|
public GetItem ( |
||
| request | Container for the necessary parameters to execute the GetItem service method. | |
| return | ||
public bool CheckUserIsExist(string userID)
{
var config = new AmazonDynamoDBConfig();
GetItemResponse response;
config.ServiceURL = System.Configuration.ConfigurationManager.AppSettings["ServiceURL"];
client = new AmazonDynamoDBClient(config);
bool retval = false;
try
{
GetItemRequest request = new GetItemRequest
{
TableName = "User",
Key = new Dictionary<string, AttributeValue>() { { "UserID", new AttributeValue { S = userID } } },
ReturnConsumedCapacity = "TOTAL"
};
response = client.GetItem(request);
retval = response.Item.Count > 0;
}
catch (AmazonDynamoDBException e) { Console.WriteLine(e.Message); }
catch (AmazonServiceException e) { Console.WriteLine(e.Message); }
catch (Exception e) { Console.WriteLine(e.Message); }
return retval;
}
public void CRUDSamples()
{
EnsureTables();
PutSample();
{
#region GetItem Sample
// Create a client
AmazonDynamoDBClient client = new AmazonDynamoDBClient();
// Define item key
// Hash-key of the target item is string value "Mark Twain"
// Range-key of the target item is string value "The Adventures of Tom Sawyer"
Dictionary<string, AttributeValue> key = new Dictionary<string, AttributeValue>
{
{ "Author", new AttributeValue { S = "Mark Twain" } },
{ "Title", new AttributeValue { S = "The Adventures of Tom Sawyer" } }
};
// Create GetItem request
GetItemRequest request = new GetItemRequest
{
TableName = "SampleTable",
Key = key,
};
// Issue request
var result = client.GetItem(request);
// View response
Console.WriteLine("Item:");
Dictionary<string, AttributeValue> item = result.Item;
foreach (var keyValuePair in item)
{
Console.WriteLine("{0} : S={1}, N={2}, SS=[{3}], NS=[{4}]",
keyValuePair.Key,
keyValuePair.Value.S,
keyValuePair.Value.N,
string.Join(", ", keyValuePair.Value.SS ?? new List<string>()),
string.Join(", ", keyValuePair.Value.NS ?? new List<string>()));
}
#endregion
}
{
#region UpdateItem Sample
// Create a client
AmazonDynamoDBClient client = new AmazonDynamoDBClient();
// Define item key
// Hash-key of the target item is string value "Mark Twain"
// Range-key of the target item is string value "The Adventures of Tom Sawyer"
Dictionary<string, AttributeValue> key = new Dictionary<string, AttributeValue>
{
{ "Author", new AttributeValue { S = "Mark Twain" } },
{ "Title", new AttributeValue { S = "The Adventures of Tom Sawyer" } }
};
// Define attribute updates
Dictionary<string, AttributeValueUpdate> updates = new Dictionary<string, AttributeValueUpdate>();
// Update item's Setting attribute
updates["Setting"] = new AttributeValueUpdate()
{
Action = AttributeAction.PUT,
Value = new AttributeValue { S = "St. Petersburg, Missouri" }
};
// Remove item's Bibliography attribute
updates["Bibliography"] = new AttributeValueUpdate()
{
Action = AttributeAction.DELETE
};
// Add a new string to the item's Genres SS attribute
updates["Genres"] = new AttributeValueUpdate()
{
Action = AttributeAction.ADD,
Value = new AttributeValue { SS = new List<string> { "Bildungsroman" } }
};
// Create UpdateItem request
UpdateItemRequest request = new UpdateItemRequest
{
TableName = "SampleTable",
Key = key,
AttributeUpdates = updates
};
// Issue request
client.UpdateItem(request);
#endregion
}
{
#region DeleteItem Sample
// Create a client
AmazonDynamoDBClient client = new AmazonDynamoDBClient();
// Define item key
// Hash-key of the target item is string value "Mark Twain"
// Range-key of the target item is string value "The Adventures of Tom Sawyer"
Dictionary<string, AttributeValue> key = new Dictionary<string, AttributeValue>
{
{ "Author", new AttributeValue { S = "Mark Twain" } },
{ "Title", new AttributeValue { S = "The Adventures of Tom Sawyer" } }
};
// Create DeleteItem request
DeleteItemRequest request = new DeleteItemRequest
{
TableName = "SampleTable",
Key = key
};
// Issue request
client.DeleteItem(request);
#endregion
}
}
public Dictionary<string, object> GetUser(string userID)
{
Dictionary<string, object> retval = new Dictionary<string, object>();
GetItemResponse response;
var config = new AmazonDynamoDBConfig();
config.ServiceURL = System.Configuration.ConfigurationManager.AppSettings["ServiceURL"];
client = new AmazonDynamoDBClient(config);
try
{
GetItemRequest request = new GetItemRequest
{
TableName = "User",
Key = new Dictionary<string, AttributeValue>() { { "UserID", new AttributeValue { S = userID } } },
ReturnConsumedCapacity = "TOTAL"
};
response = client.GetItem(request);
retval.Add("UserID", response.Item["UserID"].S);
retval.Add("HeadshotURL", response.Item["HeadshotURL"].S);
retval.Add("IsPayUser", Convert.ToBoolean(response.Item["IsPayUser"].S));
retval.Add("UserName", response.Item["UserName"].S);
retval.Add("RegistDate", response.Item["RegistDate"].N);
retval.Add("LastLoginDate", response.Item["LastLoginDate"].N);
retval.Add("LastSyncDate", response.Item["LastSyncDate"].N);
}
catch (AmazonDynamoDBException e) { Console.WriteLine(e.Message); }
catch (AmazonServiceException e) { Console.WriteLine(e.Message); }
catch (Exception e) { Console.WriteLine(e.Message); }
return retval;
}
public void Can_put_item_with_null_value()
{
var db = new AmazonDynamoDBClient("keyId", "key", new AmazonDynamoDBConfig
{
ServiceURL = "http://localhost:8000",
});
try
{
db.DeleteTable(new DeleteTableRequest
{
TableName = "Test",
});
Thread.Sleep(1000);
}
catch (Exception) { /*ignore*/ }
db.CreateTable(new CreateTableRequest
{
TableName = "Test",
KeySchema = new List<KeySchemaElement>
{
new KeySchemaElement
{
AttributeName = "Id",
KeyType = "HASH"
}
},
AttributeDefinitions = new List<AttributeDefinition>
{
new AttributeDefinition
{
AttributeName = "Id",
AttributeType = "N",
}
},
ProvisionedThroughput = new ProvisionedThroughput
{
ReadCapacityUnits = 10,
WriteCapacityUnits = 5,
}
});
Thread.Sleep(1000);
db.PutItem(new PutItemRequest
{
TableName = "Test",
Item = new Dictionary<string, AttributeValue>
{
{ "Id", new AttributeValue { N = "1" } },
{ "Name", new AttributeValue { S = "Foo"} },
{ "Empty", new AttributeValue { NULL = true } },
}
});
var response = db.GetItem(new GetItemRequest
{
TableName = "Test",
ConsistentRead = true,
Key = new Dictionary<string, AttributeValue> {
{ "Id", new AttributeValue { N = "1" } }
}
});
Assert.That(response.IsItemSet);
Assert.That(response.Item["Id"].N, Is.EqualTo("1"));
Assert.That(response.Item["Name"].S, Is.EqualTo("Foo"));
Assert.That(response.Item["Empty"].NULL);
}
