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Extracted interface for EntryCacheManager (apache#15933)
* Extracted interface for EntryCacheManager * Fixed references * added more methods to the interface * Fixed mocked test * Removed unused import * Fixed wrong casting in reflection access
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147 changes: 147 additions & 0 deletions
147
...ged-ledger/src/main/java/org/apache/bookkeeper/mledger/impl/cache/EntryCacheDisabled.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| /** | ||
| * 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.impl.cache; | ||
|
|
||
| import static org.apache.bookkeeper.mledger.impl.ManagedLedgerImpl.createManagedLedgerException; | ||
| import com.google.common.collect.Lists; | ||
| import com.google.common.primitives.Longs; | ||
| import java.util.Iterator; | ||
| import java.util.List; | ||
| import org.apache.bookkeeper.client.api.LedgerEntry; | ||
| import org.apache.bookkeeper.client.api.ReadHandle; | ||
| import org.apache.bookkeeper.mledger.AsyncCallbacks; | ||
| import org.apache.bookkeeper.mledger.Entry; | ||
| import org.apache.bookkeeper.mledger.ManagedLedgerException; | ||
| import org.apache.bookkeeper.mledger.impl.EntryImpl; | ||
| import org.apache.bookkeeper.mledger.impl.ManagedLedgerImpl; | ||
| import org.apache.bookkeeper.mledger.impl.PositionImpl; | ||
| import org.apache.bookkeeper.mledger.intercept.ManagedLedgerInterceptor; | ||
| import org.apache.commons.lang3.tuple.Pair; | ||
|
|
||
| /** | ||
| * Implementation of cache that always read from BookKeeper. | ||
| */ | ||
| public class EntryCacheDisabled implements EntryCache { | ||
| private final ManagedLedgerImpl ml; | ||
| private final ManagedLedgerInterceptor interceptor; | ||
|
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| public EntryCacheDisabled(ManagedLedgerImpl ml) { | ||
| this.ml = ml; | ||
| this.interceptor = ml.getManagedLedgerInterceptor(); | ||
| } | ||
|
|
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| @Override | ||
| public String getName() { | ||
| return ml.getName(); | ||
| } | ||
|
|
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| @Override | ||
| public boolean insert(EntryImpl entry) { | ||
| return false; | ||
| } | ||
|
|
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| @Override | ||
| public void invalidateEntries(PositionImpl lastPosition) { | ||
| } | ||
|
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| @Override | ||
| public void invalidateAllEntries(long ledgerId) { | ||
| } | ||
|
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| @Override | ||
| public void clear() { | ||
| } | ||
|
|
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| @Override | ||
| public Pair<Integer, Long> evictEntries(long sizeToFree) { | ||
| return Pair.of(0, (long) 0); | ||
| } | ||
|
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| @Override | ||
| public void invalidateEntriesBeforeTimestamp(long timestamp) { | ||
| } | ||
|
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| @Override | ||
| public void asyncReadEntry(ReadHandle lh, long firstEntry, long lastEntry, boolean isSlowestReader, | ||
| final AsyncCallbacks.ReadEntriesCallback callback, Object ctx) { | ||
| lh.readAsync(firstEntry, lastEntry).thenAcceptAsync( | ||
| ledgerEntries -> { | ||
| List<Entry> entries = Lists.newArrayList(); | ||
| long totalSize = 0; | ||
| try { | ||
| for (LedgerEntry e : ledgerEntries) { | ||
| // Insert the entries at the end of the list (they will be unsorted for now) | ||
| EntryImpl entry = RangeEntryCacheManagerImpl.create(e, interceptor); | ||
| entries.add(entry); | ||
| totalSize += entry.getLength(); | ||
| } | ||
| } finally { | ||
| ledgerEntries.close(); | ||
| } | ||
| ml.getFactory().getMbean().recordCacheMiss(entries.size(), totalSize); | ||
| ml.getMbean().addReadEntriesSample(entries.size(), totalSize); | ||
|
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| callback.readEntriesComplete(entries, ctx); | ||
| }, ml.getExecutor().chooseThread(ml.getName())).exceptionally(exception -> { | ||
| callback.readEntriesFailed(createManagedLedgerException(exception), ctx); | ||
| return null; | ||
| }); | ||
| } | ||
|
|
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| @Override | ||
| public void asyncReadEntry(ReadHandle lh, PositionImpl position, AsyncCallbacks.ReadEntryCallback callback, | ||
| Object ctx) { | ||
| lh.readAsync(position.getEntryId(), position.getEntryId()).whenCompleteAsync( | ||
| (ledgerEntries, exception) -> { | ||
| if (exception != null) { | ||
| ml.invalidateLedgerHandle(lh); | ||
| callback.readEntryFailed(createManagedLedgerException(exception), ctx); | ||
| return; | ||
| } | ||
|
|
||
| try { | ||
| Iterator<LedgerEntry> iterator = ledgerEntries.iterator(); | ||
| if (iterator.hasNext()) { | ||
| LedgerEntry ledgerEntry = iterator.next(); | ||
| EntryImpl returnEntry = RangeEntryCacheManagerImpl.create(ledgerEntry, interceptor); | ||
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| ml.getFactory().getMbean().recordCacheMiss(1, returnEntry.getLength()); | ||
| ml.getMbean().addReadEntriesSample(1, returnEntry.getLength()); | ||
| callback.readEntryComplete(returnEntry, ctx); | ||
| } else { | ||
| callback.readEntryFailed(new ManagedLedgerException("Could not read given position"), | ||
| ctx); | ||
| } | ||
| } finally { | ||
| ledgerEntries.close(); | ||
| } | ||
| }, ml.getExecutor().chooseThread(ml.getName())); | ||
| } | ||
|
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| @Override | ||
| public long getSize() { | ||
| return 0; | ||
| } | ||
|
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| @Override | ||
| public int compareTo(EntryCache other) { | ||
| return Longs.compare(getSize(), other.getSize()); | ||
| } | ||
|
|
||
| } |
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39 changes: 39 additions & 0 deletions
39
managed-ledger/src/main/java/org/apache/bookkeeper/mledger/impl/cache/EntryCacheManager.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| /** | ||
| * 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.impl.cache; | ||
|
|
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| import org.apache.bookkeeper.mledger.impl.ManagedLedgerImpl; | ||
|
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| public interface EntryCacheManager { | ||
| EntryCache getEntryCache(ManagedLedgerImpl ml); | ||
|
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| void removeEntryCache(String name); | ||
|
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| long getSize(); | ||
|
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| long getMaxSize(); | ||
|
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| void clear(); | ||
|
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| void updateCacheSizeAndThreshold(long maxSize); | ||
|
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| void updateCacheEvictionWatermark(double cacheEvictionWatermark); | ||
|
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| double getCacheEvictionWatermark(); | ||
| } |
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