Tinkerpop 正在注册自定义 class kryo

Question

我正在尝试将 java.util.GregorianCalendar class 添加到 Apache tinkerpop 3.3.3 上的 kryo 序列化程序。为了防止以下异常发生

Exception in thread "main" java.lang.IllegalArgumentException: Class is not registered: java.util.GregorianCalendar
Note: To register this class use: kryo.register(java.util.GregorianCalendar.class);
    at org.apache.tinkerpop.shaded.kryo.Kryo.getRegistration(Kryo.java:484)
    at org.apache.tinkerpop.gremlin.structure.io.gryo.AbstractGryoClassResolver.writeClass(AbstractGryoClassResolver.java:110)
    at org.apache.tinkerpop.shaded.kryo.Kryo.writeClass(Kryo.java:514)
    at org.apache.tinkerpop.shaded.kryo.Kryo.writeClassAndObject(Kryo.java:619)
    at org.apache.tinkerpop.gremlin.structure.io.gryo.kryoshim.shaded.ShadedKryoAdapter.writeClassAndObject(ShadedKryoAdapter.java:49)
    at org.apache.tinkerpop.gremlin.structure.io.gryo.kryoshim.shaded.ShadedKryoAdapter.writeClassAndObject(ShadedKryoAdapter.java:24)

由于 tinkerpop 使用某种 "shaded" kryo 版本，我根本无法调用 kryo.register()。到目前为止我试过了

GryoMapper mapper =
GryoMapper.build().addCustom(java.util.GregorianCalendar.class).create();
List l = mapper.getRegisteredClasses();

并且能够观察到 java.util.GregorianCalendar 已注册。但是我不知道接下来我应该做什么来使用这个自定义映射器我检查了 javadocs 并得到 confused.I 也使用下面的代码将 TinkerGraph 实例写入文件。任何帮助将不胜感激。

this.graph.io(IoCore.gryo()).writeGraph(filePath);

Answer 1

我想如果你有一个 GryoMapper 实例，那么我会像这样直接实例化 GryoWriter：

File file = new File("C:/myfile.txt");
OutputStream fos = new FileOutputStream(file);
GryoMapper mapper = GryoMapper.build().addCustom(java.util.GregorianCalendar.class).create()
GryoWriter writer = GryoWriter.build().mapper(mapper).create()
writer.writeGraph(fos, graph)

Tinkerpop 正在注册自定义 class kryo

Tinkerpop registering custom class kryo

java

serialization

kryo

tinkerpop3