public override void Invoke(AWSCredentials creds, RegionEndpoint region, int maxItems)
{
AmazonDynamoDBConfig config = new AmazonDynamoDBConfig();
config.RegionEndpoint = region;
ConfigureClient(config);
AmazonDynamoDBClient client = new AmazonDynamoDBClient(creds, config);
BatchGetItemResponse resp = new BatchGetItemResponse();
do
{
BatchGetItemRequest req = new BatchGetItemRequest
{
RequestItems = resp.UnprocessedKeys
};
resp = client.BatchGetItem(req);
CheckError(resp.HttpStatusCode, "200");
foreach (var obj in resp.Responses)
{
AddObject(obj);
}
foreach (var obj in resp.UnprocessedKeys)
{
AddObject(obj);
}
}while (resp.UnprocessedKeys.Count > 0);
}
public void DynamoDBBatchGetItem()
{
#region batch-get-item-1435614252853
var client = new AmazonDynamoDBClient();
var response = client.BatchGetItem(new BatchGetItemRequest
{
RequestItems = new Dictionary <string, KeysAndAttributes> {
{ "tablename1", new KeysAndAttributes {
Keys = new List <Dictionary <string, AttributeValue> > {
new Dictionary <string, AttributeValue> {
{ "key1", new AttributeValue {
N = "NumberAttributeValue"
} }
}
},
AttributesToGet = new List <string> {
"attr1",
"attr2"
},
ConsistentRead = true,
ProjectionExpression = "str1",
ExpressionAttributeNames = new Dictionary <string, string> {
{ "name1", "attr3" },
{ "name2", "attr4" }
}
} },
{ "tablename2", new KeysAndAttributes {
Keys = new List <Dictionary <string, AttributeValue> > {
new Dictionary <string, AttributeValue> {
{ "key2", new AttributeValue {
BOOL = true
} }
}
},
AttributesToGet = new List <string> {
"attr1",
"attr2"
},
ConsistentRead = false,
ProjectionExpression = "str2",
ExpressionAttributeNames = new Dictionary <string, string> {
{ "name1", "attr3" },
{ "name2", "attr4" }
}
} }
},
ReturnConsumedCapacity = "NONE"
});
Dictionary <string, List <Dictionary <string, AttributeValue> > > responses = response.Responses;
List <ConsumedCapacity> consumedCapacity = response.ConsumedCapacity;
#endregion
}
public void TestRequestResponseParameterAndDescriptorForAWSSDKHandler()
{
using (var client = new AmazonDynamoDBClient(new AnonymousAWSCredentials(), RegionEndpoint.USEast1))
{
CustomResponses.SetResponse(client, null, null, true);
_recorder.BeginSegment("test", TraceId);
var segment = TraceContext.GetEntity();
var key1 = new Dictionary <string, AttributeValue>()
{
{ "id", new AttributeValue("1") }
};
var key2 = new Dictionary <string, AttributeValue>()
{
{ "id", new AttributeValue("2") }
};
var keys = new KeysAndAttributes()
{
Keys = new List <Dictionary <string, AttributeValue> >()
{
key1, key2
}
};
#if NET45
client.BatchGetItem(new Dictionary <string, KeysAndAttributes>()
{
{ "test", keys }
});
#else
client.BatchGetItemAsync(new Dictionary <string, KeysAndAttributes>()
{
{ "test", keys }
}).Wait();
#endif
_recorder.EndSegment();
Assert.IsTrue(segment.Subsegments[0].Aws.ContainsKey("request_items"));
Assert.IsTrue(segment.Subsegments[0].Aws.ContainsKey("responses"));
Assert.IsTrue(segment.Subsegments[0].Aws.ContainsKey("item_count"));
Assert.IsTrue(segment.Subsegments[0].Aws.ContainsKey("table_names"));
Assert.IsTrue(segment.Subsegments[0].Aws.ContainsKey("operation"));
Assert.IsTrue(segment.Subsegments[0].Aws.ContainsKey("request_id"));
}
}
private static void RetrieveMultipleItemsBatchGet()
{
var request = new BatchGetItemRequest
{
RequestItems = new Dictionary <string, KeysAndAttributes>()
{
{ table1Name,
new KeysAndAttributes
{
Keys = new List <Dictionary <string, AttributeValue> >()
{
new Dictionary <string, AttributeValue>()
{
{ "Name", new AttributeValue {
S = "Amazon DynamoDB"
} }
},
new Dictionary <string, AttributeValue>()
{
{ "Name", new AttributeValue {
S = "Amazon S3"
} }
}
}
} },
{
table2Name,
new KeysAndAttributes
{
Keys = new List <Dictionary <string, AttributeValue> >()
{
new Dictionary <string, AttributeValue>()
{
{ "ForumName", new AttributeValue {
S = "Amazon DynamoDB"
} },
{ "Subject", new AttributeValue {
S = "DynamoDB Thread 1"
} }
},
new Dictionary <string, AttributeValue>()
{
{ "ForumName", new AttributeValue {
S = "Amazon DynamoDB"
} },
{ "Subject", new AttributeValue {
S = "DynamoDB Thread 2"
} }
},
new Dictionary <string, AttributeValue>()
{
{ "ForumName", new AttributeValue {
S = "Amazon S3"
} },
{ "Subject", new AttributeValue {
S = "S3 Thread 1"
} }
}
}
}
}
}
};
BatchGetItemResponse response;
do
{
Console.WriteLine("Making request");
response = client.BatchGetItem(request);
// Check the response.
var responses = response.Responses; // Attribute list in the response.
foreach (var tableResponse in responses)
{
var tableResults = tableResponse.Value;
Console.WriteLine("Items retrieved from table {0}", tableResponse.Key);
foreach (var item1 in tableResults)
{
PrintItem(item1);
}
}
// Any unprocessed keys? could happen if you exceed ProvisionedThroughput or some other error.
Dictionary <string, KeysAndAttributes> unprocessedKeys = response.UnprocessedKeys;
foreach (var unprocessedTableKeys in unprocessedKeys)
{
// Print table name.
Console.WriteLine(unprocessedTableKeys.Key);
// Print unprocessed primary keys.
foreach (var key in unprocessedTableKeys.Value.Keys)
{
PrintItem(key);
}
}
request.RequestItems = unprocessedKeys;
} while (response.UnprocessedKeys.Count > 0);
}
public void BatchSamples()
{
EnsureTables();
{
#region BatchGet Sample 1
// Define attributes to get and keys to retrieve
List <string> attributesToGet = new List <string> {
"Author", "Title", "Year"
};
List <Dictionary <string, AttributeValue> > sampleTableKeys = new List <Dictionary <string, AttributeValue> >
{
new Dictionary <string, AttributeValue>
{
{ "Author", new AttributeValue {
S = "Mark Twain"
} },
{ "Title", new AttributeValue {
S = "The Adventures of Tom Sawyer"
} }
},
new Dictionary <string, AttributeValue>
{
{ "Author", new AttributeValue {
S = "Mark Twain"
} },
{ "Title", new AttributeValue {
S = "Adventures of Huckleberry Finn"
} }
}
};
// Construct get-request for first table
KeysAndAttributes sampleTableItems = new KeysAndAttributes
{
AttributesToGet = attributesToGet,
Keys = sampleTableKeys
};
#endregion
#region BatchGet Sample 2
// Define keys to retrieve
List <Dictionary <string, AttributeValue> > authorsTableKeys = new List <Dictionary <string, AttributeValue> >
{
new Dictionary <string, AttributeValue>
{
{ "Author", new AttributeValue {
S = "Mark Twain"
} },
},
new Dictionary <string, AttributeValue>
{
{ "Author", new AttributeValue {
S = "Booker Taliaferro Washington"
} },
}
};
// Construct get-request for second table
// Skip setting AttributesToGet property to retrieve all attributes
KeysAndAttributes authorsTableItems = new KeysAndAttributes
{
Keys = authorsTableKeys,
};
#endregion
#region BatchGet Sample 3
// Create a client
AmazonDynamoDBClient client = new AmazonDynamoDBClient();
// Construct table-keys mapping
Dictionary <string, KeysAndAttributes> requestItems = new Dictionary <string, KeysAndAttributes>();
requestItems["SampleTable"] = sampleTableItems;
requestItems["AuthorsTable"] = authorsTableItems;
// Construct request
BatchGetItemRequest request = new BatchGetItemRequest
{
RequestItems = requestItems
};
BatchGetItemResult result;
do
{
// Issue request and retrieve items
result = client.BatchGetItem(request);
// Iterate through responses
Dictionary <string, List <Dictionary <string, AttributeValue> > > responses = result.Responses;
foreach (string tableName in responses.Keys)
{
// Get items for each table
List <Dictionary <string, AttributeValue> > tableItems = responses[tableName];
// View items
foreach (Dictionary <string, AttributeValue> item in tableItems)
{
Console.WriteLine("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>()));
}
}
}
// Some items may not have been retrieved!
// Set RequestItems to the result's UnprocessedKeys and reissue request
request.RequestItems = result.UnprocessedKeys;
} while (result.UnprocessedKeys.Count > 0);
#endregion
}
{
#region BatchWrite Sample 1
// Create items to put into first table
Dictionary <string, AttributeValue> item1 = new Dictionary <string, AttributeValue>();
item1["Author"] = new AttributeValue {
S = "Mark Twain"
};
item1["Title"] = new AttributeValue {
S = "A Connecticut Yankee in King Arthur's Court"
};
item1["Pages"] = new AttributeValue {
N = "575"
};
Dictionary <string, AttributeValue> item2 = new Dictionary <string, AttributeValue>();
item2["Author"] = new AttributeValue {
S = "Booker Taliaferro Washington"
};
item2["Title"] = new AttributeValue {
S = "My Larger Education"
};
item2["Pages"] = new AttributeValue {
N = "313"
};
item2["Year"] = new AttributeValue {
N = "1911"
};
// Create key for item to delete from first table
// Hash-key of the target item is string value "Mark Twain"
// Range-key of the target item is string value "Tom Sawyer, Detective"
Dictionary <string, AttributeValue> keyToDelete1 = new Dictionary <string, AttributeValue>
{
{ "Author", new AttributeValue {
S = "Mark Twain"
} },
{ "Title", new AttributeValue {
S = "Tom Sawyer, Detective"
} }
};
// Construct write-request for first table
List <WriteRequest> sampleTableItems = new List <WriteRequest>();
sampleTableItems.Add(new WriteRequest
{
PutRequest = new PutRequest {
Item = item1
}
});
sampleTableItems.Add(new WriteRequest
{
PutRequest = new PutRequest {
Item = item2
}
});
sampleTableItems.Add(new WriteRequest
{
DeleteRequest = new DeleteRequest {
Key = keyToDelete1
}
});
#endregion
#region BatchWrite Sample 2
// Create key for item to delete from second table
// Hash-key of the target item is string value "Francis Scott Key Fitzgerald"
Dictionary <string, AttributeValue> keyToDelete2 = new Dictionary <string, AttributeValue>
{
{ "Author", new AttributeValue {
S = "Francis Scott Key Fitzgerald"
} },
};
// Construct write-request for first table
List <WriteRequest> authorsTableItems = new List <WriteRequest>();
authorsTableItems.Add(new WriteRequest
{
DeleteRequest = new DeleteRequest {
Key = keyToDelete2
}
});
#endregion
#region BatchWrite Sample 3
// Create a client
AmazonDynamoDBClient client = new AmazonDynamoDBClient();
// Construct table-keys mapping
Dictionary <string, List <WriteRequest> > requestItems = new Dictionary <string, List <WriteRequest> >();
requestItems["SampleTable"] = sampleTableItems;
requestItems["AuthorsTable"] = authorsTableItems;
BatchWriteItemRequest request = new BatchWriteItemRequest {
RequestItems = requestItems
};
BatchWriteItemResult result;
do
{
// Issue request and retrieve items
result = client.BatchWriteItem(request);
// Some items may not have been processed!
// Set RequestItems to the result's UnprocessedItems and reissue request
request.RequestItems = result.UnprocessedItems;
} while (result.UnprocessedItems.Count > 0);
#endregion
}
}