org.springframework.boot.autoconfigure.jdbc.DataSourceInitialization.java Source code

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Here is the source code for org.springframework.boot.autoconfigure.jdbc.DataSourceInitialization.java

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/*
 * Copyright 2012-2013 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 org.springframework.boot.autoconfigure.jdbc;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import javax.annotation.PostConstruct;
import javax.sql.DataSource;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.core.io.Resource;
import org.springframework.jdbc.datasource.init.DatabasePopulatorUtils;
import org.springframework.jdbc.datasource.init.ResourceDatabasePopulator;
import org.springframework.util.StringUtils;

/**
 * @author Dave Syer
 */
@Configuration
@EnableConfigurationProperties(DataSourceProperties.class)
public class DataSourceInitialization implements ApplicationListener<ContextRefreshedEvent> {

    private static Log logger = LogFactory.getLog(DataSourceAutoConfiguration.class);

    @Autowired(required = false)
    private DataSource dataSource;

    @Autowired
    private ApplicationContext applicationContext;

    @Autowired
    private DataSourceProperties properties;

    private boolean initialized = false;

    @Bean
    public ApplicationListener<DataSourceInitializedEvent> dataSourceInitializedListener() {
        return new DataSourceInitializedListener();
    }

    @Override
    public void onApplicationEvent(ContextRefreshedEvent event) {
        if (this.properties.isDeferDdl()) {
            boolean initialize = this.properties.isInitialize();
            if (!initialize) {
                logger.debug("Initialization disabled (not running DDL scripts)");
                return;
            }
            runSchemaScripts();
        }
    }

    @PostConstruct
    protected void initialize() {
        if (!this.properties.isDeferDdl()) {
            boolean initialize = this.properties.isInitialize();
            if (!initialize) {
                logger.debug("Initialization disabled (not running DDL scripts)");
                return;
            }
            runSchemaScripts();
        }
    }

    private void runSchemaScripts() {
        String schema = this.properties.getSchema();
        if (schema == null) {
            String platform = this.properties.getPlatform();
            schema = "classpath*:schema-" + platform + ".sql,";
            schema += "classpath*:schema.sql";
        }
        if (runScripts(schema)) {
            this.applicationContext.publishEvent(new DataSourceInitializedEvent(this.dataSource));
        }
    }

    private void runDataScripts() {
        if (this.initialized) {
            return;
        }
        String schema = this.properties.getData();
        if (schema == null) {
            String platform = this.properties.getPlatform();
            schema = "classpath*:data-" + platform + ".sql,";
            schema += "classpath*:data.sql";
        }
        runScripts(schema);
        this.initialized = true;
    }

    private boolean runScripts(String scripts) {

        if (this.dataSource == null) {
            logger.debug("No DataSource found so not initializing");
            return false;
        }

        List<Resource> resources = getSchemaResources(scripts);

        boolean continueOnError = this.properties.isContinueOnError();
        boolean exists = false;
        ResourceDatabasePopulator populator = new ResourceDatabasePopulator();
        for (Resource resource : resources) {
            if (resource.exists()) {
                exists = true;
                populator.addScript(resource);
                populator.setContinueOnError(continueOnError);
            }
        }
        populator.setSeparator(this.properties.getSeparator());

        if (exists) {
            DatabasePopulatorUtils.execute(populator, this.dataSource);
        }

        return exists;

    }

    private List<Resource> getSchemaResources(String schema) {
        List<Resource> resources = new ArrayList<Resource>();
        for (String schemaLocation : StringUtils.commaDelimitedListToStringArray(schema)) {
            try {
                resources.addAll(Arrays.asList(this.applicationContext.getResources(schemaLocation)));
            } catch (IOException ex) {
                throw new IllegalStateException("Unable to load resource from " + schemaLocation, ex);
            }
        }
        return resources;
    }

    @SuppressWarnings("serial")
    public static class DataSourceInitializedEvent extends ApplicationEvent {

        public DataSourceInitializedEvent(DataSource source) {
            super(source);
        }

    }

    private class DataSourceInitializedListener implements ApplicationListener<DataSourceInitializedEvent> {

        @Override
        public void onApplicationEvent(DataSourceInitializedEvent event) {
            runDataScripts();
        }

    }

}