[GitHub] [kafka] guozhangwang commented on a change in pull request #9222: KAFKA-10437: Implement test-utils and StateStore changes for KIP-478

[GitBox <gi...@apache.org>]

guozhangwang commented on a change in pull request #9222:
URL: https://github.com/apache/kafka/pull/9222#discussion_r477676262



##########
File path: streams/src/main/java/org/apache/kafka/streams/processor/StateStoreContext.java
##########
@@ -0,0 +1,112 @@
+/*
+ * 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.kafka.streams.processor;
+
+import org.apache.kafka.common.serialization.Serde;
+import org.apache.kafka.streams.StreamsMetrics;
+import org.apache.kafka.streams.errors.StreamsException;
+
+import java.io.File;
+import java.util.Map;
+
+/**
+ * Processor context interface.
+ */
+public interface StateStoreContext {
+
+    /**
+     * Returns the application id.
+     *
+     * @return the application id
+     */
+    String applicationId();

Review comment:
       Are appId / taskId / metrics / appConfigs only needed for state store context? Is it possible that they would also be used within Processor?




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