java - 在开发模式中看到 Twig Load 错误，但在 GAME 中没有

Question

尝试使用 Twig(见下文)加载时，我在本地开发模式中看到了我们在 Live GAE 中看不到的异常。

我的同事也没有看到它，但我们有相同的开发设置
(虽然他在 Mac 上运行)

它失败的项目是 ArrayList<ContactStatus>在哪里ContactStatus是一个简单的枚举(见下文)，这是模型
宣言

List<ContactStatus> contactStatuses = new ArrayList<ContactStatus>();

所以据我所知，这应该是开箱即用的吗？

否 @Child需要注释等吗？ (确实添加 @Embedded 似乎
导致问题 35: http://code.google.com/p/twig-persist/issues/detail?id=35 )

当我运行调试 session 时，这似乎失败了，因为 ArrayList不实现 Comparable (因为 Enum 总是如此)

我们做错了什么？!

版本

Java 7

Twig 2.0-beta3

AppEngine 1.6.2.1

GWT 2.4.0

枚举

public enum ContactStatus implements IsSerializable, Serializable {
   Public, Secret, Blocked, Ignored;
}

我们在开发模式中看到的异常

java.lang.IllegalArgumentException: Cannot compare [SimpleProperty value=[Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored] path=contactStatuses indexed=false] with [SimpleProperty value=[Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Blocked, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored, Ignored] path=contactStatuses indexed=false]
at com.google.code.twig.util.PropertyComparator.compare(PropertyComparator.java:23)
at com.google.code.twig.util.PropertyComparator.compare(PropertyComparator.java:7)
at java.util.TreeMap.compare(TreeMap.java:1188)
at java.util.TreeMap.put(TreeMap.java:531)
at java.util.TreeSet.add(TreeSet.java:255)
at java.util.AbstractCollection.addAll(AbstractCollection.java:334)
at java.util.TreeSet.addAll(TreeSet.java:312)
at com.google.code.twig.standard.StandardDecodeCommand.entityToInstance(StandardDecodeCommand.java:60)
at com.google.code.twig.standard.StandardDecodeCommand.keyToInstance(StandardDecodeCommand.java:127)
at com.google.code.twig.standard.StandardSingleTypedLoadCommand.keyToInstance(StandardSingleTypedLoadCommand.java:9)
at com.google.code.twig.standard.StandardSingleTypedLoadCommand.now(StandardSingleTypedLoadCommand.java:34)
at com.google.code.twig.standard.TranslatorObjectDatastore.load(TranslatorObjectDatastore.java:202)
at com.recruitmentlink.server.persistence.twig.TwigProfileImpl.getExistingCandidate(TwigProfileImpl.java:92)

Answer 1

这是 John Patterson 对这个问题和相关代码“修复”的( super 快速)回复，该代码“修复”抑制了这种不必要的“异常”

http://groups.google.com/group/twig-persist/browse_frm/thread/81b7d913a2ad37cc#

该问题仅影响使用 Java 7 的人。

由于 GAE 部署运行的是 Java 6，因此我们没有在现场看到问题。