LangChain for Java Files

Highlights

• Add Docling Document Parser Integration by @lfelner22 in https://github.com/langchain4j/langchain4j/pull/4933
• Support setting default values for @Tool parameters by @dliubarskyi in https://github.com/langchain4j/langchain4j/pull/5146
• Allow an agent to select among different ChatModels + Introduce voting agentic pattern by @mariofusco in https://github.com/langchain4j/langchain4j/pull/5158
• Added new integration module langchain4j-google-genai by @Eainde in https://github.com/langchain4j/langchain4j/pull/4658

Other Changes

• Fix flaky OpenAiResponsesChatModelThinkingIT.should_return_reasoning_summary by @omatheusmesmo in https://github.com/langchain4j/langchain4j/pull/5076
• fix: read ReturnBehavior from ToolServiceContext in streaming handler by @Ivan97 in https://github.com/langchain4j/langchain4j/pull/5078
• fix: fall back to exception class name when tool error has no message by @PSchmitz-Valckenberg in https://github.com/langchain4j/langchain4j/pull/5088
• Add Spring Boot 4 dependencies to the langchain4j-bom by @arey in https://github.com/langchain4j/langchain4j/pull/5090
• feat: add customHeaders support to VertexAiGeminiChatModel by @brian-mulier-p in https://github.com/langchain4j/langchain4j/pull/5113
• feat: add customHeaders support to GoogleAiGeminiChatModel and GoogleAiGeminiStreamingChatModel by @brian-mulier-p in https://github.com/langchain4j/langchain4j/pull/5114
• feat: add customHeaders support to AnthropicChatModel and AnthropicStreamingChatModel by @PSchmitz-Valckenberg in https://github.com/langchain4j/langchain4j/pull/5101
• fix(ollama): add missing model card fields by @DragonFSKY in https://github.com/langchain4j/langchain4j/pull/5105
• feat: add customHeaders support to BedrockChatModel and BedrockStreamingChatModel by @brian-mulier-p in https://github.com/langchain4j/langchain4j/pull/5112
• fix(mistralai): null-guard MistralAiChatMessage.getContent() in aiMes… by @madaram in https://github.com/langchain4j/langchain4j/pull/5123
• fix(mcp-docker): apply SSLConfig to ApacheDockerHttpClient by @Malaydewangan09 in https://github.com/langchain4j/langchain4j/pull/5127
• Update dependency org.postgresql:postgresql to v42.7.11 [SECURITY] by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5118
• build(deps-dev): bump org.postgresql:postgresql from 42.7.7 to 42.7.11 in /experimental/langchain4j-experimental-sql by @dependabot[bot] in https://github.com/langchain4j/langchain4j/pull/5117
• Upgrade opennlp-tools to 2.5.9 by @aloubyansky in https://github.com/langchain4j/langchain4j/pull/5130
• fix(anthropic): map JsonObjectSchema definitions to $defs by @joshiste in https://github.com/langchain4j/langchain4j/pull/5131
• fix(tools): throw clear error when LLM omits a required primitive parameter by @dliubarskyi in https://github.com/langchain4j/langchain4j/pull/5143
• feat(#5141): Adds vector as Double Array conversion in Embeddings by @lordofthejars in https://github.com/langchain4j/langchain4j/pull/5145
• feat(open-ai): support custom embedding parameters by @DragonFSKY in https://github.com/langchain4j/langchain4j/pull/5154
• feat(vertex-ai-gemini): support request labels for billing/cost attribution by @ipeychev in https://github.com/langchain4j/langchain4j/pull/5151
• feat(ollama): add experimental image model by @DragonFSKY in https://github.com/langchain4j/langchain4j/pull/5157
• refactor: rename maxSequentialToolsInvocations to maxToolCallingRound… by @PSchmitz-Valckenberg in https://github.com/langchain4j/langchain4j/pull/5148
• Propagate the AgenticScope when calling the planner agent of the supervisor agentic pattern by @mariofusco in https://github.com/langchain4j/langchain4j/pull/5162
• feat: add per-tool strict schema enforcement on ToolSpecification by @pedrovieira in https://github.com/langchain4j/langchain4j/pull/5129
• fix(ollama): set content type for streaming requests by @DragonFSKY in https://github.com/langchain4j/langchain4j/pull/5165
• fix: Improve schema generation of polymorphic types and nested collections by @rakow in https://github.com/langchain4j/langchain4j/pull/5167
• fix: propagate Ollama streaming errors to handler onError by @HariTechLab in https://github.com/langchain4j/langchain4j/pull/5120
• build(deps): bump mermaid from 11.14.0 to 11.15.0 in /docs by @dependabot[bot] in https://github.com/langchain4j/langchain4j/pull/5164
• build(deps): bump @babel/plugin-transform-modules-systemjs from 7.25.9 to 7.29.4 in /docs by @dependabot[bot] in https://github.com/langchain4j/langchain4j/pull/5152
• build(deps): bump fast-uri from 3.1.0 to 3.1.2 in /docs by @dependabot[bot] in https://github.com/langchain4j/langchain4j/pull/5150
• docs: add embedding-based classification tutorial by @pony-maggie in https://github.com/langchain4j/langchain4j/pull/5111
• chore(deps): update dependency com.google.protobuf:protobuf-java-util to v3.25.9 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5132
• chore(deps): update dependency maven-wrapper to v3.3.4 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5169
• chore(deps): update dependency org.apache.maven.plugins:maven-failsafe-plugin to v3.5.5 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5170
• fix: correct spelling of 'outputAssessments' in GuardrailAssessmentSummary by @cmabdullah in https://github.com/langchain4j/langchain4j/pull/5059
• fix(open-ai): fail on multiple chat choices by @Genmin in https://github.com/langchain4j/langchain4j/pull/5077
• chore(deps): update dependency org.apache.maven.plugins:maven-surefire-plugin to v3.5.5 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5172
• chore(deps): update dependency maven to v3.9.15 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/4548
• chore(deps): update dependency org.apache.pdfbox:pdfbox to v3.0.7 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5173
• chore(deps): update dependency org.codehaus.mojo:flatten-maven-plugin to v1.7.3 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5174
• chore(deps): update dependency org.jacoco:jacoco-maven-plugin to v0.8.14 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5177
• update jackson by @dliubarskyi in https://github.com/langchain4j/langchain4j/pull/5175
• chore(deps): update dependency org.wiremock:wiremock-standalone to v3.13.2 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5179
• chore(deps): update dependency prism-react-renderer to v2.4.1 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5180
• chore(deps): update docusaurus monorepo to v3.10.1 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5181
• fix(deps): update dependency ch.qos.logback:logback-classic to v1.5.32 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5182
• fix(deps): update dependency com.aliyun.openservices:tablestore to v5.17.10 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5183
• fix(deps): update dependency com.oracle.coherence.ce:coherence-bom to v24.09.3 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5184
• fix(deps): update dependency com.qcloud:cos_api to v5.6.269 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5185
• chore(deps): update dependency org.codehaus.mojo:exec-maven-plugin to v3.6.3 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5200
• fix(deps): update dependency com.openai:openai-java to v4.35.0 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5202
• chore(deps): update dependency io.github.gitflow-incremental-builder:gitflow-incremental-builder to v4.6.0 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5191
• fix(deps): update dependency org.apache.pdfbox:pdfbox to v2.0.36 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5190
• fix(deps): update dependency commons-logging:commons-logging to v1.3.6 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5189
• fix(deps): update dependency commons-codec:commons-codec to v1.22.0 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5187
• chore(deps): update dependency org.apache.maven.plugins:maven-clean-plugin to v3.5.0 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5192
• chore(deps): update dependency org.apache.maven.plugins:maven-compiler-plugin to v3.15.0 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5193
• chore(deps): update dependency org.apache.maven.plugins:maven-enforcer-plugin to v3.6.2 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5194
• chore(deps): update dependency org.apache.maven.plugins:maven-gpg-plugin to v3.2.8 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5195
• chore(deps): update dependency org.apache.maven.plugins:maven-jar-plugin to v3.5.0 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5196
• chore(deps): update dependency org.apache.maven.plugins:maven-javadoc-plugin to v3.12.0 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5197
• chore(deps): update dependency org.apache.maven.plugins:maven-resources-plugin to v3.5.0 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5198
• chore(deps): update dependency org.apache.maven.plugins:maven-source-plugin to v3.4.0 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5199
• chore(deps): update dependency org.sonatype.central:central-publishing-maven-plugin to v0.10.0 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5201
• fix(deps): update dependency org.mockito:mockito-bom to v5.23.0 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5203
• fix(deps): update dependency org.mariadb.jdbc:mariadb-java-client to v3.5.8 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5205
• Add built-in tools support to unofficial OpenAI Responses models by @leochame in https://github.com/langchain4j/langchain4j/pull/5015
• fix(deps): update docling.version to v0.5.2 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5208
• fix(deps): update dependency org.testcontainers:testcontainers-bom to v2.0.5 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5207
• Valkey Documentation by @MatthiasHowellYopp in https://github.com/langchain4j/langchain4j/pull/5213
• fix(deps): update hibernate-orm monorepo to v7.3.4.final by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5211
• fix(deps): update dependency com.aliyun.openservices:tablestore to v5.17.11 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5210
• fix(deps): update junit-framework monorepo to v6.0.3 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5215
• fix(deps): update micrometer to v1.16.5 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5216
• fix(deps): update slf4j monorepo to v2.0.18 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5217
• chore(deps): update ai-mocks.version to v0.5.1 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5218
• chore(deps): update dependency com.jayway.jsonpath:json-path to v2.10.0 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5219
• chore(deps): update dependency docusaurus-lunr-search to v3.6.0 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5220
• chore(deps): update dependency org.jsoup:jsoup to v1.22.2 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5222
• chore(deps): update dependency org.opensearch:opensearch-testcontainers to v2.1.4 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5224
• fix(deps): update apache-poi monorepo to v5.5.1 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5230
• fix(deps): update ai.djl.version to v0.36.0 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5229
• fix: skip empty tool_calls sentinel chunk in OpenAI streaming accumulator by @Ivan97 in https://github.com/langchain4j/langchain4j/pull/5209
• fix(deps): update commonmark.version to v0.28.0 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5232
• fix(deps): update awaitility.version to v4.3.0 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5231
• fix(deps): update dependency com.couchbase.client:java-client to v3.11.2 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5233
• fix(deps): update dependency com.github.jsqlparser:jsqlparser to v4.9 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/5236

New Contributors

• @omatheusmesmo made their first contribution in https://github.com/langchain4j/langchain4j/pull/5076
• @PSchmitz-Valckenberg made their first contribution in https://github.com/langchain4j/langchain4j/pull/5088
• @brian-mulier-p made their first contribution in https://github.com/langchain4j/langchain4j/pull/5113
• @madaram made their first contribution in https://github.com/langchain4j/langchain4j/pull/5123
• @aloubyansky made their first contribution in https://github.com/langchain4j/langchain4j/pull/5130
• @lfelner22 made their first contribution in https://github.com/langchain4j/langchain4j/pull/4933
• @joshiste made their first contribution in https://github.com/langchain4j/langchain4j/pull/5131
• @lordofthejars made their first contribution in https://github.com/langchain4j/langchain4j/pull/5145
• @ipeychev made their first contribution in https://github.com/langchain4j/langchain4j/pull/5151
• @rakow made their first contribution in https://github.com/langchain4j/langchain4j/pull/5167
• @HariTechLab made their first contribution in https://github.com/langchain4j/langchain4j/pull/5120
• @pony-maggie made their first contribution in https://github.com/langchain4j/langchain4j/pull/5111
• @cmabdullah made their first contribution in https://github.com/langchain4j/langchain4j/pull/5059
• @Genmin made their first contribution in https://github.com/langchain4j/langchain4j/pull/5077
• @MatthiasHowellYopp made their first contribution in https://github.com/langchain4j/langchain4j/pull/5213
• @Eainde made their first contribution in https://github.com/langchain4j/langchain4j/pull/4658

Full Changelog: https://github.com/langchain4j/langchain4j/compare/1.14.1...1.15.0