Java TableUtils类代码示例

import com.amazonaws.services.dynamodbv2.util.TableUtils; //导入依赖的package包/类
private void createRecipientTable() {
    CreateTableRequest request
            = new CreateTableRequest()
                    .withTableName(TABLE_NAME)
                    .withAttributeDefinitions(
                            new AttributeDefinition("_id", ScalarAttributeType.S)
                    )
                    .withKeySchema(
                            new KeySchemaElement("_id", KeyType.HASH)
                    )
                    .withProvisionedThroughput(new ProvisionedThroughput(10L, 10L));

    ddb.createTable(request);
    try {
        TableUtils.waitUntilActive(ddb, TABLE_NAME);
    } catch (InterruptedException  e) {
        throw new RuntimeException(e);
    }
}
 

import com.amazonaws.services.dynamodbv2.util.TableUtils; //导入依赖的package包/类
public static void main(String[] args) throws Exception {

        AmazonDynamoDBClient client = new AmazonDynamoDBClient();
        
        client.setEndpoint("http://localhost:8000");
        DynamoDB dynamoDB = new DynamoDB(client);
        
        String tableName = "Movies";
        Table table = dynamoDB.createTable(tableName,
                Arrays.asList(
                        new KeySchemaElement("year", KeyType.HASH),
                        new KeySchemaElement("title", KeyType.RANGE)), 
                Arrays.asList(
                        new AttributeDefinition("year", ScalarAttributeType.N),
                        new AttributeDefinition("title", ScalarAttributeType.S)), 
                new ProvisionedThroughput(10L, 10L));

        try {
            TableUtils.waitUntilActive(client, tableName);
            System.out.println("Table status: " + table.getDescription().getTableStatus());
        } catch (AmazonClientException e) {
            e.printStackTrace();
            System.exit(1);
        }
    }
 

import com.amazonaws.services.dynamodbv2.util.TableUtils; //导入依赖的package包/类
/**
 * Create ticket tables.
 *
 * @param deleteTables the delete tables
 */
public void createTicketTables(final boolean deleteTables) {
    final Collection<TicketDefinition> metadata = this.ticketCatalog.findAll();
    metadata.forEach(Unchecked.consumer(r -> {
        final CreateTableRequest request = new CreateTableRequest()
                .withAttributeDefinitions(new AttributeDefinition(ColumnNames.ID.getName(), ScalarAttributeType.S))
                .withKeySchema(new KeySchemaElement(ColumnNames.ID.getName(), KeyType.HASH))
                .withProvisionedThroughput(new ProvisionedThroughput(dynamoDbProperties.getReadCapacity(),
                        dynamoDbProperties.getWriteCapacity()))
                .withTableName(r.getProperties().getStorageName());


        if (deleteTables) {
            final DeleteTableRequest delete = new DeleteTableRequest(r.getProperties().getStorageName());
            LOGGER.debug("Sending delete request [{}] to remove table if necessary", delete);
            TableUtils.deleteTableIfExists(amazonDynamoDBClient, delete);
        }
        LOGGER.debug("Sending delete request [{}] to create table", request);
        TableUtils.createTableIfNotExists(amazonDynamoDBClient, request);

        LOGGER.debug("Waiting until table [{}] becomes active...", request.getTableName());
        TableUtils.waitUntilActive(amazonDynamoDBClient, request.getTableName());

        final DescribeTableRequest describeTableRequest = new DescribeTableRequest().withTableName(request.getTableName());
        LOGGER.debug("Sending request [{}] to obtain table description...", describeTableRequest);
        
        final TableDescription tableDescription = amazonDynamoDBClient.describeTable(describeTableRequest).getTable();
        LOGGER.debug("Located newly created table with description: [{}]", tableDescription);
    }));
}
 

import com.amazonaws.services.dynamodbv2.util.TableUtils; //导入依赖的package包/类
/**
 * Create tables.
 *
 * @param deleteTables the delete tables
 */
public void createServicesTable(final boolean deleteTables) {
    try {
        final CreateTableRequest request = new CreateTableRequest()
                .withAttributeDefinitions(new AttributeDefinition(ColumnNames.ID.getName(), ScalarAttributeType.S))
                .withKeySchema(new KeySchemaElement(ColumnNames.ID.getName(), KeyType.HASH))
                .withProvisionedThroughput(new ProvisionedThroughput(dynamoDbProperties.getReadCapacity(),
                        dynamoDbProperties.getWriteCapacity()))
                .withTableName(TABLE_NAME);

        if (deleteTables) {
            final DeleteTableRequest delete = new DeleteTableRequest(request.getTableName());
            LOGGER.debug("Sending delete request [{}] to remove table if necessary", delete);
            TableUtils.deleteTableIfExists(amazonDynamoDBClient, delete);
        }
        LOGGER.debug("Sending delete request [{}] to create table", request);
        TableUtils.createTableIfNotExists(amazonDynamoDBClient, request);

        LOGGER.debug("Waiting until table [{}] becomes active...", request.getTableName());
        TableUtils.waitUntilActive(amazonDynamoDBClient, request.getTableName());

        final DescribeTableRequest describeTableRequest = new DescribeTableRequest().withTableName(request.getTableName());
        LOGGER.debug("Sending request [{}] to obtain table description...", describeTableRequest);

        final TableDescription tableDescription = amazonDynamoDBClient.describeTable(describeTableRequest).getTable();
        LOGGER.debug("Located newly created table with description: [{}]", tableDescription);
    } catch (final Exception e) {
        throw Throwables.propagate(e);
    }
}
 

import com.amazonaws.services.dynamodbv2.util.TableUtils; //导入依赖的package包/类
private static void createSettingsTable(final AmazonDynamoDBClient amazonDynamoDBClient, final boolean deleteTables) {
    try {
        final CreateTableRequest request = new CreateTableRequest()
                .withAttributeDefinitions(new AttributeDefinition(ColumnNames.ID.getName(), ScalarAttributeType.S))
                .withKeySchema(new KeySchemaElement(ColumnNames.ID.getName(), KeyType.HASH))
                .withProvisionedThroughput(new ProvisionedThroughput(PROVISIONED_THROUGHPUT, PROVISIONED_THROUGHPUT))
                .withTableName(TABLE_NAME);

        if (deleteTables) {
            final DeleteTableRequest delete = new DeleteTableRequest(request.getTableName());
            LOGGER.debug("Sending delete request [{}] to remove table if necessary", delete);
            TableUtils.deleteTableIfExists(amazonDynamoDBClient, delete);
        }
        LOGGER.debug("Sending delete request [{}] to create table", request);
        TableUtils.createTableIfNotExists(amazonDynamoDBClient, request);

        LOGGER.debug("Waiting until table [{}] becomes active...", request.getTableName());
        TableUtils.waitUntilActive(amazonDynamoDBClient, request.getTableName());

        final DescribeTableRequest describeTableRequest = new DescribeTableRequest().withTableName(request.getTableName());
        LOGGER.debug("Sending request [{}] to obtain table description...", describeTableRequest);

        final TableDescription tableDescription = amazonDynamoDBClient.describeTable(describeTableRequest).getTable();
        LOGGER.debug("Located newly created table with description: [{}]", tableDescription);
    } catch (final Exception e) {
        throw Throwables.propagate(e);
    }
}
 

import com.amazonaws.services.dynamodbv2.util.TableUtils; //导入依赖的package包/类
private static void createDDBTable(String uuid, Properties props, String tableName, String tableKey, String tblPropName, String keyPropName) {
    CreateTableRequest createTableRequest = new CreateTableRequest().withTableName(tableName + uuid)
            .withKeySchema(new KeySchemaElement().withAttributeName(tableKey).withKeyType(KeyType.HASH))
            .withAttributeDefinitions(new AttributeDefinition().withAttributeName(tableKey)
                    .withAttributeType(ScalarAttributeType.S))
            .withProvisionedThroughput(
                    new ProvisionedThroughput().withReadCapacityUnits(1L).withWriteCapacityUnits(1L));
    TableUtils.createTableIfNotExists(getDynamoDB(), createTableRequest);

    props.setProperty(tblPropName, tableName + uuid);
    props.setProperty(keyPropName, tableKey);
}
 

import com.amazonaws.services.dynamodbv2.util.TableUtils; //导入依赖的package包/类
@AfterClass
public static void deleteTable() {
    final DeleteTableRequest deleteTableRequest = new DeleteTableRequest(tableName);
    // credentials need to be set in local environment
    // see http://docs.aws.amazon.com/sdk-for-java/v1/developer-guide/credentials.html
    TableUtils.deleteTableIfExists(new AmazonDynamoDBClient(), deleteTableRequest);
}
 

import com.amazonaws.services.dynamodbv2.util.TableUtils; //导入依赖的package包/类
private void ensureTableExists() throws AlexaStateException {
    // given custom table is always assumed as existing so you can have this option to bypass existance checks
    // for reason of least privileges on used AWS credentials or better performance
    if (!tableExistenceApproved || !tableExists()) {
        final ArrayList<AttributeDefinition> attributeDefinitions = new ArrayList<>();
        // describe keys (both will be Strings)
        attributeDefinitions.add(new AttributeDefinition()
                .withAttributeName(pkUser)
                .withAttributeType("S"));
        attributeDefinitions.add(new AttributeDefinition()
                .withAttributeName(pkModel)
                .withAttributeType("S"));
        // define keys with name and type
        final ArrayList<KeySchemaElement> keySchema = new ArrayList<>();
        keySchema.add(new KeySchemaElement()
                .withAttributeName(pkUser)
                .withKeyType(KeyType.HASH));
        keySchema.add(new KeySchemaElement()
                .withAttributeName(pkModel)
                .withKeyType(KeyType.RANGE));
        // prepare table creation request
        final CreateTableRequest awsRequest = new CreateTableRequest()
                .withTableName(tableName)
                .withKeySchema(keySchema)
                .withAttributeDefinitions(attributeDefinitions)
                .withProvisionedThroughput(new ProvisionedThroughput()
                        .withReadCapacityUnits(readCapacityUnits)
                        .withWriteCapacityUnits(writeCapacityUnits));
        // create on not existing table
        if (TableUtils.createTableIfNotExists(awsClient, awsRequest)) {
            log.info(String.format("Table '%1$s' is created in DynamoDB. Now standing by for up to ten minutes for this table to be in active state.", tableName));
            // wait for table to be in ACTIVE state in order to proceed with read or write
            // this could take up to possible ten minutes so be sure to run this code once before publishing your skill ;)
            try {
                TableUtils.waitUntilActive(awsClient, awsRequest.getTableName());
            } catch (final InterruptedException e) {
                final String message = String.format("Could not create DynamoDb-Table '%1$s' before writing state", tableName);
                log.error(message, e);
                throw AlexaStateException.create(message).withCause(e).withHandler(this).build();
            }
        }
    }
}