feat : adds ollama-llama2 RAG sample

.github/workflows/rag-springai-ollama-llm.yml

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+name: rag-springai-ollama-llm CI Build
+
+on:
+  push:
+    paths:
+      - "rag-springai-ollama-llm/**"
+    branches: [main]
+  pull_request:
+    paths:
+      - "rag-springai-ollama-llm/**"
+    types:
+      - opened
+      - synchronize
+      - reopened
+
+jobs:
+  build:
+    name: Run Unit & Integration Tests
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: rag-springai-ollama-llm
+    strategy:
+      matrix:
+        distribution: [ 'temurin' ]
+        java: [ '21' ]
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 # Shallow clones should be disabled for a better relevancy of analysis
+
+      - name: Set up JDK ${{ matrix.java }}
+        uses: actions/[email protected]
+        with:
+          java-version: ${{ matrix.java }}
+          distribution: ${{ matrix.distribution }}
+          cache: 'maven'
+      - name: Build and analyze
+        run: ./mvnw clean verify

rag-springai-ollama-llm/.gitignore

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+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/

rag-springai-ollama-llm/.mvn/wrapper/maven-wrapper.properties

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+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.6/apache-maven-3.9.6-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar

rag-springai-ollama-llm/ReadMe.md

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+# Getting Started
+
+The use of the pgvector store with the ollama model is not feasible due to the generation of 4096 dimensions by the latter, which exceeds pg vector's indexing support limit of less than 2000 dimensions. This limitation hinders the ease of querying the embedding store due to the absence of indexing.
+
+### Testcontainers support
+
+This project uses [Testcontainers at development time](https://docs.spring.io/spring-boot/docs/3.2.4/reference/html/features.html#features.testing.testcontainers.at-development-time).
+
+Testcontainers has been configured to use the following Docker images:
+
+* [`pgvector/pgvector:pg16`](https://hub.docker.com/r/pgvector/pgvector)
+
+Please review the tags of the used images and set them to the same as you're running in production.