/*
* 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.jetspeed.cluster;
/**
* Node Manager Interface
*
* @author <a href="mailto:hajo@bluesunrise.com">Hajo Birthelmer</a>
* @version
*/
public interface NodeManager
{
public static final int INVALID_NODE_REQUEST = -1;
public static final int NODE_SAVED = 0;
public static final int NODE_OUTDATED = 1;
public static final int NODE_NEW = 2;
/**
* Returns the current "knowledge" about a given node (i.e. the portlet application).
* If the contextName doesn't exist NODE_NEW is returned.
* An id requested newer than what is stored is indicated by NODE_OUTDATED.
* @param id
* @param contextName
* @return
*/
public int checkNode(Long id, String contextName);
/**
* Add a new node or update the id of an existing one...(i.e. the portlet application) to the local info
* @param id
* @param contextName
* @throws Exception
*/
public void addNode(Long id, String contextName) throws Exception;
/**
* return the number of currently stored nodes
* @return
*/
public int getNumberOfNodes();
/**
* Remove a node
* @param id
* @param contextName
* @throws Exception
*/
public void removeNode(String contextName) throws Exception;
}
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