Add limitation in the array of events for the endpoint of generate (#227)

* Add limitation in the array of events for the endpoint of generate

* Add limitation in the array of events for the endpoint of generate

* Add limitation in the array of events for the endpoint of generate

Author: shudhansu-shekhar

service/src/main/java/com/ericsson/eiffel/remrem/generate/controller/RemremGenerateController.java

@@ -32,6 +32,7 @@
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.PropertySource;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
 import org.springframework.http.RequestEntity;
@@ -52,7 +53,6 @@
 import java.util.Map.Entry;
 
 import static com.ericsson.eiffel.remrem.generate.constants.RemremGenerateServiceConstants.*;
-
 @RestController
 @RequestMapping("/*")
 @Api(value = "REMReM Generate Service", description = "REST API for generating Eiffel messages")
@@ -76,6 +76,9 @@ public class RemremGenerateController {
     @Value("${lenientValidationEnabledToUsers:false}")
     private boolean lenientValidationEnabledToUsers;
 
+    @Value("${maxSizeOfInputArray:250}")
+    private int maxSizeOfInputArray = 250;
+
     public void setLenientValidationEnabledToUsers(boolean lenientValidationEnabledToUsers) {
         this.lenientValidationEnabledToUsers = lenientValidationEnabledToUsers;
     }
@@ -159,6 +162,12 @@ public ResponseEntity<?> generate(final String msgProtocol, final String msgType
 
             if (inputData.isJsonArray()) {
                 JsonArray inputEventJsonArray = inputData.getAsJsonArray();
+
+                if (inputEventJsonArray.size() > maxSizeOfInputArray) {
+                    return createResponseEntity(HttpStatus.BAD_REQUEST, JSON_ERROR_STATUS,
+                            "The number of events in the input array is too high: " + inputEventJsonArray.size() + " > "
+                                    + maxSizeOfInputArray + "; you can modify the property 'maxSizeOfInputArray' to increase it.");
+                }
                 for (JsonElement element : inputEventJsonArray) {
                     JsonObject generatedEvent = (processEvent(msgProtocol, msgType,
                             failIfMultipleFound, failIfNoneFound, lookupInExternalERs, lookupLimit,

service/src/main/resources/application.properties

@@ -28,4 +28,7 @@ event-repository.enabled: false
 event-repository.url: http://<host>:<port>/<context-path-if-available>
 
 # lenientValidationEnabledToUsers true will perform the validation only on mandatory fields, non-mandatory validation failures add into Eiffel message as property remremGenerateFailures
-lenientValidationEnabledToUsers: false
+lenientValidationEnabledToUsers: false
+
+#Maximum number of templates in array passed to generate endpoint
+maxSizeOfInputArray: 250