Default value for the null column? #14
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Thanks for the report, I'll have a look soon
…On Tue, 19 Dec. 2017, 05:01 kienllam, ***@***.***> wrote:
How can we handle the null value for the data mapping process? I'm getting
the encoding exception if the value of the column coming back from SQL
database is NULL.
org.springframework.core.codec.EncodingException: JSON encoding error:
(was java.lang.NullPointerException); nested exception is
com.fasterxml.jackson.databind.JsonMappingException: (was
java.lang.NullPointerException) (through reference chain:
java.util.ArrayList[0]->com.sun.proxy.$Proxy96["sales_dollars"])
at
org.springframework.http.codec.json.AbstractJackson2Encoder.encodeValue(AbstractJackson2Encoder.java:135)
~[spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at
org.springframework.http.codec.json.AbstractJackson2Encoder.lambda$encode$3(AbstractJackson2Encoder.java:108)
~[spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at
reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:107)
~[reactor-core-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at
reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1085)
~[reactor-core-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at
reactor.core.publisher.MonoCollectList$MonoBufferAllSubscriber.onComplete(MonoCollectList.java:117)
~[reactor-core-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at
io.reactivex.internal.util.HalfSerializer.onComplete(HalfSerializer.java:91)
~[rxjava-2.1.7.jar:na]
at
io.reactivex.internal.subscribers.StrictSubscriber.onComplete(StrictSubscriber.java:109)
~[rxjava-2.1.7.jar:na]
at
io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.drainLoop(FlowableFlatMap.java:426)
~[rxjava-2.1.7.jar:na]
at
io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.drain(FlowableFlatMap.java:366)
~[rxjava-2.1.7.jar:na]
at
io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.onComplete(FlowableFlatMap.java:338)
~[rxjava-2.1.7.jar:na]
at
io.reactivex.internal.subscriptions.DeferredScalarSubscription.complete(DeferredScalarSubscription.java:135)
~[rxjava-2.1.7.jar:na]
at
io.reactivex.internal.operators.single.SingleToFlowable$SingleToFlowableObserver.onSuccess(SingleToFlowable.java:63)
~[rxjava-2.1.7.jar:na]
at
io.reactivex.internal.operators.single.SingleMap$MapSingleObserver.onSuccess(SingleMap.java:64)
~[rxjava-2.1.7.jar:na]
at org.davidmoten.rx.pool.MemberSingle$Emitter.run(MemberSingle.java:528)
~[rxjava2-jdbc-0.1-RC23.jar:na]
at
io.reactivex.internal.schedulers.ExecutorScheduler$ExecutorWorker$BooleanRunnable.run(ExecutorScheduler.java:260)
~[rxjava-2.1.7.jar:na]
at
io.reactivex.internal.schedulers.ExecutorScheduler$ExecutorWorker.run(ExecutorScheduler.java:225)
~[rxjava-2.1.7.jar:na]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
~[na:1.8.0_131]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
~[na:1.8.0_131]
at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_131]
Caused by: com.fasterxml.jackson.databind.JsonMappingException: (was
java.lang.NullPointerException) (through reference chain:
java.util.ArrayList[0]->com.sun.proxy.$Proxy96["sales_dollars"])
at
com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:391)
~[jackson-databind-2.9.1.jar:2.9.1]
at
com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:351)
~[jackson-databind-2.9.1.jar:2.9.1]
at
com.fasterxml.jackson.databind.ser.std.StdSerializer.wrapAndThrow(StdSerializer.java:316)
~[jackson-databind-2.9.1.jar:2.9.1]
at
com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:727)
~[jackson-databind-2.9.1.jar:2.9.1]
at
com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:155)
~[jackson-databind-2.9.1.jar:2.9.1]
at
com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:145)
~[jackson-databind-2.9.1.jar:2.9.1]
at
com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:107)
~[jackson-databind-2.9.1.jar:2.9.1]
at
com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:25)
~[jackson-databind-2.9.1.jar:2.9.1]
at
com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480)
~[jackson-databind-2.9.1.jar:2.9.1]
at
com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:400)
~[jackson-databind-2.9.1.jar:2.9.1]
at
com.fasterxml.jackson.databind.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1392)
~[jackson-databind-2.9.1.jar:2.9.1]
at
com.fasterxml.jackson.databind.ObjectWriter._configAndWriteValue(ObjectWriter.java:1120)
~[jackson-databind-2.9.1.jar:2.9.1]
at
com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:950)
~[jackson-databind-2.9.1.jar:2.9.1]
at
org.springframework.http.codec.json.AbstractJackson2Encoder.encodeValue(AbstractJackson2Encoder.java:129)
~[spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
... 18 common frames omitted
Caused by: java.lang.NullPointerException: null
at com.sun.proxy.$Proxy96.sales_dollars(Unknown Source) ~[na:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
~[na:1.8.0_131]
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
~[na:1.8.0_131]
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
~[na:1.8.0_131]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_131]
at
com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:687)
~[jackson-databind-2.9.1.jar:2.9.1]
at
com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:719)
~[jackson-databind-2.9.1.jar:2.9.1]
... 28 common frames omitted
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RxJava 2 does not support null values in streams. You could wrap the value
in Optional or use some sentinel object that has a null meaning for you.
…On Tue, 19 Dec. 2017, 11:16 Dave Moten, ***@***.***> wrote:
Thanks for the report, I'll have a look soon
On Tue, 19 Dec. 2017, 05:01 kienllam, ***@***.***> wrote:
> How can we handle the null value for the data mapping process? I'm
> getting the encoding exception if the value of the column coming back from
> SQL database is NULL.
>
> org.springframework.core.codec.EncodingException: JSON encoding error:
> (was java.lang.NullPointerException); nested exception is
> com.fasterxml.jackson.databind.JsonMappingException: (was
> java.lang.NullPointerException) (through reference chain:
> java.util.ArrayList[0]->com.sun.proxy.$Proxy96["sales_dollars"])
> at
> org.springframework.http.codec.json.AbstractJackson2Encoder.encodeValue(AbstractJackson2Encoder.java:135)
> ~[spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
> at
> org.springframework.http.codec.json.AbstractJackson2Encoder.lambda$encode$3(AbstractJackson2Encoder.java:108)
> ~[spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
> at
> reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:107)
> ~[reactor-core-3.1.0.RELEASE.jar:3.1.0.RELEASE]
> at
> reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1085)
> ~[reactor-core-3.1.0.RELEASE.jar:3.1.0.RELEASE]
> at
> reactor.core.publisher.MonoCollectList$MonoBufferAllSubscriber.onComplete(MonoCollectList.java:117)
> ~[reactor-core-3.1.0.RELEASE.jar:3.1.0.RELEASE]
> at
> io.reactivex.internal.util.HalfSerializer.onComplete(HalfSerializer.java:91)
> ~[rxjava-2.1.7.jar:na]
> at
> io.reactivex.internal.subscribers.StrictSubscriber.onComplete(StrictSubscriber.java:109)
> ~[rxjava-2.1.7.jar:na]
> at
> io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.drainLoop(FlowableFlatMap.java:426)
> ~[rxjava-2.1.7.jar:na]
> at
> io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.drain(FlowableFlatMap.java:366)
> ~[rxjava-2.1.7.jar:na]
> at
> io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.onComplete(FlowableFlatMap.java:338)
> ~[rxjava-2.1.7.jar:na]
> at
> io.reactivex.internal.subscriptions.DeferredScalarSubscription.complete(DeferredScalarSubscription.java:135)
> ~[rxjava-2.1.7.jar:na]
> at
> io.reactivex.internal.operators.single.SingleToFlowable$SingleToFlowableObserver.onSuccess(SingleToFlowable.java:63)
> ~[rxjava-2.1.7.jar:na]
> at
> io.reactivex.internal.operators.single.SingleMap$MapSingleObserver.onSuccess(SingleMap.java:64)
> ~[rxjava-2.1.7.jar:na]
> at org.davidmoten.rx.pool.MemberSingle$Emitter.run(MemberSingle.java:528)
> ~[rxjava2-jdbc-0.1-RC23.jar:na]
> at
> io.reactivex.internal.schedulers.ExecutorScheduler$ExecutorWorker$BooleanRunnable.run(ExecutorScheduler.java:260)
> ~[rxjava-2.1.7.jar:na]
> at
> io.reactivex.internal.schedulers.ExecutorScheduler$ExecutorWorker.run(ExecutorScheduler.java:225)
> ~[rxjava-2.1.7.jar:na]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> ~[na:1.8.0_131]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> ~[na:1.8.0_131]
> at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_131]
> Caused by: com.fasterxml.jackson.databind.JsonMappingException: (was
> java.lang.NullPointerException) (through reference chain:
> java.util.ArrayList[0]->com.sun.proxy.$Proxy96["sales_dollars"])
> at
> com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:391)
> ~[jackson-databind-2.9.1.jar:2.9.1]
> at
> com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:351)
> ~[jackson-databind-2.9.1.jar:2.9.1]
> at
> com.fasterxml.jackson.databind.ser.std.StdSerializer.wrapAndThrow(StdSerializer.java:316)
> ~[jackson-databind-2.9.1.jar:2.9.1]
> at
> com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:727)
> ~[jackson-databind-2.9.1.jar:2.9.1]
> at
> com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:155)
> ~[jackson-databind-2.9.1.jar:2.9.1]
> at
> com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:145)
> ~[jackson-databind-2.9.1.jar:2.9.1]
> at
> com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:107)
> ~[jackson-databind-2.9.1.jar:2.9.1]
> at
> com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:25)
> ~[jackson-databind-2.9.1.jar:2.9.1]
> at
> com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480)
> ~[jackson-databind-2.9.1.jar:2.9.1]
> at
> com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:400)
> ~[jackson-databind-2.9.1.jar:2.9.1]
> at
> com.fasterxml.jackson.databind.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1392)
> ~[jackson-databind-2.9.1.jar:2.9.1]
> at
> com.fasterxml.jackson.databind.ObjectWriter._configAndWriteValue(ObjectWriter.java:1120)
> ~[jackson-databind-2.9.1.jar:2.9.1]
> at
> com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:950)
> ~[jackson-databind-2.9.1.jar:2.9.1]
> at
> org.springframework.http.codec.json.AbstractJackson2Encoder.encodeValue(AbstractJackson2Encoder.java:129)
> ~[spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
> ... 18 common frames omitted
> Caused by: java.lang.NullPointerException: null
> at com.sun.proxy.$Proxy96.sales_dollars(Unknown Source) ~[na:na]
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> ~[na:1.8.0_131]
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> ~[na:1.8.0_131]
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> ~[na:1.8.0_131]
> at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_131]
> at
> com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:687)
> ~[jackson-databind-2.9.1.jar:2.9.1]
> at
> com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:719)
> ~[jackson-databind-2.9.1.jar:2.9.1]
> ... 28 common frames omitted
>
> —
> You are receiving this because you are subscribed to this thread.
> Reply to this email directly, view it on GitHub
> <#14>, or mute the
> thread
> <https://github.com/notifications/unsubscribe-auth/AATa626SGkUeRyWR5UHZ2Xivu1wBYqnwks5tBq99gaJpZM4RF48o>
> .
>
|
|
README discusses nulls:
https://github.com/davidmoten/rxjava2-jdbc/blob/master/README.adoc#nulls
…On Tue, 19 Dec. 2017, 12:03 Dave Moten, ***@***.***> wrote:
RxJava 2 does not support null values in streams. You could wrap the value
in Optional or use some sentinel object that has a null meaning for you.
On Tue, 19 Dec. 2017, 11:16 Dave Moten, ***@***.***> wrote:
> Thanks for the report, I'll have a look soon
>
> On Tue, 19 Dec. 2017, 05:01 kienllam, ***@***.***> wrote:
>
>> How can we handle the null value for the data mapping process? I'm
>> getting the encoding exception if the value of the column coming back from
>> SQL database is NULL.
>>
>> org.springframework.core.codec.EncodingException: JSON encoding error:
>> (was java.lang.NullPointerException); nested exception is
>> com.fasterxml.jackson.databind.JsonMappingException: (was
>> java.lang.NullPointerException) (through reference chain:
>> java.util.ArrayList[0]->com.sun.proxy.$Proxy96["sales_dollars"])
>> at
>> org.springframework.http.codec.json.AbstractJackson2Encoder.encodeValue(AbstractJackson2Encoder.java:135)
>> ~[spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
>> at
>> org.springframework.http.codec.json.AbstractJackson2Encoder.lambda$encode$3(AbstractJackson2Encoder.java:108)
>> ~[spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
>> at
>> reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:107)
>> ~[reactor-core-3.1.0.RELEASE.jar:3.1.0.RELEASE]
>> at
>> reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1085)
>> ~[reactor-core-3.1.0.RELEASE.jar:3.1.0.RELEASE]
>> at
>> reactor.core.publisher.MonoCollectList$MonoBufferAllSubscriber.onComplete(MonoCollectList.java:117)
>> ~[reactor-core-3.1.0.RELEASE.jar:3.1.0.RELEASE]
>> at
>> io.reactivex.internal.util.HalfSerializer.onComplete(HalfSerializer.java:91)
>> ~[rxjava-2.1.7.jar:na]
>> at
>> io.reactivex.internal.subscribers.StrictSubscriber.onComplete(StrictSubscriber.java:109)
>> ~[rxjava-2.1.7.jar:na]
>> at
>> io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.drainLoop(FlowableFlatMap.java:426)
>> ~[rxjava-2.1.7.jar:na]
>> at
>> io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.drain(FlowableFlatMap.java:366)
>> ~[rxjava-2.1.7.jar:na]
>> at
>> io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.onComplete(FlowableFlatMap.java:338)
>> ~[rxjava-2.1.7.jar:na]
>> at
>> io.reactivex.internal.subscriptions.DeferredScalarSubscription.complete(DeferredScalarSubscription.java:135)
>> ~[rxjava-2.1.7.jar:na]
>> at
>> io.reactivex.internal.operators.single.SingleToFlowable$SingleToFlowableObserver.onSuccess(SingleToFlowable.java:63)
>> ~[rxjava-2.1.7.jar:na]
>> at
>> io.reactivex.internal.operators.single.SingleMap$MapSingleObserver.onSuccess(SingleMap.java:64)
>> ~[rxjava-2.1.7.jar:na]
>> at
>> org.davidmoten.rx.pool.MemberSingle$Emitter.run(MemberSingle.java:528)
>> ~[rxjava2-jdbc-0.1-RC23.jar:na]
>> at
>> io.reactivex.internal.schedulers.ExecutorScheduler$ExecutorWorker$BooleanRunnable.run(ExecutorScheduler.java:260)
>> ~[rxjava-2.1.7.jar:na]
>> at
>> io.reactivex.internal.schedulers.ExecutorScheduler$ExecutorWorker.run(ExecutorScheduler.java:225)
>> ~[rxjava-2.1.7.jar:na]
>> at
>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>> ~[na:1.8.0_131]
>> at
>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>> ~[na:1.8.0_131]
>> at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_131]
>> Caused by: com.fasterxml.jackson.databind.JsonMappingException: (was
>> java.lang.NullPointerException) (through reference chain:
>> java.util.ArrayList[0]->com.sun.proxy.$Proxy96["sales_dollars"])
>> at
>> com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:391)
>> ~[jackson-databind-2.9.1.jar:2.9.1]
>> at
>> com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:351)
>> ~[jackson-databind-2.9.1.jar:2.9.1]
>> at
>> com.fasterxml.jackson.databind.ser.std.StdSerializer.wrapAndThrow(StdSerializer.java:316)
>> ~[jackson-databind-2.9.1.jar:2.9.1]
>> at
>> com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:727)
>> ~[jackson-databind-2.9.1.jar:2.9.1]
>> at
>> com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:155)
>> ~[jackson-databind-2.9.1.jar:2.9.1]
>> at
>> com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:145)
>> ~[jackson-databind-2.9.1.jar:2.9.1]
>> at
>> com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:107)
>> ~[jackson-databind-2.9.1.jar:2.9.1]
>> at
>> com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:25)
>> ~[jackson-databind-2.9.1.jar:2.9.1]
>> at
>> com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480)
>> ~[jackson-databind-2.9.1.jar:2.9.1]
>> at
>> com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:400)
>> ~[jackson-databind-2.9.1.jar:2.9.1]
>> at
>> com.fasterxml.jackson.databind.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1392)
>> ~[jackson-databind-2.9.1.jar:2.9.1]
>> at
>> com.fasterxml.jackson.databind.ObjectWriter._configAndWriteValue(ObjectWriter.java:1120)
>> ~[jackson-databind-2.9.1.jar:2.9.1]
>> at
>> com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:950)
>> ~[jackson-databind-2.9.1.jar:2.9.1]
>> at
>> org.springframework.http.codec.json.AbstractJackson2Encoder.encodeValue(AbstractJackson2Encoder.java:129)
>> ~[spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
>> ... 18 common frames omitted
>> Caused by: java.lang.NullPointerException: null
>> at com.sun.proxy.$Proxy96.sales_dollars(Unknown Source) ~[na:na]
>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>> ~[na:1.8.0_131]
>> at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>> ~[na:1.8.0_131]
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>> ~[na:1.8.0_131]
>> at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_131]
>> at
>> com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:687)
>> ~[jackson-databind-2.9.1.jar:2.9.1]
>> at
>> com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:719)
>> ~[jackson-databind-2.9.1.jar:2.9.1]
>> ... 28 common frames omitted
>>
>> —
>> You are receiving this because you are subscribed to this thread.
>> Reply to this email directly, view it on GitHub
>> <#14>, or mute the
>> thread
>> <https://github.com/notifications/unsubscribe-auth/AATa626SGkUeRyWR5UHZ2Xivu1wBYqnwks5tBq99gaJpZM4RF48o>
>> .
>>
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How can we handle the null value for the data mapping process? I'm getting the encoding exception if the value of the column coming back from SQL database is NULL.
org.springframework.core.codec.EncodingException: JSON encoding error: (was java.lang.NullPointerException); nested exception is com.fasterxml.jackson.databind.JsonMappingException: (was java.lang.NullPointerException) (through reference chain: java.util.ArrayList[0]->com.sun.proxy.$Proxy96["sales_dollars"])
at org.springframework.http.codec.json.AbstractJackson2Encoder.encodeValue(AbstractJackson2Encoder.java:135) ~[spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.http.codec.json.AbstractJackson2Encoder.lambda$encode$3(AbstractJackson2Encoder.java:108) ~[spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:107) ~[reactor-core-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1085) ~[reactor-core-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at reactor.core.publisher.MonoCollectList$MonoBufferAllSubscriber.onComplete(MonoCollectList.java:117) ~[reactor-core-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at io.reactivex.internal.util.HalfSerializer.onComplete(HalfSerializer.java:91) ~[rxjava-2.1.7.jar:na]
at io.reactivex.internal.subscribers.StrictSubscriber.onComplete(StrictSubscriber.java:109) ~[rxjava-2.1.7.jar:na]
at io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.drainLoop(FlowableFlatMap.java:426) ~[rxjava-2.1.7.jar:na]
at io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.drain(FlowableFlatMap.java:366) ~[rxjava-2.1.7.jar:na]
at io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.onComplete(FlowableFlatMap.java:338) ~[rxjava-2.1.7.jar:na]
at io.reactivex.internal.subscriptions.DeferredScalarSubscription.complete(DeferredScalarSubscription.java:135) ~[rxjava-2.1.7.jar:na]
at io.reactivex.internal.operators.single.SingleToFlowable$SingleToFlowableObserver.onSuccess(SingleToFlowable.java:63) ~[rxjava-2.1.7.jar:na]
at io.reactivex.internal.operators.single.SingleMap$MapSingleObserver.onSuccess(SingleMap.java:64) ~[rxjava-2.1.7.jar:na]
at org.davidmoten.rx.pool.MemberSingle$Emitter.run(MemberSingle.java:528) ~[rxjava2-jdbc-0.1-RC23.jar:na]
at io.reactivex.internal.schedulers.ExecutorScheduler$ExecutorWorker$BooleanRunnable.run(ExecutorScheduler.java:260) ~[rxjava-2.1.7.jar:na]
at io.reactivex.internal.schedulers.ExecutorScheduler$ExecutorWorker.run(ExecutorScheduler.java:225) ~[rxjava-2.1.7.jar:na]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[na:1.8.0_131]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ~[na:1.8.0_131]
at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_131]
Caused by: com.fasterxml.jackson.databind.JsonMappingException: (was java.lang.NullPointerException) (through reference chain: java.util.ArrayList[0]->com.sun.proxy.$Proxy96["sales_dollars"])
at com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:391) ~[jackson-databind-2.9.1.jar:2.9.1]
at com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:351) ~[jackson-databind-2.9.1.jar:2.9.1]
at com.fasterxml.jackson.databind.ser.std.StdSerializer.wrapAndThrow(StdSerializer.java:316) ~[jackson-databind-2.9.1.jar:2.9.1]
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:727) ~[jackson-databind-2.9.1.jar:2.9.1]
at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:155) ~[jackson-databind-2.9.1.jar:2.9.1]
at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:145) ~[jackson-databind-2.9.1.jar:2.9.1]
at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:107) ~[jackson-databind-2.9.1.jar:2.9.1]
at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:25) ~[jackson-databind-2.9.1.jar:2.9.1]
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480) ~[jackson-databind-2.9.1.jar:2.9.1]
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:400) ~[jackson-databind-2.9.1.jar:2.9.1]
at com.fasterxml.jackson.databind.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1392) ~[jackson-databind-2.9.1.jar:2.9.1]
at com.fasterxml.jackson.databind.ObjectWriter._configAndWriteValue(ObjectWriter.java:1120) ~[jackson-databind-2.9.1.jar:2.9.1]
at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:950) ~[jackson-databind-2.9.1.jar:2.9.1]
at org.springframework.http.codec.json.AbstractJackson2Encoder.encodeValue(AbstractJackson2Encoder.java:129) ~[spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
... 18 common frames omitted
Caused by: java.lang.NullPointerException: null
at com.sun.proxy.$Proxy96.sales_dollars(Unknown Source) ~[na:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_131]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_131]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_131]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_131]
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:687) ~[jackson-databind-2.9.1.jar:2.9.1]
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:719) ~[jackson-databind-2.9.1.jar:2.9.1]
... 28 common frames omitted
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