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Liquibase is a tool for managing and executing database changes.
package liquibase.database.core;
import liquibase.CatalogAndSchema;
import liquibase.Scope;
import liquibase.database.AbstractJdbcDatabase;
import liquibase.database.DatabaseConnection;
import liquibase.database.OfflineConnection;
import liquibase.database.jvm.JdbcConnection;
import liquibase.exception.DatabaseException;
import liquibase.executor.ExecutorService;
import liquibase.statement.core.RawSqlStatement;
import liquibase.structure.DatabaseObject;
import java.sql.Driver;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.Locale;
public class DerbyDatabase extends AbstractJdbcDatabase {
protected int driverVersionMajor;
protected int driverVersionMinor;
private boolean shutdownEmbeddedDerby = true;
public DerbyDatabase() {
super.setCurrentDateTimeFunction("CURRENT_TIMESTAMP");
super.sequenceNextValueFunction = "NEXT VALUE FOR %s";
super.sequenceCurrentValueFunction = "(SELECT currentvalue FROM sys.syssequences WHERE sequencename = upper('%s'))";
determineDriverVersion();
//add reserved words from http://developer.mimer.com/validator/sql-reserved-words.tml
this.addReservedWords(Arrays.asList("ABSOLUTE", "ACTION", "ADD", "AFTER", "ALL", "ALLOCATE", "ALTER", "AND", "ANY", "ARE", "ARRAY", "AS", "ASC", "ASENSITIVE", "ASSERTION", "ASYMMETRIC", "AT", "ATOMIC", "AUTHORIZATION", "AVG", "BEFORE", "BEGIN", "BETWEEN", "BIGINT", "BINARY", "BIT", "BIT_LENGTH", "BLOB", "BOOLEAN", "BOTH", "BREADTH", "BY", "CALL", "CALLED", "CASCADE", "CASCADED", "CASE", "CAST", "CATALOG", "CHAR", "CHARACTER", "CHARACTER_LENGTH", "CHAR_LENGTH", "CHECK", "CLOB", "CLOSE", "COALESCE", "COLLATE", "COLLATION", "COLUMN", "COMMIT", "CONDITION", "CONNECT", "CONNECTION", "CONSTRAINT", "CONSTRAINTS", "CONSTRUCTOR", "CONTAINS", "CONTINUE", "CONVERT", "CORRESPONDING", "COUNT", "CREATE", "CROSS", "CUBE", "CURRENT", "CURRENT_DATE", "CURRENT_DEFAULT_TRANSFORM_GROUP", "CURRENT_PATH", "CURRENT_ROLE", "CURRENT_TIME", "CURRENT_TIMESTAMP", "CURRENT_TRANSFORM_GROUP_FOR_TYPE", "CURRENT_USER", "CURSOR", "CYCLE", "DATA", "DATE", "DAY", "DEALLOCATE", "DEC", "DECIMAL", "DECLARE", "DEFAULT", "DEFERRABLE", "DEFERRED", "DELETE", "DEPTH", "DEREF", "DESC", "DESCRIBE", "DESCRIPTOR", "DETERMINISTIC", "DIAGNOSTICS", "DISCONNECT", "DISTINCT", "DO", "DOMAIN", "DOUBLE", "DROP", "DYNAMIC", "EACH", "ELEMENT", "ELSE", "ELSEIF", "END", "EQUALS", "ESCAPE", "EXCEPT", "EXCEPTION", "EXEC", "EXECUTE", "EXISTS", "EXIT", "EXTERNAL", "EXTRACT", "FALSE", "FETCH", "FILTER", "FIRST", "FLOAT", "FOR", "FOREIGN", "FOUND", "FREE", "FROM", "FULL", "FUNCTION", "GENERAL", "GET", "GLOBAL", "GO", "GOTO", "GRANT", "GROUP", "GROUPING", "HANDLER", "HAVING", "HOLD", "HOUR", "IDENTITY", "IF", "IMMEDIATE", "IN", "INDICATOR", "INITIALLY", "INNER", "INOUT", "INPUT", "INSENSITIVE", "INSERT", "INT", "INTEGER", "INTERSECT", "INTERVAL", "INTO", "IS", "ISOLATION", "ITERATE", "JOIN", "KEY", "LANGUAGE", "LARGE", "LAST", "LATERAL", "LEADING", "LEAVE", "LEFT", "LEVEL", "LIKE", "LOCAL", "LOCALTIME", "LOCALTIMESTAMP", "LOCATOR", "LOOP", "LOWER", "MAP", "MATCH", "MAX", "MEMBER", "MERGE", "METHOD", "MIN", "MINUTE", "MODIFIES", "MODULE", "MONTH", "MULTISET", "NAMES", "NATIONAL", "NATURAL", "NCHAR", "NCLOB", "NEW", "NEXT", "NO", "NONE", "NOT", "NULL", "NULLIF", "NUMERIC", "OBJECT", "OCTET_LENGTH", "OF", "OLD", "ON", "ONLY", "OPEN", "OPTION", "OR", "ORDER", "ORDINALITY", "OUT", "OUTER", "OUTPUT", "OVER", "OVERLAPS", "PAD", "PARAMETER", "PARTIAL", "PARTITION", "PATH", "POSITION", "PRECISION", "PREPARE", "PRESERVE", "PRIMARY", "PRIOR", "PRIVILEGES", "PROCEDURE", "PUBLIC", "RANGE", "READ", "READS", "REAL", "RECURSIVE", "REF", "REFERENCES", "REFERENCING", "RELATIVE", "RELEASE", "REPEAT", "RESIGNAL", "RESTRICT", "RESULT", "RETURN", "RETURNS", "REVOKE", "RIGHT", "ROLE", "ROLLBACK", "ROLLUP", "ROUTINE", "ROW", "ROWS", "SAVEPOINT", "SCHEMA", "SCOPE", "SCROLL", "SEARCH", "SECOND", "SECTION", "SELECT", "SENSITIVE", "SESSION", "SESSION_USER", "SET", "SETS", "SIGNAL", "SIMILAR", "SIZE", "SMALLINT", "SOME", "SPACE", "SPECIFIC", "SPECIFICTYPE", "SQL", "SQLCODE", "SQLERROR", "SQLEXCEPTION", "SQLSTATE", "SQLWARNING", "START", "STATE", "STATIC", "SUBMULTISET", "SUBSTRING", "SUM", "SYMMETRIC", "SYSTEM", "SYSTEM_USER", "TABLE", "TABLESAMPLE", "TEMPORARY", "THEN", "TIME", "TIMESTAMP", "TIMEZONE_HOUR", "TIMEZONE_MINUTE", "TO", "TRAILING", "TRANSACTION", "TRANSLATE", "TRANSLATION", "TREAT", "TRIGGER", "TRIM", "TRUE", "UNDER", "UNDO", "UNION", "UNIQUE", "UNKNOWN", "UNNEST", "UNTIL", "UPDATE", "UPPER", "USAGE", "USER", "USING", "VALUE", "VALUES", "VARCHAR", "VARYING", "VIEW", "WHEN", "WHENEVER", "WHERE", "WHILE", "WINDOW", "WITH", "WITHIN", "WITHOUT", "WORK", "WRITE", "YEAR", "ZONE"));
}
@Override
public boolean isCorrectDatabaseImplementation(DatabaseConnection conn) throws DatabaseException {
return "Apache Derby".equalsIgnoreCase(conn.getDatabaseProductName());
}
@Override
public String getDefaultDriver(String url) {
if (url == null) {
return null;
} else if (url.toLowerCase().startsWith("jdbc:derby://")) {
//Derby client driver class name for versions 10.15.X.X and above.
String derbyNewDriverClassName = "org.apache.derby.client.ClientAutoloadedDriver";
//Derby client driver class name for versions below 10.15.X.X.
String derbyOldDriverClassName = "org.apache.derby.jdbc.ClientDriver";
try {
// Check if we have a driver for versions 10.15.X.X and above. Load and return it if we do.
Class.forName(derbyNewDriverClassName);
return derbyNewDriverClassName;
} catch (ClassNotFoundException exception) {
// Check if we have a driver for versions below 10.15.X.X. Load and return it if we do.
try {
Class.forName(derbyOldDriverClassName);
return derbyOldDriverClassName;
} catch (ClassNotFoundException classNotFoundException) {
// Return class for newer versions anyway
return derbyNewDriverClassName;
}
}
} else if (url.startsWith("jdbc:derby") || url.startsWith("java:derby")) {
//Use EmbeddedDriver if using a derby URL but without the `://` in it
return "org.apache.derby.jdbc.EmbeddedDriver";
}
return null;
}
@Override
public int getPriority() {
return PRIORITY_DEFAULT;
}
@Override
public boolean supportsSchemas() {
return false;
}
@Override
public boolean jdbcCallsCatalogsSchemas() {
return true;
}
@Override
public Integer getDefaultPort() {
return 1527;
}
@Override
protected String getDefaultDatabaseProductName() {
return "Derby";
}
@Override
public String correctObjectName(String objectName, Class objectType) {
if (objectName == null) {
return null;
}
return objectName.toUpperCase(Locale.US);
}
@Override
public String getShortName() {
return "derby";
}
public boolean getShutdownEmbeddedDerby() {
return shutdownEmbeddedDerby;
}
public void setShutdownEmbeddedDerby(boolean shutdown) {
this.shutdownEmbeddedDerby = shutdown;
}
@Override
public boolean supportsSequences() {
return ((driverVersionMajor == 10) && (driverVersionMinor >= 6)) || (driverVersionMajor >= 11);
}
@Override
public boolean supportsInitiallyDeferrableColumns() {
return false;
}
@Override
public String getDateLiteral(String isoDate) {
if (isDateOnly(isoDate)) {
return "DATE(" + super.getDateLiteral(isoDate) + ")";
} else if (isTimeOnly(isoDate)) {
return "TIME(" + super.getDateLiteral(isoDate) + ")";
} else {
String dateString = super.getDateLiteral(isoDate);
int decimalDigits = dateString.length() - dateString.indexOf('.') - 2;
String padding = "";
for (int i = 6; i > decimalDigits; i--) {
padding += "0";
}
return "TIMESTAMP(" + dateString.replaceFirst("'$", padding + "'") + ")";
}
}
@Override
public boolean supportsTablespaces() {
return false;
}
@Override
public String getViewDefinition(CatalogAndSchema schema, String name) throws DatabaseException {
return super.getViewDefinition(schema, name).replaceFirst("CREATE VIEW \\w+ AS ", "");
}
@Override
public void close() throws DatabaseException {
String url = getConnection().getURL();
String driverName = getDefaultDriver(url);
super.close();
if (getShutdownEmbeddedDerby() && (driverName != null) && driverName.toLowerCase().contains("embedded")) {
shutdownDerby(url, driverName);
}
}
protected void shutdownDerby(String url, String driverName) throws DatabaseException {
try {
if (url.contains(";")) {
url = url.substring(0, url.indexOf(";")) + ";shutdown=true";
} else {
url += ";shutdown=true";
}
Scope.getCurrentScope().getLog(getClass()).info("Shutting down derby connection: " + url);
// this cleans up the lock files in the embedded derby database folder
JdbcConnection connection = (JdbcConnection) getConnection();
ClassLoader classLoader = connection.getWrappedConnection().getClass().getClassLoader();
Driver driver = (Driver) classLoader.loadClass(driverName).getConstructor().newInstance();
// this cleans up the lock files in the embedded derby database folder
driver.connect(url, null);
} catch (Exception e) {
if (e instanceof SQLException) {
String state = ((SQLException) e).getSQLState();
if ("XJ015".equals(state) || "08006".equals(state)) {
// "The XJ015 error (successful shutdown of the Derby engine) and the 08006
// error (successful shutdown of a single database) are the only exceptions
// thrown by Derby that might indicate that an operation succeeded. All other
// exceptions indicate that an operation failed."
// See http://db.apache.org/derby/docs/dev/getstart/rwwdactivity3.html
return;
}
}
throw new DatabaseException("Error closing derby cleanly", e);
}
}
/**
* Determine Apache Derby driver major/minor version.
*/
@SuppressWarnings({"static-access", "unchecked"})
protected void determineDriverVersion() {
try {
// Locate the Derby sysinfo class and query its version info
Enumeration it = DriverManager.getDrivers();
while (it.hasMoreElements()) {
Driver driver = it.nextElement();
if (driver.getClass().getName().contains("derby")) {
driverVersionMajor = driver.getMajorVersion();
driverVersionMinor = driver.getMinorVersion();
return;
}
}
// log.debug("Unable to load/access Apache Derby driver class " + "to check version");
driverVersionMajor = 10;
driverVersionMinor = 6;
} catch (Exception e) {
// log.debug("Unable to load/access Apache Derby driver class " + "org.apache.derby.tools.sysinfo to check version: " + e.getMessage());
driverVersionMajor = 10;
driverVersionMinor = 6;
}
}
@Override
protected String getConnectionCatalogName() throws DatabaseException {
if ((getConnection() == null) || (getConnection() instanceof OfflineConnection)) {
return null;
}
try {
return Scope.getCurrentScope().getSingleton(ExecutorService.class).getExecutor("jdbc", this).queryForObject(new RawSqlStatement("select current schema from sysibm.sysdummy1"), String.class);
} catch (Exception e) {
Scope.getCurrentScope().getLog(getClass()).info("Error getting default schema", e);
}
return null;
}
@Override
public boolean supportsCatalogInObjectName(Class type) {
return true;
}
public boolean supportsBooleanDataType() {
if (getConnection() == null) {
return false; ///assume not;
}
try {
return (this.getDatabaseMajorVersion() > 10) || ((this.getDatabaseMajorVersion() == 10) && (this
.getDatabaseMinorVersion() > 7));
} catch (DatabaseException e) {
return false; //assume not
}
}
@Override
public int getMaxFractionalDigitsForTimestamp() {
// According to
// https://db.apache.org/derby/docs/10.7/ref/rrefsqlj27620.html
return 9;
}
}