From e13438eefddbf0e5eee6edfb6b8bb76b1d4c78a6 Mon Sep 17 00:00:00 2001
From: kske <kai@kske.dev>
Date: Sat, 28 Dec 2019 15:48:39 +0200
Subject: [PATCH] Added basic lifecycle with object reading capabilities

* Added java-nio-server dependency
* Added ObjectMessageReader and ObjectMessageProcessor
* Added Startup class starting a Server instance
---
 .settings/org.eclipse.jdt.ui.prefs            |  2 +
 pom.xml                                       |  8 +++
 .../envoy/server/ObjectMessageProcessor.java  | 32 ++++++++++
 .../envoy/server/ObjectMessageReader.java     | 58 +++++++++++++++++++
 src/main/java/envoy/server/Startup.java       | 21 +++++++
 5 files changed, 121 insertions(+)
 create mode 100644 .settings/org.eclipse.jdt.ui.prefs
 create mode 100644 src/main/java/envoy/server/ObjectMessageProcessor.java
 create mode 100644 src/main/java/envoy/server/ObjectMessageReader.java
 create mode 100644 src/main/java/envoy/server/Startup.java

diff --git a/.settings/org.eclipse.jdt.ui.prefs b/.settings/org.eclipse.jdt.ui.prefs
new file mode 100644
index 0000000..7103be7
--- /dev/null
+++ b/.settings/org.eclipse.jdt.ui.prefs
@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.ui.text.custom_code_templates=
diff --git a/pom.xml b/pom.xml
index 3d1e16d..144ebd0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -17,6 +17,14 @@
 		<maven.compiler.target>1.8</maven.compiler.target>
 	</properties>
 
+	<dependencies>
+		<dependency>
+			<groupId>informatik-ag-ngl</groupId>
+			<artifactId>java-nio-server</artifactId>
+			<version>0.0.1-SNAPSHOT</version>
+		</dependency>
+	</dependencies>
+
 	<build>
 		<finalName>envoy-server-standalone</finalName>
 	</build>
diff --git a/src/main/java/envoy/server/ObjectMessageProcessor.java b/src/main/java/envoy/server/ObjectMessageProcessor.java
new file mode 100644
index 0000000..bd2a735
--- /dev/null
+++ b/src/main/java/envoy/server/ObjectMessageProcessor.java
@@ -0,0 +1,32 @@
+package envoy.server;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+
+import com.jenkov.nioserver.IMessageProcessor;
+import com.jenkov.nioserver.Message;
+import com.jenkov.nioserver.WriteProxy;
+
+/**
+ * Project: <strong>envoy-server-standalone</strong><br>
+ * File: <strong>ObjectMessageProcessor.java</strong><br>
+ * Created: <strong>28.12.2019</strong><br>
+ * 
+ * @author Kai S. K. Engelbart
+ * @since Envoy Server v0.1-alpha
+ */
+public class ObjectMessageProcessor implements IMessageProcessor {
+
+	@Override
+	public void process(Message message, WriteProxy writeProxy) {
+		try (ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(message.sharedArray, message.offset + 1, message.length - 1))) {
+			Object obj = in.readObject();
+
+			// TODO: Process pipeline
+			System.out.println("Read object: " + obj.toString());
+		} catch (IOException | ClassNotFoundException e) {
+			e.printStackTrace();
+		}
+	}
+}
\ No newline at end of file
diff --git a/src/main/java/envoy/server/ObjectMessageReader.java b/src/main/java/envoy/server/ObjectMessageReader.java
new file mode 100644
index 0000000..2249954
--- /dev/null
+++ b/src/main/java/envoy/server/ObjectMessageReader.java
@@ -0,0 +1,58 @@
+package envoy.server;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.List;
+
+import com.jenkov.nioserver.IMessageReader;
+import com.jenkov.nioserver.Message;
+import com.jenkov.nioserver.MessageBuffer;
+import com.jenkov.nioserver.Socket;
+
+/**
+ * Project: <strong>envoy-server-standalone</strong><br>
+ * File: <strong>ObjectMessageReader.java</strong><br>
+ * Created: <strong>28.12.2019</strong><br>
+ * 
+ * @author Kai S. K. Engelbart
+ * @since Envoy Server Standalone v0.1-alpha
+ */
+public class ObjectMessageReader implements IMessageReader {
+
+	private List<Message>	completeMessages	= new ArrayList<>();
+	private Message			nextMessage;
+	private MessageBuffer	messageBuffer;
+
+	@Override
+	public void init(MessageBuffer messageBuffer) {
+		this.messageBuffer	= messageBuffer;
+		nextMessage			= messageBuffer.getMessage();
+	}
+
+	@Override
+	public void read(Socket socket, ByteBuffer buffer) throws IOException {
+		socket.read(buffer);
+		buffer.flip();
+
+		if (!buffer.hasRemaining()) {
+			buffer.clear();
+			return;
+		}
+
+		nextMessage.writeToMessage(buffer);
+		
+		int length = nextMessage.sharedArray[nextMessage.offset];
+		if(nextMessage.length - nextMessage.offset >= length) {
+			Message message = messageBuffer.getMessage();
+			message.writePartialMessageToMessage(nextMessage, nextMessage.offset + length);
+			completeMessages.add(nextMessage);
+			nextMessage = message;
+		}
+		
+		buffer.clear();
+	}
+
+	@Override
+	public List<Message> getMessages() { return completeMessages; }
+}
\ No newline at end of file
diff --git a/src/main/java/envoy/server/Startup.java b/src/main/java/envoy/server/Startup.java
new file mode 100644
index 0000000..1c0932b
--- /dev/null
+++ b/src/main/java/envoy/server/Startup.java
@@ -0,0 +1,21 @@
+package envoy.server;
+
+import java.io.IOException;
+
+import com.jenkov.nioserver.Server;
+
+/**
+ * Project: <strong>envoy-server-standalone</strong><br>
+ * File: <strong>Startup.java</strong><br>
+ * Created: <strong>24.12.2019</strong><br>
+ * 
+ * @author Kai S. K. Engelbart
+ * @since Envoy Server Standalone v0.1-alpha
+ */
+public class Startup {
+
+	public static void main(String[] args) throws IOException {
+		Server server = new Server(8080, () -> new ObjectMessageReader(), new ObjectMessageProcessor());
+		server.start();
+	}
+}
\ No newline at end of file