Add langchain4j-interop: Spring AI 2.0 and LangChain4j 1.22 side by side

Same order assistant in both frameworks against a local fake OpenAI server: starter bean collision, wire differences, tool failure and loop bounds, observability meters, MCP-first tools, and a compile check of the 2025 article's snippets and Maven coordinates. Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01G8ikz8xdWuTP5yun8DZ1hk
2026-10-11 10:09:45 +00:00
parent d51ef56468
commit e79b75a105
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+# The original article's code, compiled against Spring AI 2.0.1 and LangChain4j 1.22.0 (one file per API line)
+
+OldCallAroundAdvisor: DOES NOT COMPILE
+    OldCallAroundAdvisor.java:1: error: cannot find symbol
+      symbol:   class AdvisedRequest
+      location: package org.springframework.ai.chat.client.advisor.api
+    OldCallAroundAdvisor.java:2: error: cannot find symbol
+      symbol:   class AdvisedResponse
+      location: package org.springframework.ai.chat.client.advisor.api
+OldChatService: compiles
+OldDocumentGetContent: DOES NOT COMPILE
+    OldDocumentGetContent.java:6: error: cannot find symbol
+      symbol:   method getContent()
+      location: variable d of type Document
+OldLangChain4jBuilder: DOES NOT COMPILE
+    OldLangChain4jBuilder.java:9: error: cannot find symbol
+      symbol:   method chatLanguageModel(OpenAiChatModel)
+      location: class AiServices<Agent>
+OldMessageGetContent: DOES NOT COMPILE
+    OldMessageGetContent.java:6: error: cannot find symbol
+      symbol:   method getContent()
+      location: variable m of type Message
+OldMeterRegistryCustomizer: DOES NOT COMPILE
+    OldMeterRegistryCustomizer.java:1: error: package org.springframework.boot.actuate.autoconfigure.metrics does not exist
+    OldMeterRegistryCustomizer.java:5: error: cannot find symbol
+      symbol:   class MeterRegistryCustomizer
+      location: class OldMeterRegistryCustomizer
+OldPdfConfig: compiles
+OldSearchRequest: DOES NOT COMPILE
+    OldSearchRequest.java:6: error: cannot find symbol
+      symbol:   method query(String)
+      location: class SearchRequest
+OldTokenTextSplitter: DOES NOT COMPILE
+    OldTokenTextSplitter.java:5: error: no suitable constructor found for TokenTextSplitter(int,int,int,int,boolean)
+
+# The original article's Maven coordinates, looked up on Maven Central
+
+org/springframework/ai/spring-ai-openai-spring-boot-starter: latest release none, latest of any kind 1.0.0-M6
+org/springframework/ai/spring-ai-pgvector-store-spring-boot-starter: latest release none, latest of any kind 1.0.0-M6
+org/springframework/ai/spring-ai-starter-model-openai: latest release 2.0.1, latest of any kind 2.1.0-M1
+org/springframework/ai/spring-ai-starter-vector-store-pgvector: latest release 2.0.1, latest of any kind 2.1.0-M1
+dev/langchain4j/langchain4j-spring-boot-starter: latest release 0.36.2, latest of any kind 1.22.0-beta32
+dev/langchain4j/langchain4j-open-ai: latest release 1.22.0, latest of any kind 1.22.0
+dev/langchain4j/langchain4j-spring-boot4-starter: latest release none, latest of any kind 1.22.0-beta32
+
+# Class names the original article used, searched in the jars this build resolves (mvn dependency:build-classpath)
+
+TokenBudgetAdvisor: not found in any jar
+RequestResponseAdvisor: not found in any jar
+CallAroundAdvisor: not found in any jar
+CallAdvisor: found
+ToolCallingAdvisor: found
+AdvisedRequest: not found in any jar
+ChatClientRequest: found
+EmbeddingClient: not found in any jar
+EmbeddingModel: found