Merge pull request #245 from skarnecki/java-support

add java support. Closes #4

.gitignore

@@ -1,4 +1,3 @@
-main
 *.zip
 .DS_Store
 examples/go/main

_examples/java/event.json

@@ -0,0 +1,3 @@
+{
+  "hello": "world"
+}

_examples/java/functions/bar/function.json

@@ -0,0 +1,7 @@
+{
+  "description": "Java example function",
+  "timeout": 1,
+  "memory": 256,
+  "runtime": "java",
+  "handler": "lambda.Example::handler"
+}

_examples/java/functions/bar/pom.xml

@@ -0,0 +1,50 @@
+<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 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <!-- Generic values -->
+    <groupId>plugin-result</groupId>
+    <artifactId>run.apex</artifactId>
+    <packaging>jar</packaging>
+    <version>apex</version>
+    <name>apex-plugin-result</name>
+
+    <properties>
+        <!-- This prop is set when apex mvn package -->
+        <jar.finalName>apex-plugin-result</jar.finalName>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.amazonaws</groupId>
+            <artifactId>aws-lambda-java-core</artifactId>
+            <version>1.1.0</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>2.3</version>
+                <configuration>
+                    <createDependencyReducedPom>false</createDependencyReducedPom>
+                </configuration>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>2.3.2</version>
+            </plugin>
+        </plugins>
+    </build>
+</project>

_examples/java/functions/bar/src/main/java/lambda/Example.java

@@ -0,0 +1,49 @@
+package lambda;
+
+import com.amazonaws.services.lambda.runtime.Context; 
+
+public class Example {
+
+    public static class ExampleRequest {
+        String hello;
+
+        public String getHello() {
+            return hello;
+        }
+
+        public void setHello(String hello) {
+            this.hello = hello;
+        }
+
+        public ExampleRequest(String hello) {
+            this.hello = hello;
+        }
+
+        public ExampleRequest() {
+        }
+    }
+
+
+    public static class ExampleResponse {
+        String hello;
+
+        public String getHello() {
+            return hello;
+        }
+
+        public void setHello(String hello) {
+            this.hello = hello;
+        }
+
+        public ExampleResponse(String hello) {
+            this.hello = hello;
+        }
+
+        public ExampleResponse() {
+        }
+    }
+
+    public ExampleResponse handler(ExampleRequest event, Context context) {
+        return new ExampleResponse("bar");
+    }
+}

_examples/java/functions/baz/src/main/java/lambda/Main.java

@@ -0,0 +1,49 @@
+package lambda;
+
+import com.amazonaws.services.lambda.runtime.Context; 
+
+public class Main {
+
+    public static class ExampleRequest {
+        String hello;
+
+        public String getHello() {
+            return hello;
+        }
+
+        public void setHello(String hello) {
+            this.hello = hello;
+        }
+
+        public ExampleRequest(String hello) {
+            this.hello = hello;
+        }
+
+        public ExampleRequest() {
+        }
+    }
+
+
+    public static class ExampleResponse {
+        String hello;
+
+        public String getHello() {
+            return hello;
+        }
+
+        public void setHello(String hello) {
+            this.hello = hello;
+        }
+
+        public ExampleResponse(String hello) {
+            this.hello = hello;
+        }
+
+        public ExampleResponse() {
+        }
+    }
+
+    public ExampleResponse handler(ExampleRequest event, Context context) {
+        return new ExampleResponse("baz");
+    }
+}

_examples/java/functions/foo/function.json

@@ -0,0 +1,7 @@
+{
+  "description": "Java example function",
+  "timeout": 1,
+  "memory": 512,
+  "runtime": "java",
+  "handler": "lambda.Hello::handler"
+}

_examples/java/functions/foo/src/main/java/lambda/Hello.java

@@ -0,0 +1,49 @@
+package lambda;
+
+import com.amazonaws.services.lambda.runtime.Context; 
+
+public class Hello {
+
+    public static class ExampleRequest {
+        String hello;
+
+        public String getHello() {
+            return hello;
+        }
+
+        public void setHello(String hello) {
+            this.hello = hello;
+        }
+
+        public ExampleRequest(String hello) {
+            this.hello = hello;
+        }
+
+        public ExampleRequest() {
+        }
+    }
+
+
+    public static class ExampleResponse {
+        String hello;
+
+        public String getHello() {
+            return hello;
+        }
+
+        public void setHello(String hello) {
+            this.hello = hello;
+        }
+
+        public ExampleResponse(String hello) {
+            this.hello = hello;
+        }
+
+        public ExampleResponse() {
+        }
+    }
+
+    public ExampleResponse handler(ExampleRequest event, Context context) {
+        return new ExampleResponse("foo");
+    }
+}

_examples/java/project.json

@@ -0,0 +1,7 @@
+{
+  "name": "java",
+  "description": "Java example project",
+  "memory": 128,
+  "timeout": 5,
+  "role": "arn:aws:iam::293503197324:role/lambda"
+}

docs/java.md

@@ -0,0 +1,64 @@
+# Requirements 
+Apex expects pom.xml file to be in function directory. If not found, it generic pom.xml will be used.
+
+Requirements for pom.xml to work with apex:
+- mvn package produces valid jar
+- jar.finalName prop have to set name jar name
+- has AWS Lambda dependencies (com.amazonaws.aws-lambda-java-core) 
+
+# Generic pom.xml
+When no pom.xml file in function main directory, Apex will generate one with default properties.
+
+Generated pom.xml
+```xml
+ <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 http://maven.apache.org/maven-v4_0_0.xsd">
+     <modelVersion>4.0.0</modelVersion>
+
+     <!-- Generic values -->
+     <groupId>plugin-result</groupId>
+     <artifactId>run.apex</artifactId>
+     <packaging>jar</packaging>
+     <version>apex</version>
+     <name>apex-plugin-result</name>
+
+     <properties>
+         <!-- This prop is set when apex mvn package -->
+         <jar.finalName>apex-plugin-result</jar.finalName>
+     </properties>
+
+     <dependencies>
+         <dependency>
+             <groupId>com.amazonaws</groupId>
+             <artifactId>aws-lambda-java-core</artifactId>
+             <version>1.1.0</version>
+         </dependency>
+     </dependencies>
+
+     <build>
+         <plugins>
+             <plugin>
+                 <groupId>org.apache.maven.plugins</groupId>
+                 <artifactId>maven-shade-plugin</artifactId>
+                 <version>2.3</version>
+                 <configuration>
+                     <createDependencyReducedPom>false</createDependencyReducedPom>
+                 </configuration>
+                 <executions>
+                     <execution>
+                         <phase>package</phase>
+                         <goals>
+                             <goal>shade</goal>
+                         </goals>
+                     </execution>
+                 </executions>
+             </plugin>
+             <plugin>
+                 <groupId>org.apache.maven.plugins</groupId>
+                 <artifactId>maven-jar-plugin</artifactId>
+                 <version>2.3.2</version>
+             </plugin>
+         </plugins>
+     </build>
+ </project>
+```

function/function.go

@@ -36,6 +36,7 @@ var defaultPlugins = []string{
 	"golang",
 	"python",
 	"nodejs",
+	"java",
 	"hooks",
 	"env",
 	"shim",

plugins/inference/inference.go

@@ -7,16 +7,19 @@ import (
 
 	"github.com/apex/apex/function"
 	"github.com/apex/apex/plugins/golang"
+	"github.com/apex/apex/plugins/java"
 	"github.com/apex/apex/plugins/nodejs"
 	"github.com/apex/apex/plugins/python"
 )
 
 func init() {
 	function.RegisterPlugin("inference", &Plugin{
 		Files: map[string]string{
-			"main.py":  python.Runtime,
-			"index.js": nodejs.Runtime,
-			"main.go":  golang.Runtime,
+			"main.py":                         python.Runtime,
+			"index.js":                        nodejs.Runtime,
+			"main.go":                         golang.Runtime,
+			"pom.xml":                         java.Runtime,
+			"/src/main/java/lambda/Main.java": java.Runtime,
 		},
 	})
 }