How to set TTL in Java based app for DynamoDB

Question

Hi I need to set time to live programmatically for a table in DynamoDB via AWS Java SDK. Is it possible? I know that TTL feature is introduced recently - http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/TTL.html

UPDATE: There is no special annotaion, but we can do it manually:

@DynamoDBAttribute
private long ttl;

and configure it as ttl in AWS - http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/time-to-live-ttl-how-to.html

long now = Instant.now().getEpochSecond(); // unix time
long ttl = 60 * 60 * 24; // 24 hours in sec
setTtl(ttl + now); // when object will be expired

Solution 1

AmazonDynamoDBClient.updateTimeToLive documented here or direct link here

Solution 2

http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/time-to-live-ttl-how-to.html

    public void function(final AmazonDynamoDB client, final String tableName, final String ttlField){

        //table created now enabling TTL
        final UpdateTimeToLiveRequest req = new UpdateTimeToLiveRequest();
        req.setTableName(tableName);

        final TimeToLiveSpecification ttlSpec = new TimeToLiveSpecification();
        ttlSpec.setAttributeName(ttlField);
        ttlSpec.setEnabled(true);
        req.withTimeToLiveSpecification(ttlSpec);

        client.updateTimeToLive(req);
    }

Solution 3

Code Sample here.

  //Then set ttl field like below for days in java
    //ttl 60 days
    Calendar cal = Calendar.getInstance(); //current date and time      
    cal.add(Calendar.DAY_OF_MONTH, 60); //add days
    double ttl =  (cal.getTimeInMillis() / 1000L);

Comments

[Janik Zikovsky]

I'm not sure this link is correct, it just brings me to the root of AWS SDK documentation, which is not terribly useful...

[Mark B]

@JanikZikovsky it's difficult to deep link into the documentation there, but if you go to the link and then search for AmazonDynamoDBClient, go to that page then search for updateTimeToLive you will find the documentation for updating the TTL setting.

[Janik Zikovsky]

How about this link - though it does not have the frames.