Github user mushketyk commented on a diff in the pull request:
https://github.com/apache/flink/pull/2487#discussion_r78447005
--- Diff:
flink-contrib/flink-siddhi/src/main/java/org/apache/flink/contrib/siddhi/operator/AbstractSiddhiOperator.java
---
@@ -0,0 +1,265 @@
+/*
+ * 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.operator;
+
+import org.apache.flink.api.common.ExecutionConfig;
+import org.apache.flink.contrib.siddhi.exception.UndefinedStreamException;
+import org.apache.flink.contrib.siddhi.schema.StreamSchema;
+import org.apache.flink.core.fs.FSDataInputStream;
+import org.apache.flink.core.fs.FSDataOutputStream;
+import org.apache.flink.core.memory.DataInputView;
+import org.apache.flink.core.memory.DataInputViewStreamWrapper;
+import org.apache.flink.core.memory.DataOutputView;
+import org.apache.flink.core.memory.DataOutputViewStreamWrapper;
+import org.apache.flink.streaming.api.TimeCharacteristic;
+import org.apache.flink.streaming.api.graph.StreamConfig;
+import org.apache.flink.streaming.api.operators.AbstractStreamOperator;
+import org.apache.flink.streaming.api.operators.OneInputStreamOperator;
+import org.apache.flink.streaming.api.operators.Output;
+import org.apache.flink.streaming.api.watermark.Watermark;
+import
org.apache.flink.streaming.runtime.streamrecord.MultiplexingStreamRecordSerializer;
+import org.apache.flink.streaming.runtime.streamrecord.StreamRecord;
+import org.apache.flink.streaming.runtime.tasks.StreamTask;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.wso2.siddhi.core.ExecutionPlanRuntime;
+import org.wso2.siddhi.core.SiddhiManager;
+import org.wso2.siddhi.core.stream.input.InputHandler;
+import org.wso2.siddhi.query.api.definition.AbstractDefinition;
+
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.PriorityQueue;
+
+public abstract class AbstractSiddhiOperator<IN, OUT> extends
AbstractStreamOperator<OUT> implements OneInputStreamOperator<IN, OUT> {
+ private static final Logger LOGGER =
LoggerFactory.getLogger(AbstractSiddhiOperator.class);
+ private static final int INITIAL_PRIORITY_QUEUE_CAPACITY = 11;
+
+ private final SiddhiOperatorContext siddhiPlan;
+ private final String executionExpression;
+ private final boolean isProcessingTime;
+ private final Map<String, MultiplexingStreamRecordSerializer<IN>>
streamRecordSerializers;
+
+ private transient SiddhiManager siddhiManager;
+ private transient ExecutionPlanRuntime siddhiRuntime;
+ private transient Map<String, InputHandler> inputStreamHandlers;
+
+ // queue to buffer out of order stream records
+ private transient PriorityQueue<StreamRecord<IN>> priorityQueue;
+
+ /**
+ * @param siddhiPlan Siddhi CEP Execution Plan
+ */
+ public AbstractSiddhiOperator(SiddhiOperatorContext siddhiPlan) {
+ validate(siddhiPlan);
+ this.executionExpression = siddhiPlan.getFinalExecutionPlan();
+ this.siddhiPlan = siddhiPlan;
+ this.isProcessingTime = this.siddhiPlan.getTimeCharacteristic()
== TimeCharacteristic.ProcessingTime;
+ this.streamRecordSerializers = new HashMap<>();
+
+ for (String streamId : this.siddhiPlan.getInputStreams()) {
--- End diff --
This can be moved into a separate method.
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