org.apache.bookkeeper.client.impl.LedgerEntryImpl Maven / Gradle / Ivy
/*
* 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.client.impl;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.util.Recycler;
import io.netty.util.Recycler.Handle;
import io.netty.util.ReferenceCountUtil;
import java.nio.ByteBuffer;
import org.apache.bookkeeper.client.api.LedgerEntry;
/**
* Ledger entry. Its a simple tuple containing the ledger id, the entry-id, and
* the entry content.
*/
public class LedgerEntryImpl implements LedgerEntry {
private static final Recycler RECYCLER = new Recycler() {
@Override
protected LedgerEntryImpl newObject(Handle handle) {
return new LedgerEntryImpl(handle);
}
};
public static LedgerEntryImpl create(long ledgerId,
long entryId) {
LedgerEntryImpl entry = RECYCLER.get();
entry.ledgerId = ledgerId;
entry.entryId = entryId;
return entry;
}
public static LedgerEntryImpl create(long ledgerId,
long entryId,
long length,
ByteBuf buf) {
LedgerEntryImpl entry = RECYCLER.get();
entry.ledgerId = ledgerId;
entry.entryId = entryId;
entry.length = length;
entry.entryBuf = buf;
return entry;
}
public static LedgerEntryImpl duplicate(LedgerEntry entry) {
return create(
entry.getLedgerId(),
entry.getEntryId(),
entry.getLength(),
entry.getEntryBuffer().retainedSlice());
}
private final Handle recycleHandle;
private long ledgerId;
private long entryId;
private long length;
private ByteBuf entryBuf;
private LedgerEntryImpl(Handle handle) {
this.recycleHandle = handle;
}
public void setEntryId(long entryId) {
this.entryId = entryId;
}
public void setLength(long length) {
this.length = length;
}
public void setEntryBuf(ByteBuf buf) {
ReferenceCountUtil.release(entryBuf);
this.entryBuf = buf;
}
/**
* {@inheritDoc}
*/
@Override
public long getLedgerId() {
return ledgerId;
}
/**
* {@inheritDoc}
*/
@Override
public long getEntryId() {
return entryId;
}
/**
* {@inheritDoc}
*/
@Override
public long getLength() {
return length;
}
/**
* {@inheritDoc}
*/
@Override
public byte[] getEntryBytes() {
return ByteBufUtil.getBytes(entryBuf, entryBuf.readerIndex(), entryBuf.readableBytes(), false);
}
/**
* {@inheritDoc}
*/
@Override
public ByteBuf getEntryBuffer() {
return entryBuf;
}
/**
* {@inheritDoc}
*/
@Override
public ByteBuffer getEntryNioBuffer() {
return entryBuf.nioBuffer();
}
/**
* {@inheritDoc}
*/
@Override
public LedgerEntryImpl duplicate() {
return duplicate(this);
}
/**
* {@inheritDoc}
*/
@Override
public void close() {
recycle();
}
private void recycle() {
this.ledgerId = -1L;
this.entryId = -1L;
this.length = -1L;
ReferenceCountUtil.release(entryBuf);
this.entryBuf = null;
recycleHandle.recycle(this);
}
}