xmemcached学习笔记
2015-10-15 14:51
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源码:http://www.boyunjian.com/javasrc/com.googlecode.xmemcached
/xmemcached/1.4.3/_/net/rubyeye/
xmemcached/impl/MemcachedConnector.java
分类: Java2012-04-18
18:37 4110人阅读 评论(0) 收藏 举报
memcachedthreadjavastringserverimport
XMemcached 学习整理
1、首先要把server 启动:对应到相应的目录下memcached.exe –start
2、依赖slf4j.jar包,下载slf4j 把D:\library\slf4j-1.5.5\slf4j-simple-1.5.5.jar
和D:\library\slf4j-1.5.5\slf4j-simple-1.5.5.jar放在classpath路径下
3、Memcache第一次会把数据放在内存当中,每次执行的时候如果数据没有变就不更新,直接从内存当中取。
4、如果server停掉,存在内存中的数据会消失
5、替换键对应的数值
Replace(“key”,”value”);
Java代码
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MemcachedClientBuilder builder = newXMemcachedClientBuilder(AddrUtil.getAddresses("10.180.44.224:11211
zhouxq:11211"),new int[]{1,3});
[java] view
plaincopy
MemcachedClientBuilder builder = new XMemcachedClientBuilder(AddrUtil.getAddresses("10.180.44.224:11211 zhouxq:11211"),new int[]{1,3});
MemcachedClientBuilder 5个构造方法
构造方法
XMemcachedClientBuilder(List/Map address,int[] weight)
Address 可以是:
Java代码
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java.util.Map<java.net.InetSocketAddress,java.net.InetSocketAddress> addressMap
java.util.List<java.net.InetSocketAddress> addressList
[java] view
plaincopy
java.util.Map<java.net.InetSocketAddress,java.net.InetSocketAddress> addressMap
java.util.List<java.net.InetSocketAddress> addressList
weight 与servers对应的节点的权重
weight 可以有也可无
weight 值大则权重大,否则小
XMemcached允许通过设置节点的权重来调节memcached的负载,设置的权重越高,该memcached节点存储的数据将越多,所承受的负载越大。
xmemcached的权重是通过复制连接的多个引用来实现的,比如权重为3,那么就复制3个同一个连接的引用放在集合中让MemcachedSessionLocator查找。
改变节点权重,可以通过setServerWeight方法:
Java代码
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![](http://chitu11.iteye.com/images/icon_star.png)
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public void setServerWeight(String
server, int weight);
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plaincopy
public void setServerWeight(String server, int weight);
传入一个int数组,里面的元素就是节点对应的权重值,比如这里设置"10.180.44.224:1121"节点的权重为1,而"zhouxq:11211"的权重为3。
类似的XMemcachedClient()和XMemcachedClientBuilder相同
设置连接池大小
Java代码
![](http://chitu11.iteye.com/images/icon_copy.gif)
![](http://chitu11.iteye.com/images/icon_star.png)
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builder.setConnectionPoolSize(5);
[java] view
plaincopy
builder.setConnectionPoolSize(5);
连接池通常不建议设置太大,我推荐在0-30之间为好,太大则浪费系统资源,太小无法达到分担负载的目的。
设置失败模式 如果服务出现down的情况,会报出异常,直到服务正常
Java代码
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![](http://chitu11.iteye.com/images/icon_star.png)
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builder.setFailureMode(true);
[java] view
plaincopy
builder.setFailureMode(true);
使用二进制文件
Java代码
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builder.setCommandFactory(new BinaryCommandFactory());
[java] view
plaincopy
builder.setCommandFactory(new BinaryCommandFactory());
7、
存储数据是通过set方法,它有三个参数,第一个是存储的key名称,第二个是expire时间(单位秒),超过这个时间,memcached将这个数据替换出去,0表示永久存储(默认是一个月),第三个参数就是实际存储的数据,可以是任意的java可序列化类型。
Java代码
![](http://chitu11.iteye.com/images/icon_copy.gif)
![](http://chitu11.iteye.com/images/icon_star.png)
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Thread t = new Thread();
t.start();
t.sleep(3000);
//从memcached获取key对应的value,操作超时3秒
[java] view
plaincopy
Thread t = new Thread();
t.start();
t.sleep(3000);
//从memcached获取key对应的value,操作超时3秒
someObject=memcachedClient.get("key",3000);后面的对应的是毫秒
超时后得到的key对应的值为null
8、与Spring框架集成
通过XMemcachedClientFactoryBean类,即可与spring框架集成
测试代码
Java代码
![](http://chitu11.iteye.com/images/icon_copy.gif)
![](http://chitu11.iteye.com/images/icon_star.png)
![](http://chitu11.iteye.com/images/spinner.gif)
package com.test.xmemcache;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
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 XmemcacheTest
{
/**
* @param args
*/
public static void main(String[]
args) {
// TODO Auto-generated method stub
MemcachedClientBuilder builder = newXMemcachedClientBuilder(AddrUtil.getAddresses("10.180.44.224:11211
zhouxq:11211"),new int[]{1,3});
try {
MemcachedClient memcachedClient = builder.build();
memcachedClient.set("hello", 1, "Hello,xmemcached");
String Value=memcachedClient.get("hello",3000); //
System.out.println("hello=" +
Value);
// memcachedClient.flushAll();
memcachedClient.replace("hello",1, "zhouxq");
System.out.println(memcachedClient.get("hello"));
// memcachedClient.deleteWithNoReply("hello");
//删除
System.out.println(memcachedClient.get("hello"));
// memcachedClient.delete("hello"); //删除
// Value = memcachedClient.get("hello");
// System.out.println("hello=" + Value);
memcachedClient.set("key",2,"someObject");
//从memcached获取key对应的value
Object someObject=memcachedClient.get("key");
Thread t = new Thread();
t.start();
t.sleep(1000);
//从memcached获取key对应的value,操作超时3秒
someObject=memcachedClient.get("key",1000);
System.out.println(someObject);
memcachedClient.shutdown();
} catch (MemcachedException
ex) {
System.err.println("MemcachedClient operation fail");
ex.printStackTrace();
} catch (TimeoutException
xe) {
System.err.println("MemcachedClient operation timeout");
xe.printStackTrace();
} catch (InterruptedException
e) {
// ignore
} catch (IOException
e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
/xmemcached/1.4.3/_/net/rubyeye/
xmemcached/impl/MemcachedConnector.java
分类: Java2012-04-18
18:37 4110人阅读 评论(0) 收藏 举报
memcachedthreadjavastringserverimport
XMemcached 学习整理
1、首先要把server 启动:对应到相应的目录下memcached.exe –start
2、依赖slf4j.jar包,下载slf4j 把D:\library\slf4j-1.5.5\slf4j-simple-1.5.5.jar
和D:\library\slf4j-1.5.5\slf4j-simple-1.5.5.jar放在classpath路径下
3、Memcache第一次会把数据放在内存当中,每次执行的时候如果数据没有变就不更新,直接从内存当中取。
4、如果server停掉,存在内存中的数据会消失
5、替换键对应的数值
Replace(“key”,”value”);
Java代码
![](http://chitu11.iteye.com/images/icon_copy.gif)
![](http://chitu11.iteye.com/images/icon_star.png)
![](http://chitu11.iteye.com/images/spinner.gif)
MemcachedClientBuilder builder = newXMemcachedClientBuilder(AddrUtil.getAddresses("10.180.44.224:11211
zhouxq:11211"),new int[]{1,3});
[java] view
plaincopy
MemcachedClientBuilder builder = new XMemcachedClientBuilder(AddrUtil.getAddresses("10.180.44.224:11211 zhouxq:11211"),new int[]{1,3});
MemcachedClientBuilder 5个构造方法
构造方法
XMemcachedClientBuilder(List/Map address,int[] weight)
Address 可以是:
Java代码
![](http://chitu11.iteye.com/images/icon_copy.gif)
![](http://chitu11.iteye.com/images/icon_star.png)
![](http://chitu11.iteye.com/images/spinner.gif)
java.util.Map<java.net.InetSocketAddress,java.net.InetSocketAddress> addressMap
java.util.List<java.net.InetSocketAddress> addressList
[java] view
plaincopy
java.util.Map<java.net.InetSocketAddress,java.net.InetSocketAddress> addressMap
java.util.List<java.net.InetSocketAddress> addressList
weight 与servers对应的节点的权重
weight 可以有也可无
weight 值大则权重大,否则小
XMemcached允许通过设置节点的权重来调节memcached的负载,设置的权重越高,该memcached节点存储的数据将越多,所承受的负载越大。
xmemcached的权重是通过复制连接的多个引用来实现的,比如权重为3,那么就复制3个同一个连接的引用放在集合中让MemcachedSessionLocator查找。
改变节点权重,可以通过setServerWeight方法:
Java代码
![](http://chitu11.iteye.com/images/icon_copy.gif)
![](http://chitu11.iteye.com/images/icon_star.png)
![](http://chitu11.iteye.com/images/spinner.gif)
public void setServerWeight(String
server, int weight);
[java] view
plaincopy
public void setServerWeight(String server, int weight);
传入一个int数组,里面的元素就是节点对应的权重值,比如这里设置"10.180.44.224:1121"节点的权重为1,而"zhouxq:11211"的权重为3。
类似的XMemcachedClient()和XMemcachedClientBuilder相同
设置连接池大小
Java代码
![](http://chitu11.iteye.com/images/icon_copy.gif)
![](http://chitu11.iteye.com/images/icon_star.png)
![](http://chitu11.iteye.com/images/spinner.gif)
builder.setConnectionPoolSize(5);
[java] view
plaincopy
builder.setConnectionPoolSize(5);
连接池通常不建议设置太大,我推荐在0-30之间为好,太大则浪费系统资源,太小无法达到分担负载的目的。
设置失败模式 如果服务出现down的情况,会报出异常,直到服务正常
Java代码
![](http://chitu11.iteye.com/images/icon_copy.gif)
![](http://chitu11.iteye.com/images/icon_star.png)
![](http://chitu11.iteye.com/images/spinner.gif)
builder.setFailureMode(true);
[java] view
plaincopy
builder.setFailureMode(true);
使用二进制文件
Java代码
![](http://chitu11.iteye.com/images/icon_copy.gif)
![](http://chitu11.iteye.com/images/icon_star.png)
![](http://chitu11.iteye.com/images/spinner.gif)
builder.setCommandFactory(new BinaryCommandFactory());
[java] view
plaincopy
builder.setCommandFactory(new BinaryCommandFactory());
7、
存储数据是通过set方法,它有三个参数,第一个是存储的key名称,第二个是expire时间(单位秒),超过这个时间,memcached将这个数据替换出去,0表示永久存储(默认是一个月),第三个参数就是实际存储的数据,可以是任意的java可序列化类型。
Java代码
![](http://chitu11.iteye.com/images/icon_copy.gif)
![](http://chitu11.iteye.com/images/icon_star.png)
![](http://chitu11.iteye.com/images/spinner.gif)
Thread t = new Thread();
t.start();
t.sleep(3000);
//从memcached获取key对应的value,操作超时3秒
[java] view
plaincopy
Thread t = new Thread();
t.start();
t.sleep(3000);
//从memcached获取key对应的value,操作超时3秒
someObject=memcachedClient.get("key",3000);后面的对应的是毫秒
超时后得到的key对应的值为null
8、与Spring框架集成
通过XMemcachedClientFactoryBean类,即可与spring框架集成
测试代码
Java代码
![](http://chitu11.iteye.com/images/icon_copy.gif)
![](http://chitu11.iteye.com/images/icon_star.png)
![](http://chitu11.iteye.com/images/spinner.gif)
package com.test.xmemcache;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
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 XmemcacheTest
{
/**
* @param args
*/
public static void main(String[]
args) {
// TODO Auto-generated method stub
MemcachedClientBuilder builder = newXMemcachedClientBuilder(AddrUtil.getAddresses("10.180.44.224:11211
zhouxq:11211"),new int[]{1,3});
try {
MemcachedClient memcachedClient = builder.build();
memcachedClient.set("hello", 1, "Hello,xmemcached");
String Value=memcachedClient.get("hello",3000); //
System.out.println("hello=" +
Value);
// memcachedClient.flushAll();
memcachedClient.replace("hello",1, "zhouxq");
System.out.println(memcachedClient.get("hello"));
// memcachedClient.deleteWithNoReply("hello");
//删除
System.out.println(memcachedClient.get("hello"));
// memcachedClient.delete("hello"); //删除
// Value = memcachedClient.get("hello");
// System.out.println("hello=" + Value);
memcachedClient.set("key",2,"someObject");
//从memcached获取key对应的value
Object someObject=memcachedClient.get("key");
Thread t = new Thread();
t.start();
t.sleep(1000);
//从memcached获取key对应的value,操作超时3秒
someObject=memcachedClient.get("key",1000);
System.out.println(someObject);
memcachedClient.shutdown();
} catch (MemcachedException
ex) {
System.err.println("MemcachedClient operation fail");
ex.printStackTrace();
} catch (TimeoutException
xe) {
System.err.println("MemcachedClient operation timeout");
xe.printStackTrace();
} catch (InterruptedException
e) {
// ignore
} catch (IOException
e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
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