From b3bcc8af1428a137a1a553347f2f9bc24b6355f3 Mon Sep 17 00:00:00 2001
From: Nitishkumar Singh <nitishkumarsingh71@gmail.com>
Date: Sat, 19 Dec 2020 19:07:06 +0530
Subject: [PATCH] included support of java 11 with maven

Signed-off-by: Nitishkumar Singh <nitishkumarsingh71@gmail.com>
---
 .gitignore                                    |   1 +
 README.md                                     |   1 +
 template/java11-maven/Dockerfile              |  57 ++++++++++
 template/java11-maven/README.md               |  24 ++++
 template/java11-maven/function/pom.xml        | 104 ++++++++++++++++++
 .../function/src/assembly/dep.xml             |  17 +++
 .../java/com/openfaas/function/Handler.java   |  16 +++
 .../com/openfaas/function/HandlerTest.java    |  14 +++
 template/java11-maven/pom.xml                 |  12 ++
 template/java11-maven/template.yml            |   4 +
 10 files changed, 250 insertions(+)
 create mode 100644 template/java11-maven/Dockerfile
 create mode 100644 template/java11-maven/README.md
 create mode 100644 template/java11-maven/function/pom.xml
 create mode 100644 template/java11-maven/function/src/assembly/dep.xml
 create mode 100644 template/java11-maven/function/src/main/java/com/openfaas/function/Handler.java
 create mode 100644 template/java11-maven/function/src/test/java/com/openfaas/function/HandlerTest.java
 create mode 100644 template/java11-maven/pom.xml
 create mode 100644 template/java11-maven/template.yml

diff --git a/.gitignore b/.gitignore
index 06ce87ad..f2c4c72b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@ build
 .idea
 **/bin/**
 .settings
+target
\ No newline at end of file
diff --git a/README.md b/README.md
index 638b5d49..01794978 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,7 @@ This repository contains the Classic OpenFaaS templates, but many more are avail
 | python | Python | 2.7 | Alpine Linux | classic | [Python 2.7 template](https://github.com/openfaas/templates/tree/master/template/python)
 | 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)
 | java11 | Java | 11 | Debian GNU/Linux | of-watchdog | [Java LTS template](https://github.com/openfaas/templates/tree/master/template/java11)
+| java11-maven | Java | 11 | Debian GNU/Linux | of-watchdog | [Java Maven LTS template](https://github.com/openfaas/templates/tree/master/template/java11-maven)
 | ruby | Ruby | 2.7 | Alpine Linux 3.11 | classic| [Ruby template](https://github.com/openfaas/templates/tree/master/template/ruby)
 | php7 | PHP | 7.2 | Alpine Linux | classic | [PHP 7 template](https://github.com/openfaas/templates/tree/master/template/php7)
 | csharp | C# | N/A | Debian GNU/Linux 9 | classic | [C# template](https://github.com/openfaas/templates/tree/master/template/csharp)
diff --git a/template/java11-maven/Dockerfile b/template/java11-maven/Dockerfile
new file mode 100644
index 00000000..066f9a24
--- /dev/null
+++ b/template/java11-maven/Dockerfile
@@ -0,0 +1,57 @@
+FROM openjdk:11-jdk-slim as builder
+
+ENV MAVEN_VER=3.6.3
+RUN apt-get update -qqy \
+  && apt-get install -qqy \
+   --no-install-recommends \
+   curl \
+   ca-certificates \
+   unzip
+
+RUN mkdir -p /opt/ && cd /opt/ \
+    && echo "Downloading maven.." \
+    && curl -sSfL "https://mirrors.estointernet.in/apache/maven/maven-3/${MAVEN_VER}/binaries/apache-maven-${MAVEN_VER}-bin.zip" -o apache-maven-$MAVEN_VER-bin.zip \
+    && unzip apache-maven-$MAVEN_VER-bin.zip -d /opt/ \
+    && rm apache-maven-$MAVEN_VER-bin.zip
+
+# Export some environment variables
+ENV MAVEN_HOME=/opt/apache-maven-$MAVEN_VER/
+ENV PATH=$PATH:$MAVEN_HOME/bin
+
+WORKDIR /home/app
+
+COPY . /home/app/
+
+RUN mvn clean package
+RUN find . 
+
+FROM openfaas/of-watchdog:0.7.6 as watchdog
+
+FROM openjdk:11-jre-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/target/function-0.1.0-bin.zip ./function-0.1.0.zip
+user app
+RUN unzip ./function-0.1.0.zip
+
+WORKDIR /home/app/
+
+ENV upstream_url="http://127.0.0.1:8082"
+ENV mode="http"
+ENV CLASSPATH="/home/app/function-0.1.0/function-0.1.0.jar:/home/app/function-0.1.0/lib/*"
+
+ENV fprocess="java -XX:+UseContainerSupport com.openfaas.entrypoint.App"
+EXPOSE 8080
+
+HEALTHCHECK --interval=5s CMD [ -e /tmp/.lock ] || exit 1
+
+CMD ["fwatchdog"]
\ No newline at end of file
diff --git a/template/java11-maven/README.md b/template/java11-maven/README.md
new file mode 100644
index 00000000..f95b450a
--- /dev/null
+++ b/template/java11-maven/README.md
@@ -0,0 +1,24 @@
+## Template: java11
+
+The Java11 template uses maven as a build system.
+
+Maven version: 5.5.1
+
+### Structure
+
+There are three projects which make up a single maven 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 ./pom.xml in the normal way using Maven Repository, a local JAR or some other remote repository.
+
diff --git a/template/java11-maven/function/pom.xml b/template/java11-maven/function/pom.xml
new file mode 100644
index 00000000..2ca9f107
--- /dev/null
+++ b/template/java11-maven/function/pom.xml
@@ -0,0 +1,104 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.openfaas</groupId>
+    <artifactId>function</artifactId>
+    <packaging>jar</packaging>
+    <version>0.1.0</version>
+    <properties>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+        <openfaas.model.version>0.1.1</openfaas.model.version>
+        <openfaas.entrypoint.version>0.1.0</openfaas.entrypoint.version>
+        <junit.version>4.13.1</junit.version>
+        <maven.shade.plugin>3.2.4</maven.shade.plugin>
+        <maven.compiler.plugin.version>3.8.1</maven.compiler.plugin.version>
+        <maven.assembly.plugin.version>2.5.3</maven.assembly.plugin.version>
+    </properties>
+
+    <dependencies>
+        <!-- https://mvnrepository.com/artifact/com.openfaas/model -->
+        <dependency>
+            <groupId>com.openfaas</groupId>
+            <artifactId>model</artifactId>
+            <version>${openfaas.model.version}</version>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/com.openfaas/entrypoint -->
+        <dependency>
+            <groupId>com.openfaas</groupId>
+            <artifactId>entrypoint</artifactId>
+            <version>${openfaas.entrypoint.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>${junit.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>${maven.compiler.plugin.version}</version>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-dependency-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>copy-dependencies</id>
+                        <phase>prepare-package</phase>
+                        <goals>
+                            <goal>copy-dependencies</goal>
+                        </goals>
+                        <configuration>
+                            <outputDirectory>${project.build.directory}/lib</outputDirectory>
+                            <overWriteReleases>false</overWriteReleases>
+                            <overWriteSnapshots>false</overWriteSnapshots>
+                            <overWriteIfNewer>true</overWriteIfNewer>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <!-- <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>${maven.shade.plugin}</version>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <transformers>
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                                    <mainClass>com.openfaas.function.Handler</mainClass>
+                                </transformer>
+                            </transformers>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin> -->
+            <plugin>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <version>${maven.assembly.plugin.version}</version>
+                <configuration>
+                    <descriptor>src/assembly/dep.xml</descriptor>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>create-archive</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>single</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>
\ No newline at end of file
diff --git a/template/java11-maven/function/src/assembly/dep.xml b/template/java11-maven/function/src/assembly/dep.xml
new file mode 100644
index 00000000..0bc5c944
--- /dev/null
+++ b/template/java11-maven/function/src/assembly/dep.xml
@@ -0,0 +1,17 @@
+<assembly xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2 http://maven.apache.org/xsd/assembly-1.1.2.xsd">
+<id>bin</id>
+<formats>
+  <format>zip</format>
+</formats>
+<fileSets>
+  <fileSet>
+    <directory>${project.build.directory}</directory>
+    <outputDirectory>/</outputDirectory>
+    <includes>
+      <include>*.jar</include>
+      <include>lib/</include>
+    </includes>
+  </fileSet>
+</fileSets>
+</assembly>
\ No newline at end of file
diff --git a/template/java11-maven/function/src/main/java/com/openfaas/function/Handler.java b/template/java11-maven/function/src/main/java/com/openfaas/function/Handler.java
new file mode 100644
index 00000000..0aec2aaa
--- /dev/null
+++ b/template/java11-maven/function/src/main/java/com/openfaas/function/Handler.java
@@ -0,0 +1,16 @@
+package com.openfaas.function;
+
+import com.openfaas.model.IHandler;
+import com.openfaas.model.IResponse;
+import com.openfaas.model.IRequest;
+import com.openfaas.model.Response;
+
+public class Handler extends com.openfaas.model.AbstractHandler {
+
+    public IResponse Handle(IRequest req) {
+        Response res = new Response();
+	    res.setBody("Hello, world!");
+
+	    return res;
+    }
+}
diff --git a/template/java11-maven/function/src/test/java/com/openfaas/function/HandlerTest.java b/template/java11-maven/function/src/test/java/com/openfaas/function/HandlerTest.java
new file mode 100644
index 00000000..26493e28
--- /dev/null
+++ b/template/java11-maven/function/src/test/java/com/openfaas/function/HandlerTest.java
@@ -0,0 +1,14 @@
+package com.openfaas.function;
+
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+import com.openfaas.function.Handler;
+import com.openfaas.model.IHandler;
+
+public class HandlerTest {
+    @Test public void handlerIsNotNull() {
+        IHandler handler = new Handler();
+        assertTrue("Expected handler not to be null", handler != null);
+    }
+}
diff --git a/template/java11-maven/pom.xml b/template/java11-maven/pom.xml
new file mode 100644
index 00000000..d099d9e1
--- /dev/null
+++ b/template/java11-maven/pom.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.openfaas</groupId>
+    <artifactId>java11</artifactId>
+    <packaging>pom</packaging>
+    <version>0.1.0</version>
+    <modules>
+        <module>function</module>
+    </modules>
+</project>
\ No newline at end of file
diff --git a/template/java11-maven/template.yml b/template/java11-maven/template.yml
new file mode 100644
index 00000000..95934d29
--- /dev/null
+++ b/template/java11-maven/template.yml
@@ -0,0 +1,4 @@
+language: java11
+welcome_message: |
+  You have created a function using the java11 template which uses an LTS
+  version of the OpenJDK.