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Introduce RocksDbSegmentIdentifier to avoid changing the storege plug… (
hyperledger#3755) * Introduce RocksDbSegmentIdentifier to avoid changing the storege plugin interface Signed-off-by: Fabio Di Fabio <[email protected]>
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...n/java/org/hyperledger/besu/plugin/services/storage/rocksdb/RocksDbSegmentIdentifier.java
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|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| /* | ||
| * Copyright Hyperledger Besu Contributors. | ||
| * | ||
| * Licensed 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. | ||
| * | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
| package org.hyperledger.besu.plugin.services.storage.rocksdb; | ||
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| import org.hyperledger.besu.plugin.services.exception.StorageException; | ||
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| import java.util.Objects; | ||
| import java.util.concurrent.atomic.AtomicReference; | ||
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| import org.rocksdb.ColumnFamilyDescriptor; | ||
| import org.rocksdb.ColumnFamilyHandle; | ||
| import org.rocksdb.RocksDBException; | ||
| import org.rocksdb.TransactionDB; | ||
|
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| public class RocksDbSegmentIdentifier { | ||
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| private final TransactionDB db; | ||
| private final AtomicReference<ColumnFamilyHandle> reference; | ||
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| public RocksDbSegmentIdentifier( | ||
| final TransactionDB db, final ColumnFamilyHandle columnFamilyHandle) { | ||
| this.db = db; | ||
| this.reference = new AtomicReference<>(columnFamilyHandle); | ||
| } | ||
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| public void reset() { | ||
| reference.getAndUpdate( | ||
| oldHandle -> { | ||
| try { | ||
| ColumnFamilyDescriptor descriptor = | ||
| new ColumnFamilyDescriptor( | ||
| oldHandle.getName(), oldHandle.getDescriptor().getOptions()); | ||
| db.dropColumnFamily(oldHandle); | ||
| ColumnFamilyHandle newHandle = db.createColumnFamily(descriptor); | ||
| oldHandle.close(); | ||
| return newHandle; | ||
| } catch (final RocksDBException e) { | ||
| throw new StorageException(e); | ||
| } | ||
| }); | ||
| } | ||
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| public ColumnFamilyHandle get() { | ||
| return reference.get(); | ||
| } | ||
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| @Override | ||
| public boolean equals(final Object o) { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
| if (o == null || getClass() != o.getClass()) { | ||
| return false; | ||
| } | ||
| RocksDbSegmentIdentifier that = (RocksDbSegmentIdentifier) o; | ||
| return Objects.equals(reference.get(), that.reference.get()); | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return reference.get().hashCode(); | ||
| } | ||
| } |
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