52 lines
1.9 KiB
Java
52 lines
1.9 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.catalina;
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import java.util.Set;
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/**
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* Interface implemented by session managers that do not keep a complete copy
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* of all sessions in memory but do know where every session is. The
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* BackupManager is an example of such a Manager as are implementations of the
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* StoreManager interface.
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* <p>
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* With the BackupManager, sessions can be primary (master copy on this node),
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* backup (backup copy on this node) or proxy (only the session ID on this
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* node). The identity of the primary and backup nodes are known for all
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* sessions, including proxy sessions.
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* <p>
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* With StoreManager implementations, sessions can be primary (session is in
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* memory) or proxy (session is in the Store).
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*/
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public interface DistributedManager {
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/**
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* Returns the total session count for primary, backup and proxy.
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*
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* @return The total session count across the cluster.
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*/
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public int getActiveSessionsFull();
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/**
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* Returns the list of all sessions IDS (primary, backup and proxy).
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*
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* @return The complete set of sessions IDs across the cluster.
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*/
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public Set<String> getSessionIdsFull();
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}
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