eric-maynard commented on code in PR #922:
URL: https://github.com/apache/polaris/pull/922#discussion_r1978024470


##########
quarkus/defaults/src/main/resources/application.properties:
##########
@@ -94,6 +94,8 @@ polaris.persistence.type=in-memory
 
 polaris.file-io.type=default
 
+polaris.events.type=default

Review Comment:
   Can this just be like `polaris.events.listener`?



##########
service/common/src/main/java/org/apache/polaris/service/events/BeforeTableRefreshEvent.java:
##########
@@ -0,0 +1,29 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 org.apache.polaris.service.events;
+
+import org.apache.iceberg.catalog.TableIdentifier;
+
+/**
+ * Emitted when Polaris intends to refresh its known version of a table's 
metadata by fetching the
+ * latest.
+ *
+ * @param tableIdentifier The identifier of the table being refreshed.
+ */
+public record BeforeTableRefreshEvent(TableIdentifier tableIdentifier) {}

Review Comment:
   The events don't have a shared parent type?



##########
quarkus/service/src/main/java/org/apache/polaris/service/quarkus/events/QuarkusPolarisEventListenerConfiguration.java:
##########
@@ -0,0 +1,32 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 org.apache.polaris.service.quarkus.events;
+
+import io.quarkus.runtime.annotations.StaticInitSafe;
+import io.smallrye.config.ConfigMapping;
+
+@StaticInitSafe
+@ConfigMapping(prefix = "polaris.events")
+public interface QuarkusPolarisEventListenerConfiguration {
+  /**
+   * The type of the event listener to use. Must be a registered {@link
+   * org.apache.polaris.service.events.PolarisEventListener} identifier.
+   */
+  String type();

Review Comment:
   `type` is a name we should perhaps avoid



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