Example usage for com.amazonaws.services.dynamodbv2.model KeysAndAttributes toString

Introduction

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

Prototype

@Override
public String toString() 

Source Link

Document

Returns a string representation of this object.

Usage

From source file:com.vivastream.dynamodb.core.DynamoDBTemplate.java

License:Apache License

public <T> List<T> batchGet(String tableName, KeysAndAttributes keysAndAttributes,
        final ObjectExtractor<T> extractor) throws EmptyResultDataAccessException {
    Assert.notNull(tableName, "Table must not be null");
    Assert.notNull(extractor, "ObjectExtractor must not be null");
    if (logger.isDebugEnabled()) {
        logger.debug("Executing batch get on " + tableName + " for " + keysAndAttributes.toString());
    }/*from  ww  w . j av a2s  . c o  m*/

    List<T> results = new ArrayList<T>(keysAndAttributes.getKeys().size());

    Map<String, KeysAndAttributes> unprocessedKeys = Collections.singletonMap(tableName, keysAndAttributes);
    while (unprocessedKeys.size() > 0) {
        BatchGetItemResult result = client.batchGetItem(unprocessedKeys);
        List<Map<String, AttributeValue>> items = result.getResponses().get(tableName);
        if (items != null) {
            for (Map<String, AttributeValue> item : items) {
                results.add(extractor.extract(item));
            }
        }

        unprocessedKeys = result.getUnprocessedKeys();
    }

    if (results.size() == 0) {
        throw new EmptyResultDataAccessException(
                "No results found in " + tableName + "for " + keysAndAttributes.toString());
    }

    return results;
}

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