[WIP]Help refactor code solid patterns

tools/src/main/java/org/thingsboard/client/tools/MqttSslClient.java

@@ -50,38 +50,86 @@ public class MqttSslClient {
             File ksFile = new File(ksUrl.toURI());
             URL tsUrl = Resources.getResource(KEY_STORE_FILE);
             File tsFile = new File(tsUrl.toURI());
+            char[] ksPwd = setKeyPassword();
+
+            KeyStore trustStore = setKeyStore(tsFile, ksPwd);
+
+            TrustManagerFactory tmf = setTrustManagerFactory(trustStore);
+
+            KeyStore ks = setKeyStore2(ksFile, ksPwd);
+
+            KeyManagerFactory kmf = setKeyManagerFactory(ks);
+
+            SSLContext sslContext = setSSLContext(kmf, tmf);
+
+            MqttConnectOptions mqttConnectOptions = setMqttConnectOptions(sslContext);
+
+            MqttAsyncClient mqttAsyncClient = setMqttAsyncClient(mqttConnectOptions);
+
+            setMessage(mqttAsyncClient, "v1/devices/me/telemetry", "{\"key1\":\"value1\", \"key2\":true, \"key3\": 3.0, \"key4\": 4}");
 
-            TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
-
-            KeyStore trustStore = KeyStore.getInstance(JKS);
-            char[] ksPwd = new char[]{0x63, 0x6C, 0x69, 0x65, 0x6E, 0x74, 0x5F, 0x6B, 0x73, 0x5F, 0x70, 0x61, 0x73, 0x73, 0x77, 0x6F, 0x72, 0x64};
-            trustStore.load(new FileInputStream(tsFile), ksPwd);
-            tmf.init(trustStore);
-            KeyStore ks = KeyStore.getInstance(JKS);
-
-            ks.load(new FileInputStream(ksFile), ksPwd);
-            KeyManagerFactory kmf = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
-            char[] clientPwd = new char[]{0x63, 0x6C, 0x69, 0x65, 0x6E, 0x74, 0x5F, 0x6B, 0x65, 0x79, 0x5F, 0x70, 0x61, 0x73, 0x73, 0x77, 0x6F, 0x72, 0x64};
-            kmf.init(ks, clientPwd);
-
-            KeyManager[] km = kmf.getKeyManagers();
-            TrustManager[] tm = tmf.getTrustManagers();
-            SSLContext sslContext = SSLContext.getInstance(TLS);
-            sslContext.init(km, tm, null);
-
-            MqttConnectOptions options = new MqttConnectOptions();
-            options.setSocketFactory(sslContext.getSocketFactory());
-            MqttAsyncClient client = new MqttAsyncClient(MQTT_URL, CLIENT_ID);
-            client.connect(options);
-            Thread.sleep(3000);
-            MqttMessage message = new MqttMessage();
-            message.setPayload("{\"key1\":\"value1\", \"key2\":true, \"key3\": 3.0, \"key4\": 4}".getBytes());
-            client.publish("v1/devices/me/telemetry", message);
-            client.disconnect();
-            log.info("Disconnected");
-            System.exit(0);
         } catch (Exception e) {
             log.error("Unexpected exception occurred in MqttSslClient", e);
         }
     }
+
+    private static char[] setKeyPassword(){
+        return new char[]{0x63, 0x6C, 0x69, 0x65, 0x6E, 0x74, 0x5F, 0x6B, 0x73, 0x5F, 0x70, 0x61, 0x73, 0x73, 0x77, 0x6F, 0x72, 0x64};
+    }
+
+    private static KeyStore setKeyStore(File tsFile, char[] ksPwd) throws Exception{
+        KeyStore trustStore = KeyStore.getInstance(JKS);
+        trustStore.load(new FileInputStream(tsFile), ksPwd);
+        return trustStore;
+    }
+
+    private static TrustManagerFactory setTrustManagerFactory(KeyStore trustStore) throws Exception {
+        TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
+        tmf.init(trustStore);
+        return tmf;
+    }
+
+    private static KeyStore setKeyStore2(File ksFile, char[] ksPwd)throws Exception{
+        KeyStore ks = KeyStore.getInstance(JKS);
+        ks.load(new FileInputStream(ksFile), ksPwd);
+        return ks;
+    }
+
+    private static KeyManagerFactory setKeyManagerFactory(KeyStore ks) throws Exception {
+        KeyManagerFactory kmf = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
+        char[] clientPwd = new char[]{0x63, 0x6C, 0x69, 0x65, 0x6E, 0x74, 0x5F, 0x6B, 0x65, 0x79, 0x5F, 0x70, 0x61, 0x73, 0x73, 0x77, 0x6F, 0x72, 0x64};
+        kmf.init(ks, clientPwd);
+        return kmf;
+    }
+
+    private static SSLContext setSSLContext(KeyManagerFactory kmf, TrustManagerFactory tmf) throws Exception {
+        KeyManager[] km = kmf.getKeyManagers();
+        TrustManager[] tm = tmf.getTrustManagers();
+        SSLContext sslContext = SSLContext.getInstance(TLS);
+        sslContext.init(km, tm, null);
+        return sslContext;
+    }
+
+    private static MqttConnectOptions setMqttConnectOptions(SSLContext sslContext){
+        MqttConnectOptions options = new MqttConnectOptions();
+        options.setSocketFactory(sslContext.getSocketFactory());
+        return options;
+    }
+
+    private static MqttAsyncClient setMqttAsyncClient(MqttConnectOptions options) throws Exception{
+        MqttAsyncClient client = new MqttAsyncClient(MQTT_URL, CLIENT_ID);
+        client.connect(options);
+        Thread.sleep(3000);
+        return client;
+    }
+
+    private static void setMessage(MqttAsyncClient client, String topic, String payload) throws Exception {
+        MqttMessage message = new MqttMessage();
+        message.setPayload(payload.getBytes());
+        client.publish(topic, message);
+        client.disconnect();
+        log.info("Disconnected");
+        System.exit(0);
+    }
+
 }