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From apivovarov <...@git.apache.org>
Subject [GitHub] flink pull request #2487: [FLINK-4520][flink-siddhi] Integrate Siddhi as a l...
Date Sat, 10 Sep 2016 04:13:29 GMT
Github user apivovarov commented on a diff in the pull request:

    https://github.com/apache/flink/pull/2487#discussion_r78270757
  
    --- Diff: flink-contrib/flink-siddhi/src/main/java/org/apache/flink/contrib/siddhi/SiddhiCEP.java
---
    @@ -0,0 +1,118 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one or more
    + * contributor license agreements.  See the NOTICE file distributed with
    + * this work for additional information regarding copyright ownership.
    + * The ASF licenses this file to You under the Apache License, Version 2.0
    + * (the "License"); you may not use this file except in compliance with
    + * the License.  You may obtain a copy of the License at
    + * <p/>
    + * http://www.apache.org/licenses/LICENSE-2.0
    + * <p/>
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +
    +package org.apache.flink.contrib.siddhi;
    +
    +import org.apache.flink.annotation.PublicEvolving;
    +import org.apache.flink.contrib.siddhi.exception.DuplicatedStreamException;
    +import org.apache.flink.contrib.siddhi.exception.UndefinedStreamException;
    +import org.apache.flink.contrib.siddhi.schema.SiddhiStreamSchema;
    +import org.apache.flink.streaming.api.datastream.DataStream;
    +import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
    +
    +import java.util.HashMap;
    +import java.util.Map;
    +
    +/**
    + * Siddhi CEP Execution Environment
    + */
    +@PublicEvolving
    +public class SiddhiCEP {
    +	private final StreamExecutionEnvironment executionEnvironment;
    +	private final Map<String, DataStream<?>> dataStreams;
    +	private final Map<String, SiddhiStreamSchema<?>> dataStreamSchemas;
    +	private final Map<String,Class<?>> extensions = new HashMap<>();
    +
    +	public Map<String, DataStream<?>> getDataStreams(){
    +		return this.dataStreams;
    +	}
    +
    +	public Map<String, SiddhiStreamSchema<?>> getDataStreamSchemas(){
    +		return this.dataStreamSchemas;
    +	}
    +
    +	public boolean isStreamDefined(String streamId){
    +		return dataStreams.containsKey(streamId);
    +	}
    +
    +	public Map<String,Class<?>> getExtensions(){
    +		return this.extensions;
    +	}
    +
    +	public void checkStreamDefined(String streamId) throws UndefinedStreamException {
    +		if(!isStreamDefined(streamId)){
    +			throw new UndefinedStreamException("Stream (streamId: "+streamId+") not defined");
    +		}
    +	}
    +
    +	public SiddhiCEP(StreamExecutionEnvironment streamExecutionEnvironment) {
    +		this.executionEnvironment = streamExecutionEnvironment;
    +		this.dataStreams = new HashMap<>();
    +		this.dataStreamSchemas = new HashMap<>();
    +	}
    +
    +	public static <T> SiddhiStream.SingleSiddhiStream<T> define(String streamId,
DataStream<T> inStream, String... fieldNames) {
    +		SiddhiCEP environment = SiddhiCEP.getSiddhiEnvironment(inStream.getExecutionEnvironment());
    +		return environment.from(streamId,inStream,fieldNames);
    +	}
    +
    +	public <T> SiddhiStream.SingleSiddhiStream<T> from(String streamId, DataStream<T>
inStream, String... fieldNames){
    +		this.registerStream(streamId,inStream,fieldNames);
    +		return new SiddhiStream.SingleSiddhiStream<>(streamId, this);
    +	}
    +
    +	public <T> SiddhiStream.SingleSiddhiStream<T> from(String streamId){
    +		return new SiddhiStream.SingleSiddhiStream<>(streamId, this);
    +	}
    +
    +	public <T> SiddhiStream.UnionSiddhiStream<T> union(String firstStreamId,String
... unionStreamIds){
    +		return new SiddhiStream.SingleSiddhiStream<T>(firstStreamId,this).union(unionStreamIds);
    +	}
    +
    +	public  <T> void registerStream(final String streamId, DataStream<T> dataStream,
String... fieldNames) {
    +		if (isStreamDefined(streamId)) {
    +			throw new DuplicatedStreamException("Input stream: " + streamId + " already exists");
    +		}
    +		dataStreams.put(streamId, dataStream);
    +		SiddhiStreamSchema<T> schema = new SiddhiStreamSchema<>(dataStream.getType(),
fieldNames);
    +		schema.setTypeSerializer(schema.getTypeInfo().createSerializer(dataStream.getExecutionConfig()));
    +		dataStreamSchemas.put(streamId, schema);
    +	}
    +
    +	public StreamExecutionEnvironment getExecutionEnvironment() {
    +		return executionEnvironment;
    +	}
    +
    +	public void registerExtension(String extensionName, Class<?> extensionClass) {
    +		if(extensions.containsKey(extensionName)){
    --- End diff --
    
    not formatted code, put space after if and before {


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