Example usage for com.amazonaws.services.dynamodbv2.model ScanRequest addScanFilterEntry

Introduction

In this page you can find the example usage for com.amazonaws.services.dynamodbv2.model ScanRequest addScanFilterEntry.

Prototype

public ScanRequest addScanFilterEntry(String key, Condition value) 

Source Link

Usage

From source file:com.intuit.tank.persistence.databases.AmazonDynamoDatabaseDocApi.java

License:Open Source License

/**
 * @{inheritDoc//  w  w  w.j av  a2 s .  co  m
 */
@SuppressWarnings("unchecked")
@Override
public PagedDatabaseResult getPagedItems(String tableName, Object nextToken, String minRange, String maxRange,
        String instanceId, String jobId) {
    List<Item> ret = new ArrayList<Item>();
    Map<String, AttributeValue> lastKeyEvaluated = (Map<String, AttributeValue>) nextToken;
    ScanRequest scanRequest = new ScanRequest().withTableName(tableName);
    Map<String, Condition> conditions = new HashMap<String, Condition>();
    if (jobId != null) {
        Condition jobIdCondition = new Condition();
        jobIdCondition.withComparisonOperator(ComparisonOperator.EQ)
                .withAttributeValueList(new AttributeValue().withS(jobId));

        conditions.put(DatabaseKeys.JOB_ID_KEY.getShortKey(), jobIdCondition);
    }
    if (StringUtils.isNotBlank(instanceId)) {
        // add a filter
        Condition filter = new Condition();
        filter.withComparisonOperator(ComparisonOperator.EQ)
                .withAttributeValueList(new AttributeValue().withS(instanceId));
        scanRequest.addScanFilterEntry(DatabaseKeys.INSTANCE_ID_KEY.getShortKey(), filter);
    }
    Condition rangeKeyCondition = new Condition();
    if (minRange != null && maxRange != null) {
        rangeKeyCondition.withComparisonOperator(ComparisonOperator.BETWEEN.toString())
                .withAttributeValueList(new AttributeValue().withS(minRange))
                .withAttributeValueList(new AttributeValue().withS(maxRange));

    } else if (minRange != null) {
        rangeKeyCondition.withComparisonOperator(ComparisonOperator.GE.toString())
                .withAttributeValueList(new AttributeValue().withS(minRange));
    } else if (maxRange != null) {
        rangeKeyCondition.withComparisonOperator(ComparisonOperator.LT.toString())
                .withAttributeValueList(new AttributeValue().withS(maxRange));
    } else {
        rangeKeyCondition = null;
    }
    if (rangeKeyCondition != null) {
        conditions.put(DatabaseKeys.REQUEST_NAME_KEY.getShortKey(), rangeKeyCondition);
    }
    scanRequest.withScanFilter(conditions);
    scanRequest.withExclusiveStartKey(lastKeyEvaluated);

    ScanResult result = dynamoDb.scan(scanRequest);
    for (Map<String, AttributeValue> item : result.getItems()) {
        ret.add(getItemFromResult(item));
    }
    return new PagedDatabaseResult(ret, result.getLastEvaluatedKey());
}

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