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, Boolean consistentRead) 

Source Link

Document

Constructs a new GetItemRequest object.

Usage

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

License:Apache License

public <T> T get(String tableName, Map<String, AttributeValue> key, final ObjectExtractor<T> extractor,
        String... columnsToInclude) throws EmptyResultDataAccessException {
    Assert.notNull(tableName, "Table must not be null");
    Assert.notNull(extractor, "ObjectExtractor must not be null");
    if (logger.isDebugEnabled()) {
        logger.debug("Executing query on " + tableName + " for " + renderKey(key));
    }/* w  ww. ja  v  a  2 s .  c o  m*/

    GetItemRequest request = new GetItemRequest(tableName, key, true);
    if (columnsToInclude != null && columnsToInclude.length > 0) {
        request.setAttributesToGet(Arrays.asList(columnsToInclude));
    }

    GetItemResult result = client.getItem(request);

    Map<String, AttributeValue> item = result.getItem();
    if (item == null) {
        throw new EmptyResultDataAccessException("No results found in " + tableName + "for " + renderKey(key));
    }

    return extractor.extract(item);
}

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From source file:org.iternine.jeppetto.dao.dynamodb.DynamoDBQueryModelDAO.java

License:Apache License

@Override
public T findById(ID id) throws NoSuchItemException, JeppettoException {
    GetItemResult result;// w  ww.  ja v  a 2s  . c om

    try {
        GetItemRequest getItemRequest = new GetItemRequest(tableName, getKeyFrom(id), consistentRead);

        getItemRequest.setProjectionExpression(projectionExpression);

        if (!projectionExpressionNames.isEmpty()) {
            getItemRequest.setExpressionAttributeNames(projectionExpressionNames);
        }

        result = dynamoDB.getItem(getItemRequest);
    } catch (AmazonClientException e) {
        throw new JeppettoException(e);
    }

    if (result.getItem() == null) {
        throw new NoSuchItemException(entityClass.getSimpleName(), id.toString());
    }

    T t = ConversionUtil.getObjectFromItem(result.getItem(), entityClass);

    ((DynamoDBPersistable) t).__markPersisted(dynamoDB.toString());

    return t;
}

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