[incubator-dubbo-website] branch asf-site updated: Merge pull request #121, translate serialization.md.

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The following commit(s) were added to refs/heads/asf-site by this push:
     new a5619a1  Merge pull request #121, translate serialization.md.
a5619a1 is described below

commit a5619a1147ce6966e94543bd9566164295d3a7d9
Author: HazzaCheng <ha...@gmail.com>
AuthorDate: Thu Aug 30 11:54:56 2018 +0800

    Merge pull request #121, translate serialization.md.
---
 docs/en-us/user/demos/serialization.md | 77 ++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)

diff --git a/docs/en-us/user/demos/serialization.md b/docs/en-us/user/demos/serialization.md
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+## <font size=6>Using Efficient Java Serialization in Dubbo (Kryo and FST)</font>
+## Start Kryo and FST
+
+<font size=3>It is easy to use Kryo and FST. You only need to add an attribute in the XML configuration of Dubbo RPC:</font>
+
+```
+<dubbo:protocol name="dubbo" serialization="kryo"/>
+```
+
+```
+<dubbo:protocol name="dubbo" serialization="fst"/>
+```
+
+## Register serialized class
+
+<font size=3>To make Kryo and FST have high-performance, it is better to register those classes that need serialization to the Dubbo system. For example, we can implement the following callback interface: </font>
+
+	public class SerializationOptimizerImpl implements SerializationOptimizer {
+
+	    public Collection<Class> getSerializableClasses() {
+	        List<Class> classes = new LinkedList<Class>();
+	        classes.add(BidRequest.class);
+	        classes.add(BidResponse.class);
+	        classes.add(Device.class);
+	        classes.add(Geo.class);
+	        classes.add(Impression.class);
+	        classes.add(SeatBid.class);
+	        return classes;
+	    }
+	}
+
+
+
+<font size=3>Then add in the XML configuration:</font>
+
+```
+<dubbo:protocol name="dubbo" serialization="kryo" optimizer="com.alibaba.dubbo.demo.SerializationOptimizerImpl"/>
+```
+
+<font size=3>After registering these classes, serialization performance can be greatly improved, especially for small numbers of nested objects.
+
+Of course, when serializing a class, you might also cascade references to many classes, such as Java collection classes. In this case, we've automatically registered common classes in the JDK, so you don't need to register them repeatedly (and of course, it doesn't matter if you register them again), including:</font>
+
+
+	GregorianCalendar
+	InvocationHandler
+	BigDecimal
+	BigInteger
+	Pattern
+	BitSet
+	URI
+	UUID
+	HashMap
+	ArrayList
+	LinkedList
+	HashSet
+	TreeSet
+	Hashtable
+	Date
+	Calendar
+	ConcurrentHashMap
+	SimpleDateFormat
+	Vector
+	BitSet
+	StringBuffer
+	StringBuilder
+	Object
+	Object[]
+	String[]
+	byte[]
+	char[]
+	int[]
+	float[]
+	double[]
+
+
+<font size=3>Since registering serialized classes is only for performance optimization purposes, it doesn't matter if you forget to register some classes. In fact, Kryo and FST generally perform better than Hessian and Dubbo serializations even if no classes are registered.</font>
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