/*
* 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 org.apache.activemq.artemis.core.paging.PagedMessage;
import org.apache.activemq.artemis.core.paging.cursor.PageCache;
import org.apache.activemq.artemis.core.paging.impl.Page;
/**
* The caching associated to a single page.
*/
class PageCacheImpl implements PageCache {
// Constants -----------------------------------------------------
// Attributes ----------------------------------------------------
private PagedMessage[] messages;
private final Page page;
// Static --------------------------------------------------------
// Constructors --------------------------------------------------
PageCacheImpl(final Page page) {
this.page = page;
}
// Public --------------------------------------------------------
@Override
public PagedMessage getMessage(final int messageNumber) {
if (messageNumber < messages.length) {
return messages[messageNumber];
} else {
return null;
}
}
@Override
public long getPageId() {
return page.getPageId();
}
@Override
public void setMessages(final PagedMessage[] messages) {
this.messages = messages;
}
@Override
public int getNumberOfMessages() {
return messages.length;
}
@Override
public void close() {
}
@Override
public boolean isLive() {
return false;
}
@Override
public String toString() {
return "PageCacheImpl::page=" + page.getPageId() + " numberOfMessages = " + messages.length;
}
@Override
public PagedMessage[] getMessages() {
return messages;
}
}