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/*
*
* 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.qpid.server.store;
import java.util.Map;
import java.util.concurrent.atomic.AtomicLong;
import org.apache.qpid.server.message.EnqueueableMessage;
import org.apache.qpid.server.message.MessageContentSource;
import org.apache.qpid.server.model.ConfiguredObject;
public class QuotaMessageStore extends NullMessageStore
{
public static final String TYPE = "QuotaMessageStore";
private final AtomicLong _messageId = new AtomicLong(1);
private long _totalStoreSize;;
private boolean _limitBusted;
private long _persistentSizeLowThreshold;
private long _persistentSizeHighThreshold;
private final EventManager _eventManager = new EventManager();
@Override
public void openMessageStore(ConfiguredObject<?> parent, Map<String, Object> messageStoreSettings)
{
Object overfullAttr = messageStoreSettings.get(MessageStore.OVERFULL_SIZE);
_persistentSizeHighThreshold = overfullAttr == null
? Long.MAX_VALUE
: overfullAttr instanceof Number
? ((Number)overfullAttr).longValue()
: Long.parseLong(overfullAttr.toString());
Object underfullAttr = messageStoreSettings.get(MessageStore.UNDERFULL_SIZE);
_persistentSizeLowThreshold = overfullAttr == null
? _persistentSizeHighThreshold
: underfullAttr instanceof Number
? ((Number)underfullAttr).longValue()
: Long.parseLong(underfullAttr.toString());
if (_persistentSizeLowThreshold > _persistentSizeHighThreshold || _persistentSizeLowThreshold < 0l)
{
_persistentSizeLowThreshold = _persistentSizeHighThreshold;
}
}
@SuppressWarnings("unchecked")
@Override
public StoredMessage<StorableMessageMetaData> addMessage(StorableMessageMetaData metaData)
{
final long id = _messageId.getAndIncrement();
return new StoredMemoryMessage(id, metaData);
}
@Override
public Transaction newTransaction()
{
return new Transaction()
{
private AtomicLong _storeSizeIncrease = new AtomicLong();
@Override
public StoreFuture commitTranAsync()
{
QuotaMessageStore.this.storedSizeChange(_storeSizeIncrease.intValue());
return StoreFuture.IMMEDIATE_FUTURE;
}
@Override
public void enqueueMessage(TransactionLogResource queue, EnqueueableMessage message)
{
_storeSizeIncrease.addAndGet(((MessageContentSource)message).getSize());
}
@Override
public void dequeueMessage(TransactionLogResource queue, EnqueueableMessage message)
{
_storeSizeIncrease.addAndGet(-((MessageContentSource)message).getSize());
}
@Override
public void commitTran()
{
QuotaMessageStore.this.storedSizeChange(_storeSizeIncrease.intValue());
}
@Override
public void abortTran()
{
}
@Override
public void removeXid(long format, byte[] globalId, byte[] branchId)
{
}
@Override
public void recordXid(long format, byte[] globalId, byte[] branchId, Record[] enqueues, Record[] dequeues)
{
}
};
}
@Override
public boolean isPersistent()
{
return true;
}
@Override
public void addEventListener(EventListener eventListener, Event... events)
{
_eventManager.addEventListener(eventListener, events);
}
private void storedSizeChange(final int delta)
{
if(_persistentSizeHighThreshold > 0)
{
synchronized (this)
{
long newSize = _totalStoreSize += delta;
if(!_limitBusted && newSize > _persistentSizeHighThreshold)
{
_limitBusted = true;
_eventManager.notifyEvent(Event.PERSISTENT_MESSAGE_SIZE_OVERFULL);
}
else if(_limitBusted && newSize < _persistentSizeHighThreshold)
{
_limitBusted = false;
_eventManager.notifyEvent(Event.PERSISTENT_MESSAGE_SIZE_UNDERFULL);
}
}
}
}
@Override
public String getStoreType()
{
return TYPE;
}
}
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