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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>15.6. Cache</title><link rel="stylesheet" type="text/css" href="/docbook.css" /><meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /><link rel="home" href="index.html" title="Netkiller Java 手札" /><link rel="up" href="sdk.html" title="第 15 章 Software Development Kit" /><link rel="prev" href="openfire.html" title="15.5. Openfire" /><link rel="next" href="ch15s07.html" title="15.7. Redisson" /></head><body><a xmlns="" href="http://www.netkiller.cn/">Home</a> |
<a xmlns="" href="http://netkiller.github.io/">简体中文</a> |
<a xmlns="" href="http://netkiller.sourceforge.net/">繁体中文</a> |
<a xmlns="" href="/journal/index.html">杂文</a> |
<a xmlns="" href="/search.html">Search</a> |
<a xmlns="" href="http://netkiller-github-com.iteye.com/">ITEYE 博客</a> |
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<a xmlns="" href="https://www.facebook.com/bg7nyt">Facebook</a> |
<a xmlns="" href="http://cn.linkedin.com/in/netkiller/">Linkedin</a> |
<a xmlns="" href="https://zb.oschina.net/profile/725072/market">作品与服务</a> |
<a xmlns="" href="mailto:netkiller@msn.com">Email</a><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">15.6. Cache</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="openfire.html">上一页</a> </td><th width="60%" align="center">第 15 章 Software Development Kit</th><td width="20%" align="right"> <a accesskey="n" href="ch15s07.html">下一页</a></td></tr></table><hr /></div><table xmlns=""><tr><td><iframe src="http://ghbtns.com/github-btn.html?user=netkiller&repo=netkiller.github.io&type=watch&count=true&size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="http://ghbtns.com/github-btn.html?user=netkiller&repo=netkiller.github.io&type=fork&count=true&size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="http://ghbtns.com/github-btn.html?user=netkiller&type=follow&count=true&size=large" height="30" width="240" frameborder="0" scrolling="0" style="width:240px; height: 30px;" allowTransparency="true"></iframe></td></tr></table><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="cache"></a>15.6. Cache</h2></div></div></div>
<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="memcache"></a>15.6.1. java memcached client</h3></div></div></div>
<pre class="screen">
wget http://img.whalin.com/memcached/jdk6/log4j/java_memcached-release_1.5.1.tar.gz
tar zxvf java_memcached-release_1.5.1.tar.gz
cd java_memcached-release_1.5.1
cp java_memcached-release_1.5.1.jar /usr/local/memcached/api/java
</pre>
<p>export CLASSPATH="./:/usr/local/java/lib:/usr/local/java/jre/lib:/usr/local/memcached/api/java/java_memcached-release_1.5.1.jar:/usr/local/memcached/api/java/log4j-1.2.14.jar"</p>
<div class="example"><a id="idm45656223158512"></a><p class="title"><strong>例 15.1. memcached.java</strong></p><div class="example-contents">
<pre class="screen">
import com.danga.MemCached.*;
import org.apache.log4j.*;
public class memcached {
public static void main(String[] args) {
try{
BasicConfigurator.configure();
String[] serverlist = { "127.0.0.1:11211" };
// initialize the pool for memcache servers
SockIOPool pool = SockIOPool.getInstance( "test" );
pool.setServers( serverlist );
pool.setInitConn( 10 );
pool.setMinConn( 5 );
pool.setMaxConn( 250 );
pool.setMaintSleep( 30 );
pool.setNagle( false );
pool.setSocketTO( 3000 );
pool.initialize();
MemCachedClient mc = new MemCachedClient();
// compression is enabled by default
mc.setCompressEnable(true);
// set compression threshhold to 4 KB (default: 15 KB)
mc.setCompressThreshold(4096);
// turn on storing primitive types as a string representation
// Should not do this in most cases.
mc.setPrimitiveAsString(true);
mc.setPoolName( "test" );
for ( int i = 0; i < 10; i++ ) {
boolean success = mc.set( "" + i, "Hello!" );
String result = (String)mc.get( "" + i );
System.out.println( String.format( "set( %d ): %s", i, success ) );
System.out.println( String.format( "get( %d ): %s", i, result ) );
}
System.out.println( "\n\t -- sleeping --\n" );
try { Thread.sleep( 10000 ); } catch ( Exception ex ) { }
for ( int i = 0; i < 10; i++ ) {
boolean success = mc.set( "" + i, "Hello!" );
String result = (String)mc.get( "" + i );
System.out.println( String.format( "set( %d ): %s", i, success ) );
System.out.println( String.format( "get( %d ): %s", i, result ) );
}
}
catch (Exception e)
{
System.out.println("[Exception] - " + e.toString());
}
finally {}
}
}
</pre>
<p>test memcache</p>
<pre class="screen">
javac memcached.java
java memcached
</pre>
</div></div><br class="example-break" />
</div>
<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="idm45656223154448"></a>15.6.2. Jedis</h3></div></div></div>
<p></p>
<pre class="programlisting">
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.7.2</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
</pre>
<pre class="programlisting">
package cn.netkiller.redis;
import redis.clients.jedis.Jedis;
public class JedisTest {
private static Jedis jedis;
public static void main(String[] args) {
jedis = new Jedis("192.168.2.1");
System.out.println("Server is running: "+jedis.ping());
jedis.set("foo", "bar");
String value = jedis.get("foo");
System.out.println(value);
}
}
</pre>
<div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="idm45656223151552"></a>15.6.2.1. 认证</h4></div></div></div>
<pre class="programlisting">
jedis = new Jedis("localhost", 6379, 15000);
jedis.auth("foobared");
</pre>
<pre class="screen">
</pre>
</div>
<div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="idm45656223149792"></a>15.6.2.2. jedis.keys</h4></div></div></div>
<pre class="programlisting">
public Map<String, String> getCaptcha() {
Map<String, String> captchas = new HashMap<String, String>();
this.jedis = new Jedis(this.config.getProperty("captcha.redis"));
System.out.printf("%s: Redis server is running %s\n", this.getClass().getName(), this.jedis.ping());
Set<String> keys = jedis.keys("captcha::phone::*");
if (!keys.isEmpty()) {
for(String key:keys){
if (this.jedis.exists(key)) {
captchas.put(key.replace("captcha::phone::", ""), this.jedis.get(key)+" ["+ String.valueOf(this.jedis.ttl(key)) + "s]");
}
}
}
this.jedis.close();
return captchas;
}
</pre>
<pre class="programlisting">
import redis.clients.jedis.Jedis;
public class RedisKeys {
public static void main(String[] args) {
Jedis jedis = new Jedis("localhost");
System.out.println("Connection to server sucessfully");
List<String> list = jedis.keys("*");
for(int i=0; i<list.size(); i++) {
System.out.println("List of stored keys:: "+list.get(i));
}
}
}
</pre>
<pre class="screen">
</pre>
</div>
</div>
<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="ehcache"></a>15.6.3. Ehcache</h3></div></div></div>
</div>
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