fix: Endpoint is not well updated when changing host or port of an ex…

…isting service

This closes gravitee-io/issues#2069

src/main/java/io/gravitee/discovery/api/service/AbstractServiceDiscovery.java

@@ -0,0 +1,69 @@
+/**
+ * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.gravitee.discovery.api.service;
+
+import io.gravitee.discovery.api.ServiceDiscovery;
+import io.gravitee.discovery.api.event.Event;
+import io.gravitee.discovery.api.event.EventType;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+
+public abstract class AbstractServiceDiscovery<T extends Service> implements ServiceDiscovery {
+
+  private List<T> services = new ArrayList<>();
+
+  public Event registerEndpoint(T service) {
+    services.add(service);
+    return new Event() {
+      @Override
+      public EventType type() {
+        return EventType.REGISTER;
+      }
+
+      @Override
+      public Service service() {
+        return service;
+      }
+    };
+  }
+
+  public Event unregisterEndpoint(T service) {
+    services.remove(service);
+    return new Event() {
+      @Override
+      public EventType type() {
+        return EventType.UNREGISTER;
+      }
+
+      @Override
+      public Service service() {
+        return service;
+      }
+    };
+  }
+
+  public T getService(Predicate<T> predicate) {
+    return services.stream().filter(predicate).findAny().orElse(null);
+  }
+
+  public List<T> getServices(Predicate<T> predicate) {
+    return services.stream().filter(predicate).collect(Collectors.toList());
+  }
+
+}