com.couchbase.client.java.analytics.AnalyticsScanConsistency Maven / Gradle / Ivy
Show all versions of java-client Show documentation
/*
* Copyright (c) 2019 Couchbase, Inc.
*
* 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 com.couchbase.client.java.analytics;
/**
* The possible values for scan consistency in an analytics request.
*
* @since 3.0.0
*/
public enum AnalyticsScanConsistency {
/**
* The index will return whatever state it has to the analytics query engine at the time of query.
*
* This is the default (for single-statement requests). No timestamp vector is used in the index scan. This is also
* the fastest mode, because we avoid the cost of obtaining the vector, and we also avoid any wait for the index
* to catch up to the vector.
*/
NOT_BOUNDED {
@Override
public String toString() {
return "not_bounded";
}
},
/**
* The index will wait until all mutations have been processed at the time of request before being processed in the
* analytics query engine.
*
* This implements strong consistency per request. Before processing the request, a current vector is obtained.
* The vector is used as a lower bound for the statements in the request.
*/
REQUEST_PLUS {
@Override
public String toString() {
return "request_plus";
}
}
}