# This software license, granted by Terracotta Inc. - a Software AG company, is valid for and may only be used
# by the licensee of this product ("Licensee").
# Descriptor version: 4
# ------------------------------------------------------------------------------------
Date of Issue: 2015-08-19
Expiration Date: 2015-11-17
License Type: Trial
License Number: 1009994
Licensee: deren zhang, it
Email: [email protected] Product: BigMemory Go
Edition: DX
Capabilities: ehcache, TMC, ehcache offheap
Max Client Count: 0
ehcache.maxOffHeap: 32G
Signature: MC0CFHmKKAqyuq+bmly3S6GzM9yJDznNAhUAjDDruAR/GtZRFs2dkUP6WtK7MTU=
package com.sohu.tv.bigmemory.first;
import java.util.Date;
/**
* 俱乐部
*
* @author leifu
* @Date 2015年7月28日
* @Time 下午1:43:53
*/
public class Club {
/**
* 俱乐部id
*/
private int id;
/**
* 俱乐部名
*/
private String clubName;
/**
* 俱乐部描述
*/
private String clubInfo;
/**
* 创建日期
*/
private Date createDate;
/**
* 排名
*/
private int rank;
public Club(int id, String clubName, String clubInfo, Date createDate, int rank) {
super();
this.id = id;
this.clubName = clubName;
this.clubInfo = clubInfo;
this.createDate = createDate;
this.rank = rank;
}
public Club() {
super();
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getClubName() {
return clubName;
}
public void setClubName(String clubName) {
this.clubName = clubName;
}
public String getClubInfo() {
return clubInfo;
}
public void setClubInfo(String clubInfo) {
this.clubInfo = clubInfo;
}
public Date getCreateDate() {
return createDate;
}
public void setCreateDate(Date createDate) {
this.createDate = createDate;
}
public int getRank() {
return rank;
}
public void setRank(int rank) {
this.rank = rank;
}
@Override
public String toString() {
return "Club [id=" + id + ", clubName=" + clubName + ", clubInfo=" + clubInfo + ", createDate=" + createDate
+ ", rank=" + rank + "]";
}
}
2. BigMemory测试（Ehcache单元测试作为测试）
(1) 单元测试：
package com.sohu.tv.bigmemory.first;
import java.util.Date;
import org.junit.BeforeClass;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import net.sf.ehcache.Cache;
import net.sf.ehcache.CacheManager;
import net.sf.ehcache.Element;
/**
* 第一个BigMemory测试
*
* @author leifu
* @Date 2015年8月12日
* @Time 上午10:14:13
*/
public class FirstBigmemoryTest {
private static Logger logger = LoggerFactory.getLogger(FirstBigmemoryTest.class);
private static Cache cache;
private static final String BIGMEORY_CACHE_NAME = "firstOffHeapCache";
@BeforeClass
public static void setUp() {
CacheManager cacheManager = CacheManager.create(FirstBigmemoryTest.class.getClassLoader()
.getResourceAsStream("ehcache.xml"));
// 打印cacheManager管理的cache
String[] cacheNameArr = cacheManager.getCacheNames();
for (String cacheName : cacheNameArr) {
logger.info("cacheName: {}", cacheName);
}
cache = cacheManager.getCache(BIGMEORY_CACHE_NAME);
}
@Test
public void testCRUD() {
logger.info("At start, bigmemory object size: {}", cache.getSize());
// 唯一key
String key = "football:club:1";
Club club = new Club(1, "AC", "AC米兰", new Date(), 1);
// 增
Element element = new Element(key, club);
cache.put(element);
logger.info("after add bigmemory object size: {}", cache.getSize());
// 查
Element elementResult = cache.get(key);
Club clubResult = (Club) elementResult.getObjectValue();
logger.info("get key {} value is {}", key, clubResult.toString());
// 修改
club.setRank(8888);
cache.put(element);
logger.info("after set bigmemory object size: {}", cache.getSize());
// 再查
Element elementResultAgain = cache.get(key);
Club clubResultAgain = (Club) elementResultAgain.getObjectValue();
logger.info("get key {} again value is {}", key, clubResultAgain.toString());
// 删
boolean removeResult = cache.remove(key);
logger.info("remove result is {}, after remove bigmemory object size: {}", removeResult, cache.getSize());
// 增加一条，观察下次启动
cache.put(element);
logger.info("At final, bigmemory object size: " + cache.getSize());
// 生产环境不要使用，影响性能
logger.info("At final, bigmemory memory size: " + cache.calculateInMemorySize());
}
}
(2) 输出报错：Club必须序列化
net.sf.ehcache.CacheException: The element '[ key = football:club:1, value=Club [id=1, clubName=AC, clubInfo=AC米兰, createDate=Sat Aug 22 09:40:29 CST 2015, rank=1], version=1, hitCount=0, CreationTime = 1440207629814, LastAccessTime = 1440207629814 ]' is not serializable and cannot be put into the offheap cache firstOffHeapCache
at net.sf.ehcache.store.offheap.OffHeapStore.handleNotSerializableException(OffHeapStore.java:384)
at net.sf.ehcache.store.offheap.OffHeapStore.putFaulted(OffHeapStore.java:419)
at net.sf.ehcache.store.CacheStore$2.call(CacheStore.java:127)
at net.sf.ehcache.store.CacheStore$2.call(CacheStore.java:121)
at net.sf.ehcache.store.cachingtier.OnHeapCachingTier$Fault.get(OnHeapCachingTier.java:327)
at net.sf.ehcache.store.cachingtier.OnHeapCachingTier$Fault.access$200(OnHeapCachingTier.java:304)
at net.sf.ehcache.store.cachingtier.OnHeapCachingTier.get(OnHeapCachingTier.java:174)
at net.sf.ehcache.store.CacheStore.put(CacheStore.java:121)
at net.sf.ehcache.Cache.putInternal(Cache.java:1501)
at net.sf.ehcache.Cache.put(Cache.java:1427)
at net.sf.ehcache.Cache.put(Cache.java:1392)
at com.sohu.tv.bigmemory.first.FirstBigmemoryTest.testCRUD(FirstBigmemoryTest.java:41)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
(3) 修复：Club实现序列化接口
public class Club implements Serializable
(4) 输出结果正常：
输出信息包含证书的验证、BigMemory堆外内存的分配
11:04:00.965 [main] INFO o.t.license.ehcache.LicenseManager - Terracotta license loaded from resource /terracotta-license.key
Date of Issue: 2015-08-19
Expiration Date: 2015-11-17
License Type: Trial
License Number: 1009994
Licensee: deren zhang, it
Email: [email protected] Product: BigMemory Go
Edition: DX
Capabilities: ehcache, TMC, ehcache offheap
Max Client Count: 0
ehcache.maxOffHeap: 32G
11:04:01.287 [main] INFO n.s.e.p.s.f.AnnotationSizeOfFilter - Using regular expression provided through VM argument net.sf.ehcache.pool.sizeof.ignore.pattern for IgnoreSizeOf annotation : ^.*cache\..*IgnoreSizeOf$
11:04:01.296 [main] INFO n.sf.ehcache.pool.sizeof.AgentLoader - Located valid 'tools.jar' at 'C:\Program Files\Java\jdk1.7.0_60\jre\..\lib\tools.jar'
11:04:01.358 [main] INFO n.s.e.pool.sizeof.JvmInformation - Detected JVM data model settings of: 64-Bit HotSpot JVM with Compressed OOPs
11:04:01.430 [main] INFO n.sf.ehcache.pool.sizeof.AgentLoader - Extracted agent jar to temporary file C:\Users\leifu\AppData\Local\Temp\ehcache-sizeof-agent1571240522467793322.jar
11:04:01.430 [main] INFO n.sf.ehcache.pool.sizeof.AgentLoader - Trying to load agent @ C:\Users\leifu\AppData\Local\Temp\ehcache-sizeof-agent1571240522467793322.jar
11:04:01.438 [main] INFO n.s.e.pool.impl.DefaultSizeOfEngine - using Agent sizeof engine
11:04:01.510 [main] INFO n.s.e.s.offheap.OffHeapStoreFactory - Creating Off-Heap Area Using Config
Heuristic Configuration: firstOffHeapCache
Maximum Size (specified) : 2GB
Minimum Chunk Size : 128MB
Maximum Chunk Size : 1GB
Concurrency : 64
Initial Segment Table Size : 1K slots
Segment Data Page Size : 1MB
11:04:01.515 [main] INFO c.t.o.p.UpfrontAllocatingPageSource - Allocating 2GB in chunks
11:04:02.215 [main] INFO c.t.o.p.UpfrontAllocatingPageSource - Allocated 2GB in 1GB chunks.
11:04:02.215 [main] INFO c.t.o.p.UpfrontAllocatingPageSource - Took 699 ms to create CacheManager off-heap storage of 2GB.
11:04:02.304 [main] INFO c.s.t.b.first.FirstBigmemoryTest - cacheName: firstOffHeapCache
11:04:02.307 [main] INFO c.s.t.b.first.FirstBigmemoryTest - At start, bigmemory object size: 0
11:04:02.343 [main] INFO c.s.t.b.first.FirstBigmemoryTest - after add bigmemory object size: 1
11:04:02.346 [main] INFO c.s.t.b.first.FirstBigmemoryTest - get key football:club:1 value is Club [id=1, clubName=AC, clubInfo=AC米兰, createDate=Sat Aug 22 11:04:02 CST 2015, rank=1]
11:04:02.396 [main] INFO c.s.t.b.first.FirstBigmemoryTest - after set bigmemory object size: 1
11:04:02.396 [main] INFO c.s.t.b.first.FirstBigmemoryTest - get key football:club:1 again value is Club [id=1, clubName=AC, clubInfo=AC米兰, createDate=Sat Aug 22 11:04:02 CST 2015, rank=8888]
11:04:02.397 [main] INFO c.s.t.b.first.FirstBigmemoryTest - remove result is true, after remove bigmemory object size: 0
11:04:02.398 [main] INFO c.s.t.b.first.FirstBigmemoryTest - At final, bigmemory object size: 1
11:04:02.398 [main] INFO c.s.t.b.first.FirstBigmemoryTest - At final, bigmemory memory size: 784
package com.sohu.tv.serializer;
import com.dyuproject.protostuff.LinkedBuffer;
import com.dyuproject.protostuff.ProtostuffIOUtil;
import com.dyuproject.protostuff.Schema;
import com.dyuproject.protostuff.runtime.RuntimeSchema;
import java.util.concurrent.ConcurrentHashMap;
/**
* protostuff序列化工具
*
* @author leifu
* @Date 2015-8-22
* @Time 上午10:05:20
*/
public class ProtostuffSerializer {
private static ConcurrentHashMap, Schema> cachedSchema = new ConcurrentHashMap, Schema>();
public byte[] serialize(final T source) {
VO vo = new VO(source);
final LinkedBuffer buffer = LinkedBuffer.allocate(LinkedBuffer.DEFAULT_BUFFER_SIZE);
try {
final Schema schema = getSchema(VO.class);
return serializeInternal(vo, schema, buffer);
} catch (final Exception e) {
throw new IllegalStateException(e.getMessage(), e);
} finally {
buffer.clear();
}
}
public T deserialize(final byte[] bytes) {
try {
Schema schema = getSchema(VO.class);
VO vo = deserializeInternal(bytes, schema.newMessage(), schema);
if (vo != null && vo.getValue() != null) {
return (T) vo.getValue();
}
} catch (final Exception e) {
throw new IllegalStateException(e.getMessage(), e);
}
return null;
}
private byte[] serializeInternal(final T source, final Schema schema, final LinkedBuffer buffer) {
return ProtostuffIOUtil.toByteArray(source, schema, buffer);
}
private T deserializeInternal(final byte[] bytes, final T result, final Schema schema) {
ProtostuffIOUtil.mergeFrom(bytes, result, schema);
return result;
}
private static Schema getSchema(Class clazz) {
@SuppressWarnings("unchecked")
Schema schema = (Schema) cachedSchema.get(clazz);
if (schema == null) {
schema = RuntimeSchema.createFrom(clazz);
cachedSchema.put(clazz, schema);
}
return schema;
}
}
package com.sohu.tv.serializer;
import java.io.Serializable;
/**
* @author leifu
* @Date 2015-8-22
* @Time 上午10:05:44
* @param
*/
public class VO implements Serializable {
private T value;
public VO(T value) {
this.value = value;
}
public VO() {
}
public T getValue() {
return value;
}
@Override
public String toString() {
return "VO{" +
"value=" + value +
'}';
}
}
2. ProtoStuff + BigMemory单元测试：
@Test
public void testBigMemoryWithSerializable() {
ProtostuffSerializer protostuffSerializer = new ProtostuffSerializer();
// 唯一key
String key = "football:club:1";
byte[] clubBytes = protostuffSerializer.serialize(new Club(1, "AC", "AC米兰", new Date(), 1));
// 增
Element element = new Element(key, clubBytes);
cache.put(element);
// 查
Element elementResult = cache.get(key);
byte[] clubBytesResult = (byte[]) elementResult.getObjectValue();
Club clubResult = protostuffSerializer.deserialize(clubBytesResult);
logger.info("get key {} value is {}", key, clubResult.toString());
}
输出：
12:49:31.276 [main] INFO o.t.license.ehcache.LicenseManager - Terracotta license loaded from resource /terracotta-license.key
Date of Issue: 2015-08-19
Expiration Date: 2015-11-17
License Type: Trial
License Number: 1009994
Licensee: deren zhang, it
Email: [email protected] Product: BigMemory Go
Edition: DX
Capabilities: ehcache, TMC, ehcache offheap
Max Client Count: 0
ehcache.maxOffHeap: 32G
12:49:31.627 [main] INFO n.s.e.p.s.f.AnnotationSizeOfFilter - Using regular expression provided through VM argument net.sf.ehcache.pool.sizeof.ignore.pattern for IgnoreSizeOf annotation : ^.*cache\..*IgnoreSizeOf$
12:49:31.634 [main] INFO n.sf.ehcache.pool.sizeof.AgentLoader - Located valid 'tools.jar' at 'C:\Program Files\Java\jdk1.7.0_60\jre\..\lib\tools.jar'
12:49:31.694 [main] INFO n.s.e.pool.sizeof.JvmInformation - Detected JVM data model settings of: 64-Bit HotSpot JVM with Compressed OOPs
12:49:31.771 [main] INFO n.sf.ehcache.pool.sizeof.AgentLoader - Extracted agent jar to temporary file C:\Users\leifu\AppData\Local\Temp\ehcache-sizeof-agent7979572902856961639.jar
12:49:31.771 [main] INFO n.sf.ehcache.pool.sizeof.AgentLoader - Trying to load agent @ C:\Users\leifu\AppData\Local\Temp\ehcache-sizeof-agent7979572902856961639.jar
12:49:31.783 [main] INFO n.s.e.pool.impl.DefaultSizeOfEngine - using Agent sizeof engine
12:49:31.839 [main] INFO n.s.e.s.offheap.OffHeapStoreFactory - Creating Off-Heap Area Using Config
Heuristic Configuration: firstOffHeapCache
Maximum Size (specified) : 2GB
Minimum Chunk Size : 128MB
Maximum Chunk Size : 1GB
Concurrency : 64
Initial Segment Table Size : 1K slots
Segment Data Page Size : 1MB
12:49:31.847 [main] INFO c.t.o.p.UpfrontAllocatingPageSource - Allocating 2GB in chunks
12:49:32.682 [main] INFO c.t.o.p.UpfrontAllocatingPageSource - Allocated 2GB in 1GB chunks.
12:49:32.682 [main] INFO c.t.o.p.UpfrontAllocatingPageSource - Took 835 ms to create CacheManager off-heap storage of 2GB.
12:49:32.801 [main] INFO c.s.t.b.first.FirstBigmemoryTest - cacheName: firstOffHeapCache
12:49:32.952 [main] INFO c.s.t.b.first.FirstBigmemoryTest - get key football:club:1 value is Club [id=1, clubName=AC, clubInfo=AC米兰, createDate=Sat Aug 22 12:49:32 CST 2015, rank=1]
继承 extends 多态
继承是面向对象最经常使用的特征之一：继承语法是通过继承发、基类的域和方法 //继承就是从现有的类中生成一个新的类，这个新类拥有现有类的所有extends是使用继承的关键字：
在A类中定义属性和方法；
class A{
//定义属性
int age；
//定义方法
public void go
hive DDL语法汇总
１、对表重命名
hive> ALTER TABLE table_name RENAME TO new_table_name;
2、修改表备注
hive> ALTER TABLE table_name SET TBLPROPERTIES ('comment' = new_comm
