com.hazelcast.jet.examples.grpc.EventGenerator Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2020, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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.
*/
package com.hazelcast.jet.examples.grpc;
import com.hazelcast.jet.examples.grpc.datamodel.Trade;
import com.hazelcast.map.IMap;
import java.util.Random;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.locks.LockSupport;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
public class EventGenerator extends Thread {
private static final int PRODUCT_ID_BASE = 31;
private static final int BROKER_ID_BASE = 21;
private static final int PRODUCT_BROKER_COUNT = 4;
private volatile boolean enabled;
private volatile boolean keepRunning = true;
private final IMap trades;
EventGenerator(IMap trades) {
this.trades = trades;
}
@Override
public void run() {
Random rnd = ThreadLocalRandom.current();
int tradeId = 1;
while (keepRunning) {
LockSupport.parkNanos(MILLISECONDS.toNanos(50));
if (!enabled) {
continue;
}
Trade trad = new Trade(tradeId,
PRODUCT_ID_BASE + rnd.nextInt(PRODUCT_BROKER_COUNT),
BROKER_ID_BASE + rnd.nextInt(PRODUCT_BROKER_COUNT));
trades.put(42, trad);
tradeId++;
}
}
void generateEventsForFiveSeconds() throws InterruptedException {
enabled = true;
System.out.println("\nGenerating trade events\n");
Thread.sleep(5000);
System.out.println("\nStopped trade events\n");
enabled = false;
}
void shutdown() {
keepRunning = false;
}
}