| /** |
| * Copyright 2016 Yahoo Inc. |
| * |
| * 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. |
| */ |
| package org.apache.bookkeeper.mledger.impl; |
| |
| import org.apache.bookkeeper.client.LedgerEntry; |
| import org.apache.bookkeeper.mledger.Entry; |
| |
| import com.google.common.collect.ComparisonChain; |
| |
| import io.netty.buffer.ByteBuf; |
| import io.netty.buffer.RecyclableDuplicateByteBuf; |
| import io.netty.buffer.Unpooled; |
| import io.netty.util.AbstractReferenceCounted; |
| import io.netty.util.Recycler; |
| import io.netty.util.Recycler.Handle; |
| import io.netty.util.ReferenceCounted; |
| |
| final class EntryImpl extends AbstractReferenceCounted implements Entry, Comparable<EntryImpl>, ReferenceCounted { |
| |
| private static final Recycler<EntryImpl> RECYCLER = new Recycler<EntryImpl>() { |
| @Override |
| protected EntryImpl newObject(Handle handle) { |
| return new EntryImpl(handle); |
| } |
| }; |
| |
| private final Handle recyclerHandle; |
| private long ledgerId; |
| private long entryId; |
| ByteBuf data; |
| |
| public static EntryImpl create(LedgerEntry ledgerEntry) { |
| EntryImpl entry = RECYCLER.get(); |
| entry.ledgerId = ledgerEntry.getLedgerId(); |
| entry.entryId = ledgerEntry.getEntryId(); |
| entry.data = ledgerEntry.getEntryBuffer(); |
| entry.data.retain(); |
| entry.setRefCnt(1); |
| return entry; |
| } |
| |
| // Used just for tests |
| public static EntryImpl create(long ledgerId, long entryId, byte[] data) { |
| EntryImpl entry = RECYCLER.get(); |
| entry.ledgerId = ledgerId; |
| entry.entryId = entryId; |
| entry.data = Unpooled.wrappedBuffer(data); |
| entry.setRefCnt(1); |
| return entry; |
| } |
| |
| public static EntryImpl create(long ledgerId, long entryId, ByteBuf data) { |
| EntryImpl entry = RECYCLER.get(); |
| entry.ledgerId = ledgerId; |
| entry.entryId = entryId; |
| entry.data = data; |
| entry.data.retain(); |
| entry.setRefCnt(1); |
| return entry; |
| } |
| |
| public static EntryImpl create(PositionImpl position, ByteBuf data) { |
| EntryImpl entry = RECYCLER.get(); |
| entry.ledgerId = position.getLedgerId(); |
| entry.entryId = position.getEntryId(); |
| entry.data = data; |
| entry.data.retain(); |
| entry.setRefCnt(1); |
| return entry; |
| } |
| |
| public static EntryImpl create(EntryImpl other) { |
| EntryImpl entry = RECYCLER.get(); |
| entry.ledgerId = other.ledgerId; |
| entry.entryId = other.entryId; |
| entry.data = RecyclableDuplicateByteBuf.create(other.data); |
| entry.setRefCnt(1); |
| return entry; |
| } |
| |
| private EntryImpl(Recycler.Handle recyclerHandle) { |
| this.recyclerHandle = recyclerHandle; |
| } |
| |
| @Override |
| public ByteBuf getDataBuffer() { |
| return data; |
| } |
| |
| @Override |
| public byte[] getData() { |
| byte[] array = new byte[(int) data.readableBytes()]; |
| data.getBytes(data.readerIndex(), array); |
| return array; |
| } |
| |
| // Only for test |
| @Override |
| public byte[] getDataAndRelease() { |
| byte[] array = getData(); |
| release(); |
| return array; |
| } |
| |
| @Override |
| public int getLength() { |
| return data.readableBytes(); |
| } |
| |
| @Override |
| public PositionImpl getPosition() { |
| return new PositionImpl(ledgerId, entryId); |
| } |
| |
| @Override |
| public int compareTo(EntryImpl other) { |
| return ComparisonChain.start().compare(ledgerId, other.ledgerId).compare(entryId, other.entryId).result(); |
| } |
| |
| @Override |
| protected void deallocate() { |
| // This method is called whenever the ref-count of the EntryImpl reaches 0, so that now we can recycle it |
| data.release(); |
| data = null; |
| ledgerId = -1; |
| entryId = -1; |
| RECYCLER.recycle(this, recyclerHandle); |
| } |
| |
| } |