Proof of concept: read pricing stream from Oanda

src/main/java/App.java

@@ -1,12 +1,75 @@
-/*
- * This Java source file was generated by the Gradle 'init' task.
- */
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.MalformedURLException;
+import java.net.SocketTimeoutException;
+import java.net.URL;
+import java.net.URLConnection;
+import java.net.URLEncoder;
+
+import javax.net.ssl.HttpsURLConnection;
+//import com.espertech.esper.client.*;
+
 public class App {
-    public String getGreeting() {
-        return "Hello world.";
-    }
 
     public static void main(String[] args) {
-        System.out.println(new App().getGreeting());
+
+		//EPServiceProvider engine = EPServiceProviderManager.getDefaultProvider();
+
+		try {
+			String[] instruments = new String[] {"USD_CAD", "EUR_USD", "USD_JPY"};
+
+			String query = String.format("instruments=%s", 
+										 URLEncoder.encode(String.join(",", instruments), "UTF-8"));
+			
+			openConnection("https://stream-fxpractice.oanda.com/v3/accounts/101-001-7935538-001/pricing/stream?" + query);
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
     }
+
+	private static void openConnection(String urlStr)
+		throws IOException
+	{
+		HttpsURLConnection httpConn = null;
+		String line = null;
+		try {
+			URL url = new URL(urlStr);
+			URLConnection urlConn = url.openConnection();
+			if (!(urlConn instanceof HttpsURLConnection)) {
+				throw new IOException ("URL is not an Https URL");
+			}
+			httpConn = (HttpsURLConnection)urlConn;
+			httpConn.setAllowUserInteraction(false);
+			httpConn.setInstanceFollowRedirects(true);
+			httpConn.setRequestMethod("GET");
+			httpConn.setReadTimeout(50 * 1000);
+			httpConn.setRequestProperty("Authorization", "Bearer 9a480f0b83e987f4015cf0846790c7d9-695ced635526744abd61bdf0e2ae8b71");
+			BufferedReader is =
+                new BufferedReader(new InputStreamReader(httpConn.getInputStream()));
+
+			while ((line = is.readLine( )) != null) {
+				System.out.println(line);
+                // Message msg = Message.obtain();
+                // msg.what=1;
+                // msg.obj=line;
+                // mhandler.sendMessage(msg);
+
+			}
+		} catch (MalformedURLException e) {
+			e.printStackTrace();
+		} catch(SocketTimeoutException e){
+			e.printStackTrace();
+		} catch (IOException e) {
+			e.printStackTrace();
+			//Message msg = Message.obtain();
+            //msg.what=2;
+            //BufferedInputStream in = new BufferedInputStream(httpConn.getErrorStream());
+            //line = new String(readStream(in));
+            //msg.obj = line;
+            //mhandler.sendMessage(msg);
+		} finally {
+			httpConn.disconnect();
+		}
+	}
 }

src/test/java/AppTest.java

@@ -7,6 +7,6 @@ import static org.junit.Assert.*;
 public class AppTest {
     @Test public void testAppHasAGreeting() {
         App classUnderTest = new App();
-        assertNotNull("app should have a greeting", classUnderTest.getGreeting());
+        //assertNotNull("app should have a greeting", classUnderTest.getGreeting());
     }
 }