Dependency(deps): Bump dev.langchain4j:langchain4j-bom from 1.16.3 to 1.20.0

[dependabot]

Bumps dev.langchain4j:langchain4j-bom from 1.16.3 to 1.20.0.

Release notes

Sourced from dev.langchain4j:langchain4j-bom's releases.

1.20.0 and 1.20.0-beta30

Notable Changes

Non-blocking / reactive support by @​dliubarskyi in langchain4j/langchain4j#5527

An AI Service method used to hold its thread for the whole interaction - the model call, tool execution, memory I/O and guardrails. It can now return CompletableFuture<T>/CompletionStage<T> for a single response, or Flow.Publisher<AiServiceStreamingEvent>/Flow.Publisher<String> for streaming, and the interaction runs without blocking a thread. You choose the mode by the method's return type; nothing else about the interface changes.

Non-blocking goes all the way down, because a blocking gap at any layer re-blocks the whole call: tool calling (sync and CompletableFuture tools, sequential or concurrent), chat memory, guardrails, and the full retrieval graph including EmbeddingModel, EmbeddingStore, ScoringModel and WebSearchEngine.

The work is additive and marked @Experimental: the synchronous and TokenStream APIs are untouched. A few defaults deliberately differ on the async path - multiple tool calls run concurrently, a tool execution error fails the invocation rather than being sent to the LLM, and a tool argument-parse error is sent to the LLM rather than failing. See Non-blocking and Reactive.

Jackson 3 opt-in support by @​dliubarskyi in langchain4j/langchain4j#6184

Add langchain4j-jackson3 to your classpath and LangChain4j's JSON runs on Jackson 3. There is nothing to configure and no API to call, and removing the dependency puts everything back on Jackson 2. Nothing changes for anyone who does not opt in.

With the opt-in in place, Jackson 2 can be excluded outright from most of the dependency graph; the modules that still need it are listed in the documentation. The one deliberate behaviour change is that a JSON failure surfaces as JsonReadException or JsonWriteException (both LangChain4jException) instead of a RuntimeException wrapping Jackson's own - catching RuntimeException works either way. See Using Jackson 3.

Other Changes

• fix: ignore stale and duplicate tool names when restoring tools found earlier by @​farzad-sedaghatbin in langchain4j/langchain4j#6080
• fix: consistent addAll/removeAll input handling across all embedding stores by @​subhashpolisetti in langchain4j/langchain4j#6069
• Fix Milvus vector lookup for IDs containing special characters by @​subhashpolisetti in langchain4j/langchain4j#6088
• Raise MCP JSON-RPC errors from list operations instead of NullPointerException by @​martin-zatopek-cloverdx in langchain4j/langchain4j#6072
• Avoid duplicate declaration of jsoup version by @​jmartisk in langchain4j/langchain4j#6092
• fix: Honor custom filter mapper in Azure Cosmos DB NoSQL token credential constructor by @​thswlsqls in langchain4j/langchain4j#5922
• fix: Add missing WHERE clause to filtered vector search in Azure Cosmos DB NoSQL store by @​thswlsqls in langchain4j/langchain4j#5921
• fix: Use the name of the provided Azure AI Search index when index creation is disabled by @​thswlsqls in langchain4j/langchain4j#5901
• fix: Escape single quotes in Azure AI Search metadata filter expressions by @​thswlsqls in langchain4j/langchain4j#5900
• Support customHeaders in OpenAI Responses API models by @​dliubarskyi in langchain4j/langchain4j#6101
• Fix invalid Chroma relevance scores for collections that do not use cosine distance by @​subhashpolisetti in langchain4j/langchain4j#6077
• fix: split text without detectable sentences instead of failing or dropping it by @​r0h1tb in langchain4j/langchain4j#6091
• Remove obsolete langchain4j-github-models module by @​jdubois in langchain4j/langchain4j#5692
• Fix Chroma V2 lookups to propagate real failures instead of treating them as absent by @​subhashpolisetti in langchain4j/langchain4j#6084
• fix:Throw ContentFilteredException when Chat Completions returns a refusal by @​subhashpolisetti in langchain4j/langchain4j#6114
• fix: report malformed JSON objects as OutputParsingException by @​Ayomipo18 in langchain4j/langchain4j#6110
• fix: numeric metadata filters no longer throw for NaN and Infinity by @​Tundesjaiyesmi in langchain4j/langchain4j#6108
• Azure AI Search: Expose bring-your-own index fields as metadata by @​subhashpolisetti in langchain4j/langchain4j#6022
• fix: Throw ContentFilteredException when the Responses API returns a ref… by @​subhashpolisetti in langchain4j/langchain4j#6121
• fix: Map an AiMessage without text and without tool calls instead of failing by @​subhashpolisetti in langchain4j/langchain4j#6123
• fix: ignore SSE events that arrive after an MCP operation was cancelled by @​dliubarskyi in langchain4j/langchain4j#6125
• fix: Override toBuilder, equals, hashCode and toString in WatsonxChatResponseMetadata by @​subhashpolisetti in langchain4j/langchain4j#6140
• fix: preserve Content.metadata when ReRankingContentAggregator re-ranks by @​zjh1252 in langchain4j/langchain4j#6129
• fix: make MIME type detection from file extensions locale-independent by @​dlwldn30 in langchain4j/langchain4j#6147
• fix(mcp): retain description on union-typed tool parameter schemas by @​lvcccc-sys in langchain4j/langchain4j#6133
• fix: throw typed exception for null-valued tool search query by @​farzad-sedaghatbin in langchain4j/langchain4j#6154
• fix(experimental-sql): escape CSV special characters in SqlDatabaseContentRetriever results by @​longingheart in langchain4j/langchain4j#6156
• fix: discover @​Tool methods on proxied tool objects by @​dliubarskyi in langchain4j/langchain4j#6169
• MCP: stop exposing and using Jackson types by @​dliubarskyi in langchain4j/langchain4j#6117
• docs: clarify Arize observability options by @​arizedatngo in langchain4j/langchain4j#6171
• fix(mcp): use UTF-8 for stdio and Docker transport streams by @​dlwldn30 in langchain4j/langchain4j#6178

... (truncated)

Commits

• 3a2f4dc Release versions 1.20.0 and 1.20.0-beta30
• affc81f feat(a2a): add @​A2ATenantId for multi-tenant agent routing (#6303)
• 02ff1cf Give SupervisorAgentIT's Invoice a toString, so its agent gets a usable prompt
• 883c74b Fix NullPointerException when completing a pending response with a null value...
• d08cadc Fix three Jackson 3 defects the nightly integration run found (#6301)
• f5133fe Make SupervisorAgentIT's Invoice constructible from the planner's arguments (...
• 6a49340 Jackson 3 opt-in support (#6184)
• 15f16f6 Upgrade mutiny-zero to 1.3.1 and drop the demand-decoupling workaround
• c0c2fd2 feat(document-parser-docling): DocumentRequest templates, async parsing, and ...
• 2f27d4c fix(agentic): include inherited fields in supervisor argument descriptions (#...
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Quality Gate passed

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