refactoring

dao/src/main/java/org/thingsboard/server/dao/device/DeviceConnectivityServiceImpl.java

@@ -201,7 +201,7 @@ public class DeviceConnectivityServiceImpl implements DeviceConnectivityService
                     pemContentBuilder.append("-----END CERTIFICATE-----\n");
                 }
             }
-        } catch (IOException e) {
+        } catch (Exception e) {
             String msg = String.format("Failed to read %s server certificate!", path);
             log.warn(msg);
             throw new RuntimeException(msg, e);

dao/src/main/java/org/thingsboard/server/dao/util/DeviceConnectivityUtil.java

@@ -214,24 +214,24 @@ public class DeviceConnectivityUtil {
             return null;
         }
 
-        StringBuilder mqttDockerCommand = new StringBuilder();
+        StringBuilder coapDockerCommand = new StringBuilder();
-        mqttDockerCommand.append(DOCKER_RUN).append(isLocalhost(host) ? ADD_DOCKER_INTERNAL_HOST : "").append(COAP_IMAGE);
+        coapDockerCommand.append(DOCKER_RUN).append(isLocalhost(host) ? ADD_DOCKER_INTERNAL_HOST : "").append(COAP_IMAGE);
 
         if (isLocalhost(host)) {
             coapCommand = coapCommand.replace(host, HOST_DOCKER_INTERNAL);
         }
 
         if (COAPS.equals(protocol)) {
-            mqttDockerCommand.append("/bin/sh -c \"")
+            coapDockerCommand.append("/bin/sh -c \"")
                     .append(getCurlPemCertCommand(baseUrl, protocol))
                     .append(" && ")
                     .append(coapCommand)
                     .append("\"");
         } else {
-            mqttDockerCommand.append(coapCommand);
+            coapDockerCommand.append(coapCommand);
         }
 
-        return mqttDockerCommand.toString();
+        return coapDockerCommand.toString();
     }
 
     public static String getHost(String baseUrl, DeviceConnectivityInfo properties, String protocol) throws URISyntaxException {