征服 Redis + Jedis + Spring （三）—— 列表操作

这里说明下，例如LPUSH，RPUSH，其实就是从左边压栈，还是从右边压栈的不同命令。可以把堆栈看作是一个从左至右的数组。如果左边压栈，右边出栈，那就是队列的入队/出队操作；如果左边压栈，左边出栈，那就是堆栈操作。

举个具体的例子：

队列操作：LPUSH入队，RPOP出队，同理，可把L|R替换。

堆栈操作：LPUSH压栈，LPOP出栈，同理，可把L|R替换。

下面进行测试用例，初始、结束时，分别做入队、出队操作，期间进行堆栈，队列操作。不用我细说了，看测试用例，很简单！

/**
 * Mar 5, 2013
 */
package org.zlex.redis;

import static org.junit.Assert.*;

import java.util.List;

import org.junit.Before;
import org.junit.After;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.zlex.redis.support.ListOps;

/**
 * 
 * @author snowolf
 * @version 1.0
 * @since 1.0
 */
public class ListOpsTest {
	private ApplicationContext app;
	private ListOps listOps;
	private String key = "queue";

	@Before
	public void before() throws Exception {
		app = new ClassPathXmlApplicationContext("applicationContext.xml");
		listOps = (ListOps) app.getBean("listOps");

		System.out.println("------------IN---------------");
		for (int i = 0; i < 5; i++) {
			String uid = "u" + i;
			System.out.println(uid);
			listOps.in(key, uid);
		}
	}

	@After
	public void after() {
		// ------------OUT---------------
		System.out.println("------------OUT---------------");
		long length = listOps.length(key);
		for (long i = 0; i < length; i++) {
			String uid = listOps.out(key);
			System.out.println(uid);
		}
	}

	@Test
	public void stack() {
		// ------------PUSH---------------
		String key = "stack";
		int len = 5;
		System.out.println("------------PUSH---------------");
		for (int i = 0; i < len; i++) {
			String uid = "u" + System.currentTimeMillis();
			System.out.println(uid);
			listOps.push(key, uid);
		}

		long length = listOps.length(key);
		assertEquals(len, length);

		// ------------POP---------------
		System.out.println("------------POP---------------");
		for (long i = 0; i < length; i++) {
			String uid = listOps.pop(key);
			System.out.println(uid);
		}
	}

	@Test
	public void index() {

		// -------------INDEX-------------
		String value = listOps.index(key, 3);
		assertEquals("u3", value);
	}

	@Test
	public void range() {
		// -------------RANGE-------------
		List<String> list = listOps.range(key, 3, 5);
		boolean result1 = list.contains("u3");
		assertEquals(true, result1);

		boolean result2 = list.contains("u1");
		assertEquals(false, result2);
	}

	@Test
	public void trim() {
		// ------------TRIM---------------
		List<String> list = listOps.range(key, 3, 5);
		listOps.trim(key, 3, 5);
		boolean result3 = list.contains("u1");
		assertEquals(false, result3);
	}

	@Test
	public void set() {
		// ------------SET-----------------
		List<String> list = listOps.range(key, 3, 5);
		listOps.set(key, 4, "ux4");
		boolean result4 = list.contains("u4");
		assertEquals(true, result4);

	}

	@Test
	public void remove() {
		// ------------REMOVE-----------------
		listOps.remove(key, 4, "u4");
		String value = listOps.index(key, 4);
		assertEquals(null, value);

	}
}