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ResultSetForPartitionFunction.java
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ResultSetForPartitionFunction.java
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/*
* Copyright (c) 2008-2018, Hazelcast, Inc. All Rights Reserved.
*
* 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.hazelcast.jet.pipeline;
import java.io.Serializable;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
/**
* Represents a function that accepts a JDBC connection to the database,
* the total parallelism and processor index as arguments and produces a
* result set. This result set should return a part of the whole result
* set specific to this processor.
*/
@FunctionalInterface
public interface ResultSetForPartitionFunction extends Serializable {
/**
* Creates a result set which returns a part of the rows pertaining to the
* given processor.
*
* @param connection the JDBC connection
* @param parallelism the total parallelism for the processor
* @param index the global processor index
*/
ResultSet createResultSet(Connection connection, int parallelism, int index) throws SQLException;
}