feat(java): genkit java

.github/labeler.yml

@@ -54,6 +54,13 @@ js:
           - "**/package.json"
           - "js/**"
 
+java:
+  - changed-files:
+      - any-glob-to-any-file:
+          - "**/*.java"
+          - "**/pom.xml"
+          - "java/**"
+
 tooling:
   - changed-files:
       - any-glob-to-any-file:

.github/workflows/java.yml

@@ -0,0 +1,70 @@
+# Copyright 2025 Google LLC
+#
+# Licensed 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.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+name: Java tests and checks
+
+on:
+  pull_request:
+    paths:
+      - "java/**"
+      - "genkit-tools/**"
+      - ".github/workflows/java.yml"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        java-version: ['17', '21']
+    steps:
+      - name: Checkout Repo
+        uses: actions/checkout@v4
+
+      - name: Set up JDK ${{ matrix.java-version }}
+        uses: actions/setup-java@v4
+        with:
+          java-version: ${{ matrix.java-version }}
+          distribution: 'temurin'
+          cache: 'maven'
+
+      - name: Build with Maven
+        run: mvn -B clean compile -q
+        working-directory: ./java
+
+      - name: Run tests
+        run: mvn -B test
+        working-directory: ./java
+
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repo
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+          cache: 'maven'
+
+      - name: Check code formatting with Spotless
+        run: mvn -B spotless:check
+        working-directory: ./java
+
+      - name: Run Checkstyle
+        run: mvn -B checkstyle:check
+        working-directory: ./java

.gitignore

@@ -68,3 +68,17 @@ next-env.d.ts
 # Code Coverage
 js/plugins/compat-oai/coverage/
 
+# Java
+java/**/target/
+java/**/*.class
+java/**/*.jar
+java/**/*.war
+java/**/*.ear
+java/**/.classpath
+java/**/.project
+java/**/.settings/
+java/**/*.iml
+java/**/.genkit
+*.log
+hs_err_pid*
+java/samples/google-genai/generated_media/

genkit-tools/common/src/utils/utils.ts

@@ -37,13 +37,17 @@ export async function findProjectRoot(): Promise<string> {
     const goModPath = path.join(currentDir, 'go.mod');
     const pyprojectPath = path.join(currentDir, 'pyproject.toml');
     const pyproject2Path = path.join(currentDir, 'requirements.txt');
+    const javaPomPath = path.join(currentDir, 'pom.xml');
+    const javaBuildGradlePath = path.join(currentDir, 'build.gradle');
 
     try {
       const [
         packageJsonExists,
         goModExists,
         pyprojectExists,
         pyproject2Exists,
+        javaPomExists,
+        javaBuildGradleExists,
       ] = await Promise.all([
         fs
           .access(packageJsonPath)
@@ -61,12 +65,22 @@ export async function findProjectRoot(): Promise<string> {
           .access(pyproject2Path)
           .then(() => true)
           .catch(() => false),
+        fs
+          .access(javaPomPath)
+          .then(() => true)
+          .catch(() => false),
+        fs
+          .access(javaBuildGradlePath)
+          .then(() => true)
+          .catch(() => false),
       ]);
       if (
         packageJsonExists ||
         goModExists ||
         pyprojectExists ||
-        pyproject2Exists
+        pyproject2Exists ||
+        javaPomExists ||
+        javaBuildGradleExists
       ) {
         return currentDir;
       }