Support Spymemcached V2.0

apm-sniffer/apm-sdk-plugin/spymemcached-2.x-plugin/pom.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <project
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
-	xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
-	<modelVersion>4.0.0</modelVersion>
-	<parent>
-		<groupId>org.skywalking</groupId>
-		<artifactId>apm-sdk-plugin</artifactId>
-		<version>3.2.2-2017</version>
-	</parent>
-	
-	<artifactId>apm-spymemcached-2.x-plugin</artifactId>
-	<name>spymemcached-2.x-plugin</name>
-	<url>http://maven.apache.org</url>
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
+    xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.skywalking</groupId>
+        <artifactId>apm-sdk-plugin</artifactId>
+        <version>3.2.3-2017</version>
+    </parent>
 
-	<properties>
-		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<spymemcached.version>2.11.1</spymemcached.version>
-	</properties>
+    <artifactId>apm-spymemcached-2.x-plugin</artifactId>
+    <name>spymemcached-2.x-plugin</name>
+    <url>http://maven.apache.org</url>
 
-	<dependencies>
-		<dependency>
-			<groupId>net.spy</groupId>
-			<artifactId>spymemcached</artifactId>
-			<version>${spymemcached.version}</version>
-			<scope>provided</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.logging.log4j</groupId>
-			<artifactId>log4j-core</artifactId>
-			<version>2.4.1</version>
-			<scope>test</scope>
-		</dependency>
-	</dependencies>
-</project>
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <spymemcached.version>2.11.1</spymemcached.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>net.spy</groupId>
+            <artifactId>spymemcached</artifactId>
+            <version>${spymemcached.version}</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-core</artifactId>
+            <version>2.4.1</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>
\ No newline at end of file

apm-sniffer/apm-sdk-plugin/spymemcached-2.x-plugin/src/main/java/org/skywalking/apm/plugin/spymemcached/v2/MemcachedMethodInterceptor.java

@@ -18,15 +18,12 @@ public class MemcachedMethodInterceptor implements InstanceMethodsAroundIntercep
     @Override 
     public void beforeMethod(EnhancedInstance objInst, Method method, Object[] allArguments,
         Class<?>[] argumentsTypes, MethodInterceptResult result) throws Throwable {
-        Object[] arguments = allArguments;
         String peer = String.valueOf(objInst.getSkyWalkingDynamicField());
         AbstractSpan span = ContextManager.createExitSpan(SPY_MEMCACHE + method.getName(), peer);
         span.setComponent(ComponentsDefine.MEMCACHE);
         Tags.DB_TYPE.set(span, ComponentsDefine.MEMCACHE.getName());
         SpanLayer.asDB(span);
-        if (allArguments.length > 0 && arguments[0] instanceof String) {
-            Tags.DB_STATEMENT.set(span, method.getName() + " " + arguments[0]);
-        }
+        Tags.DB_STATEMENT.set(span, method.getName() + " " + allArguments[0]);
     }
 
     @Override 

apm-sniffer/apm-sdk-plugin/spymemcached-2.x-plugin/src/main/java/org/skywalking/apm/plugin/spymemcached/v2/define/MemcachedInstrumentation.java

@@ -22,7 +22,7 @@ import static net.bytebuddy.matcher.ElementMatchers.takesArgument;
  * {@link XMemcachedConstructorWithInetSocketAddressListArgInterceptor} intercepts the constructor with
  * argument {@link java.net.InetSocketAddress}.
  * 
- *@author IluckySi
+ * @author IluckySi
  * 
  */
 public class MemcachedInstrumentation extends ClassInstanceMethodsEnhancePluginDefine {