/*
* 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.impl;
import java.util.LinkedList;
import java.util.List;
import org.apache.activemq.artemis.core.paging.PagedMessage;
import org.apache.activemq.artemis.core.paging.cursor.LivePageCache;
import org.apache.activemq.artemis.core.paging.impl.Page;
import org.apache.activemq.artemis.core.server.LargeServerMessage;
import org.jboss.logging.Logger;
/**
* This is the same as PageCache, however this is for the page that's being currently written.
*/
public class LivePageCacheImpl implements LivePageCache {
private static final Logger logger = Logger.getLogger(LivePageCacheImpl.class);
private final List<PagedMessage> messages = new LinkedList<>();
private final Page page;
private boolean isLive = true;
public LivePageCacheImpl(final Page page) {
this.page = page;
}
@Override
public long getPageId() {
return page.getPageId();
}
@Override
public synchronized int getNumberOfMessages() {
return messages.size();
}
@Override
public synchronized void setMessages(PagedMessage[] messages) {
// This method shouldn't be called on liveCache, but we will provide the implementation for it anyway
for (PagedMessage msg : messages) {
addLiveMessage(msg);
}
}
@Override
public synchronized PagedMessage getMessage(int messageNumber) {
if (messageNumber < messages.size()) {
return messages.get(messageNumber);
} else {
return null;
}
}
@Override
public synchronized boolean isLive() {
return isLive;
}
@Override
public synchronized void addLiveMessage(PagedMessage message) {
if (message.getMessage().isLargeMessage()) {
((LargeServerMessage) message.getMessage()).incrementDelayDeletionCount();
}
this.messages.add(message);
}
@Override
public synchronized void close() {
logger.tracef("Closing %s", this);
this.isLive = false;
}
@Override
public synchronized PagedMessage[] getMessages() {
return messages.toArray(new PagedMessage[messages.size()]);
}
@Override
public String toString() {
return "LivePacheCacheImpl::page=" + page.getPageId() + " number of messages=" + messages.size() + " isLive = " +
isLive;
}
}