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

Introduction

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

Prototype

public ConditionalCheckFailedException(String message) 

Source Link

Document

Constructs a new ConditionalCheckFailedException with the specified error message.

Usage

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

License:Apache License

public <T extends Item> Collection<UniqueConstraint> getUpdatedUniqueConstraints(final T item,
        final T previousItem, final ItemConfiguration itemConfiguration) {
    final Map<String, AttributeValue> previousItemAttributeMap = getAttributeMap(previousItem,
            itemConfiguration, item.getVersion());
    if (!previousItemAttributeMap.get(VERSION_ATTRIBUTE).getN().equals(String.valueOf(item.getVersion()))) {
        throw new ConditionalCheckFailedException("Version attribute has changed: Conflict!");
    }/* w w  w  .  ja  v  a  2  s  .  c  om*/
    final Map<String, AttributeValue> updateItemAttributeMap = getAttributeMap(item, itemConfiguration,
            item.getVersion());
    final Collection<String> updatedProperties = getUpdateProperties(previousItemAttributeMap,
            updateItemAttributeMap);
    final Collection<UniqueConstraint> updatedUniqueConstraints = new HashSet<>();
    for (final UniqueConstraint uniqueConstraint : itemConfiguration.uniqueConstraints()) {
        final String propertyName = uniqueConstraint.propertyDescriptor().getName();
        if (updatedProperties.contains(propertyName)) {
            final AttributeValue previousAttributeValue = previousItemAttributeMap.get(propertyName);
            final AttributeValue updatedAttributeValue = updateItemAttributeMap.get(propertyName);
            if (previousAttributeValue == null || updatedAttributeValue == null
                    || !previousAttributeValue.getS().equalsIgnoreCase(updatedAttributeValue.getS())) {
                updatedUniqueConstraints.add(uniqueConstraint);
            }
        }
    }
    return updatedUniqueConstraints;
}

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