mvn.cmd : WARNING: A restricted method in java.lang.System has been called
At line:5 char:1
+ & $mvn -B test *> run.txt
+ ~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (WARNING: A rest...has been called:String) [], RemoteException
    + FullyQualifiedErrorId : NativeCommandError
 
WARNING: java.lang.System::load has been called by org.fusesource.jansi.internal.JansiLoader in an unnamed module 
(file:/C:/Users/Ankur/ankurm-blog-tools/apache-maven-3.9.9/lib/jansi-2.4.1.jar)
WARNING: Use --enable-native-access=ALL-UNNAMED to avoid a warning for callers in this module
WARNING: Restricted methods will be blocked in a future release unless native access is enabled

WARNING: A terminally deprecated method in sun.misc.Unsafe has been called
WARNING: sun.misc.Unsafe::objectFieldOffset has been called by 
com.google.common.util.concurrent.AbstractFuture$UnsafeAtomicHelper 
(file:/C:/Users/Ankur/ankurm-blog-tools/apache-maven-3.9.9/lib/guava-33.2.1-jre.jar)
WARNING: Please consider reporting this to the maintainers of class 
com.google.common.util.concurrent.AbstractFuture$UnsafeAtomicHelper
WARNING: sun.misc.Unsafe::objectFieldOffset will be removed in a future release
[INFO] Scanning for projects...
[INFO] 
[INFO] ----------------< com.ankurm.ai:spring-ai-2-migration >-----------------
[INFO] Building Spring AI 1.x to 2.0 migration 1.0.0
[INFO]   from pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- resources:3.5.0:resources (default-resources) @ spring-ai-2-migration ---
[INFO] skip non existing resourceDirectory C:\Users\Ankur\ankurm-blog-tools\projects\spring-ai-2-migration\src\main\resources
[INFO] skip non existing resourceDirectory C:\Users\Ankur\ankurm-blog-tools\projects\spring-ai-2-migration\src\main\resources
[INFO] 
[INFO] --- compiler:3.15.0:compile (default-compile) @ spring-ai-2-migration ---
[INFO] Nothing to compile - all classes are up to date.
[INFO] 
[INFO] --- resources:3.5.0:testResources (default-testResources) @ spring-ai-2-migration ---
[INFO] skip non existing resourceDirectory C:\Users\Ankur\ankurm-blog-tools\projects\spring-ai-2-migration\src\test\resources
[INFO] 
[INFO] --- compiler:3.15.0:testCompile (default-testCompile) @ spring-ai-2-migration ---
[INFO] Recompiling the module because of changed source code.
[INFO] Compiling 1 source file with javac [debug parameters release 25] to target\test-classes
[INFO] 
[INFO] --- surefire:3.5.6:test (default-test) @ spring-ai-2-migration ---
[INFO] Using auto detected provider org.apache.maven.surefire.junitplatform.JUnitPlatformProvider
[INFO] 
[INFO] -------------------------------------------------------
[INFO]  T E S T S
[INFO] -------------------------------------------------------
[INFO] Running com.ankurm.ai.ChatMemoryMigrationTest

==============================================================================
4. Proving isolation, now that explicit ids are the only path
==============================================================================
  bob's prompt: USER      what did you hear?

>> Passing distinct ids keeps the conversations separate -- and in 2.0
>> there is no longer a way NOT to pass one. Under 1.x the same code
>> with the ids omitted would have compiled, put alice and bob in the
>> shared 'default' conversation, and failed this assertion silently.

==============================================================================
1. ChatMemory.DEFAULT_CONVERSATION_ID has been removed
==============================================================================
  public constants on ChatMemory : [CONVERSATION_ID]
  
  Note the survivor is CONVERSATION_ID, the metadata key you use to PASS an id.
  The removed one was DEFAULT_CONVERSATION_ID, the value 'default' used when you
  passed nothing. Same prefix, opposite meaning -- so 'fixing' the compile error by
  swapping one for the other restores exactly the shared-conversation behaviour
  that removing it was meant to take away.

==============================================================================
2. PromptChatMemoryAdvisor has been removed
==============================================================================
  PromptChatMemoryAdvisor : ClassNotFoundException (as expected in 2.0)
  MessageChatMemoryAdvisor: org.springframework.ai.chat.client.advisor.MessageChatMemoryAdvisor
  
  Replacement is MessageChatMemoryAdvisor. The difference is not cosmetic: the
  removed one injected history into the SYSTEM PROMPT as text, the replacement
  adds it as real Message objects. Providers treat those differently, so expect
  your prompts -- and your token counts -- to change on migration.

==============================================================================
5. Direct ChatMemory use, for the storage-layer migration
==============================================================================
  stored: first
  stored: second
  after clear: 0 messages

>> If you use a JDBC/Cassandra/Mongo/Neo4j ChatMemoryRepository, note a
>> separate 2.0 change: retrieved messages now carry a creation
>> timestamp in metadata, so a message read back is NOT equals() to an
>> identical one built in code. Any test or cache keyed on Message
>> equality, or storing Messages in a Set, will change behaviour.

==============================================================================
3. The conversation ID is now required, per request
==============================================================================
  turn 1 -- conversation 'user-42'
  turn 2 -- same conversation
  messages the model received on turn 2 : 3
     USER      my name is Ankur
     ASSISTANT hello back
     USER      what is my name?

>> The id travels as an advisor PARAM per request, not as builder state.
>> This form already existed in 1.x; 2.0 removes the alternatives, so it
>> is now the only option. That suits how the id is actually scoped: in a
>> web app it is per user or per session, and therefore cannot sensibly
>> be baked into a singleton ChatClient.
[INFO] Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.336 s -- in com.ankurm.ai.ChatMemoryMigrationTest
[INFO] 
[INFO] Results:
[INFO] 
[INFO] Tests run: 5, Failures: 0, Errors: 0, Skipped: 0
[INFO] 
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  3.939 s
[INFO] Finished at: 2026-08-01T10:50:45+05:30
[INFO] ------------------------------------------------------------------------