jvm-jersey-env (#1677)

A new Jersey framework based JVM environment which is lightweight and simpler.

examples/jvm-jersey/java/src/main/java/io/fission/HelloWorld.java

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+package io.fission;
+
+import javax.ws.rs.core.Response;
+import javax.ws.rs.container.ContainerRequestContext;
+import io.fission.Function;
+import java.io.BufferedReader;
+import java.util.stream.Collectors;
+import java.io.InputStreamReader;
+
+public class HelloWorld implements Function<ContainerRequestContext,Response> {
+
+	public static final String RETURN_STRING = "Hello World!";
+
+	@Override
+	public Response call(ContainerRequestContext request, Context arg1) {		
+		if(request.getMethod().equals("GET")) {
+			return Response.ok(RETURN_STRING).build();
+		}
+		else {
+			String body = new BufferedReader(new InputStreamReader(request.getEntityStream())).lines()
+			.parallel().collect(Collectors.joining("\n"));
+			return Response.ok("Echo: " + body).build();
+		}
+	}
+}

examples/jvm-jersey/java/src/test/java/io/fission/HelloWorldTest.java

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+package io.fission;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+import org.glassfish.jersey.server.ContainerRequest;
+import javax.ws.rs.core.Response;
+import org.junit.Assert;
+import org.junit.Test;
+
+
+public class HelloWorldTest {
+
+	@Test
+	public void testResponse() {
+		HelloWorld hw = new HelloWorld();
+		ContainerRequest request = null;
+		try {
+			request = new ContainerRequest(new URI("http://example.com/"),new URI("/hello"),"GET",null,null);
+		} catch (URISyntaxException e) {
+			e.printStackTrace();
+		}
+		Response response = hw.call(request, null);
+		Assert.assertTrue(response.getEntity().toString().equals(HelloWorld.RETURN_STRING));
+	}
+}