資料的 Spring 並供 React 應用程式使用的完整原始程式碼和說明，請參閱上的完整範例GitHub。

如需如何設定和執行使用 JDBC 之範例的完整原始程式碼和說明API，請參閱上的完整範例GitHub。

此範例中使用的服務

Aurora
Amazon RDS
Amazon RDS Data Service
Amazon SES

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文件慣用形式

應用程式復原控制器

Auto Scaling