add tutorials link

boot/src/main/java/com/taobao/arthas/boot/ProcessUtils.java

@@ -3,7 +3,6 @@ package com.taobao.arthas.boot;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
-import java.lang.management.ManagementFactory;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
@@ -18,6 +17,7 @@ import com.taobao.arthas.common.AnsiLog;
 import com.taobao.arthas.common.ExecutingCommand;
 import com.taobao.arthas.common.IOUtils;
 import com.taobao.arthas.common.JavaVersionUtils;
+import com.taobao.arthas.common.PidUtils;
 
 /**
  *
@@ -25,27 +25,8 @@ import com.taobao.arthas.common.JavaVersionUtils;
  *
  */
 public class ProcessUtils {
-    private static String PID = "-1";
     private static String FOUND_JAVA_HOME = null;
 
-    static {
-        // https://stackoverflow.com/a/7690178
-        String jvmName = ManagementFactory.getRuntimeMXBean().getName();
-        int index = jvmName.indexOf('@');
-
-        if (index > 0) {
-            try {
-                PID = Long.toString(Long.parseLong(jvmName.substring(0, index)));
-            } catch (Throwable e) {
-                // ignore
-            }
-        }
-    }
-
-    public static String getPid() {
-        return PID;
-    }
-
     @SuppressWarnings("resource")
     public static int select(boolean v, int telnetPortPid) throws InputMismatchException {
         Map<Integer, String> processMap = listProcessByJps(v);
@@ -120,7 +101,7 @@ public class ProcessUtils {
 
         List<String> lines = ExecutingCommand.runNative(command);
 
-        int currentPid = Integer.parseInt(ProcessUtils.getPid());
+        int currentPid = Integer.parseInt(PidUtils.getPid());
         for (String line : lines) {
             String[] strings = line.trim().split("\\s+");
             if (strings.length < 1) {

common/src/main/java/com/taobao/arthas/common/PidUtils.java

@@ -0,0 +1,30 @@
+package com.taobao.arthas.common;
+
+import java.lang.management.ManagementFactory;
+
+/**
+ *
+ * @author hengyunabc 2019-02-16
+ *
+ */
+public class PidUtils {
+    private static String PID = "-1";
+
+    static {
+        // https://stackoverflow.com/a/7690178
+        String jvmName = ManagementFactory.getRuntimeMXBean().getName();
+        int index = jvmName.indexOf('@');
+
+        if (index > 0) {
+            try {
+                PID = Long.toString(Long.parseLong(jvmName.substring(0, index)));
+            } catch (Throwable e) {
+                // ignore
+            }
+        }
+    }
+
+    public static String currentPid() {
+        return PID;
+    }
+}

core/src/main/java/com/taobao/arthas/core/shell/impl/ShellImpl.java

@@ -20,7 +20,6 @@ import com.taobao.arthas.core.shell.system.impl.InternalCommandManager;
 import com.taobao.arthas.core.shell.system.impl.JobControllerImpl;
 import com.taobao.arthas.core.shell.term.Term;
 import com.taobao.arthas.core.util.Constants;
-import com.taobao.arthas.core.util.DateUtils;
 import com.taobao.arthas.core.util.LogUtil;
 import com.taobao.middleware.logger.Logger;
 
@@ -114,8 +113,6 @@ public class ShellImpl implements Shell {
 
         if (welcome != null && welcome.length() > 0) {
             term.write(welcome + "\n");
-            term.write("pid: " + session.get(Session.PID) + "\n");
-            term.write("time: " + DateUtils.getCurrentDate() + "\n\n");
         }
         return this;
     }

core/src/main/java/com/taobao/arthas/core/util/ArthasBanner.java

@@ -1,5 +1,6 @@
 package com.taobao.arthas.core.util;
 
+import com.taobao.arthas.common.PidUtils;
 import com.taobao.arthas.core.shell.ShellServerOptions;
 import com.taobao.middleware.logger.Logger;
 import com.taobao.text.Color;
@@ -19,6 +20,7 @@ public class ArthasBanner {
     private static final String CREDIT_LOCATION = "/com/taobao/arthas/core/res/thanks.txt";
     private static final String VERSION_LOCATION = "/com/taobao/arthas/core/res/version";
     private static final String WIKI = "https://alibaba.github.io/arthas";
+    private static final String TUTORIALS = "https://alibaba.github.io/arthas/arthas-tutorials";
 
     private static String LOGO = "Welcome to Arthas";
     private static String VERSION = "unknown";
@@ -70,6 +72,10 @@ public class ArthasBanner {
         return WIKI;
     }
 
+    public static String tutorials() {
+        return TUTORIALS;
+    }
+
     public static String credit() {
         return THANKS;
     }
@@ -88,6 +94,13 @@ public class ArthasBanner {
 
     public static String welcome() {
         logger.info("arthas version: " + version());
-        return logo() + "\n" + "wiki: " + wiki() + "\n" + "version: " + version();
+        TableElement table = new TableElement().rightCellPadding(1)
+                        .row("wiki", wiki())
+                        .row("tutorials", tutorials())
+                        .row("version", version())
+                        .row("pid", PidUtils.currentPid())
+                        .row("time", DateUtils.getCurrentDate());
+
+        return logo() + "\n" + RenderUtil.render(table);
     }
 }