com.amazonaws.services.dynamodbv2.datamodeling

Annotation Type DynamoDBAutoGeneratedTimestamp

@Retention(value=RUNTIME)
 @Target(value={FIELD,METHOD})
public @interface DynamoDBAutoGeneratedTimestamp

Annotation for marking a property as auto-generatable. A minimal example using getter annotations,

 @DynamoDBTable(tableName="TestTable")
 public class TestClass {
     private String key;
     private Date createdDate;
     private Date lastUpdatedDate;

     @DynamoDBHashKey
     public String getKey() { return key; }
     public void setKey(String key) { this.key = key; }

     @DynamoDBAutoGeneratedTimestamp(strategy=DynamoDBAutoGenerateStrategy.CREATE)
     public Date getCreatedDate() { return createdDate; }
     public void setCreatedDate(Date createdDate) { this.createdDate = createdDate; }

     @DynamoDBAutoGeneratedTimestamp(strategy=DynamoDBAutoGenerateStrategy.ALWAYS)
     public Date getLastUpdatedDate() { return lastUpdatedDate; }
     public void setLastUpdatedDate(Date lastUpdatedDate) { this.lastUpdatedDate = lastUpdatedDate; }
 }
 

Please note, Only Calendar, Date and Long are supported for now. Primitives such as long are not supported since the unset (or null) state can't be detected.

See Also:

DynamoDBAutoGenerateStrategy

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
DynamoDBAutoGenerateStrategy	strategy The auto-generation strategy; default is ALWAYS.

Element Detail

strategy

public abstract DynamoDBAutoGenerateStrategy strategy

The auto-generation strategy; default is ALWAYS.

See Also:

DynamoDBAutoGenerateStrategy

Default:

com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBAutoGenerateStrategy.ALWAYS