/*
* 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.catalina.tribes;
import java.util.Properties;
public interface MembershipProvider {
/**
* Initialize the membership provider with the specified configuration.
*
* @param properties configuration
*
* @throws Exception if an error occurs
*/
void init(Properties properties) throws Exception;
/**
* Start the membership provider.
*
* @param level the readiness level
* <ul>
* <li>Channel.DEFAULT - will start all services</li>
* <li>Channel.MBR_RX_SEQ - starts the membership receiver</li>
* <li>Channel.MBR_TX_SEQ - starts the membership broadcaster</li>
* </ul>
*
* @throws Exception if an error occurs
*/
void start(int level) throws Exception;
/**
* Stop the membership provider.
*
* @param level the readiness level
* <ul>
* <li>Channel.DEFAULT - will stop all services</li>
* <li>Channel.MBR_RX_SEQ - stops the membership receiver</li>
* <li>Channel.MBR_TX_SEQ - stops the membership broadcaster</li>
* </ul>
*
* @return {@code true} if successful
*
* @throws Exception if an error occurs
*/
boolean stop(int level) throws Exception;
/**
* Set the associated membership listener.
*
* @param listener the listener
*/
void setMembershipListener(MembershipListener listener);
/**
* Set the associated membership service.
*
* @param service the service
*/
void setMembershipService(MembershipService service);
/**
* @return {@code true} if there are members
*/
boolean hasMembers();
/**
* Get the specified member from the associated membership.
*
* @param mbr the member
*
* @return the member
*/
Member getMember(Member mbr);
/**
* Get the members from the associated membership.
*
* @return the members
*/
Member[] getMembers();
}