Class Summary
Class	Description
SiddhiCEP	Siddhi CEP Execution Environment
SiddhiStream	Siddhi CEP API Interface
SiddhiStream.ExecutableStream
SiddhiStream.ExecutionSiddhiStream
SiddhiStream.SingleSiddhiStream<T>
SiddhiStream.UnionSiddhiStream<T>

Package org.apache.flink.contrib.siddhi Description

Features

Integrate Siddhi CEP as an stream operator (i.e. `TupleStreamSiddhiOperator`), supporting rich CEP features like
- Filter
- Join
- Aggregation
- Group by
- Having
- Window
- Conditions and Expressions
- Pattern processing
- Sequence processing
- Event Tables
- ...
Provide easy-to-use Siddhi CEP API to integrate Flink DataStream API (See `SiddhiCEP` and `SiddhiStream`)
- Register Flink DataStream associating native type information with Siddhi Stream Schema, supporting POJO,Tuple, Primitive Type, etc.
- Connect with single or multiple Flink DataStreams with Siddhi CEP Execution Plan
- Return output stream as DataStream with type intelligently inferred from Siddhi Stream Schema
Integrate siddhi runtime state management with Flink state (See `AbstractSiddhiOperator`)
Support siddhi plugin management to extend CEP functions. (See `SiddhiCEP#registerExtension`)

Example

 StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
 SiddhiCEP cep = SiddhiCEP.getSiddhiEnvironment(env);

 cep.registerExtension("custom:plus",CustomPlusFunctionExtension.class);

 cep.registerStream("inputStream1", input1, "id", "name", "price","timestamp");
 cep.registerStream("inputStream2", input2, "id", "name", "price","timestamp");

 DataStream<Tuple4<Integer,String,Integer,String>> output = cep
        .from("inputStream1").union("inputStream2")
        .sql(
                "from every s1 = inputStream1[id == 2] "
                 + " -> s2 = inputStream2[id == 3] "
                 + "select s1.id as id_1, s1.name as name_1, s2.id as id_2, s2.name as name_2 "
                 + "insert into outputStream"
        )
        .returns("outputStream");

 env.execute();

See Also:: https://github.com/wso2/siddhi