liquibase.diff.DiffResult Java Examples

@Override
protected void run(Bootstrap<T> bootstrap, Namespace namespace, T configuration) throws Exception {
    // The existing database with migrations managed by Liquibase.
    DataSourceFactory outdatedDb = configuration.getDatabaseConfig();

    try (CloseableLiquibase outdatedLiquibase = createLiquibase(outdatedDb)) {
        // A temporary database that starts out empty and then gets the autogenerated Ebean table definitions applied.
        DataSourceFactory freshDb = EbeanConfigUtils.clone(outdatedDb);
        String url = outdatedDb.getUrl();
        freshDb.setUrl(url.substring(0, url.lastIndexOf("/")) + "/migrationdiff");

        // Creating the Ebean server makes it apply its table definitions to the database immediately.
        ServerConfig serverConfig = EbeanConfigUtils.createServerConfig(freshDb);
        serverConfig.setDdlGenerate(true);
        serverConfig.setDdlRun(true);
        EbeanServer ebeanServer = EbeanServerFactory.create(serverConfig);

        try (CloseableLiquibase freshLiquibase = createLiquibase(freshDb)) {
            // Create and print the differences between the two databases, i.e. a migration that should be applied to update to the newest Ebean definitions.
            DiffResult diff = outdatedLiquibase.diff(freshLiquibase.getDatabase(), outdatedLiquibase.getDatabase(), CompareControl.STANDARD);
            DiffToChangeLog diffToChangeLog = new DiffToChangeLog(diff, new DiffOutputControl(false, false, true));
            diffToChangeLog.print(System.out);
        }
    }
}
 

@Override
public void process(File generatedFile, File outputDirectory, SchemaGenConfig config) {
	try (Connection connection = setupDataSource(generatedFile); Connection emptyConnection = setupEmptySource()) {
		DatabaseFactory databaseFactory = DatabaseFactory.getInstance();
		Database database = databaseFactory.findCorrectDatabaseImplementation(new JdbcConnection(connection));
		Database emptyDatabase = databaseFactory.findCorrectDatabaseImplementation(new JdbcConnection(emptyConnection));

		DiffGeneratorFactory diffGeneratorFactory = DiffGeneratorFactory.getInstance();

		CompareControl compareControl = new CompareControl();
		DiffResult result = diffGeneratorFactory.compare(database, emptyDatabase, compareControl);

		DiffOutputControl outputControl = new DiffOutputControl();
		DiffToChangeLog changeLog = new DiffToChangeLog(result, outputControl);
		changeLog.setChangeSetAuthor(config.getLiquibase().getUser());
		changeLog.setIdRoot(config.getVersion());
		changeLog.generateChangeSets();

		File outputFile = new File(outputDirectory,
				config.getPackageName().replace(".", File.separator) + File.separator + config.getLiquibase().getFileName());
		outputFile.getParentFile().mkdirs();
		if (outputFile.exists()) {
			boolean deleted = outputFile.delete();
			if (!deleted) {
				throw new IllegalStateException("cannot delete " + outputFile.getAbsolutePath());
			}
		}
		changeLog.print(outputFile.getAbsolutePath(), new XMLChangeLogSerializer());

		if (config.getConstraintNamePrefix() != null) {
			String sql = FileUtils.readAsString(outputFile);
			sql = sql.replace("primaryKeyName=\"CONSTRAINT_", "primaryKeyName=\"" + config.getConstraintNamePrefix() + "CONSTRAINT_");
			FileUtils.writeString(sql, outputFile);
		}
	} catch (Exception e) {
		throw new IllegalStateException(e);
	}
}
 

@Override
public void dropDatabaseObjects(final CatalogAndSchema schemaToDrop) throws LiquibaseException {
    ObjectQuotingStrategy currentStrategy = this.getObjectQuotingStrategy();
    this.setObjectQuotingStrategy(ObjectQuotingStrategy.QUOTE_ALL_OBJECTS);
    try {
        DatabaseSnapshot snapshot;
        try {
            final SnapshotControl snapshotControl = new SnapshotControl(this);
            final Set<Class<? extends DatabaseObject>> typesToInclude = snapshotControl.getTypesToInclude();

            //We do not need to remove indexes and primary/unique keys explicitly. They should be removed
            //as part of tables.
            typesToInclude.remove(Index.class);
            typesToInclude.remove(PrimaryKey.class);
            typesToInclude.remove(UniqueConstraint.class);

            if (supportsForeignKeyDisable()) {
                //We do not remove ForeignKey because they will be disabled and removed as parts of tables.
                typesToInclude.remove(ForeignKey.class);
            }

            final long createSnapshotStarted = System.currentTimeMillis();
            snapshot = SnapshotGeneratorFactory.getInstance().createSnapshot(schemaToDrop, this, snapshotControl);
            LogService.getLog(getClass()).debug(LogType.LOG, String.format("Database snapshot generated in %d ms. Snapshot includes: %s", System.currentTimeMillis() - createSnapshotStarted, typesToInclude));
        } catch (LiquibaseException e) {
            throw new UnexpectedLiquibaseException(e);
        }

        final long changeSetStarted = System.currentTimeMillis();
        CompareControl compareControl = new CompareControl(
            new CompareControl.SchemaComparison[]{
                new CompareControl.SchemaComparison(
                    CatalogAndSchema.DEFAULT,
                    schemaToDrop)},
            snapshot.getSnapshotControl().getTypesToInclude());
        DiffResult diffResult = DiffGeneratorFactory.getInstance().compare(
            new EmptyDatabaseSnapshot(this),
            snapshot,
            compareControl);

        List<ChangeSet> changeSets = new DiffToChangeLog(diffResult, new DiffOutputControl(true, true, false, null).addIncludedSchema(schemaToDrop)).generateChangeSets();
        LogService.getLog(getClass()).debug(LogType.LOG, String.format("ChangeSet to Remove Database Objects generated in %d ms.", System.currentTimeMillis() - changeSetStarted));

        boolean previousAutoCommit = this.getAutoCommitMode();
        this.commit(); //clear out currently executed statements
        this.setAutoCommit(false); //some DDL doesn't work in autocommit mode
        final boolean reEnableFK = supportsForeignKeyDisable() && disableForeignKeyChecks();
        try {
            for (ChangeSet changeSet : changeSets) {
                changeSet.setFailOnError(false);
                for (Change change : changeSet.getChanges()) {
                    if (change instanceof DropTableChange) {
                        ((DropTableChange) change).setCascadeConstraints(true);
                    }
                    SqlStatement[] sqlStatements = change.generateStatements(this);
                    for (SqlStatement statement : sqlStatements) {
                        ExecutorService.getInstance().getExecutor(this).execute(statement);
                    }

                }
                this.commit();
            }
        } finally {
            if (reEnableFK) {
                enableForeignKeyChecks();
            }
        }

        ChangeLogHistoryServiceFactory.getInstance().getChangeLogService(this).destroy();
        LockServiceFactory.getInstance().getLockService(this).destroy();

        this.setAutoCommit(previousAutoCommit);
        LogService.getLog(getClass()).info(LogType.LOG, String.format("Successfully deleted all supported object types in schema %s.", schemaToDrop.toString()));
    } finally {
        this.setObjectQuotingStrategy(currentStrategy);
        this.commit();
    }
}