@Override
public Profile findOne(String profileName) {
AmazonDynamoDB client = null;
if (System.getProperty("useProxy") != null) {
ClientConfiguration conf =
new ClientConfiguration()
.withProxyHost(System.getProperty("proxyHost"))
.withProxyPort(Integer.valueOf(System.getProperty("proxyPort")))
.withProxyUsername(System.getProperty("proxyUsername"))
.withProxyPassword(System.getProperty("proxyPassword"));
client = new AmazonDynamoDBClient(new ClasspathPropertiesFileCredentialsProvider(), conf);
} else {
client = new AmazonDynamoDBClient(new ClasspathPropertiesFileCredentialsProvider());
}
client.setRegion(Region.getRegion(Regions.AP_NORTHEAST_1));
client.setEndpoint("https://dynamodb.ap-northeast-1.amazonaws.com");
DynamoDBMapper mapper = new DynamoDBMapper(client);
DynamoDBScanExpression scanExpression = new DynamoDBScanExpression();
Map<String, Condition> scanFilter = new HashMap<String, Condition>();
Condition scanCondition =
new Condition()
.withComparisonOperator(ComparisonOperator.EQ)
.withAttributeValueList(new AttributeValue().withS(profileName));
scanFilter.put("profile_name", scanCondition);
scanExpression.setScanFilter(scanFilter);
for (Profile p : mapper.scan(Profile.class, scanExpression)) {
return p;
}
return null;
}
// returns list of items ordered so far by the user
public CartItem decreaseQuantity(Long cartId) {
DynamoDBMapper mapper = this.conn.getMapper();
DynamoDBScanExpression scanExpression = new DynamoDBScanExpression();
Map<String, Condition> scanFilter = new HashMap<String, Condition>();
Condition scanCondition =
new Condition()
.withComparisonOperator(ComparisonOperator.EQ.toString())
.withAttributeValueList(new AttributeValue().withN(cartId.toString()));
scanFilter.put("CartId", scanCondition);
scanExpression.setScanFilter(scanFilter);
PaginatedScanList<CartItem> items = mapper.scan(CartItem.class, scanExpression);
CartItem item = items.get(0);
item.setQuantity(item.getQuantity() - 1);
mapper.save(item);
return item;
}
public void removeItemFromCart(Long cartId) {
DynamoDBMapper mapper = this.conn.getMapper();
DynamoDBScanExpression scanExpression = new DynamoDBScanExpression();
Map<String, Condition> scanFilter = new HashMap<String, Condition>();
Condition scanCondition =
new Condition()
.withComparisonOperator(ComparisonOperator.EQ.toString())
.withAttributeValueList(new AttributeValue().withN(cartId.toString()));
scanFilter.put("CartId", scanCondition);
scanExpression.setScanFilter(scanFilter);
System.out.println("Going to retrieve item.");
PaginatedScanList<CartItem> items = mapper.scan(CartItem.class, scanExpression);
System.out.println("Number of items retrived. " + items.size());
System.out.println("Going to remove a cartItem with productId: " + items.get(0).getProductId());
mapper.delete(items.get(0));
}
public static ArrayList<Account> getAccountList() {
AmazonDynamoDBClient ddb = LoginActivity.clientManager.ddb();
DynamoDBMapper mapper = new DynamoDBMapper(ddb);
DynamoDBScanExpression scanExpression = new DynamoDBScanExpression();
try {
PaginatedScanList<Account> result = mapper.scan(Account.class, scanExpression);
ArrayList<Account> resultList = new ArrayList<Account>();
for (Account up : result) {
resultList.add(up);
}
return resultList;
} catch (AmazonServiceException ex) {
LoginActivity.clientManager.wipeCredentialsOnAuthError(ex);
}
return null;
}
public static void main(String[] args) {
DynamoDBMapper mapper = new DynamoDBMapper(client);
DynamoDBScanExpression expression = new DynamoDBScanExpression();
expression.addFilterCondition(
"ConfigType",
new Condition()
.withComparisonOperator(ComparisonOperator.EQ)
.withAttributeValueList(new AttributeValue().withS("Override")));
expression.addFilterCondition(
"CountryCode",
new Condition()
.withComparisonOperator(ComparisonOperator.EQ)
.withAttributeValueList(new AttributeValue().withS("US")));
final List<ConfigObject> queryResults = mapper.scan(ConfigObject.class, expression);
for (ConfigObject config : queryResults) {
System.out.println(config);
}
}
public List<NodeHistoryEntity> findNodeHistoriesbyNodeID(String id) {
DynamoDBScanExpression scanExpression = new DynamoDBScanExpression();
scanExpression.addFilterCondition(
"NodeID",
new Condition()
.withComparisonOperator(ComparisonOperator.EQ)
.withAttributeValueList(new AttributeValue().withS(id)));
List<NodeHistory> scanResult = mapper.scan(NodeHistory.class, scanExpression);
List<NodeHistoryEntity> list = new ArrayList<>();
for (NodeHistory n : scanResult) {
NodeHistoryEntity nhe = new NodeHistoryEntity();
nhe.setNID(n.getNodeID());
nhe.setTime(n.getTime());
nhe.setSAValues(n.getSAValues());
list.add(nhe);
}
return list;
}
