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EventCountJobLegacy.java
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EventCountJobLegacy.java
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package com.dataartisans.queryablestatedemo;
/*
* 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.
*/
import org.apache.flink.api.common.JobExecutionResult;
import org.apache.flink.api.common.state.FoldingStateDescriptor;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
public class EventCountJobLegacy {
public static final int RPC_PORT = 6124;
public static final int PARALLELISM = 4;
public static final String QUERY_STATE_NAME = "itemCounts";
/**
* Main class.
*
* @param args the arguments
* @throws Exception if any Exception occurs
*/
public static void main(String[] args) throws Exception {
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
env.addSource(new BumpEventGeneratorSource(true))//
.keyBy(BumpEvent::getItemId)//
.asQueryableState(QUERY_STATE_NAME, getStateDesc());
final JobExecutionResult jobGraph = env.execute("EventCountJob");
System.out.println("[info] Job ID: " + jobGraph.getJobID());
System.out.println();
}
/**
* Return the FoldingStateDescriptor descriptor.
*
* @return the FoldingStateDescriptor descriptor.
*/
public static FoldingStateDescriptor<BumpEvent, Long> getStateDesc() {
return new FoldingStateDescriptor<>("itemCounts", //
0L, // Initial value is 0
(acc, event) -> acc + 1L, // Increment for each event
Long.class);
}
}