Quelle DistributedManager.java

Sprache: JAVA

/*
* 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;

import java.util.Set;

/**
* Interface implemented by session managers that do not keep a complete copy
* of all sessions in memory but do know where every session is. The
* BackupManager is an example of such a Manager as are implementations of the
* StoreManager interface.
* <p>
* With the BackupManager, sessions can be primary (primary copy on this node),
* backup (backup copy on this node) or proxy (only the session ID on this
* node). The identity of the primary and backup nodes are known for all
* sessions, including proxy sessions.
* <p>
* With StoreManager implementations, sessions can be primary (session is in
* memory) or proxy (session is in the Store).
*/
public interface DistributedManager {

    /**
     * Returns the total session count for primary, backup and proxy.
     *
     * @return  The total session count across the cluster.
     */
    int getActiveSessionsFull();

    /**
     * Returns the list of all sessions IDS (primary, backup and proxy).
     *
     * @return  The complete set of sessions IDs across the cluster.
     */
    Set<String> getSessionIdsFull();
}

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