edu.ucsb.nceas.metacat.admin

Class DBAdmin

java.lang.Object

edu.ucsb.nceas.metacat.admin.MetacatAdmin

edu.ucsb.nceas.metacat.admin.DBAdmin

public class DBAdmin
extends MetacatAdmin

Control the display of the database configuration page and the processing of the configuration values.

Field Summary

Fields

Modifier and Type	Field and Description
static int	DB_DOES_NOT_EXIST
static int	TABLES_DO_NOT_EXIST
static int	TABLES_EXIST
static int	VERSION_ACTIVE
static int	VERSION_INACTIVE

Method Summary

Methods

Modifier and Type	Method and Description
void	configureDatabase(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Handle configuration of the database the first time that Metacat starts or when it is explicitly called.
int	getDBStatus() Performs a status check on the database.
DBVersion	getDBVersion() Get the version of the database as a string
static DBAdmin	getInstance() Get the single instance of DBAdmin.
DBVersion	getUnRegisteredDBVersion() Finds the version of the database for a database that does not have a dbVersion table yet.
java.util.Vector<java.lang.String>	getUpdateClasses()
java.util.Vector<java.lang.String>	getUpdateScripts() Creates a list of database update script names by looking at the database version and the metacat version and then getting any script that is inbetween the two (inclusive of metacat version).
java.util.Vector<java.lang.String>	loadSQLFromFile(java.lang.String sqlFileName) Very basic utility to read sql from a file and return a vector of the individual sql statements.
void	runSQLFile(java.lang.String sqlFileName) Runs the commands in a sql script.
void	updateDBVersion() Updates the version of the database.
void	upgradeDatabase() Iterates through the list of scripts that need to be run to upgrade the database and calls runSQLFile on each.
java.lang.String	validateDBConnectivity(java.lang.String dbDriver, java.lang.String connection, java.lang.String user, java.lang.String password) Validate connectivity to the database.
protected java.util.Vector<java.lang.String>	validateOptions(javax.servlet.http.HttpServletRequest request) Validate the most important configuration options submitted by the user.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DB_DOES_NOT_EXIST

public static final int DB_DOES_NOT_EXIST

See Also:

Constant Field Values

TABLES_DO_NOT_EXIST

public static final int TABLES_DO_NOT_EXIST

See Also:

Constant Field Values

TABLES_EXIST

public static final int TABLES_EXIST

See Also:

Constant Field Values

VERSION_INACTIVE

public static final int VERSION_INACTIVE

See Also:

Constant Field Values

VERSION_ACTIVE

public static final int VERSION_ACTIVE

See Also:

Constant Field Values

Method Detail

getInstance

public static DBAdmin getInstance()
                           throws AdminException

Get the single instance of DBAdmin.

Returns:

the single instance of DBAdmin

Throws:

AdminException

configureDatabase

public void configureDatabase(javax.servlet.http.HttpServletRequest request,
                     javax.servlet.http.HttpServletResponse response)
                       throws AdminException

Handle configuration of the database the first time that Metacat starts or when it is explicitly called. Collect necessary update information from the administrator.

Parameters:

request - the http request information

response - the http response to be sent back to the client

Throws:

AdminException

getDBStatus

public int getDBStatus()
                throws java.sql.SQLException,
                       edu.ucsb.nceas.utilities.PropertyNotFoundException

Performs a status check on the database.

Throws:

java.sql.SQLException

edu.ucsb.nceas.utilities.PropertyNotFoundException

getDBVersion

public DBVersion getDBVersion()
                       throws AdminException

Get the version of the database as a string

Throws:

AdminException

getUnRegisteredDBVersion

public DBVersion getUnRegisteredDBVersion()
                                   throws AdminException,
                                          java.sql.SQLException

Finds the version of the database for a database that does not have a dbVersion table yet. Work backwards with various clues found in update scripts to find the version.

Throws:

AdminException

java.sql.SQLException

updateDBVersion

public void updateDBVersion()
                     throws java.sql.SQLException

Updates the version of the database. Typically this is done in the update scripts that get run when we upgrade the application. This method can be used if you are automating a patch on the database internally.

Throws:

java.sql.SQLException

validateDBConnectivity

public java.lang.String validateDBConnectivity(java.lang.String dbDriver,
                                      java.lang.String connection,
                                      java.lang.String user,
                                      java.lang.String password)

Validate connectivity to the database. Validation methods return a string error message if there is an issue. This allows the calling code to run several validations and compile the errors into a list that can be displayed on a web page if desired.

Parameters:

dbDriver - the database driver

connection - the jdbc connection string

user - the user name

password - the login password

Returns:

a string holding error message if validation fails.

getUpdateScripts

public java.util.Vector<java.lang.String> getUpdateScripts()
                                                    throws AdminException

Creates a list of database update script names by looking at the database version and the metacat version and then getting any script that is inbetween the two (inclusive of metacat version).

Throws:

AdminException

getUpdateClasses

public java.util.Vector<java.lang.String> getUpdateClasses()
                                                    throws AdminException

Throws:

AdminException

upgradeDatabase

public void upgradeDatabase()
                     throws AdminException

Iterates through the list of scripts that need to be run to upgrade the database and calls runSQLFile on each.

Throws:

AdminException

runSQLFile

public void runSQLFile(java.lang.String sqlFileName)
                throws AdminException,
                       java.sql.SQLException

Runs the commands in a sql script. Individual commands are loaded into a string vector and run one at a time.

Parameters:

sqlFileName - the name of the file holding the sql statements that need to get run.

Throws:

AdminException

java.sql.SQLException

loadSQLFromFile

public java.util.Vector<java.lang.String> loadSQLFromFile(java.lang.String sqlFileName)
                                                   throws java.io.IOException

Very basic utility to read sql from a file and return a vector of the individual sql statements. This ignores any line that starts with /* or *. It strips anything following --. Sql is parsed by looking for lines that start with one of the following identifiers: INSERT, UPDATE, ALTER, CREATE, DROP, BEGIN and COMMIT. It then assumes that everything until the line that ends with ; is part of the sql, excluding comments.

Parameters:

sqlFileName - the name of the file to read.

Returns:

a vector holding the individual sql statements.

Throws:

java.io.IOException

validateOptions

protected java.util.Vector<java.lang.String> validateOptions(javax.servlet.http.HttpServletRequest request)

Validate the most important configuration options submitted by the user.

Specified by:

validateOptions in class MetacatAdmin

Returns:

a vector holding error message for any fields that fail validation.