[GitHub] [pulsar] sijie commented on a change in pull request #9397: [ML] Make ManagedLedger storage configurable

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

sijie commented on a change in pull request #9397:
URL: https://github.com/apache/pulsar/pull/9397#discussion_r568467892



##########
File path: pulsar-broker/src/main/java/org/apache/pulsar/broker/storage/ManagedLedgerStorage.java
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@@ -0,0 +1,95 @@
+/**
+ * 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.pulsar.broker.storage;
+
+import java.io.IOException;
+import org.apache.bookkeeper.client.BookKeeper;
+import org.apache.bookkeeper.mledger.ManagedLedgerFactory;
+import org.apache.bookkeeper.stats.StatsProvider;
+import org.apache.pulsar.broker.BookKeeperClientFactory;
+import org.apache.pulsar.broker.ServiceConfiguration;
+import org.apache.pulsar.common.classification.InterfaceAudience.Private;
+import org.apache.pulsar.common.classification.InterfaceStability.Unstable;
+import org.apache.zookeeper.ZooKeeper;
+
+/**
+ * Storage to access {@link org.apache.bookkeeper.mledger.ManagedLedger}s.
+ */
+@Private
+@Unstable
+public interface ManagedLedgerStorage extends AutoCloseable {
+
+    /**
+     * Initialize the managed ledger storage.
+     *
+     * @param conf service config
+     * @param zkClient zk client
+     * @param bookkeperProvider bookkeeper provider
+     * @throws Exception
+     */
+    void initialize(ServiceConfiguration conf,
+                    ZooKeeper zkClient,
+                    BookKeeperClientFactory bookkeperProvider) throws Exception;
+
+    /**
+     * Return the factory to create {@link ManagedLedgerFactory}.
+     *
+     * @return the factory to create {@link ManagedLedgerFactory}.
+     */
+    ManagedLedgerFactory getManagedLedgerFactory();
+
+    /**
+     * Return the stats provider to expose the stats of the storage implementation.
+     *
+     * @return the stats provider.
+     */
+    StatsProvider getStatsProvider();
+
+    /**
+     * Return the default bookkeeper client.
+     *
+     * @return the default bookkeeper client.
+     */
+    BookKeeper getBookKeeperClient();

Review comment:
       @codelipenghui This is the first attempt to provide an interface. It is a bit difficult to hide everything at this moment. Hence I marked the interface as private and unstable. So we can iterate changes over this interface.




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