fj.control.db
Class DbState

java.lang.Object
  fj.control.db.DbState

public final class DbState
extends Object

Performs database I/O, in order to read or write the database state.

Method Summary

static Connector	driverManager(String url) A simple connector (the default) that gets connections to the given database URL from the driver manager.
static DbState	reader(Connector pc) Returns a new reader that reads the database via the given Connector.
static DbState	reader(String url) Creates a database state reader given a connection URL.
<A> A	run(DB<A> dba) Runs the given database action as a single transaction.
static DbState	writer(Connector pc) Returns a new writer that writes the database via the given Connector.
static DbState	writer(String url) Creates a database state writer given a connection URL.

Methods inherited from class java.lang.Object

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

Method Detail

driverManager

public static Connector driverManager(String url)

A simple connector (the default) that gets connections to the given database URL from the driver manager.

Parameters:

url - The database URL to connect to.

Returns:

A connector that generates connections to the given database.

reader

public static DbState reader(String url)

Creates a database state reader given a connection URL.

Parameters:

url - The connection URL to the database.

Returns:

A database state reader that reads the given database.

writer

public static DbState writer(String url)

Creates a database state writer given a connection URL.

Parameters:

url - The connection URL to the database.

Returns:

A database state writer that writes the given database.

reader

public static DbState reader(Connector pc)

Returns a new reader that reads the database via the given Connector.

Parameters:

pc - A connector with which to generate database connections.

Returns:

A new reader that reads the database via the given Connector.

writer

public static DbState writer(Connector pc)

Returns a new writer that writes the database via the given Connector.

Parameters:

pc - A connector with which to generate database connections.

Returns:

A new writer that writes the database via the given Connector.

run

public <A> A run(DB<A> dba)
      throws SQLException

Runs the given database action as a single transaction.

Parameters:

dba - A database action to run.

Returns:

The result of running the action against the database.

Throws:

SQLException - in case of a database error.