I have an issue with serialization of Byte and Short types using GraphSONMapper
I am using default configuration of JanusGraph started by
docker run -it -p 8182:8182 janusgraph/janusgraph
and sample database The Graph of the Gods
Here is example with Short:
query = g.V().hasLabel('vertex_data_types').limit(1000).valueMap(true).toList();
mapper = GraphSONMapper.build().version(GraphSONVersion.V3_0).addRegistry(JanusGraphIoRegistry.instance()).create().createMapper();
mapper.writeValueAsString(query)
Full response:
gremlin> query = g.V().hasLabel('vertex_data_types').limit(1000).valueMap(true).toList();
==>{id=12520, label=vertex_data_types, test_short=[2], test_int=[5]}
gremlin> mapper = GraphSONMapper.build().version(GraphSONVersion.V3_0).addRegistry(JanusGraphIoRegistry.instance()).create().createMapper();
==>org.apache.tinkerpop.shaded.jackson.databind.ObjectMapper@789b15a4
gremlin> mapper.writeValueAsString(query)
Could not find a type identifier for the class : class java.lang.Short. Make sure the value to serialize has a type identifier registered for its class.
Type ':help' or ':h' for help.
Display stack trace? [yN]Y
java.lang.IllegalArgumentException: Could not find a type identifier for the class : class java.lang.Short. Make sure the value to serialize has a type identifier registered for its class.
at org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONTypeIdResolver.idFromValueAndType(GraphSONTypeIdResolver.java:82)
at org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONTypeSerializerV3d0.writeTypePrefix(GraphSONTypeSerializerV3d0.java:83)
at org.apache.tinkerpop.shaded.jackson.databind.ser.std.StdScalarSerializer.serializeWithType(StdScalarSerializer.java:44)
at org.apache.tinkerpop.shaded.jackson.databind.ser.impl.TypeWrappedSerializer.serialize(TypeWrappedSerializer.java:32)
at org.apache.tinkerpop.shaded.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480)
at org.apache.tinkerpop.shaded.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319)
at org.apache.tinkerpop.shaded.jackson.databind.ObjectMapper.writeValue(ObjectMapper.java:2656)
at org.apache.tinkerpop.shaded.jackson.core.base.GeneratorBase.writeObject(GeneratorBase.java:381)
at org.apache.tinkerpop.gremlin.structure.io.graphson.JavaUtilSerializersV3d0$ListJacksonSerializer.serialize(JavaUtilSerializersV3d0.java:127)
at org.apache.tinkerpop.gremlin.structure.io.graphson.JavaUtilSerializersV3d0$ListJacksonSerializer.serializeWithType(JavaUtilSerializersV3d0.java:135)
at org.apache.tinkerpop.gremlin.structure.io.graphson.JavaUtilSerializersV3d0$ListJacksonSerializer.serializeWithType(JavaUtilSerializersV3d0.java:118)
at org.apache.tinkerpop.shaded.jackson.databind.ser.impl.TypeWrappedSerializer.serialize(TypeWrappedSerializer.java:32)
at org.apache.tinkerpop.shaded.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480)
at org.apache.tinkerpop.shaded.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319)
at org.apache.tinkerpop.shaded.jackson.databind.ObjectMapper.writeValue(ObjectMapper.java:2656)
at org.apache.tinkerpop.shaded.jackson.core.base.GeneratorBase.writeObject(GeneratorBase.java:381)
at org.apache.tinkerpop.gremlin.structure.io.graphson.JavaUtilSerializersV3d0$MapJacksonSerializer.serialize(JavaUtilSerializersV3d0.java:59)
at org.apache.tinkerpop.gremlin.structure.io.graphson.JavaUtilSerializersV3d0$MapJacksonSerializer.serializeWithType(JavaUtilSerializersV3d0.java:67)
at org.apache.tinkerpop.gremlin.structure.io.graphson.JavaUtilSerializersV3d0$MapJacksonSerializer.serializeWithType(JavaUtilSerializersV3d0.java:49)
at org.apache.tinkerpop.shaded.jackson.databind.ser.impl.TypeWrappedSerializer.serialize(TypeWrappedSerializer.java:32)
at org.apache.tinkerpop.shaded.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480)
at org.apache.tinkerpop.shaded.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319)
at org.apache.tinkerpop.shaded.jackson.databind.ObjectMapper.writeValue(ObjectMapper.java:2656)
at org.apache.tinkerpop.shaded.jackson.core.base.GeneratorBase.writeObject(GeneratorBase.java:381)
at org.apache.tinkerpop.gremlin.structure.io.graphson.JavaUtilSerializersV3d0$ListJacksonSerializer.serialize(JavaUtilSerializersV3d0.java:127)
at org.apache.tinkerpop.gremlin.structure.io.graphson.JavaUtilSerializersV3d0$ListJacksonSerializer.serializeWithType(JavaUtilSerializersV3d0.java:135)
at org.apache.tinkerpop.gremlin.structure.io.graphson.JavaUtilSerializersV3d0$ListJacksonSerializer.serializeWithType(JavaUtilSerializersV3d0.java:118)
at org.apache.tinkerpop.shaded.jackson.databind.ser.impl.TypeWrappedSerializer.serialize(TypeWrappedSerializer.java:32)
at org.apache.tinkerpop.shaded.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480)
at org.apache.tinkerpop.shaded.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319)
at org.apache.tinkerpop.shaded.jackson.databind.ObjectMapper._configAndWriteValue(ObjectMapper.java:3906)
at org.apache.tinkerpop.shaded.jackson.databind.ObjectMapper.writeValueAsString(ObjectMapper.java:3220)
at org.apache.tinkerpop.shaded.jackson.databind.ObjectMapper$writeValueAsString.call(Unknown Source)
at Script64.run(Script64.groovy:1)
at org.apache.tinkerpop.gremlin.groovy.jsr223.GremlinGroovyScriptEngine.eval(GremlinGroovyScriptEngine.java:674)
at org.apache.tinkerpop.gremlin.groovy.jsr223.GremlinGroovyScriptEngine.eval(GremlinGroovyScriptEngine.java:376)
at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:233)
at org.apache.tinkerpop.gremlin.groovy.engine.GremlinExecutor.lambda$eval$0(GremlinExecutor.java:267)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
gremlin>
gremlin> g.getGraph().openManagement().printPropertyKeys()
==>------------------------------------------------------------------------------------------------
Property Key Name | Cardinality | Data Type |
---------------------------------------------------------------------------------------------------
test_short | SINGLE | class java.lang.Short |
test_int | SINGLE | class java.lang.Integer |
name | SINGLE | class java.lang.String |
age | SINGLE | class java.lang.Integer |
time | SINGLE | class java.lang.Integer |
reason | SINGLE | class java.lang.String |
place | SINGLE | class org.janusgraph.core.attribute.Geoshape |
---------------------------------------------------------------------------------------------------
Why GraphSONMapper not able to serialize Byte and Short data types? Does it needs any additional configurations?
GraphSON can serialiaze short and byte types. I asked this question in discussion tab on GitHub and received this link
Here is how my code looks now:
GraphSONMapper.
build().
typeInfo(org.apache.tinkerpop.gremlin.structure.io.graphson.TypeInfo.PARTIAL_TYPES).
addCustomModule(org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONXModuleV2d0.build().create(false)).
version(GraphSONVersion.V3_0).
addRegistry(JanusGraphIoRegistry.instance()).
create().
createMapper().
writeValueAsString(query)