fixes #78 return to the caller after sending error to the exchange

Author: stevehu

client/src/main/java/com/networknt/oauth/client/handler/Oauth2ClientPostHandler.java

@@ -47,6 +47,7 @@ public void handleRequest(HttpServerExchange exchange) throws Exception {
                     Status status = new Status(USER_NOT_FOUND, ownerId);
                     exchange.setStatusCode(status.getStatusCode());
                     exchange.getResponseSender().send(status.toString());
+                    return;
                 }
             }
             clients.set(clientId, client);

client/src/main/java/com/networknt/oauth/client/handler/Oauth2ClientPutHandler.java

@@ -43,6 +43,7 @@ public void handleRequest(HttpServerExchange exchange) throws Exception {
                     Status status = new Status(USER_NOT_FOUND, ownerId);
                     exchange.setStatusCode(status.getStatusCode());
                     exchange.getResponseSender().send(status.toString());
+                    return;
                 }
             }
             // set updateDt here.

service/src/main/java/com/networknt/oauth/service/handler/Oauth2ServicePostHandler.java

@@ -37,6 +37,7 @@ public void handleRequest(HttpServerExchange exchange) throws Exception {
                     Status status = new Status(USER_NOT_FOUND, ownerId);
                     exchange.setStatusCode(status.getStatusCode());
                     exchange.getResponseSender().send(status.toString());
+                    return;
                 }
             }
             services.set(serviceId, service);

service/src/main/java/com/networknt/oauth/service/handler/Oauth2ServicePutHandler.java

@@ -42,6 +42,7 @@ public void handleRequest(HttpServerExchange exchange) throws Exception {
                     Status status = new Status(USER_NOT_FOUND, ownerId);
                     exchange.setStatusCode(status.getStatusCode());
                     exchange.getResponseSender().send(status.toString());
+                    return;
                 }
             }
             services.set(serviceId, service);