TestConcurrentLinkedHashMap.java

package test.utils.collection;

import static org.hamcrest.Matchers.is;

import org.junit.Assert;
import org.junit.Test;

import com.firefly.utils.collection.ConcurrentLinkedHashMap;
import com.firefly.utils.collection.ConcurrentLinkedHashMap.MapEventListener;

public class TestConcurrentLinkedHashMap {
	static MapEventListener<String, String> listener = new MapEventListener<String, String>() {

		@Override
		public String onRemoveEntry(String key, String value) {
			return value;
		}

		@Override
		public String onGetEntry(String key, String value) {
			return value;
		}

		@Override
		public String onPutEntry(String key, String value, String previousValue) {
			return previousValue;
		}

		@Override
		public boolean onEliminateEntry(String key, String value) {
//			System.out.println(key + "|" + value);
			return true;
		}
	};
	
	@Test
	public void testMaxEntries() {
		
		ConcurrentLinkedHashMap<String, String> map = new ConcurrentLinkedHashMap<String, String>(true, 33, listener);
		System.out.println(map.getConcurrencyLevel() + "|" + map.getSegmentMask() + "|" + map.getSegmentShift());
		for (int i = 0; i < 100; i++) {
			map.put("" + i, "v" + i);
		}
		System.out.println(map.size());
		Assert.assertThat(map.size(), is(32));
		
	}
	
	@Test
	public void testLeastRecentlyUsed() {
		ConcurrentLinkedHashMap<String, String> map = new ConcurrentLinkedHashMap<String, String>(true, 33, listener);
		System.out.println(map.getConcurrencyLevel() + "|" + map.getSegmentMask() + "|" + map.getSegmentShift());
		for (int i = 0; i < 100; i++) {
			if(i > 75)
				map.get("75");
			map.put("" + i, "v" + i);
		}
		Assert.assertThat(map.get("75"), is("v75"));
	}
	
	@Test
	public void testConcurrentLevel() {
		ConcurrentLinkedHashMap<String, String> map = new ConcurrentLinkedHashMap<String, String>(true, 200, listener, 200);
		Assert.assertThat(map.getConcurrencyLevel(), is(256));
	}
	
	public static void main(String[] args) {
		ConcurrentLinkedHashMap<String, String> map = new ConcurrentLinkedHashMap<String, String>(true, 33, listener);
		System.out.println(map.getConcurrencyLevel() + "|" + map.getSegmentMask() + "|" + map.getSegmentShift());
		for (int i = 0; i < 100; i++) {
			map.put("key" + i, "v" + i);
		}
		System.out.println(map.toString());
		for (int i = 0; i < 100; i++) {
			System.out.println(map.get("key" + i));
		}
		System.out.println(map.get("key97"));
		System.out.println(map.get("key97"));
		System.out.println(map.get("key97"));
		System.out.println(map.get("key97"));
		System.out.println(map.get("key97"));
	}
}