/*
* Copyright (C) 2014 Cetsoft, http://www.cetsoft.com
*
* 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.
*
* Author : Yusuf Aytas
* Date : May 20, 2014
*/
package com.cetsoft.imcache.examples;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import com.cetsoft.imcache.cache.Cache;
import com.cetsoft.imcache.cache.SimpleItem;
import com.cetsoft.imcache.cache.VersionedItem;
import com.cetsoft.imcache.cache.builder.CacheBuilder;
import com.cetsoft.imcache.cache.offheap.StaleItemException;
import com.cetsoft.imcache.cache.offheap.bytebuffer.OffHeapByteBufferStore;
/**
* The Class VersionedOffHeapCacheExample.
*/
public class VersionedOffHeapCacheExample {
/**
* The main method.
*
* @param args the arguments
*/
public static void main(String[] args) {
OffHeapByteBufferStore bufferStore = new OffHeapByteBufferStore(10000, 10);
final Cache<String, VersionedItem<String>> cache = CacheBuilder.versionedOffHeapCache().storage(bufferStore)
.build();
ExecutorService service = Executors.newFixedThreadPool(3);
for (int i = 0; i < 100000; i++) {
service.execute(new Runnable() {
public void run() {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
while (true) {
try {
VersionedItem<String> value = cache.get("apple");
String newValue = getRandomString();
if (value == null) {
cache.put("apple", new SimpleItem<String>(newValue));
} else {
value.update(newValue);
cache.put("apple", value);
}
System.out.println(value.getValue());
break;
} catch (StaleItemException ex) {
ex.printStackTrace();
}
}
VersionedItem<String> item = cache.get("apple");
System.out.println(item.getVersion());
}
});
}
}
/**
* Gets the random string.
*
* @return the random string
*/
private static String getRandomString() {
char[] chars = new char[5];
for (int i = 0; i < chars.length; i++) {
chars[i] = (char) (Math.random() * 25 + 65);
}
return new String(chars);
}
}