io.atomix.copycat.server.session.Sessions Maven / Gradle / Ivy
/*
* Copyright 2015 the original author or authors.
*
* Licensed 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 io.atomix.copycat.server.session;
import io.atomix.copycat.client.session.Session;
/**
* Provides a set of active server sessions.
*
* Server state machines can use the {@code Sessions} object to access the list of sessions currently open to the
* state machine. Session sets are guaranteed to be deterministic. All state machines will see the same set of
* open sessions at the same point in the log except in cases where a session has already been closed and removed.
* If a session has already been closed on another server, the session is guaranteed to have been expired on all
* servers and thus operations like {@link Session#publish(String, Object)} are effectively no-ops.
*
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