/*
* Copyright 2014 Peter Lawrey
*
* 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 net.openhft.collections.ipc;
import net.openhft.collections.SharedHashMap;
import net.openhft.collections.SharedHashMapBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
/**
*
*/
public class StateMachineTutorial {
private static final Logger LOGGER = LoggerFactory.getLogger(StateMachineTutorial.class);
// *************************************************************************
//
// *************************************************************************
public static void main(String[] args) throws Exception{
SharedHashMap<Integer, StateMachineData> map = null;
try {
File dataFile = new File(System.getProperty("java.io.tmpdir"),"hft-state-machine");
map = new SharedHashMapBuilder()
.entries(8).file(dataFile).kClass(Integer.class).vClass(StateMachineData.class).create();
if(args.length > 0) {
if("0".equalsIgnoreCase(args[0])) {
StateMachineData smd =
map.acquireUsing(0, new StateMachineData());
StateMachineState st = smd.getState();
if(st == StateMachineState.STATE_0) {
long start = System.nanoTime();
//fire the first state change
smd.setStateData(0);
smd.setState(StateMachineState.STATE_0, StateMachineState.STATE_1);
while(!smd.done()) {
// busy wait
}
long end = System.nanoTime();
LOGGER.info("Took {} us for 100 transiction",(end - start) / 1E3);
}
} else if("1".equalsIgnoreCase(args[0])) {
StateMachineProcessor.runProcessor(
map.acquireUsing(0,new StateMachineData()),
StateMachineState.STATE_1,
StateMachineState.STATE_1_WORKING,
StateMachineState.STATE_2);
} else if("2".equalsIgnoreCase(args[0])) {
StateMachineProcessor.runProcessor(
map.acquireUsing(0,new StateMachineData()),
StateMachineState.STATE_2,
StateMachineState.STATE_2_WORKING,
StateMachineState.STATE_3);
} else if("3".equalsIgnoreCase(args[0])) {
StateMachineProcessor.runProcessor(
map.acquireUsing(0,new StateMachineData()),
StateMachineState.STATE_3,
StateMachineState.STATE_3_WORKING,
StateMachineState.STATE_1);
} else if("clean".equalsIgnoreCase(args[0])){
LOGGER.info("deleting {}",dataFile.getAbsolutePath());
dataFile.delete();
}
}
} finally {
if(map != null) {
map.close();
}
}
}
}