Light-weight examples for HelloWorld - for on reading an input/request.

sample-functions/BaseFunctions/java/.gitignore

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+*.class

sample-functions/BaseFunctions/java/Dockerfile

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+FROM openjdk:8u121-jdk-alpine
+
+ADD https://github.com/alexellis/faas/releases/download/0.5.1-alpha/fwatchdog /usr/bin
+RUN chmod +x /usr/bin/fwatchdog
+
+WORKDIR /root/
+
+COPY Handler.java .
+RUN javac Handler.java
+
+ENV fprocess="java Handler"
+
+HEALTHCHECK --interval=1s CMD [ -e /tmp/.lock ] || exit 1
+
+CMD ["fwatchdog"]
+

sample-functions/BaseFunctions/java/Handler.java

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+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+public class Handler {
+
+    public static void main(String[] args) {
+        try {
+
+            String input = readStdin();
+            System.out.print(input);
+
+        } catch(IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private static String readStdin() throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        String input = "";
+        while(true) {
+            String line = br.readLine();
+            if(line==null) {
+                break;
+            }
+            input = input + line + "\n";
+        }
+        return input;
+    }
+}

sample-functions/BaseFunctions/java/build.sh

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+#!/bin/sh
+
+echo "Building functions/openjdk:8u121-jdk-alpine"
+docker build -t functions/openjdk:8u121-jdk-alpine .