org.apache.catalina.tribes.MembershipService Maven / Gradle / Ivy
/*
* 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;
/**
* MembershipService Interface
* The MembershipService interface is the membership component
* at the bottom layer, the IO layer (for layers see the javadoc for the {@link Channel} interface).
*/
public interface MembershipService {
int MBR_RX = Channel.MBR_RX_SEQ;
int MBR_TX = Channel.MBR_TX_SEQ;
/**
* Sets the properties for the membership service. This must be called before
* the start() method is called.
* The properties are implementation specific.
* @param properties - to be used to configure the membership service.
*/
void setProperties(java.util.Properties properties);
/**
* @return the properties for the configuration used.
*/
java.util.Properties getProperties();
/**
* Starts the membership service. If a membership listeners is added
* the listener will start to receive membership events.
* Performs a start level 1 and 2
* @throws Exception if the service fails to start.
*/
void start() throws Exception;
/**
* Starts the membership service. If a membership listeners is added
* the listener will start to receive membership events.
* @param level - level MBR_RX starts listening for members, level MBR_TX
* starts broad casting the server
* @throws Exception if the service fails to start.
* @throws java.lang.IllegalArgumentException if the level is incorrect.
*/
void start(int level) throws Exception;
/**
* Stops the membership service. If a membership listeners is added
* the listener will start to receive membership events.
* @param level - level MBR_RX stops listening for members, level MBR_TX
* stops broad casting the server
* @throws java.lang.IllegalArgumentException if the level is incorrect.
*/
void stop(int level);
/**
* @return true if the the group contains members
*/
boolean hasMembers();
/**
* Retrieve the specified member from the membership.
* @param mbr The member to retrieve
* @return the member
*/
Member getMember(Member mbr);
/**
* @return a list of all the members in the cluster.
*/
Member[] getMembers();
/**
* Get the local member.
* @return the member object that defines this member
* @param incAliveTime true to set the alive time
* on the local member
*/
Member getLocalMember(boolean incAliveTime);
/**
* @return all members by name
*/
String[] getMembersByName();
/**
* Get a member.
* @param name The member name
* @return the member
*/
Member findMemberByName(String name);
/**
* Sets the local member properties for broadcasting.
*
* @param listenHost Listen to host
* @param listenPort Listen to port
* @param securePort Use a secure port
* @param udpPort Use UDP
*/
void setLocalMemberProperties(String listenHost, int listenPort, int securePort, int udpPort);
/**
* Sets the membership listener, only one listener can be added.
* If you call this method twice, the last listener will be used.
* @param listener The listener
*/
void setMembershipListener(MembershipListener listener);
/**
* Removes the membership listener.
*/
void removeMembershipListener();
/**
* Set a payload to be broadcasted with each membership
* broadcast.
* @param payload byte[]
*/
void setPayload(byte[] payload);
/**
* Set the associated domain.
* @param domain the domain
*/
void setDomain(byte[] domain);
/**
* Broadcasts a message to all members.
* @param message The message to broadcast
* @throws ChannelException Message broadcast failed
*/
void broadcast(ChannelMessage message) throws ChannelException;
/**
* Return the channel that is related to this MembershipService
* @return Channel
*/
Channel getChannel();
/**
* Set the channel that is related to this MembershipService
* @param channel The channel
*/
void setChannel(Channel channel);
/**
* Get the MembershipProvider
* @return MembershipProvider
*/
MembershipProvider getMembershipProvider();
}