Add Serializable to the user data.

[dfredell]

I was tasked with implementing a custom shiro sessionDAO so we can share user session between our DropWizard web application servers. I was getting java.io.NotSerializableException: com.auth0.json.mgmt.users.User errors so I tried a few different workarounds like using Jackson's ObjectMapper to serialize the data, but that had its own complications (mainly SimplePrincipalCollection.realmPrincipals didn't get serialized.)
With this change I'm now able to serialize my org.apache.shiro.session.mgt.SimpleSession and send it to other webservers to create a HA environment.

Here is the stacktrace I was getting (with -Dsun.io.serialization.extendedDebugInfo=true enabled)

WARN  [2018-11-30 18:36:31,949]: Unable to update session org.apache.shiro.session.mgt.SimpleSession,id=8f1713bc-b59f-49b5-b13d-1234567890 in the database
! java.io.NotSerializableException: com.auth0.json.mgmt.users.User
! - custom writeObject data (class "java.util.HashSet")
! - object (class "java.util.LinkedHashSet", [<PRINCIPAL REDACTED>, <SESSION REDACTED>, {access_token=<PRINCIPAL REDACTED>, id_token=<SESSION REDACTED>, refresh_token=null, sub=auth0|<ID REDACTED>, email_verified=true, updated_at=2018-11-30T18:36:17.534Z, nickname=<EMAIL REDACTED>, name=<EMAIL REDACTED>@certusoft.com, picture=https://s.gravatar.com/avatar/<AVATAR REDACTED>, email=<EMAIL REDACTED>@certusoft.com}, com.auth0.json.mgmt.users.User@49729f39, com.auth0.json.auth.UserInfo@3cd9b149, <EMAIL REDACTED>@certusoft.com, <EMAIL REDACTED>@certusoft.com:<EMAIL REDACTED>@certusoft.com:YES])
! - custom writeObject data (class "java.util.HashMap")
! - object (class "java.util.LinkedHashMap", {<OUR AUTH CLASS>_1=[<PRINCIPAL REDACTED>, <SESSION REDACTED>, {access_token=<PRINCIPAL REDACTED>, id_token=<SESSION REDACTED>, refresh_token=null, sub=auth0|<ID REDACTED>, email_verified=true, updated_at=2018-11-30T18:36:17.534Z, nickname=<EMAIL REDACTED>, name=<EMAIL REDACTED>@certusoft.com, picture=https://s.gravatar.com/avatar/<AVATAR REDACTED>, email=<EMAIL REDACTED>@certusoft.com}, com.auth0.json.mgmt.users.User@49729f39, com.auth0.json.auth.UserInfo@3cd9b149, <EMAIL REDACTED>@certusoft.com, <EMAIL REDACTED>@certusoft.com:<EMAIL REDACTED>@certusoft.com:YES]})
! - field (class "org.apache.shiro.subject.SimplePrincipalCollection", name: "realmPrincipals", type: "interface java.util.Map")
! - custom writeObject data (class "org.apache.shiro.subject.SimplePrincipalCollection")
! - object (class "org.apache.shiro.subject.SimplePrincipalCollection", <PRINCIPAL REDACTED>,<SESSION REDACTED>,{access_token=<PRINCIPAL REDACTED>, id_token=<SESSION REDACTED>, refresh_token=null, sub=auth0|<ID REDACTED>, email_verified=true, updated_at=2018-11-30T18:36:17.534Z, nickname=<EMAIL REDACTED>, name=<EMAIL REDACTED>@certusoft.com, picture=https://s.gravatar.com/avatar/<AVATAR REDACTED>, email=<EMAIL REDACTED>@certusoft.com},com.auth0.json.mgmt.users.User@49729f39,com.auth0.json.auth.UserInfo@3cd9b149,<EMAIL REDACTED>@certusoft.com,<EMAIL REDACTED>@certusoft.com:<EMAIL REDACTED>@certusoft.com:YES)
! - custom writeObject data (class "java.util.HashMap")
! - object (class "java.util.HashMap", {org.apache.shiro.subject.support.DefaultSubjectContext_PRINCIPALS_SESSION_KEY=<PRINCIPAL REDACTED>,<SESSION REDACTED>,{access_token=<PRINCIPAL REDACTED>, id_token=<SESSION REDACTED>, refresh_token=null, sub=auth0|<ID REDACTED>, email_verified=true, updated_at=2018-11-30T18:36:17.534Z, nickname=<EMAIL REDACTED>, name=<EMAIL REDACTED>@certusoft.com, picture=https://s.gravatar.com/avatar/<AVATAR REDACTED>, email=<EMAIL REDACTED>@certusoft.com},com.auth0.json.mgmt.users.User@49729f39,com.auth0.json.auth.UserInfo@3cd9b149,<EMAIL REDACTED>@certusoft.com,<EMAIL REDACTED>@certusoft.com:<EMAIL REDACTED>@certusoft.com:YES})
! - custom writeObject data (class "org.apache.shiro.session.mgt.SimpleSession")
! - root object (class "org.apache.shiro.session.mgt.SimpleSession", org.apache.shiro.session.mgt.SimpleSession,id=8f1713bc-b59f-49b5-b13d-7bd782be7c1e)
! at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1182)
! at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
! at java.util.HashSet.writeObject(HashSet.java:288)
! at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
! at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
! at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
! at java.lang.reflect.Method.invoke(Method.java:498)
! at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1128)
! at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)
! at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
! at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
! at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
! at java.util.LinkedHashMap.internalWriteEntries(LinkedHashMap.java:333)
! at java.util.HashMap.writeObject(HashMap.java:1363)
! at sun.reflect.GeneratedMethodAccessor48.invoke(Unknown Source)
! at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
! at java.lang.reflect.Method.invoke(Method.java:498)
! at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1128)
! at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)
! at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
! at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
! at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
! at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:441)
! at org.apache.shiro.subject.SimplePrincipalCollection.writeObject(SimplePrincipalCollection.java:274)
! at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
! at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
! at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
! at java.lang.reflect.Method.invoke(Method.java:498)
! at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1128)
! at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)
! at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
! at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
! at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
! at java.util.HashMap.internalWriteEntries(HashMap.java:1790)
! at java.util.HashMap.writeObject(HashMap.java:1363)
! at sun.reflect.GeneratedMethodAccessor48.invoke(Unknown Source)
! at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
! at java.lang.reflect.Method.invoke(Method.java:498)
! at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1128)
! at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)
! at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
! at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
! at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
! at org.apache.shiro.session.mgt.SimpleSession.writeObject(SimpleSession.java:461)

[lbalmaceda]

@dfredell do you think it would be fine to skip adding the serialVersionUID field?

[dfredell]

O ya totally fine. I'll remove them, one sec.

[dfredell]

Should I merge auth0's master into my branch so it passes code coverage?

[lbalmaceda]

Sure, go ahead and rebase 👍