一个或多个参数值无效dynamoDB+；JAVA

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，我找不到原因

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();
}

还有在空间中使用什么

Tables.awaitTableToBecomeActive(dynamoDBClient, serviceRef);

---

因为它显示的是弃用的。

您误用了AttributeDefinition方法链接。您错误地创建了一个属性定义，其名称一直在更改（从“ServiceID”到“ServiceName”再到“CreatedDateUTC”等，最后到“IsDeleted”）

您需要提供属性定义的数组或集合。例如：

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

---

您只创建了一个

属性定义

。您的方法链接只生成一个

属性定义

，而不是它们的列表。您还只需要为表或GSI的

KeySchema

属性创建

AttributeDefinition

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

有关弃用问题，请查看

表的列表

：

已弃用。

使用

---

还有必要提及的是，AttributeDefinition应该只包含表贴花/描述（KeySchema和GlobalSecondarinIndex）所需的列。因为DynamoDB是无模式的

如果您试图创建一个属性多于索引所需属性的表，则会出现如下错误：

线程“main”com.amazonaws.services.dynamodbv2.model.amazondynamodexception中出现异常：一个或多个参数值无效：未使用某些AttributeDefinition。属性定义：[降水量、温度、等级、ID、日期、位置]，使用的键：[ID、日期、位置]

我是带着下面的案子来的：

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"));

密钥架构：

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这个页面与我在Google中的请求相关。

为了测试table active，javadoc建议您使用TableUtils.waitUntilActive（AmazonDynamoDB，String）。非常感谢，我犯了一个非常基本的错误。在相应地更改代码后，现在我可以创建我的表了。谢谢您的回复。我现在可以创建代码了。但从那以后，我有了另一个问题。如果我创建一个空表会发生什么？它会变得活跃吗？目前我得到的例外是。。。。线程“main”com.amazonaws.AmazonClientException中的异常：com.amazonaws.services.dynamodbv2.util.TableUtils.waitunticative（TableUtils.java:150）com.amazonaws.services.dynamodbv2.util.TableUtils.waitunticative（TableUtils.java:117）com.rit.randemmiddleware.controller.TestMain上的TableServiceRef从未激活（TestMain.java:47）@GourabBanerjee您是在使用DynamoDB Local，还是在运行一个端点？不是。我使用凭据直接连接到Amazon SQS。是的，我使用US_WEST_2作为区域端点。感谢您花时间回答这个问题，这帮助我解决了我的问题。

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: ...)

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