Example usage for com.amazonaws.services.simpledb.model DeletableItem DeletableItem

Introduction

In this page you can find the example usage for com.amazonaws.services.simpledb.model DeletableItem DeletableItem.

Prototype

public DeletableItem(String name, java.util.List<Attribute> attributes) 

Source Link

Document

Constructs a new DeletableItem object.

Usage

From source file:org.teiid.resource.adapter.simpledb.SimpleDBConnectionImpl.java

License:Open Source License

/**
 * Removes item with given ItemName from domain
 * @param domainName//from  ww  w . j  av a2s  . com
 * @param itemName
 */
@Override
public int performDelete(String domainName, String selectExpression) throws TranslatorException {
    try {
        List<DeletableItem> deleteItems = new ArrayList<DeletableItem>();
        int count = 0;
        String nextToken = null;
        do {
            SelectResult result = performSelect(selectExpression, nextToken);
            nextToken = result.getNextToken();
            Iterator<Item> iter = result.getItems().iterator();
            while (iter.hasNext()) {
                Item item = iter.next();
                deleteItems.add(new DeletableItem(item.getName(), null));
                count++;
                if (count % 25 == 0) {
                    BatchDeleteAttributesRequest request = new BatchDeleteAttributesRequest(domainName,
                            deleteItems);
                    this.client.batchDeleteAttributes(request);
                    deleteItems.clear();
                }
            }
            // http://docs.aws.amazon.com/AmazonSimpleDB/latest/DeveloperGuide/SDB_API_BatchDeleteAttributes.html
            // 25 limit we may need to batch; but if batch atomicity is gone
            if (!deleteItems.isEmpty()) {
                BatchDeleteAttributesRequest request = new BatchDeleteAttributesRequest(domainName,
                        deleteItems);
                this.client.batchDeleteAttributes(request);
            }
        } while (nextToken != null);
        return count;
    } catch (AmazonServiceException e) {
        throw new TranslatorException(e);
    } catch (AmazonClientException e) {
        throw new TranslatorException(e);
    }
}

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