首先，通过maven引入jar
<dependency>
<groupId>net.spy</groupId>
<artifactId>spymemcached</artifactId>
<version>2.10.3</version>
</dependency>
创建MemCache对象
package com.os.core.util.memcache;
import java.util.Map;
import java.util.Set;
/**
* Created by PengSongHe on 2016/5/11.
*/
public class MemCache {
private static MemCacheService memCacheService = null;
private static MemCache memCache = new MemCache();
public static MemCache getInstance() {
return memCache;
}
private MemCache() {
memCacheService = MemCacheServiceImpl.getInstance();
}
public Object get(String key) {
try {
if(memCacheService != null) {
return memCacheService.get(key);
}
} catch (Exception var3) {
var3.printStackTrace();
}
return null;
}
public boolean set(String key, Object value) {
try {
if(memCacheService != null) {
return memCacheService.set(key, value);
}
} catch (Exception var4) {
var4.printStackTrace();
}
return false;
}
public Map<String, Object> getBulk(Set<String> keys) {
try {
if(memCacheService != null) {
return memCacheService.getBulk(keys);
}
} catch (Exception var3) {
var3.printStackTrace();
}
return null;
}
public boolean remove(String key) {
try {
if(memCacheService != null) {
return memCacheService.remove(key);
}
} catch (Exception var3) {
var3.printStackTrace();
}
return false;
}
public boolean set(String key, Object value, int exp) {
try {
if(memCacheService != null) {
return memCacheService.set(key, value, exp);
}
} catch (Exception var5) {
var5.printStackTrace();
}
return false;
}
}
创建MemCacheService接口
package com.os.core.util.memcache;
import java.util.Map;
import java.util.Set;
/**
* Created by PengSongHe on 2016/5/11.
*/
public interface MemCacheService {
Object get(String var1);
boolean set(String var1, Object var2);
Map<String, Object> getBulk(Set<String> var1);
boolean remove(String var1);
boolean set(String var1, Object var2, int var3);
}
创建MemCacheService接口实现MemCacheServiceImpl
package com.os.core.util.memcache;
import com.os.core.util.web.PropertiesReader;
import net.spy.memcached.AddrUtil;
import net.spy.memcached.DefaultConnectionFactory;
import net.spy.memcached.MemcachedClient;
import net.spy.memcached.OperationFactory;
import net.spy.memcached.internal.BulkFuture;
import net.spy.memcached.internal.GetFuture;
import net.spy.memcached.internal.OperationFuture;
import net.spy.memcached.transcoders.SerializingTranscoder;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.io.IOException;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
/**
* Created by PengSongHe on 2016/5/11.
*/
public class MemCacheServiceImpl implements MemCacheService {
public static final String CACHE_PROP_FILE = "project";
public static final String ENCODING = "UTF-8";
public static String isUse = PropertiesReader.getValue("project", "isUse");
private static Log log = LogFactory.getLog(MemCacheServiceImpl.class);
private static ConcurrentHashMap<String, MemCacheService> flyweights = new ConcurrentHashMap();
private MemcachedClient mc1 = null;
private MemcachedClient mc2 = null;
public static final int DEFAULT_MEMCACHED_TIMEOUT = 1;
private int opTimeout = 1;
public static final int DEFAULT_MEMCACHED_TIMEOUT_BATCH = 3;
private int opTimeoutBulk = 3;
public static final int DEFAULT_READBUF_SIZE = 16384;
private int readBufSize = 16384;
public static final int DEFAULT_OPQ_SIZE = 16384;
private int opQueueLens = 3;
public static final int DEFAULT_MEMCACHED_EXP_HOURS = 24;
private int expHour = 24;
public static final int DEFAULT_MEMCACHED_RETRY = 3;
private int retry = 3;
public static MemCacheService getInstance(String prop_file) {
if(!flyweights.containsKey(prop_file)) {
synchronized(prop_file) {
flyweights.put(prop_file, new MemCacheServiceImpl(prop_file));
}
}
return (MemCacheService)flyweights.get(prop_file);
}
public MemCacheServiceImpl() {
String prop_file = "project";
if(!flyweights.containsKey(prop_file)) {
synchronized(prop_file) {
flyweights.put(prop_file, new MemCacheServiceImpl(prop_file));
}
}
}
public static MemCacheService getInstance() {
return "1".equalsIgnoreCase(isUse)?getInstance("project"):null;
}
private MemCacheServiceImpl(String prop_file) {
String server1 = PropertiesReader.getValue(prop_file, "server1");
String server2 = PropertiesReader.getValue(prop_file, "server2");
try {
this.opTimeout = Integer.parseInt(PropertiesReader.getValue(prop_file, "opTimeout"));
this.opTimeoutBulk = Integer.parseInt(PropertiesReader.getValue(prop_file, "opTimeoutBulk"));
this.retry = Integer.parseInt(PropertiesReader.getValue(prop_file, "retry"));
this.readBufSize = Integer.parseInt(PropertiesReader.getValue(prop_file, "readBufSize"));
this.opQueueLens = Integer.parseInt(PropertiesReader.getValue(prop_file, "opQueueLen"));
this.expHour = Integer.parseInt(PropertiesReader.getValue(prop_file, "expHour"));
} catch (Exception var7) {
log.error("loading properties fail, use default config!");
}
try {
this.mc1 = new MemcachedClient(new DefaultConnectionFactory() {
public long getOperationTimeout() {
return (long)(MemCacheServiceImpl.this.opTimeout * 1000);
}
public int getReadBufSize() {
return MemCacheServiceImpl.this.readBufSize;
}
public OperationFactory getOperationFactory() {
return super.getOperationFactory();
}
public int getOpQueueLen() {
return MemCacheServiceImpl.this.opQueueLens;
}
public boolean isDaemon() {
return true;
}
}, AddrUtil.getAddresses(server1));
this.mc2 = new MemcachedClient(new DefaultConnectionFactory() {
public long getOperationTimeout() {
return (long)(MemCacheServiceImpl.this.opTimeout * 1000);
}
public int getReadBufSize() {
return MemCacheServiceImpl.this.readBufSize;
}
public OperationFactory getOperationFactory() {
return super.getOperationFactory();
}
public int getOpQueueLen() {
return this.opQueueLen;
}
public boolean isDaemon() {
return true;
}
}, AddrUtil.getAddresses(server2));
} catch (IOException var6) {
log.error("DefaultConnectionFactory memcache error:", var6);
}
SerializingTranscoder x1 = (SerializingTranscoder)this.mc1.getTranscoder();
x1.setCharset("UTF-8");
SerializingTranscoder x2 = (SerializingTranscoder)this.mc2.getTranscoder();
x2.setCharset("UTF-8");
}
public Object get(String key) {
Object result = null;
try {
for(int ex = 0; ex < this.retry; ++ex) {
result = this._get(key);
if(result != null) {
break;
}
}
if(result == null) {
;
}
} catch (Exception var4) {
var4.printStackTrace();
}
return result;
}
private Object _get(String key) {
Object myObj = null;
try {
GetFuture e = this.mc1.asyncGet(key);
try {
myObj = e.get((long)this.opTimeout, TimeUnit.SECONDS);
} catch (TimeoutException var9) {
var9.printStackTrace();
e.cancel(false);
} catch (InterruptedException var10) {
var10.printStackTrace();
e.cancel(false);
} catch (ExecutionException var11) {
var11.printStackTrace();
e.cancel(false);
}
if(myObj == null) {
GetFuture f2 = this.mc2.asyncGet(key);
try {
myObj = f2.get((long)this.opTimeout, TimeUnit.SECONDS);
} catch (TimeoutException var6) {
var6.printStackTrace();
f2.cancel(false);
} catch (InterruptedException var7) {
var7.printStackTrace();
f2.cancel(false);
} catch (ExecutionException var8) {
var8.printStackTrace();
f2.cancel(false);
}
}
} catch (Exception var12) {
var12.printStackTrace();
}
if(myObj != null) {
;
}
return myObj;
}
public Map<String, Object> getBulk(Set<String> keys) {
log.info("[ACCESS]begin to get info from cache in bulk...");
Map ret = null;
try {
BulkFuture i$ = this.mc1.asyncGetBulk(keys);
try {
ret = (Map)i$.get((long)this.opTimeoutBulk, TimeUnit.SECONDS);
} catch (TimeoutException var9) {
log.info("[FAIL]time out when getting objects from cache server1...");
i$.cancel(false);
} catch (InterruptedException var10) {
log.info("[FAIL]thread been interrupted while waiting when getting object from cache server1...");
i$.cancel(false);
} catch (ExecutionException var11) {
log.info("[FAIL]exception when getting object from cache server1...");
i$.cancel(false);
}
if(ret == null) {
BulkFuture key = this.mc2.asyncGetBulk(keys);
try {
ret = (Map)key.get((long)this.opTimeoutBulk, TimeUnit.SECONDS);
} catch (TimeoutException var6) {
log.info("[FAIL]time out when getting objects from cache server2...");
key.cancel(false);
} catch (InterruptedException var7) {
log.info("[FAIL]thread been interrupted while waiting when getting object from cache server2...");
key.cancel(false);
} catch (ExecutionException var8) {
log.info("[FAIL]exception when getting object from cache server2...");
key.cancel(false);
}
}
} catch (Exception var12) {
log.error("[ERROR]other exception when getting objects from fengchao cache...", var12);
}
if(ret != null) {
Iterator i$1 = keys.iterator();
while(i$1.hasNext()) {
String key1 = (String)i$1.next();
if(ret.get(key1) != null) {
log.info("[GET]SHOOTED\tKey=" + key1 + "\tValue=" + ret.get(key1).toString());
}
}
}
return ret;
}
public boolean set(String key, Object value) {
boolean result = false;
for(int i = 0; i < this.retry; ++i) {
result = this._set(key, value);
if(result) {
break;
}
log.info("set info into cache failed begin to retry " + i);
}
if(!result) {
log.error("[FAIL] completely failed when setting info into cache after " + this.retry + " times");
}
return result;
}
private boolean _set(String key, Object value) {
boolean ret = false;
OperationFuture f = this.mc1.set(key, this.expHour * 60 * 60, value);
OperationFuture f2 = this.mc2.set(key, this.expHour * 60 * 60, value);
try {
boolean e = ((Boolean)f.get((long)this.opTimeout, TimeUnit.SECONDS)).booleanValue();
boolean fs2 = ((Boolean)f2.get((long)this.opTimeout, TimeUnit.SECONDS)).booleanValue();
ret = e || fs2;
if(!e) {
log.info("[FAIL]CACHE SET FAIL:server1 set failed: Key=" + key + "\tValue=" + value.toString());
} else if(!fs2) {
log.info("[FAIL]CACHE SET FAIL:server2 set failed: Key=" + key + "\tValue=" + value.toString());
}
} catch (TimeoutException var8) {
log.info("[FAIL]time out when getting objects from cache server2...");
f.cancel(false);
f2.cancel(false);
} catch (InterruptedException var9) {
log.error("[ERROR]exception when setting fengchao cache - thread been interrupted...", var9);
f.cancel(false);
f2.cancel(false);
} catch (ExecutionException var10) {
log.error("[ERROR]exception when setting fengchao cache - exception when getting status...", var10);
f.cancel(false);
f2.cancel(false);
} catch (Exception var11) {
log.error("[ERROR]exception when setting fengchao cache - other exceptions...", var11);
f.cancel(false);
f2.cancel(false);
}
if(value != null) {
log.info("MemCacheServiceImpl.set,key=" + key + ",value=" + value.getClass());
} else {
log.info("MemCacheServiceImpl.set,key=" + key + ",value=null");
}
return ret;
}
public boolean remove(String key) {
boolean ret = false;
OperationFuture f = this.mc1.delete(key);
OperationFuture f2 = this.mc2.delete(key);
try {
ret = ((Boolean)f.get((long)this.opTimeout, TimeUnit.SECONDS)).booleanValue() && ((Boolean)f2.get((long)this.opTimeout, TimeUnit.SECONDS)).booleanValue();
} catch (TimeoutException var6) {
log.info("[FAIL]time out when getting objects from cache server2...");
f.cancel(false);
f2.cancel(false);
} catch (InterruptedException var7) {
log.error("[ERROR]exception when deleting fengchao cache - thread been interrupted...", var7);
f.cancel(false);
f2.cancel(false);
ret = false;
} catch (ExecutionException var8) {
log.error("[ERROR]exception when deleting fengchao cache - exception when getting status...", var8);
f.cancel(false);
f2.cancel(false);
ret = false;
} catch (Exception var9) {
log.error("[ERROR]exception when deleting fengchao cache - other exceptions...", var9);
f.cancel(false);
f2.cancel(false);
ret = false;
}
log.info("[REMOVE]" + ret + "\tKey=" + key);
return ret;
}
public boolean set(String key, Object value, int exp) {
if(value == null) {
return false;
} else {
boolean ret = false;
OperationFuture f = this.mc1.set(key, exp, value);
OperationFuture f2 = this.mc2.set(key, exp, value);
try {
boolean e = ((Boolean)f.get((long)this.opTimeout, TimeUnit.SECONDS)).booleanValue();
boolean fs2 = ((Boolean)f2.get((long)this.opTimeout, TimeUnit.SECONDS)).booleanValue();
ret = e || fs2;
if(!e) {
log.info("[FAIL]CACHE SET FAIL:server1 set failed: Key=" + key + ",Value=" + value.toString());
} else if(!fs2) {
log.info("[FAIL]CACHE SET FAIL:server2 set failed: Key=" + key + ",Value=" + value.toString());
}
} catch (Exception var9) {
if(!"LOGIN_IP".equalsIgnoreCase(key)) {
log.info("MemCacheServiceImpl.set,key=" + key + ",value=" + value + ",Exception");
}
var9.printStackTrace();
f.cancel(false);
f2.cancel(false);
}
log.info("MemCacheServiceImpl.set,key=" + key + ",value=" + value.getClass());
return ret;
}
}
}
