com.datastax.oss.driver.internal.core.metadata.schema.queries.SchemaQueries Maven / Gradle / Ivy
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/*
* 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 com.datastax.oss.driver.internal.core.metadata.schema.queries;
import java.util.concurrent.CompletionStage;
/**
* Manages the queries to system tables during a schema refresh.
*
* They are all asynchronous, and possibly paged. This class abstracts all the details and
* exposes a common result type.
*
*
Implementations must be thread-safe.
*/
public interface SchemaQueries {
/**
* Launch the queries asynchronously, returning a future that will complete when they have all
* succeeded.
*/
CompletionStage execute();
}