XJDKC commented on code in PR #2523:
URL: https://github.com/apache/polaris/pull/2523#discussion_r2402593596


##########
runtime/defaults/src/main/resources/application.properties:
##########
@@ -197,6 +197,19 @@ polaris.oidc.principal-roles-mapper.type=default
 # polaris.storage.gcp.token=token
 # polaris.storage.gcp.lifespan=PT1H
 
+# Polaris Service Identity Config

Review Comment:
   Done!



##########
polaris-core/src/main/java/org/apache/polaris/core/identity/credential/ServiceIdentityCredential.java:
##########
@@ -0,0 +1,90 @@
+/*
+ * 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.core.identity.credential;
+
+import jakarta.annotation.Nonnull;
+import jakarta.annotation.Nullable;
+import org.apache.polaris.core.admin.model.ServiceIdentityInfo;
+import org.apache.polaris.core.identity.ServiceIdentityType;
+import org.apache.polaris.core.identity.dpo.ServiceIdentityInfoDpo;
+import org.apache.polaris.core.secrets.SecretReference;
+import software.amazon.awssdk.annotations.NotNull;
+
+/**
+ * Represents a service identity credential used by Polaris to authenticate to 
external systems.
+ *
+ * <p>This class encapsulates both the service identity metadata (e.g., AWS 
IAM ARN) and the
+ * associated credentials (e.g., AWS access keys) needed to authenticate as 
the Polaris service when
+ * accessing external catalog services.
+ *
+ * <p>The credential contains:
+ *
+ * <ul>
+ *   <li>Identity type (e.g., AWS_IAM)
+ *   <li>A {@link SecretReference} pointing to where the credential 
configuration is stored
+ *   <li>The actual authentication credentials (implementation-specific, e.g.,
+ *       AwsCredentialsProvider)
+ * </ul>
+ */
+public abstract class ServiceIdentityCredential {
+  private final ServiceIdentityType identityType;
+  private SecretReference identityInfoReference;

Review Comment:
   Done!



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