io.pivotal.spring.xd.jdbcgpfdist.support.DefaultLoadService.java Source code

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Here is the source code for io.pivotal.spring.xd.jdbcgpfdist.support.DefaultLoadService.java

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/*
 * Copyright 2015 the original author or authors.
 *
 * 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.pivotal.spring.xd.jdbcgpfdist.support;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.util.Assert;

import java.util.UUID;

public class DefaultLoadService implements LoadService {

    private final Log log = LogFactory.getLog(DefaultLoadService.class);

    private final JdbcTemplate jdbcTemplate;

    public DefaultLoadService(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
        Assert.notNull(jdbcTemplate, "JdbcTemplate must be set");
    }

    @Override
    public void load(LoadConfiguration loadConfiguration) {
        load(loadConfiguration, null);
    }

    @Override
    public void load(LoadConfiguration loadConfiguration, RuntimeContext context) {
        String prefix = UUID.randomUUID().toString().replaceAll("-", "_");

        // setup jdbc operations
        JdbcCommands operations = new JdbcCommands(jdbcTemplate);

        String sqlCreateTable = SqlUtils.createExternalReadableTable(loadConfiguration, prefix,
                context != null ? context.getLocations() : null);
        String sqlDropTable = SqlUtils.dropExternalReadableTable(loadConfiguration, prefix);
        String sqlInsert = SqlUtils.load(loadConfiguration, prefix);

        operations.setPrepareSql(sqlCreateTable);
        operations.setCleanSql(sqlDropTable);
        operations.setRunSql(sqlInsert);

        operations.setBeforeSqls(loadConfiguration.getSqlBefore());
        operations.setAfterSqls(loadConfiguration.getSqlAfter());

        if (!operations.execute() && operations.getLastException() != null) {
            throw operations.getLastException();
        }
    }

    @Override
    public void unload(LoadConfiguration loadConfiguration, RuntimeContext context) {

    }

}