[BUG] Dminame to valid topic suffix

- dmi name can be in the form of URL , and we are using dmi-name as
  topic suffix , which results in the invalid topic name.
- fix to extract out domain name excluding port from the url
- test case for the same
- updated the documentation
- fix only supports ipv4 addresses at the moment

Issue-ID: CPS-1979
Change-Id: I9c6ea113afae816f727b45a30c94070af013a16d
Signed-off-by: mpriyank <priyank.maheshwari@est.tech>

2 files changed, 33 insertions, 2 deletions

diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/events/cmsubscription/CmSubscriptionNcmpInEventForwarder.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/events/cmsubscription/CmSubscriptionNcmpInEventForwarder.java
index 5f26db335b..e8086b1171 100644
--- a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/events/cmsubscription/CmSubscriptionNcmpInEventForwarder.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/events/cmsubscription/CmSubscriptionNcmpInEventForwarder.java
@@ -31,6 +31,8 @@ import java.util.Set;
 import java.util.concurrent.Executors;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -56,6 +58,9 @@ import org.springframework.stereotype.Component;
 @RequiredArgsConstructor
 public class CmSubscriptionNcmpInEventForwarder {
 
+    private static final Pattern REGEX_TO_EXTRACT_DOMAIN_FROM_URL_EXCLUDING_PORT =
+            Pattern.compile("http[s]?:\\/\\/(?:www\\.)?([^\\/:]+):{0,1}[0-9]{0,5}");
+
     private final InventoryPersistence inventoryPersistence;
     private final EventsPublisher<CloudEvent> eventsPublisher;
     private final IMap<String, Set<String>> forwardedSubscriptionEventCache;
@@ -153,8 +158,9 @@ public class CmSubscriptionNcmpInEventForwarder {
                     }).collect(Collectors.toList());
 
             cmSubscriptionDmiInEvent.getData().getPredicates().setTargets(cmHandleTargets);
-            final String eventKey = createEventKey(cmSubscriptionDmiInEvent, dmiName);
-            final String dmiAvcSubscriptionTopic = dmiAvcSubscriptionTopicPrefix + dmiName;
+            final String dmiNameSuffix = toValidTopicSuffix(dmiName);
+            final String eventKey = createEventKey(cmSubscriptionDmiInEvent, dmiNameSuffix);
+            final String dmiAvcSubscriptionTopic = dmiAvcSubscriptionTopicPrefix + dmiNameSuffix;
 
             final CloudEvent cmSubscriptionDmiInCloudEvent =
                     cmSubscriptionEventCloudMapper.toCloudEvent(cmSubscriptionDmiInEvent, eventKey, eventType);
@@ -186,4 +192,13 @@ public class CmSubscriptionNcmpInEventForwarder {
                                     SubscriptionStatus.REJECTED, "Targets not found"))
                 .collect(Collectors.toList());
     }
+
+    /*
+    CPS-1979 : DmiName can be a URL , which is not a valid topic name.
+               Hence just taking the domain name(excluding port) information to be part of the topic name.
+     */
+    private String toValidTopicSuffix(final String dmiName) {
+        final Matcher matcher = REGEX_TO_EXTRACT_DOMAIN_FROM_URL_EXCLUDING_PORT.matcher(dmiName);
+        return matcher.find() ? matcher.group(1) : dmiName;
+    }
 }
diff --git a/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/events/cmsubscription/CmSubscriptionNcmpInEventForwarderSpec.groovy b/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/events/cmsubscription/CmSubscriptionNcmpInEventForwarderSpec.groovy
index 1edfa58f9a..ce117eef57 100644
--- a/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/events/cmsubscription/CmSubscriptionNcmpInEventForwarderSpec.groovy
+++ b/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/events/cmsubscription/CmSubscriptionNcmpInEventForwarderSpec.groovy
@@ -179,6 +179,22 @@ class CmSubscriptionNcmpInEventForwarderSpec extends MessagingBaseSpec {
             1 * mockCmSubscriptionNcmpOutEventPublisher.sendResponse(_, 'subscriptionCreatedStatus')
     }
 
+    def 'Extract domain name from URL for #scenario'() {
+        when: 'a valid dmi name is provided'
+            def domainName = objectUnderTest.toValidTopicSuffix(dmiName)
+        then: 'domain name is as expected with no port information'
+            assert domainName == expectedDomainName
+        where: ''
+            scenario                               | dmiName                            || expectedDomainName
+            'insecure http url with port'          | 'http://www.onap-dmi:8080/xyz=123' || 'onap-dmi'
+            'insecure http url without port'       | 'http://www.onap-dmi/xyz=123'      || 'onap-dmi'
+            'secure https url with port'           | 'https://127.0.0.1:8080/xyz=123'   || '127.0.0.1'
+            'secure https url without port'        | 'https://127.0.0.1/xyz=123'        || '127.0.0.1'
+            'servername without protocol and port' | 'dminame1'                         || 'dminame1'
+            'servername without protocol'          | 'www.onap-dmi:8080/xyz=123'        || 'www.onap-dmi:8080/xyz=123'
+
+    }
+
     static def createYangModelCmHandleWithDmiProperty(id, dmiId, propertyName, propertyValue) {
         return new YangModelCmHandle(id: "CMHandle" + id, dmiDataServiceName: "DMIName" + dmiId, dmiProperties: [new YangModelCmHandle.Property(propertyName, propertyValue)])
     }