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[tiered storage] Provide LedgerOffloaderFactory for creating offloade…
…rs (apache#2392) * [tiered storage] Provide LedgerOffloaderFactory for creating offloaders ### Motivation In order to use NAR for packaging offloaders, we need a factory interface for creating offloaders. ### Changes - Provide a ledger offloader factory interface for creating offloaders. - Move implemention specific settings to implementation package to be respecting to offloader factory interface * remove unneeded change
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57 changes: 57 additions & 0 deletions
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managed-ledger/src/main/java/org/apache/bookkeeper/mledger/LedgerOffloaderFactory.java
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| /** | ||
| * 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.bookkeeper.mledger; | ||
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| import java.io.IOException; | ||
| import java.util.Map; | ||
| import java.util.Properties; | ||
| import org.apache.bookkeeper.common.annotation.InterfaceAudience.LimitedPrivate; | ||
| import org.apache.bookkeeper.common.annotation.InterfaceStability.Evolving; | ||
| import org.apache.bookkeeper.common.util.OrderedScheduler; | ||
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| /** | ||
| * Factory to create {@link LedgerOffloader} to offload ledgers into long-term storage. | ||
| */ | ||
| @LimitedPrivate | ||
| @Evolving | ||
| public interface LedgerOffloaderFactory<T extends LedgerOffloader> { | ||
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| /** | ||
| * Check whether the provided driver <tt>driverName</tt> is supported. | ||
| * | ||
| * @param driverName offloader driver name | ||
| * @return true if the driver is supported, otherwise false. | ||
| */ | ||
| boolean isDriverSupported(String driverName); | ||
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| /** | ||
| * Create a ledger offloader with the provided configuration, user-metadata and scheduler. | ||
| * | ||
| * @param properties service configuration | ||
| * @param userMetadata user metadata | ||
| * @param scheduler scheduler | ||
| * @return the offloader instance | ||
| * @throws IOException when fail to create an offloader | ||
| */ | ||
| T create(Properties properties, | ||
| Map<String, String> userMetadata, | ||
| OrderedScheduler scheduler) | ||
| throws IOException; | ||
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| } |
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51 changes: 51 additions & 0 deletions
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.../main/java/org/apache/bookkeeper/mledger/offload/jcloud/JCloudLedgerOffloaderFactory.java
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| /** | ||
| * 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.bookkeeper.mledger.offload.jcloud; | ||
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| import java.io.IOException; | ||
| import java.util.Map; | ||
| import java.util.Properties; | ||
| import org.apache.bookkeeper.common.util.OrderedScheduler; | ||
| import org.apache.bookkeeper.mledger.LedgerOffloaderFactory; | ||
| import org.apache.bookkeeper.mledger.offload.jcloud.impl.BlobStoreManagedLedgerOffloader; | ||
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| /** | ||
| * A jcloud based offloader factory. | ||
| */ | ||
| public class JCloudLedgerOffloaderFactory implements LedgerOffloaderFactory<BlobStoreManagedLedgerOffloader> { | ||
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| public static JCloudLedgerOffloaderFactory of() { | ||
| return INSTANCE; | ||
| } | ||
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| private static final JCloudLedgerOffloaderFactory INSTANCE = new JCloudLedgerOffloaderFactory(); | ||
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| @Override | ||
| public boolean isDriverSupported(String driverName) { | ||
| return BlobStoreManagedLedgerOffloader.driverSupported(driverName); | ||
| } | ||
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| @Override | ||
| public BlobStoreManagedLedgerOffloader create(Properties properties, | ||
| Map<String, String> userMetadata, | ||
| OrderedScheduler scheduler) throws IOException { | ||
| TieredStorageConfigurationData data = TieredStorageConfigurationData.create(properties); | ||
| return BlobStoreManagedLedgerOffloader.create(data, userMetadata, scheduler); | ||
| } | ||
| } |
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