From 45ada5475192f6afc9645c401de46765be87ee3f Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Thu, 21 May 2015 16:39:25 +0200
Subject: Lean and mean first prototype - to be improved!

---
 .../openslx/dnbd3/status/poller/ServerPoller.java  | 70 ++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 src/main/java/org/openslx/dnbd3/status/poller/ServerPoller.java

(limited to 'src/main/java/org/openslx/dnbd3/status/poller/ServerPoller.java')

diff --git a/src/main/java/org/openslx/dnbd3/status/poller/ServerPoller.java b/src/main/java/org/openslx/dnbd3/status/poller/ServerPoller.java
new file mode 100644
index 0000000..bfa70fb
--- /dev/null
+++ b/src/main/java/org/openslx/dnbd3/status/poller/ServerPoller.java
@@ -0,0 +1,70 @@
+package org.openslx.dnbd3.status.poller;
+
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+import org.openslx.dnbd3.status.rpc.Status;
+
+import com.google.gson.Gson;
+
+/**
+ * Polling a dnbd3 server for its status.
+ * 
+ */
+public class ServerPoller
+{
+
+	private final String address;
+	private final String server;
+	private final Gson parseGson = new Gson();
+
+	public ServerPoller( String host, int port )
+	{
+		this.address = host;
+		this.server = "http://" + host + ":" + port + "/";
+	}
+
+	public Status update()
+	{
+		HttpURLConnection con = null;
+		InputStream is;
+		try {
+			con = (HttpURLConnection)new URL( this.server ).openConnection();
+			con.setRequestMethod( "GET" );
+
+			con.setConnectTimeout( 1000 );
+			con.setReadTimeout( 3000 );
+
+			if ( con.getResponseCode() != HttpURLConnection.HTTP_OK ) {
+				return null;
+			}
+
+			is = con.getInputStream();
+		} catch ( java.net.SocketTimeoutException e ) {
+			return null;
+		} catch ( java.io.IOException e ) {
+			return null;
+		}
+		// Now read data
+		Status status;
+		try {
+			status = parseGson.fromJson( new InputStreamReader( is ), Status.class );
+			status.setAddress( address );
+			status.setTimestamp( System.currentTimeMillis() );
+		} catch ( Exception e ) {
+			e.printStackTrace();
+			status = null;
+		}
+		// TODO: http://docs.oracle.com/javase/6/docs/technotes/guides/net/http-keepalive.html
+		// once dnbd3 server supports keep-alive connections
+		return status;
+	}
+
+	public String getAddress()
+	{
+		return address;
+	}
+
+}
-- 
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