public void PrintPyramidRot90(int levels)
{
// Left to Right
for (var j = 0; j <= (levels * 2) - 1; j++)
{
// Expand Out
if (j <= levels)
{
for (int k = 0; k < j; k++)
{
OutputAdapter.Write("*");
}
}
// Contract In
else
{
for (int l = (levels * 2) - j; l > 0; l--)
{
OutputAdapter.Write("*");
}
}
OutputAdapter.WriteLine("");
}
}
public void WhenTheApplicationIsStarted_ThenItShouldDrawTheInitialInterface()
{
// Arrange
var screenOutput = new List <string>();
var writer = new Mock <IOutputWriter>();
var outputAdapter = new OutputAdapter(writer.Object);
writer.Setup(output => output.WriteLine(It.IsAny <string>())).Callback((string s) => screenOutput.Add(s));
var ticTacToeEngine = new TicTacToeEngine();
var game = new Game(outputAdapter, ticTacToeEngine, _firstPlayer, _secondPlayer);
// Act
game.Start();
// Assert
Assert.Equal("Deep Blue is playing X, Garry Kasparov is playing O\n", screenOutput.ElementAt(0));
Assert.Equal(" | | ", screenOutput.ElementAt(1));
Assert.Equal(" | | ", screenOutput.ElementAt(2));
Assert.Equal("_____|_____|_____ ", screenOutput.ElementAt(3));
Assert.Equal(" | | ", screenOutput.ElementAt(4));
Assert.Equal(" | | ", screenOutput.ElementAt(5));
Assert.Equal("_____|_____|_____ ", screenOutput.ElementAt(6));
Assert.Equal(" | | ", screenOutput.ElementAt(7));
Assert.Equal(" | | ", screenOutput.ElementAt(8));
Assert.Equal(" | | ", screenOutput.ElementAt(9));
Assert.Equal("\nThe atmosphere is tense, press any key to start the game...", screenOutput.ElementAt(10));
// Unusual for me to be checking view content like this, would normally use a tool like selenium in a web environment
// Unusual for me to be checking multiple things with positioning, however it seems the logical choice in this instance
}
/// <summary>
/// Binds the query template to the specified adapters.
/// </summary>
/// <param name="inputAdapter">Input adapter metadata object to bind to all query template inputs.</param>
/// <param name="outputAdapter">Input adapter metadata object to bind to the query template output.</param>
/// <param name="queryTemplate">Query template to bind to adapters.</param>
/// <returns>The query binder.</returns>
private static QueryBinder BindQuery(InputAdapter inputAdapter, OutputAdapter outputAdapter, QueryTemplate queryTemplate)
{
// Create a query binder, wrapping the query template.
QueryBinder queryBinder = new QueryBinder(queryTemplate);
// Define the runtime configuration for both input adapters.
var sensorInputConf = new TextFileReaderConfig
{
InputFileName = @"..\..\..\TrafficSensors.csv",
Delimiter = ',',
CtiFrequency = 9,
CultureName = "en-US",
InputFieldOrders = new Collection <string>()
{
"SensorId", "AverageSpeed", "VehicularCount"
}
};
var locationInputConf = new TextFileReaderConfig
{
InputFileName = @"..\..\..\TrafficSensorLocations.csv",
Delimiter = ',',
CtiFrequency = 100,
CultureName = "en-US",
InputFieldOrders = new Collection <string>()
{
"SensorId", "LocationId"
}
};
// Define the runtime configuration for the output adapter.
// Specify an empty file name, which will just dump the output
// events on the console. Also pass an event handle name to
// synchronize the shutdown.
var outputConf = new TextFileWriterConfig
{
OutputFileName = string.Empty,
Delimiter = '\t'
};
// Bind input adapters to query template's input streams,
// applying runtime configuration.
// In this example, the given input file for sensor input
// contains interval events (each sensor reading has a start
// and end time), while the location input is represented by
// edge events (for each event, the end time is not known in
// advance).
queryBinder.BindProducer("sensorInput", inputAdapter, sensorInputConf, EventShape.Interval);
queryBinder.BindProducer("locationInput", inputAdapter, locationInputConf, EventShape.Edge);
// Bind output adapter to query, applying runtime
// configuration.
queryBinder.AddConsumer <TextFileWriterConfig>("queryresult", outputAdapter, outputConf, EventShape.Point, StreamEventOrder.FullyOrdered);
return(queryBinder);
}
private static void BindAndRunQuery <TPayload>(string queryName, CepStream <TPayload> queryStream, EventShape outputEventShape, List <string> inputFields, List <string> outputFields)
{
var inputConfig = new CsvInputConfig
{
InputFileName = @"..\..\..\TollInput.txt",
Delimiter = new char[] { ',' },
BufferSize = 4096,
CtiFrequency = 1,
CultureName = "en-US",
Fields = inputFields,
NonPayloadFieldCount = 2,
StartTimePos = 1,
EndTimePos = 2
};
// The adapter recognizes empty filename as a write to console.
var outputConfig = new CsvOutputConfig
{
OutputFileName = string.Empty,
Delimiter = new string[] { "\t" },
CultureName = "en-US",
Fields = outputFields
};
// Note - Please change the instance name to the one you have chosen during installation
using (var server = Server.Create("Default"))
{
Application application = server.CreateApplication("TollStationApp");
// set up input and output adapters
InputAdapter inputAdapter = application.CreateInputAdapter <CsvInputFactory>("input", "Csv Input Source");
OutputAdapter outputAdapter = application.CreateOutputAdapter <CsvOutputFactory>("output", "Csv Output");
// set up the query template
QueryTemplate queryTemplate = application.CreateQueryTemplate("QueryTemplate", string.Empty, queryStream);
// set up advance time settings to enqueue CTIs
var advanceTimeGenerationSettings = new AdvanceTimeGenerationSettings(inputConfig.CtiFrequency, TimeSpan.Zero, true);
var advanceTimeSettings = new AdvanceTimeSettings(advanceTimeGenerationSettings, null, AdvanceTimePolicy.Adjust);
// Bind query template to input and output streams
QueryBinder queryBinder = new QueryBinder(queryTemplate);
queryBinder.BindProducer <TollReading>("TollStream", inputAdapter, inputConfig, EventShape.Interval, advanceTimeSettings);
queryBinder.AddConsumer("outputStream", outputAdapter, outputConfig, outputEventShape, StreamEventOrder.FullyOrdered);
// Create a runnable query by binding the query template to the input stream of interval events,
// and to an output stream of fully ordered point events (through an output adapter instantiated
// from the output factory class)
Query query = application.CreateQuery(queryName, "Hello Toll Query", queryBinder);
RunQuery(query);
}
}
public void PrintPyramid(int levels)
{
var j = 0;
while (j < levels)
{
j += 1;
var spaces = String.Join(" ", Enumerable.Repeat("", (levels - j) + 2));
var asteriks = String.Join("", Enumerable.Repeat("*", (j * 2) - 1));
OutputAdapter.WriteLine(spaces + asteriks);
}
}
/// <summary>
/// Feeds specified neural network with data from InputAdapter and writes
/// output using OutputAdapter </summary>
/// <param name="neuralNet"> neural network </param>
/// <param name="in"> input data source </param>
/// <param name="out"> output data target </param>
public static void process(NeuralNetwork neuralNet, InputAdapter @in, OutputAdapter @out)
{
double[] input;
while ((input = @in.readInput()) != null)
{
neuralNet.Input = input;
neuralNet.calculate();
double[] output = neuralNet.Output;
@out.writeOutput(output);
}
@in.close();
@out.close();
}
/// <summary>
/// Creates and binds a query with a single input stream.
/// </summary>
private static Query CreateQuery(Application application, CepStream <EventType> streamDefinition, Uri inputAddress, Uri outputAddress)
{
QueryTemplate template = application.CreateQueryTemplate("QueryTemplate", null, streamDefinition);
QueryBinder binder = new QueryBinder(template);
InputAdapter inputAdapter = application.CreateInputAdapter <WcfInputAdapterFactory>("InputAdapter", null);
binder.BindProducer("Input", inputAdapter, inputAddress, EventShape.Point);
OutputAdapter outputAdapter = application.CreateOutputAdapter <WcfOutputAdapterFactory>("OutputAdapter", null);
binder.AddConsumer("Output", outputAdapter, outputAddress, EventShape.Point, StreamEventOrder.FullyOrdered);
Query query = application.CreateQuery("Query", null, binder);
return(query);
}
public void WhenPlayStarts_ThePlayShouldAlternateBetweenPlayers()
{
// Arrange
var writer = new Mock <IOutputWriter>();
var outputAdapter = new OutputAdapter(writer.Object);
var ticTacToeEngine = new TicTacToeEngine();
var game = new Game(outputAdapter, ticTacToeEngine, _firstPlayer, _secondPlayer);
// Act
game.Start();
// Assert
var firstPlayerMoves = ticTacToeEngine.Moves.Where((item, index) => index % 2 == 0);
Assert.True(firstPlayerMoves.SequenceEqual(_firstPlayer.Moves));
var secondPlayerMoves = ticTacToeEngine.Moves.Where((item, index) => index % 2 != 0);
Assert.True(secondPlayerMoves.SequenceEqual(_secondPlayer.Moves));
}
public void PrintPyramid(int levels)
{
// Top to Bottom
for (int i = 0; i <= levels; i++)
{
//spaces
for (int k = 0; k < (levels - i) + 1; k++)
{
OutputAdapter.Write(" ");
}
// asterik
for (int j = 0; j < (i * 2) - 1; j++)
{
OutputAdapter.Write("*");
}
OutputAdapter.WriteLine();
}
}
public void PrintPyramidRot180(int levels)
{
// Bottom to Top
for (int i = levels; i > 0; i--)
{
// Spaces
for (int k = 0; k < (levels - i) + 1; k++)
{
OutputAdapter.Write(" ");
}
// Asteriks
for (int j = 0; j < (i * 2) - 1; j++)
{
OutputAdapter.Write("*");
}
OutputAdapter.WriteLine();
}
}
public void PrintPyramidRot270(int levels)
{
// Right to Left
for (var j = 0; j <= (levels * 2) - 1; j++)
{
// Expand Out
if (j <= levels)
{
// Spaces
for (int kk = 0; kk < (levels - j); kk++)
{
OutputAdapter.Write(" ");
}
// Asteriks
for (int k = 0; k < j; k++)
{
OutputAdapter.Write("*");
}
}
// Retract In
else
{
// Spaces
for (int ll = 0; ll < j - levels; ll++)
{
OutputAdapter.Write(" ");
}
// Asteriks
for (int l = (levels * 2) - j; l > 0; l--)
{
OutputAdapter.Write("*");
}
}
OutputAdapter.WriteLine();
}
}
/// <summary>
/// Example of using a user-defined filter
/// </summary>
/// <param name="application"></param>
/// <param name="inputConfig"></param>
/// <param name="outputConfig"></param>
/// <param name="inputAdapter"></param>
/// <param name="outputAdapter"></param>
/// <returns></returns>
private static Query createUserFilterExampleQuery(Application application, StockQuoteInputConfig inputConfig, StockQuoteOutputConfig outputConfig, InputAdapter inputAdapter, OutputAdapter outputAdapter)
{
var input = CepStream<StockQuote>.Create("input");
var filteredCepStream = from e in input
where UserDefinedFilter(e.FieldID)
select e;
var queryTemplate = application.CreateQueryTemplate("userFilterExampleTemplate", "Description...", filteredCepStream);
var queryBinder = new QueryBinder(queryTemplate);
queryBinder.BindProducer<StockQuote>("input", inputAdapter, inputConfig, EventShape.Point);
queryBinder.AddConsumer<StockQuote>("output", outputAdapter, outputConfig, EventShape.Point, StreamEventOrder.ChainOrdered);
var query = application.CreateQuery("userFilterExampleQuery", "Description...", queryBinder);
return query;
}
/// <summary>
/// Compare USD and SEK stock prices using given exchange rate. Example of a cross join.
/// </summary>
/// <param name="application"></param>
/// <param name="ericUSDConfig"></param>
/// <param name="ericSEKConfig"></param>
/// <param name="USDSEKConfig"></param>
/// <param name="outputConfig"></param>
/// <param name="inputAdapter"></param>
/// <param name="outputAdapter"></param>
/// <returns></returns>
private static Query createCrossJoinExampleQuery(Application application, StockQuoteInputConfig ericUSDConfig, StockQuoteInputConfig ericSEKConfig, StockQuoteInputConfig USDSEKConfig, StockQuoteOutputConfig outputConfig, InputAdapter inputAdapter, OutputAdapter outputAdapter)
{
var ericUSDStream = CepStream <StockQuote> .Create("ericUSDStream");
var ericSEKStream = CepStream <StockQuote> .Create("ericSEKStream");
var USDSEKStream = CepStream <StockQuote> .Create("USDSEKStream");
var ericRecalcCepStream = from eUSD in ericUSDStream
from eXch in USDSEKStream // Cross join
where eUSD.FieldID == "Close"
select new StockQuote()
{
StockID = "ERIC-Recalc",
FieldID = "Close",
Value = eUSD.Value * eXch.Value // Convert ERIC USD quote to SEK
};
var ericCompareCepStream = from eRecalc in ericRecalcCepStream
from eSEK in ericSEKStream
where eSEK.FieldID == "Close"
select new StockQuote()
{
StockID = "ERIC-Compare",
FieldID = "Diff",
Value = eSEK.Value - eRecalc.Value
};
var queryTemplate = application.CreateQueryTemplate("ericCompareTemplate", "Description...", ericCompareCepStream);
var queryBinder = new QueryBinder(queryTemplate);
queryBinder.BindProducer <StockQuote>("ericUSDStream", inputAdapter, ericUSDConfig, EventShape.Point);
queryBinder.BindProducer <StockQuote>("ericSEKStream", inputAdapter, ericSEKConfig, EventShape.Point);
queryBinder.BindProducer <StockQuote>("USDSEKStream", inputAdapter, USDSEKConfig, EventShape.Point);
queryBinder.AddConsumer <StockQuote>("output", outputAdapter, outputConfig, EventShape.Point, StreamEventOrder.ChainOrdered);
var query = application.CreateQuery("ericCompareQuery", "Description...", queryBinder);
return(query);
}
/// <summary>
/// Main program.
/// </summary>
internal static void Main()
{
Console.WriteLine("Creating CEP Server");
// Creating an embedded server.
//
// In order to connect to an existing server instead of creating a
// new one, Server.Connect() can be used, with the appropriate
// endpoint exposed by the remote server.
//
// NOTE: replace "Default" with the instance name you provided
// during StreamInsight setup.
using (Server server = Server.Create("Default"))
{
try
{
// Create application in the server. The application will serve
// as a container for actual CEP objects and queries.
Console.WriteLine("Creating CEP Application");
Application application = server.CreateApplication("TrafficJoinSample");
// Create query logic as a query template
Console.WriteLine("Registering LINQ query template");
QueryTemplate queryTemplate = CreateQueryTemplate(application);
// Register adapter factories, so that the engine will be able
// to instantiate adapters when the query starts.
Console.WriteLine("Registering Adapter Factories");
InputAdapter csvInputAdapter = application.CreateInputAdapter <TextFileReaderFactory>("CSV Input", "Reading tuples from a CSV file");
OutputAdapter csvOutputAdapter = application.CreateOutputAdapter <TextFileWriterFactory>("CSV Output", "Writing result events to a CSV file");
// bind query to event producers and consumers
QueryBinder queryBinder = BindQuery(csvInputAdapter, csvOutputAdapter, queryTemplate);
// Create bound query that can be run
Console.WriteLine("Registering bound query");
Query query = application.CreateQuery("TrafficSensorQuery", "Minute average count, filtered by location threshold", queryBinder);
Console.WriteLine("Start query");
// Start the query
query.Start();
// Wait for the query to be suspended - that is the state
// it will be in as soon as the output adapter stops due to
// the end of the stream.
DiagnosticView dv = server.GetDiagnosticView(query.Name);
while ((string)dv[DiagnosticViewProperty.QueryState] == "Running")
{
// Sleep for 1s and check again
Thread.Sleep(1000);
dv = server.GetDiagnosticView(query.Name);
}
// Retrieve some diagnostic information from the CEP server
// about the query.
Console.WriteLine(string.Empty);
RetrieveDiagnostics(server.GetDiagnosticView(new Uri("cep:/Server/EventManager")), Console.Out);
RetrieveDiagnostics(server.GetDiagnosticView(new Uri("cep:/Server/PlanManager")), Console.Out);
RetrieveDiagnostics(server.GetDiagnosticView(new Uri("cep:/Server/Application/TrafficJoinSample/Query/TrafficSensorQuery")), Console.Out);
query.Stop();
}
catch (Exception e)
{
Console.WriteLine(e);
Console.ReadLine();
}
}
Console.WriteLine("\npress enter to exit application");
Console.ReadLine();
}
/// <summary>
/// Binds the query template to the specified adapters.
/// </summary>
/// <param name="inputAdapter">Input adapter metadata object to bind to all query template inputs.</param>
/// <param name="outputAdapter">Input adapter metadata object to bind to the query template output.</param>
/// <param name="queryTemplate">Query template to bind to adapters.</param>
/// <returns>The query binder.</returns>
private static QueryBinder BindQuery(InputAdapter inputAdapter, OutputAdapter outputAdapter, QueryTemplate queryTemplate)
{
// Create a query binder, wrapping the query template.
QueryBinder queryBinder = new QueryBinder(queryTemplate);
// Define the runtime configuration for both input adapters.
var sensorInputConf = new TextFileReaderConfig
{
InputFileName = @"..\..\..\TrafficSensors.csv",
Delimiter = ',',
CtiFrequency = 9,
CultureName = "en-US",
InputFieldOrders = new Collection<string>() { "SensorId", "AverageSpeed", "VehicularCount" }
};
var locationInputConf = new TextFileReaderConfig
{
InputFileName = @"..\..\..\TrafficSensorLocations.csv",
Delimiter = ',',
CtiFrequency = 100,
CultureName = "en-US",
InputFieldOrders = new Collection<string>() { "SensorId", "LocationId" }
};
// Define the runtime configuration for the output adapter.
// Specify an empty file name, which will just dump the output
// events on the console. Also pass an event handle name to
// synchronize the shutdown.
var outputConf = new TextFileWriterConfig
{
OutputFileName = string.Empty,
Delimiter = '\t'
};
// Bind input adapters to query template's input streams,
// applying runtime configuration.
// In this example, the given input file for sensor input
// contains interval events (each sensor reading has a start
// and end time), while the location input is represented by
// edge events (for each event, the end time is not known in
// advance).
queryBinder.BindProducer("sensorInput", inputAdapter, sensorInputConf, EventShape.Interval);
queryBinder.BindProducer("locationInput", inputAdapter, locationInputConf, EventShape.Edge);
// Bind output adapter to query, applying runtime
// configuration.
queryBinder.AddConsumer<TextFileWriterConfig>("queryresult", outputAdapter, outputConf, EventShape.Point, StreamEventOrder.FullyOrdered);
return queryBinder;
}
/// <summary>
/// Example of a grouping and calculation of averages for the groups
/// </summary>
/// <param name="application"></param>
/// <param name="inputConfig"></param>
/// <param name="outputConfig"></param>
/// <param name="inputAdapter"></param>
/// <param name="outputAdapter"></param>
/// <returns></returns>
private static Query createGroupApplyExampleQuery(Application application, StockQuoteInputConfig inputConfig, StockQuoteOutputConfig outputConfig, InputAdapter inputAdapter, OutputAdapter outputAdapter)
{
var input = CepStream <StockQuote> .Create("input");
var ericUSDGroupCepStream = from e in input
group e by e.FieldID into eGroup
from w in eGroup.HoppingWindow(TimeSpan.FromDays(7), TimeSpan.FromDays(1), HoppingWindowOutputPolicy.ClipToWindowEnd)
select new StockQuote()
{
StockID = "ERIC 7-day avg",
FieldID = eGroup.Key,
Value = w.Avg(e => e.Value)
};
var queryTemplate = application.CreateQueryTemplate("groupApplyExampleTemplate", "Description...", ericUSDGroupCepStream);
var queryBinder = new QueryBinder(queryTemplate);
queryBinder.BindProducer <StockQuote>("input", inputAdapter, inputConfig, EventShape.Point);
queryBinder.AddConsumer <StockQuote>("output", outputAdapter, outputConfig, EventShape.Point, StreamEventOrder.ChainOrdered);
var query = application.CreateQuery("groupApplyExampleQuery", "Description...", queryBinder);
return(query);
}
public void RegisterAdapter(OutputAdapter adapter)
{
Adapter = adapter;
RegisterAdapter(((AdapterSPI)adapter).EPServiceProvider);
}
/// <summary>
/// Example of detecting when stock price falls more than 10% in 7 days
/// </summary>
/// <param name="application"></param>
/// <param name="inputConfig"></param>
/// <param name="outputConfig"></param>
/// <param name="inputAdapter"></param>
/// <param name="outputAdapter"></param>
/// <returns></returns>
private static Query createBigLooserExampleQuery(Application application, StockQuoteInputConfig inputConfig, StockQuoteOutputConfig outputConfig, InputAdapter inputAdapter, OutputAdapter outputAdapter)
{
var input = CepStream <StockQuote> .Create("input");
var bigLooserCepStream = (from e1 in input
from e2 in input.ShiftEventTime(e => e.StartTime.AddDays(7))
where e1.FieldID == "Close" && e2.FieldID == "Close"
select new StockQuote()
{
StockID = "ERIC > 10% drop",
FieldID = "Close",
Value = (e1.Value - e2.Value) / e2.Value * 100
}).Where(e => e.Value < -10);
var queryTemplate = application.CreateQueryTemplate("bigLooserExampleTemplate", "Description...", bigLooserCepStream);
var queryBinder = new QueryBinder(queryTemplate);
queryBinder.BindProducer <StockQuote>("input", inputAdapter, inputConfig, EventShape.Point);
queryBinder.AddConsumer <StockQuote>("output", outputAdapter, outputConfig, EventShape.Point, StreamEventOrder.ChainOrdered);
var query = application.CreateQuery("bigLooserExampleQuery", "Description...", queryBinder);
return(query);
}
public void PrintPyramidRot90(int levels)
{
OutputAdapter.WriteLine("COMINGSOON");
//throw new NotImplementedException();
}
/// <summary>
/// Example of using a user-defined filter
/// </summary>
/// <param name="application"></param>
/// <param name="inputConfig"></param>
/// <param name="outputConfig"></param>
/// <param name="inputAdapter"></param>
/// <param name="outputAdapter"></param>
/// <returns></returns>
private static Query createUserFilterExampleQuery(Application application, StockQuoteInputConfig inputConfig, StockQuoteOutputConfig outputConfig, InputAdapter inputAdapter, OutputAdapter outputAdapter)
{
var input = CepStream <StockQuote> .Create("input");
var filteredCepStream = from e in input
where UserDefinedFilter(e.FieldID)
select e;
var queryTemplate = application.CreateQueryTemplate("userFilterExampleTemplate", "Description...", filteredCepStream);
var queryBinder = new QueryBinder(queryTemplate);
queryBinder.BindProducer <StockQuote>("input", inputAdapter, inputConfig, EventShape.Point);
queryBinder.AddConsumer <StockQuote>("output", outputAdapter, outputConfig, EventShape.Point, StreamEventOrder.ChainOrdered);
var query = application.CreateQuery("userFilterExampleQuery", "Description...", queryBinder);
return(query);
}
/// <summary>
/// Example of using a user-defined aggregate
/// </summary>
/// <param name="application"></param>
/// <param name="inputConfig"></param>
/// <param name="outputConfig"></param>
/// <param name="inputAdapter"></param>
/// <param name="outputAdapter"></param>
/// <returns></returns>
private static Query createStandardDeviationExampleQuery(Application application, StockQuoteInputConfig inputConfig, StockQuoteOutputConfig outputConfig, InputAdapter inputAdapter, OutputAdapter outputAdapter)
{
var input = CepStream <StockQuote> .Create("input");
var stddevCepStream = from w in input.Where(e => e.FieldID == "Close")
.HoppingWindow(TimeSpan.FromDays(7), TimeSpan.FromDays(1), HoppingWindowOutputPolicy.ClipToWindowEnd)
select new StockQuote()
{
StockID = "ERIC",
FieldID = "7-day Stddev",
Value = w.StandardDeviation()
};
var queryTemplate = application.CreateQueryTemplate("standardDeviationExampleTemplate", "Description...", stddevCepStream);
var queryBinder = new QueryBinder(queryTemplate);
queryBinder.BindProducer <StockQuote>("input", inputAdapter, inputConfig, EventShape.Point);
queryBinder.AddConsumer <StockQuote>("output", outputAdapter, outputConfig, EventShape.Point, StreamEventOrder.ChainOrdered);
var query = application.CreateQuery("standardDeviationExampleQuery", "Description...", queryBinder);
return(query);
}
/// <summary>
/// Example of detecting when stock price falls more than 10% in 7 days
/// </summary>
/// <param name="application"></param>
/// <param name="inputConfig"></param>
/// <param name="outputConfig"></param>
/// <param name="inputAdapter"></param>
/// <param name="outputAdapter"></param>
/// <returns></returns>
private static Query createBigLooserExampleQuery(Application application, StockQuoteInputConfig inputConfig, StockQuoteOutputConfig outputConfig, InputAdapter inputAdapter, OutputAdapter outputAdapter)
{
var input = CepStream<StockQuote>.Create("input");
var bigLooserCepStream = (from e1 in input
from e2 in input.ShiftEventTime(e => e.StartTime.AddDays(7))
where e1.FieldID == "Close" && e2.FieldID == "Close"
select new StockQuote()
{
StockID = "ERIC > 10% drop",
FieldID = "Close",
Value = (e1.Value - e2.Value) / e2.Value * 100
}).Where(e => e.Value < -10);
var queryTemplate = application.CreateQueryTemplate("bigLooserExampleTemplate", "Description...", bigLooserCepStream);
var queryBinder = new QueryBinder(queryTemplate);
queryBinder.BindProducer<StockQuote>("input", inputAdapter, inputConfig, EventShape.Point);
queryBinder.AddConsumer<StockQuote>("output", outputAdapter, outputConfig, EventShape.Point, StreamEventOrder.ChainOrdered);
var query = application.CreateQuery("bigLooserExampleQuery", "Description...", queryBinder);
return query;
}
/// <summary>
/// Compare USD and SEK stock prices using given exchange rate. Example of a cross join.
/// </summary>
/// <param name="application"></param>
/// <param name="ericUSDConfig"></param>
/// <param name="ericSEKConfig"></param>
/// <param name="USDSEKConfig"></param>
/// <param name="outputConfig"></param>
/// <param name="inputAdapter"></param>
/// <param name="outputAdapter"></param>
/// <returns></returns>
private static Query createCrossJoinExampleQuery(Application application, StockQuoteInputConfig ericUSDConfig, StockQuoteInputConfig ericSEKConfig, StockQuoteInputConfig USDSEKConfig, StockQuoteOutputConfig outputConfig, InputAdapter inputAdapter, OutputAdapter outputAdapter)
{
var ericUSDStream = CepStream<StockQuote>.Create("ericUSDStream");
var ericSEKStream = CepStream<StockQuote>.Create("ericSEKStream");
var USDSEKStream = CepStream<StockQuote>.Create("USDSEKStream");
var ericRecalcCepStream = from eUSD in ericUSDStream
from eXch in USDSEKStream // Cross join
where eUSD.FieldID == "Close"
select new StockQuote()
{
StockID = "ERIC-Recalc",
FieldID = "Close",
Value = eUSD.Value * eXch.Value // Convert ERIC USD quote to SEK
};
var ericCompareCepStream = from eRecalc in ericRecalcCepStream
from eSEK in ericSEKStream
where eSEK.FieldID == "Close"
select new StockQuote()
{
StockID = "ERIC-Compare",
FieldID = "Diff",
Value = eSEK.Value - eRecalc.Value
};
var queryTemplate = application.CreateQueryTemplate("ericCompareTemplate", "Description...", ericCompareCepStream);
var queryBinder = new QueryBinder(queryTemplate);
queryBinder.BindProducer<StockQuote>("ericUSDStream", inputAdapter, ericUSDConfig, EventShape.Point);
queryBinder.BindProducer<StockQuote>("ericSEKStream", inputAdapter, ericSEKConfig, EventShape.Point);
queryBinder.BindProducer<StockQuote>("USDSEKStream", inputAdapter, USDSEKConfig, EventShape.Point);
queryBinder.AddConsumer<StockQuote>("output", outputAdapter, outputConfig, EventShape.Point, StreamEventOrder.ChainOrdered);
var query = application.CreateQuery("ericCompareQuery", "Description...", queryBinder);
return query;
}
/// <summary>
/// Example of a grouping and calculation of averages for the groups
/// </summary>
/// <param name="application"></param>
/// <param name="inputConfig"></param>
/// <param name="outputConfig"></param>
/// <param name="inputAdapter"></param>
/// <param name="outputAdapter"></param>
/// <returns></returns>
private static Query createGroupApplyExampleQuery(Application application, StockQuoteInputConfig inputConfig, StockQuoteOutputConfig outputConfig, InputAdapter inputAdapter, OutputAdapter outputAdapter)
{
var input = CepStream<StockQuote>.Create("input");
var ericUSDGroupCepStream = from e in input
group e by e.FieldID into eGroup
from w in eGroup.HoppingWindow(TimeSpan.FromDays(7), TimeSpan.FromDays(1), HoppingWindowOutputPolicy.ClipToWindowEnd)
select new StockQuote()
{
StockID = "ERIC 7-day avg",
FieldID = eGroup.Key,
Value = w.Avg(e => e.Value)
};
var queryTemplate = application.CreateQueryTemplate("groupApplyExampleTemplate", "Description...", ericUSDGroupCepStream);
var queryBinder = new QueryBinder(queryTemplate);
queryBinder.BindProducer<StockQuote>("input", inputAdapter, inputConfig, EventShape.Point);
queryBinder.AddConsumer<StockQuote>("output", outputAdapter, outputConfig, EventShape.Point, StreamEventOrder.ChainOrdered);
var query = application.CreateQuery("groupApplyExampleQuery", "Description...", queryBinder);
return query;
}
/// <summary>
/// Example of using a user-defined aggregate
/// </summary>
/// <param name="application"></param>
/// <param name="inputConfig"></param>
/// <param name="outputConfig"></param>
/// <param name="inputAdapter"></param>
/// <param name="outputAdapter"></param>
/// <returns></returns>
private static Query createStandardDeviationExampleQuery(Application application, StockQuoteInputConfig inputConfig, StockQuoteOutputConfig outputConfig, InputAdapter inputAdapter, OutputAdapter outputAdapter)
{
var input = CepStream<StockQuote>.Create("input");
var stddevCepStream = from w in input.Where(e => e.FieldID == "Close")
.HoppingWindow(TimeSpan.FromDays(7), TimeSpan.FromDays(1), HoppingWindowOutputPolicy.ClipToWindowEnd)
select new StockQuote()
{
StockID = "ERIC",
FieldID = "7-day Stddev",
Value = w.StandardDeviation()
};
var queryTemplate = application.CreateQueryTemplate("standardDeviationExampleTemplate", "Description...", stddevCepStream);
var queryBinder = new QueryBinder(queryTemplate);
queryBinder.BindProducer<StockQuote>("input", inputAdapter, inputConfig, EventShape.Point);
queryBinder.AddConsumer<StockQuote>("output", outputAdapter, outputConfig, EventShape.Point, StreamEventOrder.ChainOrdered);
var query = application.CreateQuery("standardDeviationExampleQuery", "Description...", queryBinder);
return query;
}
