Example usage for com.amazonaws.services.dynamodbv2.model GetItemRequest GetItemRequest

Introduction

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

Prototype

public GetItemRequest(String tableName, java.util.Map<String, AttributeValue> key) 

Source Link

Document

Constructs a new GetItemRequest object.

Usage

From source file:com.clicktravel.infrastructure.persistence.aws.dynamodb.DynamoDbTemplate.java

License:Apache License

private Map<String, AttributeValue> readRaw(final ItemId itemId, final Class<? extends Item> itemClass,
        final Collection<String> attributes) {
    final ItemConfiguration itemConfiguration = getItemConfiguration(itemClass);
    final String tableName = databaseSchemaHolder.schemaName() + "." + itemConfiguration.tableName();
    final GetItemRequest getItemRequest = new GetItemRequest(tableName, generateKey(itemId, itemConfiguration));
    if (attributes.size() > 0) {
        getItemRequest.withAttributesToGet(attributes);

    }/*w  w  w .j av a  2  s. c  o m*/

    final GetItemResult getItemResult;
    try {
        getItemResult = amazonDynamoDbClient.getItem(getItemRequest);
    } catch (final AmazonServiceException e) {
        throw new PersistenceResourceFailureException("Failure while attempting to read from DynamoDB table",
                e);
    }

    if (getItemResult == null || getItemResult.getItem() == null) {
        throw new NonExistentItemException(String.format("The item of type [%s] with id [%s] does not exist",
                itemClass.getName(), itemId));
    } else {
        return getItemResult.getItem();
    }
}

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From source file:com.erudika.para.persistence.AWSDynamoDAO.java

License:Apache License

private Map<String, AttributeValue> readRow(String key, String appid) {
    if (StringUtils.isBlank(key) || StringUtils.isBlank(appid)) {
        return null;
    }/*from   w ww  .  java2s  .c  o  m*/
    Map<String, AttributeValue> row = null;
    try {
        GetItemRequest getItemRequest = new GetItemRequest(getTableNameForAppid(appid),
                Collections.singletonMap(Config._KEY, new AttributeValue(getKeyForAppid(key, appid))));
        GetItemResult res = client().getItem(getItemRequest);
        if (res != null && res.getItem() != null && !res.getItem().isEmpty()) {
            row = res.getItem();
        }
    } catch (Exception e) {
        logger.error("Could not read row from DB - appid={}, key={}", appid, key, e);
    }
    return (row == null || row.isEmpty()) ? null : row;
}

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From source file:com.vivastream.security.oauth2.provider.DynamoDBUserDetailsManager.java

License:Apache License

@Override
public boolean userExists(String username) {
    GetItemRequest request = new GetItemRequest(schema.getTableName(),
            Collections.singletonMap(schema.getColumnUsername(), new AttributeValue(username))) //
                    .withAttributesToGet(schema.getColumnUsername());
    GetItemResult result = client.getItem(request);
    return result.getItem() != null;
}

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From source file:org.apache.metamodel.dynamodb.DynamoDbDataContext.java

License:Apache License

@Override
protected Row executePrimaryKeyLookupQuery(Table table, List<SelectItem> selectItems, Column primaryKeyColumn,
        Object keyValue) {//w  ww.ja v a2 s  . c om
    final List<String> attributeNames = new ArrayList<>();
    for (SelectItem selectItem : selectItems) {
        attributeNames.add(selectItem.getColumn().getName());
    }

    final GetItemRequest getItemRequest = new GetItemRequest(table.getName(),
            Collections.singletonMap(primaryKeyColumn.getName(), DynamoDbUtils.toAttributeValue(keyValue)))
                    .withAttributesToGet(attributeNames);
    final GetItemResult item = _dynamoDb.getItem(getItemRequest);

    final Object[] values = new Object[selectItems.size()];
    for (int i = 0; i < values.length; i++) {
        final AttributeValue attributeValue = item.getItem().get(attributeNames.get(i));
        values[i] = DynamoDbUtils.toValue(attributeValue);
    }

    return new DefaultRow(new SimpleDataSetHeader(selectItems), values);
}

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