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io.cdap.plugin.db.source.ConnectionWithFetchSize Maven / Gradle / Ivy
/*
* Copyright © 2021 Cask Data, 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 io.cdap.plugin.db.source;
import io.cdap.plugin.db.ForwardingConnection;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;
/**
* A JDBC {@link Connection} that delegates all methods to another {@link Connection}, but automatically call
* the {@link Statement#setFetchSize(int)} for all {@link Statement} created via this class.
*/
public class ConnectionWithFetchSize extends ForwardingConnection {
private final int fetchSize;
public ConnectionWithFetchSize(Connection delegate, int fetchSize) {
super(delegate);
this.fetchSize = fetchSize;
}
private T setFetchSize(T stmt) throws SQLException {
stmt.setFetchSize(fetchSize);
return stmt;
}
@Override
public Statement createStatement() throws SQLException {
return setFetchSize(super.createStatement());
}
@Override
public PreparedStatement prepareStatement(String sql) throws SQLException {
return setFetchSize(super.prepareStatement(sql));
}
@Override
public CallableStatement prepareCall(String sql) throws SQLException {
return setFetchSize(super.prepareCall(sql));
}
@Override
public Statement createStatement(int resultSetType, int resultSetConcurrency) throws SQLException {
return setFetchSize(super.createStatement(resultSetType, resultSetConcurrency));
}
@Override
public PreparedStatement prepareStatement(String sql,
int resultSetType, int resultSetConcurrency) throws SQLException {
return setFetchSize(super.prepareStatement(sql, resultSetType, resultSetConcurrency));
}
@Override
public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
return setFetchSize(super.prepareCall(sql, resultSetType, resultSetConcurrency));
}
@Override
public Statement createStatement(int resultSetType,
int resultSetConcurrency, int resultSetHoldability) throws SQLException {
return setFetchSize(super.createStatement(resultSetType, resultSetConcurrency, resultSetHoldability));
}
@Override
public PreparedStatement prepareStatement(String sql, int resultSetType,
int resultSetConcurrency, int resultSetHoldability) throws SQLException {
return setFetchSize(super.prepareStatement(sql, resultSetType, resultSetConcurrency, resultSetHoldability));
}
@Override
public CallableStatement prepareCall(String sql, int resultSetType,
int resultSetConcurrency, int resultSetHoldability) throws SQLException {
return setFetchSize(super.prepareCall(sql, resultSetType, resultSetConcurrency, resultSetHoldability));
}
@Override
public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException {
return setFetchSize(super.prepareStatement(sql, autoGeneratedKeys));
}
@Override
public PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException {
return setFetchSize(super.prepareStatement(sql, columnIndexes));
}
@Override
public PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException {
return setFetchSize(super.prepareStatement(sql, columnNames));
}
}