CODEWITHSUNDEEP
javaamazon-web-servicesamazon-dynamodb
idmitriev
idmitriev

Reputation: 5054

How to set TTL in Java based app for DynamoDB

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

Upvotes: 8

Views: 21855

Answers (3)

Mark B
Mark B

Reputation: 200527

AmazonDynamoDBClient.updateTimeToLive documented here or direct link here

Upvotes: 4

Jerry Z.
Jerry Z.

Reputation: 2051

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);
    }

Upvotes: 10

PUG
PUG

Reputation: 4472

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);

Upvotes: 2

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