franta-hg@16: /**
franta-hg@16:  * SQL-DK
franta-hg@16:  * Copyright © 2013 František Kučera (frantovo.cz)
franta-hg@16:  *
franta-hg@16:  * This program is free software: you can redistribute it and/or modify
franta-hg@16:  * it under the terms of the GNU General Public License as published by
franta-hg@16:  * the Free Software Foundation, either version 3 of the License, or
franta-hg@16:  * (at your option) any later version.
franta-hg@16:  *
franta-hg@16:  * This program is distributed in the hope that it will be useful,
franta-hg@16:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
franta-hg@16:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
franta-hg@16:  * GNU General Public License for more details.
franta-hg@16:  *
franta-hg@16:  * You should have received a copy of the GNU General Public License
franta-hg@16:  * along with this program. If not, see <http://www.gnu.org/licenses/>.
franta-hg@16:  */
franta-hg@1: package info.globalcode.sql.dk;
franta-hg@1: 
franta-hg@26: import info.globalcode.sql.dk.configuration.ConfigurationProvider;
franta-hg@20: import info.globalcode.sql.dk.CLIOptions.MODE;
franta-hg@26: import info.globalcode.sql.dk.configuration.Configuration;
franta-hg@33: import info.globalcode.sql.dk.configuration.ConfigurationException;
franta-hg@34: import info.globalcode.sql.dk.configuration.DatabaseDefinition;
franta-hg@34: import info.globalcode.sql.dk.configuration.FormatterDefinition;
franta-hg@80: import info.globalcode.sql.dk.configuration.NameIdentified;
franta-hg@34: import info.globalcode.sql.dk.formatting.Formatter;
franta-hg@34: import info.globalcode.sql.dk.formatting.FormatterContext;
franta-hg@34: import info.globalcode.sql.dk.formatting.FormatterException;
franta-hg@80: import java.io.File;
franta-hg@80: import java.io.FileNotFoundException;
franta-hg@33: import java.io.IOException;
franta-hg@64: import java.io.PrintStream;
franta-hg@80: import java.io.PrintWriter;
franta-hg@34: import java.sql.SQLException;
franta-hg@80: import java.util.Collection;
franta-hg@13: import java.util.logging.Level;
franta-hg@63: import java.util.logging.LogRecord;
franta-hg@13: import java.util.logging.Logger;
franta-hg@33: import javax.xml.bind.JAXBContext;
franta-hg@33: import javax.xml.bind.Unmarshaller;
franta-hg@13: 
franta-hg@1: /**
franta-hg@1:  *
franta-hg@1:  * @author Ing. František Kučera (frantovo.cz)
franta-hg@1:  */
franta-hg@20: public class CLIStarter implements ConfigurationProvider {
franta-hg@1: 
franta-hg@96: 	// help:exit-codes
franta-hg@95: 	public static final int EXIT_SUCCESS = 0; // doc:success
franta-hg@95: 	public static final int EXIT_UNEXPECTED_ERROR = 1; // doc:unexpected error (probably bug)
franta-hg@95: 	public static final int EXIT_SQL_ERROR = 3; // doc:SQL error
franta-hg@95: 	public static final int EXIT_CLI_PARSE_ERROR = 4; // doc:CLI options parse error
franta-hg@95: 	public static final int EXIT_CLI_VALIDATE_ERROR = 5; // doc:CLI options validation error
franta-hg@95: 	public static final int EXIT_CONFIGURATION_ERROR = 6; // doc:configuration error
franta-hg@95: 	public static final int EXIT_FORMATTING_ERROR = 7; // doc:formatting error
franta-hg@13: 	private static final Logger log = Logger.getLogger(CLIStarter.class.getName());
franta-hg@20: 	private CLIOptions options;
franta-hg@20: 	private Configuration configuration;
franta-hg@13: 
franta-hg@1: 	public static void main(String[] args) {
franta-hg@55: 		log.log(Level.FINE, "Starting " + Constants.PROGRAM_NAME);
franta-hg@95: 		int exitCode;
franta-hg@63: 
franta-hg@21: 		if (args.length == 0) {
franta-hg@21: 			args = new String[]{CLIParser.Tokens.INFO_HELP};
franta-hg@21: 		}
franta-hg@21: 
franta-hg@13: 		try {
franta-hg@13: 			CLIParser parser = new CLIParser();
franta-hg@13: 			CLIOptions options = parser.parseOptions(args);
franta-hg@14: 			options.validate();
franta-hg@20: 			CLIStarter starter = new CLIStarter(options);
franta-hg@21: 			starter.installDefaultConfiguration();
franta-hg@20: 			starter.process();
franta-hg@55: 			log.log(Level.FINE, "All done");
franta-hg@56: 			exitCode = EXIT_SUCCESS;
franta-hg@13: 		} catch (CLIParserException e) {
franta-hg@14: 			log.log(Level.SEVERE, "Unable to parse CLI options", e);
franta-hg@95: 			exitCode = EXIT_CLI_PARSE_ERROR;
franta-hg@14: 		} catch (InvalidOptionsException e) {
franta-hg@14: 			log.log(Level.SEVERE, "Invalid CLI options", e);
franta-hg@48: 			for (InvalidOptionsException.OptionProblem p : e.getProblems()) {
franta-hg@63: 				LogRecord r = new LogRecord(Level.SEVERE, "Option problem: {0}");
franta-hg@63: 				r.setThrown(p.getException());
franta-hg@63: 				r.setParameters(new Object[]{p.getDescription()});
franta-hg@63: 				log.log(r);
franta-hg@48: 			}
franta-hg@95: 			exitCode = EXIT_CLI_VALIDATE_ERROR;
franta-hg@34: 		} catch (ConfigurationException e) {
franta-hg@34: 			log.log(Level.SEVERE, "Configuration problem", e);
franta-hg@95: 			exitCode = EXIT_CONFIGURATION_ERROR;
franta-hg@34: 		} catch (SQLException e) {
franta-hg@34: 			log.log(Level.SEVERE, "SQL problem", e);
franta-hg@56: 			exitCode = EXIT_SQL_ERROR;
franta-hg@34: 		} catch (FormatterException e) {
franta-hg@34: 			log.log(Level.SEVERE, "Formatting problem", e);
franta-hg@95: 			exitCode = EXIT_FORMATTING_ERROR;
franta-hg@13: 		}
franta-hg@56: 
franta-hg@56: 		System.exit(exitCode);
franta-hg@4: 	}
franta-hg@20: 
franta-hg@20: 	public CLIStarter(CLIOptions options) {
franta-hg@20: 		this.options = options;
franta-hg@20: 	}
franta-hg@20: 
franta-hg@34: 	private void process() throws ConfigurationException, SQLException, FormatterException {
franta-hg@64: 		MODE mode = options.getMode();
franta-hg@64: 
franta-hg@20: 		/** Show info */
franta-hg@20: 		if (!options.getShowInfo().isEmpty()) {
franta-hg@64: 			PrintStream infoOut = mode == MODE.JUST_SHOW_INFO ? System.out : System.err;
franta-hg@69: 			InfoLister infoLister = new InfoLister(infoOut, this, options);
franta-hg@70: 			infoLister.showInfo();
franta-hg@20: 		}
franta-hg@20: 
franta-hg@20: 		switch (mode) {
franta-hg@20: 			case QUERY_NOW:
franta-hg@34: 				processQueryNow();
franta-hg@20: 				break;
franta-hg@20: 			case PREPARE_BATCH:
franta-hg@34: 				processPrepareBatch();
franta-hg@20: 				break;
franta-hg@20: 			case EXECUTE_BATCH:
franta-hg@34: 				processExecuteBatch();
franta-hg@20: 				break;
franta-hg@20: 			case JUST_SHOW_INFO:
franta-hg@20: 				// already done above
franta-hg@20: 				break;
franta-hg@20: 			default:
franta-hg@20: 				log.log(Level.SEVERE, "Unsupported mode: {0}", mode);
franta-hg@20: 				break;
franta-hg@20: 		}
franta-hg@80: 
franta-hg@80: 		generateBashCompletion();
franta-hg@20: 	}
franta-hg@20: 
franta-hg@34: 	private void processQueryNow() throws ConfigurationException, SQLException, FormatterException {
franta-hg@34: 		DatabaseDefinition dd = getConfiguration().getDatabase(options.getDatabaseName());
franta-hg@75: 		FormatterDefinition fd = configuration.getFormatter(options.getFormatterName());
franta-hg@75: 		try (DatabaseConnection c = dd.connect()) {
franta-hg@75: 			log.log(Level.FINE, "Database connected");
franta-hg@104: 			try (Formatter f = fd.getInstance(new FormatterContext(options.getOutputStream(), options.getFormatterProperties()))) {
franta-hg@101: 				c.executeQuery(options.getSQLCommand(), f);
franta-hg@101: 			}
franta-hg@34: 		}
franta-hg@34: 	}
franta-hg@34: 
franta-hg@34: 	private void processPrepareBatch() {
franta-hg@34: 	}
franta-hg@34: 
franta-hg@34: 	private void processExecuteBatch() {
franta-hg@34: 	}
franta-hg@34: 
franta-hg@20: 	@Override
franta-hg@33: 	public Configuration getConfiguration() throws ConfigurationException {
franta-hg@20: 		if (configuration == null) {
franta-hg@20: 			configuration = loadConfiguration();
franta-hg@20: 		}
franta-hg@20: 		return configuration;
franta-hg@20: 	}
franta-hg@20: 
franta-hg@34: 	private void installDefaultConfiguration() throws ConfigurationException {
franta-hg@33: 		Constants.DIR.mkdir();
franta-hg@33: 
franta-hg@33: 		if (Constants.CONFIG_FILE.exists()) {
franta-hg@55: 			log.log(Level.FINER, "Config file already exists: {0}", Constants.CONFIG_FILE);
franta-hg@33: 		} else {
franta-hg@33: 			try {
franta-hg@33: 				Functions.installResource(Constants.EXAMPLE_CONFIG_FILE, Constants.CONFIG_FILE);
franta-hg@55: 				log.log(Level.FINE, "Installing default config file: {0}", Constants.CONFIG_FILE);
franta-hg@33: 			} catch (IOException e) {
franta-hg@34: 				throw new ConfigurationException("Unable to write example configuration to " + Constants.CONFIG_FILE, e);
franta-hg@33: 			}
franta-hg@33: 		}
franta-hg@20: 	}
franta-hg@20: 
franta-hg@33: 	private Configuration loadConfiguration() throws ConfigurationException {
franta-hg@33: 		try {
franta-hg@33: 			JAXBContext jaxb = JAXBContext.newInstance(Configuration.class);
franta-hg@33: 			Unmarshaller u = jaxb.createUnmarshaller();
franta-hg@33: 			return (Configuration) u.unmarshal(Constants.CONFIG_FILE);
franta-hg@33: 		} catch (Exception e) {
franta-hg@33: 			throw new ConfigurationException("Unable to load configuration from " + Constants.CONFIG_FILE, e);
franta-hg@33: 		}
franta-hg@20: 	}
franta-hg@80: 
franta-hg@80: 	private void generateBashCompletion() {
franta-hg@80: 		if (configuration == null) {
franta-hg@80: 			log.log(Level.FINER, "Not writing Bash completion helper files. In order to generate these files please run some command which requires configuration.");
franta-hg@80: 		} else {
franta-hg@80: 			try {
franta-hg@80: 				File dir = new File(Constants.DIR, "bash-completion");
franta-hg@80: 				dir.mkdir();
franta-hg@80: 				writeBashCompletionHelperFile(configuration.getDatabases(), new File(dir, "databases"));
franta-hg@80: 				writeBashCompletionHelperFile(configuration.getAllFormatters(), new File(dir, "formatters"));
franta-hg@80: 			} catch (Exception e) {
franta-hg@80: 				log.log(Level.WARNING, "Unable to generate Bash completion helper files", e);
franta-hg@80: 			}
franta-hg@80: 		}
franta-hg@80: 	}
franta-hg@80: 
franta-hg@80: 	private void writeBashCompletionHelperFile(Collection<? extends NameIdentified> items, File target) throws FileNotFoundException {
franta-hg@80: 		if (Constants.CONFIG_FILE.lastModified() > target.lastModified()) {
franta-hg@80: 			try (PrintWriter fw = new PrintWriter(target)) {
franta-hg@80: 				for (NameIdentified dd : items) {
franta-hg@80: 					fw.println(dd.getName());
franta-hg@80: 				}
franta-hg@80: 				fw.close();
franta-hg@80: 				log.log(Level.FINE, "Bash completion helper file was written: {0}", target);
franta-hg@80: 			}
franta-hg@80: 		} else {
franta-hg@80: 			log.log(Level.FINER, "Not writing Bash completion helper file: {0} because configuration {1} has not been changed", new Object[]{target, Constants.CONFIG_FILE});
franta-hg@80: 		}
franta-hg@80: 	}
franta-hg@1: }