Add java17 template

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

README.md

@@ -26,7 +26,8 @@ See: `faas-cli template store list` to see which templates are both: recommended
 | python3-debian | Python | 3 | Debian Linux | classic | [Legacy Python 3 Debian template](https://github.com/openfaas/templates/tree/master/template/python3-debian)
 | python27 | Python | 2.7.18 | Alpine Linux | classic | [Python 2.7 template (deprecated)](https://github.com/openfaas/templates/tree/master/template/python27)
 | java11-vert-x | Java and [Vert.x](https://vertx.io/) | 11 | Debian GNU/Linux | of-watchdog | [Java LTS template](https://github.com/openfaas/templates/tree/master/template/java11-vert-x)
-| java11 | Java | 11 | Debian GNU/Linux | of-watchdog | [Java LTS template](https://github.com/openfaas/templates/tree/master/template/java11)
+| java11 | Java | 11 | Debian GNU/Linux | of-watchdog | [Deprecated Java template](https://github.com/openfaas/templates/tree/master/template/java11)
+| java17 | Java | 11 | Debian GNU/Linux | of-watchdog | [Java LTS template](https://github.com/openfaas/templates/tree/master/template/java17)
 | ruby | Ruby | 3.3 | Alpine Linux | classic| [Ruby template](https://github.com/openfaas/templates/tree/master/template/ruby)
 | php7 | PHP | 7.4 | Alpine Linux | classic | [PHP 7 template](https://github.com/openfaas/templates/tree/master/template/php7)
 | php8 | PHP | 8.2 | Alpine Linux | classic | [PHP 8 template](https://github.com/openfaas/templates/tree/master/template/php8)

template/java17/Dockerfile

@@ -0,0 +1,61 @@
+FROM openjdk:17-jdk-slim AS builder
+
+ENV GRADLE_VER=7.6.3
+
+RUN apt-get update -qqy \
+  && apt-get install -qqy \
+   --no-install-recommends \
+   curl \
+   ca-certificates \
+   unzip
+
+RUN mkdir -p /opt/ && cd /opt/ \
+    && echo "Downloading gradle.." \
+    && curl -sSfL "https://services.gradle.org/distributions/gradle-${GRADLE_VER}-bin.zip" -o gradle-$GRADLE_VER-bin.zip \
+    && unzip gradle-$GRADLE_VER-bin.zip -d /opt/ \
+    && rm gradle-$GRADLE_VER-bin.zip
+
+# Export some environment variables
+ENV GRADLE_HOME=/opt/gradle-$GRADLE_VER/
+ENV PATH=$PATH:$GRADLE_HOME/bin
+
+RUN mkdir -p /home/app/libs
+
+ENV GRADLE_OPTS="-Dorg.gradle.daemon=false"
+WORKDIR /home/app
+
+COPY . /home/app/
+
+RUN gradle build --debug
+RUN find . 
+
+FROM ghcr.io/openfaas/of-watchdog:0.10.6 AS watchdog
+
+FROM openjdk:17-slim AS ship
+RUN apt-get update -qqy \
+  && apt-get install -qqy \
+   --no-install-recommends \
+   unzip
+RUN addgroup --system app \
+    && adduser --system --ingroup app app
+
+COPY --from=watchdog /fwatchdog /usr/bin/fwatchdog
+RUN chmod +x /usr/bin/fwatchdog
+
+WORKDIR /home/app
+COPY --from=builder /home/app/function/build/distributions/function-1.0.zip ./function-1.0.zip
+USER app
+RUN unzip ./function-1.0.zip
+
+WORKDIR /home/app/
+
+ENV upstream_url="http://127.0.0.1:8082"
+ENV mode="http"
+ENV CLASSPATH="/home/app/function-1.0/function-1.0.jar:/home/app/function-1.0/lib/*"
+
+ENV fprocess="java -XX:+UseContainerSupport com.openfaas.entrypoint.App"
+EXPOSE 8080
+
+HEALTHCHECK --interval=5s CMD [ -e /tmp/.lock ] || exit 1
+
+CMD ["fwatchdog"]

template/java17/README.md

@@ -0,0 +1,24 @@
+## Template: java24
+
+The Java11 template uses gradle as a build system.
+
+Gradle version: 5.5.1
+
+### Structure
+
+There are three projects which make up a single gradle build:
+
+- model - (Library) classes for parsing request/response
+- function - (Library) your function code as a developer, you will only ever see this folder
+- entrypoint - (App) HTTP server for re-using the JVM between requests
+
+### Handler
+
+The handler is written in the `./src/main/Handler.java` folder
+
+Tests are supported with junit via files in `./src/test`
+
+### External dependencies
+
+External dependencies can be specified in ./build.gradle in the normal way using jcenter, a local JAR or some other remote repository.
+

template/java17/build.gradle

@@ -0,0 +1,17 @@
+allprojects {
+    repositories {
+        jcenter() 
+    }
+}
+
+subprojects {
+    version = '1.0'
+}
+
+repositories {
+    jcenter()
+
+    flatDir {
+        dirs 'libs'
+    }
+}

template/java17/function/build.gradle

@@ -0,0 +1,79 @@
+plugins {
+    id 'java-library'
+    id 'distribution'
+    id 'maven-publish'
+}
+
+dependencies {
+    api 'org.apache.commons:commons-math3:3.6.1'
+    implementation 'com.google.guava:guava:23.0'
+    testImplementation 'junit:junit:4.12'
+    implementation 'com.openfaas:model:0.1.1'
+    implementation 'com.openfaas:entrypoint:0.1.0'
+}
+
+repositories {
+    mavenCentral()
+
+    flatDir {
+        dirs '../libs'
+    }
+}
+
+jar {
+    manifest {
+        attributes 'Implementation-Title': 'OpenFaaS Function',
+                   'Implementation-Version': '1.0'
+    }
+}
+
+distributions {
+    main {
+        contents {
+            from jar
+            into('lib') {
+                from(project.configurations.runtimeClasspath)
+            }
+        }
+    }
+}
+
+// Configure publishing with the maven-publish plugin
+publishing {
+    publications {
+        mavenJava(MavenPublication) {
+            from components.java
+            artifact jar
+
+            pom {
+                name.set('OpenFaaS Function')
+                description.set('An OpenFaaS function implementation.')
+                url.set('https://www.openfaas.com/')
+                licenses {
+                    license {
+                        name.set('MIT')
+                        url.set('https://opensource.org/licenses/MIT')
+                    }
+                }
+                developers {
+                    developer {
+                        id.set('openfaas')
+                        name.set('OpenFaaS Ltd')
+                        email.set('info@openfaas.com')
+                    }
+                }
+                scm {
+                    connection.set('scm:git:https://github.com/openfaas/templates.git')
+                    developerConnection.set('scm:git:https://github.com/openfaas/templates.git')
+                    url.set('https://github.com/openfaas/templates')
+                }
+            }
+        }
+    }
+
+    repositories {
+        flatDir {
+            dirs 'repos'
+        }
+    }
+}

template/java17/function/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.3-bin.zip
+networkTimeout=10000
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists