#149 vjmap最多运行15分钟，超时后退出并建议用户更改模式

vjmap/src/main/java/com/vip/vjtools/vjmap/VJMap.java

@@ -12,6 +12,7 @@
 import com.vip.vjtools.vjmap.oops.LoadedClassAccessor;
 import com.vip.vjtools.vjmap.oops.OldgenAccessor;
 import com.vip.vjtools.vjmap.oops.SurvivorAccessor;
+import com.vip.vjtools.vjmap.utils.TimeController.TimeoutException;
 
 import sun.jvm.hotspot.HotSpotAgent;
 import sun.jvm.hotspot.oops.ObjectHeap;
@@ -179,11 +180,11 @@ public void run() {
 
 				// 如果ctrl＋C退出，仍尽量打印结果
 				if (oldGenProcessor != null) {
-					tty.println("VJMap exited by user, below is the uncompleted summary ");
+					tty.println("VJMap aborted. Below is the incomplete summary: ");
 					oldGenProcessor.printResult();
 				}
 				if (heapProcessor != null) {
-					tty.println("VJMap exited by user, below is the uncompleted summary ");
+					tty.println("VJMap aborted. Below is the incomplete summary: ");
 					heapProcessor.printResult();
 				}
 				tty.flush();
@@ -219,6 +220,10 @@ public void run() {
 			double secs = (endTime - startTime) / 1000.0d;
 			tty.printf("%n Heap traversal took %.1f seconds.%n", secs);
 			tty.flush();
+		} catch (TimeoutException e) {
+			tty.println("\n\nVJMap aborted by timeout.");
+			tty.println("Try to use live option to reduce the fragments which make progress very slow.");
+			tty.println("./vjmap.sh -old:live PID\n\n");
 		} catch (Exception e) {
 			tty.println("Error Happen:" + e.getMessage());
 			if (e.getMessage() != null && e.getMessage().contains("Can't attach to the process")) {
@@ -271,8 +276,10 @@ private static void printHelp() {
 		tty.println("vjmap " + VERSION
 				+ " - prints per GC generation (Eden, Survivor, OldGen) object details of a given process.");
 		tty.println("Usage: vjmap.sh <options> <PID>");
+		tty.println("Usage: vjmap.sh <options> <executable java path> <coredump file path>");
 		tty.println("");
 		tty.printf(format, "-all", "print all gens histogram, order by total size");
+		tty.printf(format, "-all:live", "print all gens histogram, live objects only");
 		tty.printf(format, "-all:minsize=1024", "print all gens histogram, total size>=1024");
 		tty.printf(format, "-all:minsize=1024,byname",
 				"print all gens histogram, total size>=1024, order by class name");

vjmap/src/main/java/com/vip/vjtools/vjmap/oops/HeapHistogramVisitor.java

@@ -70,7 +70,7 @@ public boolean doObj(Oop obj) {
 
 		updateWith(classStats, objSize, place);
 
-		// 每完成1％ 打印一个，每完成10% 打印百分比提示
+		// 每完成1％ 打印一个.，每完成10% 打印百分比提示
 		progressNodifier.processingSize += objSize;
 		if (progressNodifier.processingSize > progressNodifier.nextNotificationSize) {
 			progressNodifier.printProgress();

vjmap/src/main/java/com/vip/vjtools/vjmap/utils/ProgressNotifier.java

@@ -12,6 +12,8 @@ public class ProgressNotifier {
 
 	private PrintStream tty = System.out;
 
+	private TimeController timeController = new TimeController();
+
 	public ProgressNotifier(long totalSize) {
 		this.totalSize = totalSize;
 		onePercentSize = totalSize / 100;
@@ -26,6 +28,7 @@ public void printHead() {
 	}
 
 	public void printProgress() {
+		timeController.checkTimedOut();
 		tty.print(".");
 		processingPercent++;
 		nextNotificationSize += onePercentSize;

vjmap/src/main/java/com/vip/vjtools/vjmap/utils/TimeController.java

@@ -0,0 +1,22 @@
+package com.vip.vjtools.vjmap.utils;
+
+/**
+ * 最多等待15分钟，超时后打印当前结果并退出，建议用户使用live参数
+ */
+public class TimeController {
+
+	long start = System.currentTimeMillis();
+
+	// 15 minutes
+	long maxTime = Long.parseLong(System.getProperty("vjmap.timeout", String.valueOf(60 * 1000 * 15)));
+
+	public void checkTimedOut() {
+		if (System.currentTimeMillis() - start > maxTime) {
+			throw new TimeoutException();
+		}
+	}
+
+	public static class TimeoutException extends RuntimeException {
+
+	}
+}