memcached-java客户端xmemcached简单使用
1. 前一篇文章简单说了下如何安装memcached，想到了memcached是分布式的缓存框架，所以自己在公司的3台测试机上安装了下。2. 关于什么是xmemcached就不多说了，其实就是实现了memcached的java客户端，关于分布式下一篇会稍微详细点介绍，这里只要知道这个分布式其实是客户端的分布式，其实是没有主从节点的概念的。
3. 直接贴代码，看看如何使用
import java.io.IOException;
import java.util.concurrent.TimeoutException;
import net.rubyeye.xmemcached.CASOperation;
import net.rubyeye.xmemcached.MemcachedClient;
import net.rubyeye.xmemcached.MemcachedClientBuilder;
import net.rubyeye.xmemcached.XMemcachedClientBuilder;
import net.rubyeye.xmemcached.exception.MemcachedException;
import net.rubyeye.xmemcached.utils.AddrUtil;
public class Cache {
private MemcachedClientBuilder builder = null;
private MemcachedClient client = null;
public Cache(String address, int[] weight) {
builder = new XMemcachedClientBuilder(AddrUtil.getAddresses(address), weight);
builder.setConnectionPoolSize(5);
try {
client = builder.build();
} catch (IOException e) {
e.printStackTrace();
}
}
public void set(String key, int exp, Object value) {
try {
if (!client.set(key, exp, value)) {
System.err.println("set error, key is " + key + " value is " + value);
}
} catch (TimeoutException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (MemcachedException e) {
e.printStackTrace();
}
}
public void delete(String key) {
try {
client.delete(key);
} catch (TimeoutException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (MemcachedException e) {
e.printStackTrace();
}
}
public void update(String key, final Object value) {
try {
client.cas(key, 10, new CASOperation<Object>() {
public int getMaxTries() {
return 1;
}
public Object getNewValue(long currentCAS, Object currentValue) {
return value;
}
});
} catch (TimeoutException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (MemcachedException e) {
e.printStackTrace();
}
}
public Object get(String key) {
try {
return client.get(key);
} catch (TimeoutException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (MemcachedException e) {
e.printStackTrace();
}
return null;
}
public void addServer(String server, int port, int weight) {
try {
client.addServer(server, port, weight);
} catch (IOException e) {
e.printStackTrace();
}
}
public void removeServer(String hostList) {
client.removeServer(hostList);
}
}
这个类做了一个特别简单的封装，包括了增删改查还有动态添加删除节点，其实就是简单得使用了下api，其实api很多，大家可以自己查api
下面是一个测试类
public static void main(String[] args) {
//testCRUD();
testSerObject();
}
public static void testCRUD() {
String address = "xx01:11211 xx02:11211 xx03:11211";
Cache cache = new Cache(address, new int[] { 1, 1, 1 });
cache.set("hello", 10, "test");
System.out.println(cache.get("hello"));
cache.update("hello", "ssss");
System.out.println(cache.get("hello"));
cache.delete("hello");
System.out.println(cache.get("hello"));
}
public static void testSerObject() {
String address = "arreat00:11211 arreat01:11211 arreat02:11211";
Cache cache = new Cache(address, new int[] { 1, 1, 1 });
User user = new User();
user.setId(1);
user.setMobile("13564316073");
user.setEmail("qianjc@unionpaysmart.com");
user.setPasswd("ttt");
user.setUserName("qianjc");
List<String> asseat = new ArrayList<String>();
asseat.add("asseat0");
asseat.add("asseat1");
Map<String, String> car = new HashMap<String, String>();
car.put("car1", "val1");
car.put("car2", "val2");
user.setAsseat(asseat);
user.setCar(car);
user.setBook(buildBook(1, "memcached进阶", "smart出版"));
user.setBooks(buildBooks());
//cache.set("user1", 0, user);
System.out.println(cache.get("user1"));
}
public static Book buildBook(int id, String name, String pulish) {
Book book = new Book();
book.setId(id);
book.setName(name);
book.setPulish(pulish);
return book;
}
public static List<Book> buildBooks() {
List<Book> books = new ArrayList<Book>();
for (int i = 0; i < 2; ++i) {
books.add(buildBook(i, "memcached进阶" + i, "smart出版" + i));
}
return books;
}
}可以看到memcached不仅仅支持简单String,int等类型，只要实现了Serializable接口的java序列化对象都可以
具体怎么使用可以查api，还是比较简单的！！
也可以参考一篇博客：http://blog.iyunv.com/ljhabc1982/article/details/6338898
版权声明：本文为博主原创文章，未经博主允许不得转载。
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