Move EventPublisher to hawkbit-repository-core making hawkbit-reposit… (#2576)

* Move EventPublisher to hawkbit-repository-core making hawkbit-repository-api non dependent to rabbit binders

* Move EventPublisherHolder to org.eclipse.hawkbit.repository.event

* Fix overriding default values of RemoteEvents and rabbit binder

---------

Co-authored-by: vasilchev <vasil.ilchev@bosch.com>

hawkbit-repository/hawkbit-repository-api/pom.xml

@@ -33,11 +33,6 @@
             <version>${project.version}</version>
         </dependency>
 
-        <dependency>
-            <groupId>org.springframework.cloud</groupId>
-            <artifactId>spring-cloud-starter-stream-rabbit</artifactId>
-        </dependency>
-
         <dependency>
             <groupId>jakarta.validation</groupId>
             <artifactId>jakarta.validation-api</artifactId>

hawkbit-repository/hawkbit-repository-core/pom.xml

@@ -50,5 +50,9 @@
             <artifactId>protostuff-runtime</artifactId>
             <optional>true</optional>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-stream-rabbit</artifactId>
+        </dependency>
     </dependencies>
 </project>

hawkbit-repository/hawkbit-repository-core/src/main/java/org/eclipse/hawkbit/event/EventPublisherConfiguration.java

@@ -9,35 +9,58 @@
  */
 package org.eclipse.hawkbit.event;
 
+import java.io.IOException;
 import java.util.concurrent.Executor;
 import java.util.function.Consumer;
 
+import jakarta.annotation.PostConstruct;
+
+import lombok.extern.slf4j.Slf4j;
 import org.eclipse.hawkbit.repository.event.ApplicationEventFilter;
+import org.eclipse.hawkbit.repository.event.EventPublisherHolder;
 import org.eclipse.hawkbit.repository.event.remote.AbstractRemoteEvent;
 import org.eclipse.hawkbit.repository.event.remote.RemoteTenantAwareEvent;
-import org.eclipse.hawkbit.repository.event.EventPublisherHolder;
 import org.eclipse.hawkbit.security.SystemSecurityContext;
 import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.cloud.stream.config.BindingProperties;
 import org.springframework.context.ApplicationEvent;
 import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
-import org.springframework.context.annotation.PropertySource;
 import org.springframework.context.event.ApplicationEventMulticaster;
 import org.springframework.context.event.SimpleApplicationEventMulticaster;
 import org.springframework.context.support.AbstractApplicationContext;
 import org.springframework.core.ResolvableType;
+import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.core.io.support.ResourcePropertySource;
 import org.springframework.messaging.converter.MessageConverter;
 
 /**
  * Autoconfiguration for the events.
  */
+@Slf4j
 @Configuration
-@PropertySource("classpath:/hawkbit-events-defaults.properties")
 public class EventPublisherConfiguration {
 
+    private final ConfigurableEnvironment environment;
+
+    public EventPublisherConfiguration(ConfigurableEnvironment environment) {
+        this.environment = environment;
+    }
+
+    @PostConstruct
+    public void registerProperties() {
+        try {
+            ResourcePropertySource props = new ResourcePropertySource("classpath:/hawkbit-events-defaults.properties");
+            // load manually to ensure that they are with the lowest precedence allowing to override them
+            environment.getPropertySources().addLast(props);
+        } catch (IOException ex) {
+            log.error("Failed to load default properties for event publisher", ex);
+        }
+    }
+
     /**
      * Server internal event publisher that allows parallel event processing if the event listener is marked as so.
      *
@@ -116,29 +139,22 @@ public class EventPublisherConfiguration {
         return publisher::publishEvent;
     }
 
+    @Bean
     @ConditionalOnProperty(name = "org.eclipse.hawkbit.events.remote-enabled", havingValue = "true")
-    @ConditionalOnProperty(name = "spring.cloud.stream.default.content-type", havingValue = "application/binary+stuff")
-    protected static class EventProtoStuffAutoConfiguration {
+    public MessageConverter eventMessageConverter(BindingProperties bindingProperties) {
 
-        /**
-         * @return the protostuff io message converter for events
-         */
-        @Bean
-        public MessageConverter eventProtoStuffConverter() {
-            return new EventProtoStuffMessageConverter();
+        final String contentType = bindingProperties.getContentType();
+
+        if (contentType == null) {
+            throw new IllegalStateException("RemoteEvents are enabled and Content type must be specified in spring.cloud.stream.default.content-type.");
         }
-    }
 
-    @ConditionalOnProperty(name = "org.eclipse.hawkbit.events.remote-enabled", havingValue = "true")
-    @ConditionalOnProperty(name = "spring.cloud.stream.default.content-type", havingValue = "application/remote-event-json")
-    protected static class EventJacksonAutoConfiguration {
-
-        /**
-         * @return the Jackson message converter for events
-         */
-        @Bean
-        public MessageConverter eventJacksonMessageConverter() {
+        if (contentType.equals("application/binary+protostuff")) {
+            return new EventProtoStuffMessageConverter();
+        } else if (contentType.equals("application/remote-event-json")) {
             return new EventJacksonMessageConverter();
+        } else {
+            throw new IllegalStateException("Unsupported content type: " + contentType + ". Supported types: application/x-protostuff, application/remote-event-json");
         }
     }
 }

hawkbit-repository/hawkbit-repository-core/src/main/java/org/eclipse/hawkbit/repository/event/EventPublisherHolder.java

@@ -16,8 +16,8 @@ import jakarta.annotation.PostConstruct;
 import lombok.extern.slf4j.Slf4j;
 import org.eclipse.hawkbit.repository.event.remote.AbstractRemoteEvent;
 import org.eclipse.hawkbit.repository.event.remote.CancelTargetAssignmentEvent;
-import org.eclipse.hawkbit.repository.event.remote.MultiActionCancelEvent;
 import org.eclipse.hawkbit.repository.event.remote.MultiActionAssignEvent;
+import org.eclipse.hawkbit.repository.event.remote.MultiActionCancelEvent;
 import org.eclipse.hawkbit.repository.event.remote.TargetAssignDistributionSetEvent;
 import org.eclipse.hawkbit.repository.event.remote.TargetAttributesRequestedEvent;
 import org.eclipse.hawkbit.repository.event.remote.TargetDeletedEvent;

hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/repository/jpa/model/JpaDistributionSet.java

@@ -10,7 +10,6 @@
 package org.eclipse.hawkbit.repository.jpa.model;
 
 import java.io.Serial;
-import java.util.Collection;
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.Map;