org.apache.pulsar.common.api.raw.ReferenceCountedMessageMetadata 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.pulsar.common.api.raw;
import org.apache.pulsar.shade.io.netty.buffer.ByteBuf;
import org.apache.pulsar.shade.io.netty.util.AbstractReferenceCounted;
import org.apache.pulsar.shade.io.netty.util.Recycler;
import org.apache.pulsar.shade.io.netty.util.ReferenceCounted;
import org.apache.pulsar.common.api.proto.MessageMetadata;
/**
* Class representing a reference-counted object that requires explicit deallocation.
*/
public class ReferenceCountedMessageMetadata extends AbstractReferenceCounted {
private static final Recycler RECYCLER = //
new Recycler() {
@Override
protected ReferenceCountedMessageMetadata newObject(Handle handle) {
return new ReferenceCountedMessageMetadata(handle);
}
};
private final MessageMetadata metadata = new MessageMetadata();
private ByteBuf parsedBuf;
private final Recycler.Handle handle;
private ReferenceCountedMessageMetadata(Recycler.Handle handle) {
this.handle = handle;
}
public static ReferenceCountedMessageMetadata get(ByteBuf parsedBuf) {
ReferenceCountedMessageMetadata ref = RECYCLER.get();
ref.parsedBuf = parsedBuf;
ref.parsedBuf.retain();
ref.setRefCnt(1);
return ref;
}
public MessageMetadata getMetadata() {
return metadata;
}
@Override
public ReferenceCounted touch(Object hint) {
return this;
}
@Override
protected void deallocate() {
if (parsedBuf != null) {
parsedBuf.release();
}
metadata.clear();
handle.recycle(this);
}
}