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The official Couchbase JVM Core IO Library
/*
* Copyright (c) 2014 Couchbase, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALING
* IN THE SOFTWARE.
*/
package com.couchbase.client.core.message.dcp;
import com.couchbase.client.core.annotations.InterfaceAudience;
import com.couchbase.client.core.annotations.InterfaceStability;
/**
* Failover log entry.
*
* It is used by the consumer to choose the point in stream to continue from.
*
* @author Sergey Avseyev
* @since 1.1.0
*/
@InterfaceStability.Experimental
@InterfaceAudience.Private
public class FailoverLogEntry {
/**
* A unique identifier that is generated that is assigned to each vBucket.
* This number is generated on an unclean shutdown or when a vBucket becomes active.
*/
private final long vbucketUUID;
/**
* Each mutation that occurs on a vBucket is assigned a number, which strictly
* increases as events are assigned sequence numbers, that can be used to order
* that event against other mutations within the same vBucket.
*/
private final long sequenceNumber;
public FailoverLogEntry(final long vbucketUUID, final long sequenceNumber) {
this.vbucketUUID = vbucketUUID;
this.sequenceNumber = sequenceNumber;
}
public long sequenceNumber() {
return sequenceNumber;
}
public long vbucketUUID() {
return vbucketUUID;
}
}