fix comments

skywalking-collector/skywalking-collector-cluster/src/main/java/com/a/eye/skywalking/collector/actor/AbstractClusterWorker.java

@@ -11,22 +11,21 @@ import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
 /**
- * The <code>AbstractClusterWorker</code> should be implemented by any class whose instances
- * are intended to provide receive remote message that message will transfer across different jvm
- * which running in same server or another address server.
+ * The <code>AbstractClusterWorker</code> implementations represent workers,
+ * which receive remote messages.
  * <p>
- * Usually the implemented class used to receive persistence data or aggregation the metric.
+ * Usually, the implementations are doing persistent, or aggregate works.
  *
  * @author pengys5
- * @since feature3.0
+ * @since v3.0-2017
  */
 public abstract class AbstractClusterWorker extends AbstractWorker {
 
     /**
-     * Constructs a <code>AbstractClusterWorker</code> with the worker role and context.
+     * Construct an <code>AbstractClusterWorker</code> with the worker role and context.
      *
-     * @param role           The responsibility of worker in cluster, more than one workers can have
-     *                       same responsibility which use to provide load balancing ability.
+     * @param role           If multi-workers are for load balance, they should be more likely called worker instance.
+     *                       Meaning, each worker have multi instances.
      * @param clusterContext See {@link ClusterWorkerContext}
      * @param selfContext    See {@link LocalWorkerContext}
      */
@@ -35,7 +34,7 @@ public abstract class AbstractClusterWorker extends AbstractWorker {
     }
 
     /**
-     * Receive message
+     * This method use for message producer to call for send message.
      *
      * @param message The persistence data or metric data.
      * @throws Exception The Exception happen in {@link #onWork(Object)}
@@ -45,7 +44,7 @@ public abstract class AbstractClusterWorker extends AbstractWorker {
     }
 
     /**
-     * The data process logic in this method.
+     * This method use for message receiver to analyse message.
      *
      * @param message Cast the message object to a expect subclass.
      * @throws Exception Don't handle the exception, throw it.

skywalking-collector/skywalking-collector-cluster/src/main/java/com/a/eye/skywalking/collector/actor/AbstractClusterWorkerProvider.java

@@ -4,12 +4,12 @@ import akka.actor.ActorRef;
 import akka.actor.Props;
 
 /**
- * The <code>AbstractClusterWorkerProvider</code> should be implemented by any class whose instances
- * are intended to provide create the class instance whose implemented {@link AbstractClusterWorker}.
+ * The <code>AbstractClusterWorkerProvider</code> implementations represent providers,
+ * which create instance of cluster workers whose implemented {@link AbstractClusterWorker}.
  * <p>
  *
  * @author pengys5
- * @since feature3.0
+ * @since v3.0-2017
  */
 public abstract class AbstractClusterWorkerProvider<T extends AbstractClusterWorker> extends AbstractWorkerProvider<T> {
 

skywalking-collector/skywalking-collector-cluster/src/main/java/com/a/eye/skywalking/collector/actor/AbstractLocalAsyncWorker.java

@@ -6,16 +6,16 @@ import com.lmax.disruptor.EventHandler;
 import com.lmax.disruptor.RingBuffer;
 
 /**
- * The <code>AbstractLocalAsyncWorker</code> should be implemented by any class whose instances
- * are intended to provide receive asynchronous message in same jvm.
+ * The <code>AbstractLocalAsyncWorker</code> implementations represent workers,
+ * which receive local asynchronous message.
  *
  * @author pengys5
- * @since feature3.0
+ * @since v3.0-2017
  */
 public abstract class AbstractLocalAsyncWorker extends AbstractLocalWorker {
 
     /**
-     * Constructs a <code>AbstractLocalAsyncWorker</code> with the worker role and context.
+     * Construct an <code>AbstractLocalAsyncWorker</code> with the worker role and context.
      *
      * @param role           The responsibility of worker in cluster, more than one workers can have
      *                       same responsibility which use to provide load balancing ability.

skywalking-collector/skywalking-collector-cluster/src/main/java/com/a/eye/skywalking/collector/actor/selector/AbstractHashMessage.java

 package com.a.eye.skywalking.collector.actor.selector;
 
 /**
- * The <code>AbstractHashMessage</code> should be implemented by any class whose instances
- * are intended to provide send message with {@link HashCodeSelector}.
+ * The <code>AbstractHashMessage</code> implementations represent aggregate message,
+ * which use to aggregate metric.
+ * Make the message aggregator's worker selector use of {@link HashCodeSelector}.
  * <p>
- * Usually the implemented class used to persistence data to database
- * or aggregation the metric.
  *
  * @author pengys5
- * @since feature3.0
+ * @since v3.0-2017
  */
 public abstract class AbstractHashMessage {
     private int hashCode;

skywalking-collector/skywalking-collector-cluster/src/main/java/com/a/eye/skywalking/collector/actor/selector/HashCodeSelector.java

@@ -11,7 +11,7 @@ import java.util.List;
  * message to same {@link WorkerRef}. Usually, use to database operate which avoid dirty data.
  *
  * @author pengys5
- * @since feature3.0
+ * @since v3.0-2017
  */
 public class HashCodeSelector implements WorkerSelector<WorkerRef> {
 

skywalking-collector/skywalking-collector-cluster/src/main/java/com/a/eye/skywalking/collector/actor/selector/RollingSelector.java

@@ -10,7 +10,7 @@ import java.util.List;
  * It choose {@link WorkerRef} nearly random, by round-robin.
  *
  * @author pengys5
- * @since feature3.0
+ * @since v3.0-2017
  */
 public class RollingSelector implements WorkerSelector<WorkerRef> {
 

skywalking-collector/skywalking-collector-cluster/src/main/java/com/a/eye/skywalking/collector/actor/selector/WorkerSelector.java

@@ -12,7 +12,7 @@ import java.util.List;
  * Actually, the <code>WorkerRef</code> is designed to provide a routing ability in the collector cluster
  *
  * @author pengys5
- * @since feature3.0
+ * @since v3.0-2017
  */
 public interface WorkerSelector<T extends WorkerRef> {