/*
* 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.activemq.artemis.core.paging.cursor;
import java.lang.ref.WeakReference;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.activemq.artemis.api.core.Message;
import org.apache.activemq.artemis.core.paging.PagedMessage;
import org.apache.activemq.artemis.core.server.ActiveMQServerLogger;
import org.apache.activemq.artemis.core.server.MessageReference;
import org.apache.activemq.artemis.core.server.Queue;
import org.apache.activemq.artemis.core.server.impl.AckReason;
import org.apache.activemq.artemis.core.transaction.Transaction;
import org.jboss.logging.Logger;
public class PagedReferenceImpl implements PagedReference {
private static final Logger logger = Logger.getLogger(PagedReferenceImpl.class);
private final PagePosition position;
private WeakReference<PagedMessage> message;
private Long deliveryTime = null;
private int persistedCount;
private int messageEstimate = -1;
private Long consumerId;
private final AtomicInteger deliveryCount = new AtomicInteger(0);
private final PageSubscription subscription;
private boolean alreadyAcked;
private Object protocolData;
@Override
public Object getProtocolData() {
return protocolData;
}
@Override
public void setProtocolData(Object protocolData) {
this.protocolData = protocolData;
}
@Override
public Message getMessage() {
return getPagedMessage().getMessage();
}
@Override
public synchronized PagedMessage getPagedMessage() {
PagedMessage returnMessage = message != null ? message.get() : null;
// We only keep a few references on the Queue from paging...
// Besides those references are SoftReferenced on page cache...
// So, this will unlikely be null,
// unless the Queue has stalled for some time after paging
if (returnMessage == null) {
// reference is gone, we will reconstruct it
returnMessage = subscription.queryMessage(position);
message = new WeakReference<>(returnMessage);
}
return returnMessage;
}
@Override
public PagePosition getPosition() {
return position;
}
public PagedReferenceImpl(final PagePosition position,
final PagedMessage message,
final PageSubscription subscription) {
this.position = position;
this.message = new WeakReference<>(message);
this.subscription = subscription;
}
@Override
public boolean isPaged() {
return true;
}
@Override
public void setPersistedCount(int count) {
this.persistedCount = count;
}
@Override
public int getPersistedCount() {
return persistedCount;
}
@Override
public int getMessageMemoryEstimate() {
if (messageEstimate <= 0) {
try {
messageEstimate = getMessage().getMemoryEstimate();
} catch (Throwable e) {
ActiveMQServerLogger.LOGGER.warn(e.getMessage(), e);
}
}
return messageEstimate;
}
@Override
public MessageReference copy(final Queue queue) {
return new PagedReferenceImpl(this.position, this.getPagedMessage(), this.subscription);
}
@Override
public long getScheduledDeliveryTime() {
if (deliveryTime == null) {
try {
Message msg = getMessage();
return msg.getScheduledDeliveryTime();
} catch (Throwable e) {
ActiveMQServerLogger.LOGGER.warn(e.getMessage(), e);
return 0L;
}
}
return deliveryTime;
}
@Override
public void setScheduledDeliveryTime(final long scheduledDeliveryTime) {
deliveryTime = scheduledDeliveryTime;
}
@Override
public int getDeliveryCount() {
return deliveryCount.get();
}
@Override
public void setDeliveryCount(final int deliveryCount) {
this.deliveryCount.set(deliveryCount);
}
@Override
public void incrementDeliveryCount() {
deliveryCount.incrementAndGet();
if (logger.isTraceEnabled()) {
logger.trace("++deliveryCount = " + deliveryCount + " for " + this, new Exception("trace"));
}
}
@Override
public void decrementDeliveryCount() {
deliveryCount.decrementAndGet();
if (logger.isTraceEnabled()) {
logger.trace("--deliveryCount = " + deliveryCount + " for " + this, new Exception("trace"));
}
}
@Override
public Queue getQueue() {
return subscription.getQueue();
}
@Override
public void handled() {
getQueue().referenceHandled();
}
@Override
public void setAlreadyAcked() {
alreadyAcked = true;
}
@Override
public boolean isAlreadyAcked() {
return alreadyAcked;
}
@Override
public void acknowledge() throws Exception {
subscription.ack(this);
}
@Override
public void acknowledge(Transaction tx) throws Exception {
acknowledge(tx, AckReason.NORMAL);
}
@Override
public void acknowledge(Transaction tx, AckReason reason) throws Exception {
if (tx == null) {
getQueue().acknowledge(this, reason);
} else {
getQueue().acknowledge(tx, this, reason);
}
}
/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
String msgToString;
try {
msgToString = getPagedMessage().toString();
} catch (Throwable e) {
// in case of an exception because of a missing page, we just want toString to return null
msgToString = "error:" + e.getMessage();
}
return "PagedReferenceImpl [position=" + position +
", message=" +
msgToString +
", deliveryTime=" +
deliveryTime +
", persistedCount=" +
persistedCount +
", deliveryCount=" +
deliveryCount +
", subscription=" +
subscription +
"]";
}
/* (non-Javadoc)
* @see org.apache.activemq.artemis.core.server.MessageReference#setConsumerId(java.lang.Long)
*/
@Override
public void setConsumerId(Long consumerID) {
this.consumerId = consumerID;
}
/* (non-Javadoc)
* @see org.apache.activemq.artemis.core.server.MessageReference#getConsumerId()
*/
@Override
public Long getConsumerId() {
return this.consumerId;
}
}