java memcached客户端，模糊查询/批量删除/查询所有的key

来源：互联网发布：数据可视化怎么做编辑：程序博客网时间：2024/06/05 16:57
package com.client;import java.util.ArrayList;import java.util.Date;import java.util.Iterator;import java.util.List;import java.util.Map;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import com.danga.MemCached.MemCachedClient;import com.danga.MemCached.SockIOPool;public class MemCacheCl {    private static final Logger LOG = LoggerFactory.getLogger(MemCacheCl.class);    public static final MemCachedClient mcc = new MemCachedClient();    static {        String ip = "127.0.0.1";        int port = 9005;        String server = ip + ":" + port;        LOG.info("Conn Memcache {}", server);        String[] servers = { server, };        Integer[] weights = { 3, 2 };        SockIOPool pool = SockIOPool.getInstance();        pool.setServers(servers);        pool.setWeights(weights);        pool.setNagle(false);        pool.setSocketTO(3000);        pool.setSocketConnectTO(0);        pool.initialize();    }    public String get(String key) {        String value = "";        try {            if (mcc.get(key) != null) {                value = mcc.get(key).toString();            }        } catch (Exception e) {            LOG.error("memcached get exception: " + key, e);        }        LOG.debug("GET: key:{}, value:{}", key, value);        return value;    }    public boolean delete(String key) {        try {            LOG.info("DEL: key:{}", key);            return mcc.delete(key);        } catch (Exception e) {            LOG.error("memcached delete exception: " + key, e);        }        return false;    }    public boolean set(String key, String value, long millisecond) {        try {            LOG.info("SET: key:{}, value:{}, expiretime:{}", key, value, millisecond);            Date expiry = new Date(millisecond);            return mcc.set(key, value, expiry);        } catch (Exception e) {            LOG.error("memcached set exception: " + key, e);        }        return false;    }    public boolean set(String key, String value) {        try {            LOG.info("SET: key:{}, value:{}", key, value);            return mcc.set(key, value);        } catch (Exception e) {            LOG.error("memcached set exception: " + key, e);        }        return false;    }    public long incr(String key) {        return mcc.incr(key);    }    public long addOrIncr(String key, long value) {        LOG.info("SET: key:{}, value:{}", key, value);        return mcc.addOrIncr(key, value);    }    public static List<String> getAllKeys(MemCachedClient mcc) {        LOG.info("Get all key.......");        List<String> list = new ArrayList<String>();        Map<String, Map<String, String>> items = mcc.statsItems();        for (Iterator<String> itemIt = items.keySet().iterator(); itemIt.hasNext();) {            String itemKey = itemIt.next();            Map<String, String> maps = items.get(itemKey);            for (Iterator<String> mapsIt = maps.keySet().iterator(); mapsIt.hasNext();) {                String mapsKey = mapsIt.next();                String mapsValue = maps.get(mapsKey);                if (mapsKey.endsWith("number")) { // memcached key 类型                                                  // item_str:integer:number_str                    String[] arr = mapsKey.split(":");                    int slabNumber = Integer.valueOf(arr[1].trim());                    int limit = Integer.valueOf(mapsValue.trim());                    Map<String, Map<String, String>> dumpMaps = mcc.statsCacheDump(slabNumber,                            limit);                    for (Iterator<String> dumpIt = dumpMaps.keySet().iterator(); dumpIt                            .hasNext();) {                        String dumpKey = dumpIt.next();                        Map<String, String> allMap = dumpMaps.get(dumpKey);                        for (Iterator<String> allIt = allMap.keySet().iterator(); allIt                                .hasNext();) {                            String allKey = allIt.next();                            list.add(allKey.trim());                        }                    }                }            }        }        LOG.info("获取服务器中所有的key完成.......");        return list;    }    public static void getAllKeyVal(List<String> keys) {        LOG.info("--------------------getAllKeyVal");        for (String key : keys) {            String val = (String) mcc.get(key);            LOG.info("get key: {} , val:{}", key, val);        }    }    public static void delAllKeys(List<String> keys) {        LOG.info("--------------------delAllKeys");        for (String key : keys) {            boolean ret = mcc.delete(key);            LOG.info("delete key: {} , succ:{}", key, ret);        }    }    public static void regexGetKey(List<String> keyList, String regex) {        LOG.info("--------------------regex: {}", regex);        for (String key : keyList) {            if (key.matches(regex)) {                LOG.info("key: {}", key);            }        }    }    public static void main(String[] args) {        // mcc.delete("XXXXABC");//        System.out.println(mcc.set("abc", "-1"));//        System.out.println(mcc.incr("abc"));//        System.out.println("-----------------------------------");        // System.out.println(mcc.addOrIncr("abc", 1));        // String key = "";        // String cache = (String)mcc.get(key);        // System.out.println(key+"----"+cache);        List<String> keys = getAllKeys(mcc);        getAllKeyVal(keys);    }}
gradle依赖包：
compile group: 'com.danga', name: 'MemCached', version: '2.6.6'
runtime 'org.slf4j:jcl-over-slf4j:1.6.6'
runtime 'ch.qos.logback:logback-classic:1.1.8'
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