From d6d55af49e57a9950d3f646dea8e3307ac6c6987 Mon Sep 17 00:00:00 2001
From: Vitaly Takmazov
Date: Mon, 1 Aug 2016 17:35:14 +0300
Subject: www: reconnect XMPP component using failsafe library

---
 juick-www/build.gradle                          |  1 +
 juick-www/src/main/java/com/juick/www/Main.java | 40 +++++++++++++++----------
 2 files changed, 25 insertions(+), 16 deletions(-)

diff --git a/juick-www/build.gradle b/juick-www/build.gradle
index f609cc90..6089ca15 100644
--- a/juick-www/build.gradle
+++ b/juick-www/build.gradle
@@ -36,6 +36,7 @@ dependencies {
     compile 'org.json:json:20151123'
     compile 'net.coobird:thumbnailator:0.4.8'
     compile 'com.github.ooxi:serialized-php-parser:0.5.0'
+    compile 'net.jodah:failsafe:0.9.2'
     providedCompile 'javax.servlet:javax.servlet-api:3.1.0'
     providedRuntime 'mysql:mysql-connector-java:5.1.39'
 }
diff --git a/juick-www/src/main/java/com/juick/www/Main.java b/juick-www/src/main/java/com/juick/www/Main.java
index d8096ff4..63194fbd 100644
--- a/juick-www/src/main/java/com/juick/www/Main.java
+++ b/juick-www/src/main/java/com/juick/www/Main.java
@@ -21,8 +21,11 @@ import com.juick.server.UserQueries;
 import com.juick.xmpp.JID;
 import com.juick.xmpp.Stream;
 import com.juick.xmpp.StreamComponent;
+import net.jodah.failsafe.Execution;
+import net.jodah.failsafe.RetryPolicy;
 import org.apache.commons.dbcp2.BasicDataSource;
 import org.springframework.jdbc.core.JdbcTemplate;
+import org.xmlpull.v1.XmlPullParserException;
 import ru.sape.Sape;
 
 import javax.servlet.ServletException;
@@ -32,13 +35,13 @@ import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
-import java.net.ConnectException;
 import java.net.Socket;
 import java.net.URLEncoder;
 import java.util.Objects;
 import java.util.Properties;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
 
 /**
  *
@@ -66,7 +69,8 @@ public class Main extends HttpServlet implements Stream.StreamListener {
     SignUp signup = new SignUp();
     Settings settings = new Settings();
     RSS rss = new RSS();
-    ExecutorService executorService = Executors.newSingleThreadExecutor();
+    ExecutorService executorService = Executors.newSingleThreadScheduledExecutor();
+    Execution execution;
 
     @Override
     public void init() throws ServletException {
@@ -101,27 +105,31 @@ public class Main extends HttpServlet implements Stream.StreamListener {
         }
     }
 
-    @Override
-    public void destroy() {
-        executorService.shutdownNow();
-        super.destroy();
-    }
-
     public void setupXmppComponent(final JID componentJid, final String password) {
+        @SuppressWarnings("unchecked") RetryPolicy retryPolicy = new RetryPolicy()
+                .withBackoff(1, 30, TimeUnit.SECONDS)
+                .withJitter(0.1)
+                .retryOn(IOException.class, XmlPullParserException.class);
+        execution = new Execution(retryPolicy);
         executorService.submit(() -> {
-            try {
-                Socket socket = new Socket("localhost", 5347);
-                xmpp = new StreamComponent(componentJid, socket.getInputStream(), socket.getOutputStream(), password);
-                xmpp.addListener(Main.this);
-                xmpp.startParsing();
-            } catch (IOException e) {
-                log("XMPP is not initialized");
+            while (!execution.isComplete()) {
+                try {
+                    Socket socket = new Socket("localhost", 5347);
+                    xmpp = new StreamComponent(componentJid, socket.getInputStream(), socket.getOutputStream(), password);
+                    xmpp.addListener(Main.this);
+                    xmpp.startParsing();
+                } catch (IOException e) {
+                    log("XMPP router disconnected, reconnecting...");
+                }
             }
         });
     }
 
     @Override
-    public void onStreamFail(Exception e) {log("XMPP STREAM FAIL:" + e);}
+    public void onStreamFail(Exception e) {
+        log("XMPP STREAM FAIL:" + e);
+        execution.recordFailure(e);
+    }
 
     @Override
     public void onStreamReady() {
-- 
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