判断 socket 状态

src/main/java/org/csource/fastdfs/StorageClient.java

@@ -1748,6 +1748,14 @@ public class StorageClient {
     this.storageServer.getSocket().getOutputStream().write(wholePkg);
   }
 
+  public boolean isConnected(){
+    return trackerServer.isConnected();
+  }
+
+  public boolean isAvaliable(){
+    return trackerServer.isAvaliable();
+  }
+
   /**
    * Upload file by file buff
    *

src/main/java/org/csource/fastdfs/TrackerServer.java

@@ -78,4 +78,36 @@ public class TrackerServer {
   protected void finalize() throws Throwable {
     this.close();
   }
+
+  public boolean isConnected(){
+    boolean isConnected = false;
+    if (sock != null){
+      if (sock.isConnected()){
+        isConnected = true;
+      }
+    }
+    return isConnected;
+  }
+
+  public boolean isAvaliable(){
+    if(isConnected()){
+      if(sock.getPort() == 0){
+        return false;
+      }
+      if(sock.getInetAddress() == null){
+        return false;
+      }
+      if(sock.getRemoteSocketAddress() == null){
+        return false;
+      }
+      if(sock.isInputShutdown()){
+        return false;
+      }
+      if(sock.isOutputShutdown()){
+        return false;
+      }
+      return true;
+    }
+    return false;
+  }
 }