Question

我正在尝试在DynamoDB中创建一个表。我可以使用DynamoDB控制台，但我更喜欢通过Java来实现。但是下面的代码给出了异常，我无法找到原因..

请检查以下代码..

String serviceRef = "ServiceRef";
ArrayList<KeySchemaElement> keySchema = new ArrayList<KeySchemaElement>();
keySchema.add(new KeySchemaElement()
        .withAttributeName("ServiceID")
        .withKeyType(KeyType.HASH));

ArrayList<AttributeDefinition> attributeDefinitions = new ArrayList<AttributeDefinition>();
attributeDefinitions.add(new AttributeDefinition()
        .withAttributeName("ServiceID")
        .withAttributeType(ScalarAttributeType.N)
        .withAttributeName("ServiceName")
        .withAttributeType(ScalarAttributeType.S)
        .withAttributeName("CreatedDateUTC")
        .withAttributeType(ScalarAttributeType.N)
        .withAttributeName("UpdatedDateUTC")
        .withAttributeType(ScalarAttributeType.N)
        .withAttributeName("IsDeleted")
        .withAttributeType(ScalarAttributeType.B));

CreateTableRequest request = new CreateTableRequest()
        .withTableName(serviceRef)
        .withKeySchema(keySchema)
        .withAttributeDefinitions(attributeDefinitions)
        .withProvisionedThroughput(
                new ProvisionedThroughput().withReadCapacityUnits(5L).withWriteCapacityUnits(1L));

System.out.println("Issuing create table request for: " + serviceRef);
dynamoDBClient.createTable(request);
System.out.println("Waiting for table Name: " + serviceRef + " to be created...");
try {
    Tables.awaitTableToBecomeActive(dynamoDBClient, serviceRef);
} catch (InterruptedException e) {
    e.printStackTrace();
}

这段代码有什么问题？它给出的错误是 -

Exception in thread "main" com.amazonaws.AmazonServiceException: One or more parameter values were invalid: Some index key attributes are not defined in AttributeDefinitions. Keys: [ServiceID], AttributeDefinitions: [IsDeleted] (Service: AmazonDynamoDBv2; Status Code: 400; Error Code: ValidationException; Request ID: SA8P5UUVH37T8P1R7F6VVPP357VV4KQNSO5AEMVJF66Q9ASUAAJG)
    at com.amazonaws.http.AmazonHttpClient.handleErrorResponse(AmazonHttpClient.java:1219)
    at com.amazonaws.http.AmazonHttpClient.executeOneRequest(AmazonHttpClient.java:803)
    at com.amazonaws.http.AmazonHttpClient.executeHelper(AmazonHttpClient.java:505)
    at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:317)
    at com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.invoke(AmazonDynamoDBClient.java:1803)
    at com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.createTable(AmazonDynamoDBClient.java:832)
    at com.rit.randemmiddleware.controller.TestMain.main(TestMain.java:38)

还有什么在

空间使用

Tables.awaitTableToBecomeActive(dynamoDBClient, serviceRef);

因为它显示已弃用。

Answer 1

您滥用AttributeDefinition方法链接。您错误地创建了一个属性定义，其名称会不断更改（从＆＃34; ServiceID＆＃34;到＆＃34; ServiceName＆＃34;到＆＃34; CreatedDateUTC＆＃34;等等，最后到＃34; IsDeleted＆＃34;）。

您需要提供一个数组或属性定义集合。例如：

attributeDefinitions.add(
    new AttributeDefinition()
        .withAttributeName("ServiceID")
        .withAttributeType(ScalarAttributeType.N),
    new AttributeDefinition()
        .withAttributeName("ServiceName")
        .withAttributeType(ScalarAttributeType.S),
    ...
);

Answer 2

您只创建了一个AttributeDefinition。您的方法链接只生成一个AttributeDefinition，而不是它们的列表。您还只需为AttributeDefinition表格或GSI的属性创建KeySchema。

attributeDefinitions.add(new AttributeDefinition()
        .withAttributeName("ServiceID")
        .withAttributeType(ScalarAttributeType.N));

对于弃用问题，请查看Tables的{{3}}：

已弃用。

使用Javadoc。

TablesUtils.waitUntilActive(dynamoDBClient, serviceRef);

Answer 3

还必须提到AttributeDefinitions应该只包含表缩放/描述所必需的列（KeySchema和GlobalSecondaryIndexes）。因为DynamoDB是无架构的。

如果您尝试创建一个表的属性多于索引所需的属性，则会收到类似以下错误：Exception in thread "main" com.amazonaws.services.dynamodbv2.model.AmazonDynamoDBException: One or more parameter values were invalid: Some AttributeDefinitions are not used. AttributeDefinitions: [Precipitation, Temperature, Rank, ID, Date, Location], keys used: [ID, Date, Location]

我是带着以下情况来到这里的：

属性定义：

attributeDefinitions.add(new AttributeDefinition("ID", "S"));
attributeDefinitions.add(new AttributeDefinition("Location", "S"));
attributeDefinitions.add(new AttributeDefinition("Date", "S"));
attributeDefinitions.add(new AttributeDefinition("Precipitation", "N"));
attributeDefinitions.add(new AttributeDefinition("Temperature", "N"));
attributeDefinitions.add(new AttributeDefinition("Rank", "N"));

关键架构：

tableKeySchema.add(new KeySchemaElement("ID", KeyType.HASH))

全球二级指数：

GlobalSecondaryIndex locationDateIndex = new GlobalSecondaryIndex()
            .withIndexName("Location_Date-Index")
            .withProjection(new 
Projection().withProjectionType(ProjectionType.ALL))
            .withProvisionedThroughput(new ProvisionedThroughput(10l, 1l))
            .withKeySchema(new KeySchemaElement("Location", KeyType.HASH))
            .withKeySchema(new KeySchemaElement("Date", KeyType.RANGE));

创建表请求：

CreateTableRequest createTableRequest = new CreateTableRequest()
    .withTableName(tableName)
    .withProvisionedThroughput(new ProvisionedThroughput(5L, 1L))
    .withAttributeDefinitions(attributeDefinitions)
    .withKeySchema(tableKeySchema)
    .withGlobalSecondaryIndexes(locationDateIndex);

以及上面的错误：

Exception in thread "main" com.amazonaws.services.dynamodbv2.model.AmazonDynamoDBException: 
One or more parameter values were invalid: Some AttributeDefinitions are not used. 
AttributeDefinitions: [Precipitation, Temperature, Rank, ID, Date, Location], 
keys used: [ID, Date, Location] (Service: AmazonDynamoDBv2; Status Code: 400; 
Error Code: ValidationException; Request ID: ...)

减少属性定义列表解决了我的问题：

attributeDefinitions.add(new AttributeDefinition("ID", "S"));
attributeDefinitions.add(new AttributeDefinition("Location", "S"));
attributeDefinitions.add(new AttributeDefinition("Date", "S"));

PS：我在这里回答是因为此页面与我在Google中的请求有关。

一个或多个参数值是无效的dynamoDB + Java

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一个或多个参数值是无效的dy​​namoDB + Java

3 个答案:

一个或多个参数值是无效的dynamoDB + Java