org.h2.server

Class TcpServer

java.lang.Object

org.h2.server.TcpServer

All Implemented Interfaces:

Service

public class TcpServer
extends java.lang.Object
implements Service

The TCP server implements the native H2 database server protocol. It supports multiple client connections to multiple databases (many to many). The same database may be opened by multiple clients. Also supported is the mixed mode: opening databases in embedded mode, and at the same time start a TCP server to allow clients to connect to the same database over the network.

Constructor Summary

Constructors

Constructor and Description
TcpServer()

Method Summary

Modifier and Type	Method and Description
java.lang.String	checkKeyAndGetDatabaseName(java.lang.String db) If no key is set, return the original database name.
boolean	getAllowOthers() Check if remote connections are allowed.
static java.lang.String	getManagementDbName(int port) Get the database name of the management database.
java.lang.String	getName() Get the human readable name of the service.
int	getPort() Gets the port this service is listening on.
java.lang.String	getType() Get the human readable short name of the service.
java.lang.String	getURL() Get the URL of this service in a human readable form
void	init(java.lang.String... args) Initialize the service from command line options.
boolean	isDaemon() Check if a daemon thread should be used.
boolean	isRunning(boolean traceError) Check if the service is running.
void	listen() Listen for incoming connections.
void	setShutdownHandler(ShutdownHandler shutdownHandler)
static void	shutdown(java.lang.String url, java.lang.String password, boolean force, boolean all) Stop the TCP server with the given URL.
void	start() Start the service.
void	stop() Stop the service.
static void	stopServer(int port, java.lang.String password, int shutdownMode) Stop a running server.

Methods inherited from class java.lang.Object

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

Constructor Detail

TcpServer

public TcpServer()

Method Detail

getManagementDbName

public static java.lang.String getManagementDbName(int port)

Get the database name of the management database. The management database contains a table with active sessions (SESSIONS).

Parameters:

port - the TCP server port

Returns:

the database name (usually starting with mem:)

setShutdownHandler

public void setShutdownHandler(ShutdownHandler shutdownHandler)

init

public void init(java.lang.String... args)

Description copied from interface: Service

Initialize the service from command line options.

Specified by:

init in interface Service

Parameters:

args - the command line options

getURL

public java.lang.String getURL()

Description copied from interface: Service

Get the URL of this service in a human readable form

Specified by:

getURL in interface Service

Returns:

the url

getPort

public int getPort()

Description copied from interface: Service

Gets the port this service is listening on.

Specified by:

getPort in interface Service

Returns:

the port

start

public void start()
           throws java.sql.SQLException

Description copied from interface: Service

Start the service. This usually means create the server socket. This method must not block.

Specified by:

start in interface Service

Throws:

java.sql.SQLException

listen

public void listen()

Description copied from interface: Service

Listen for incoming connections. This method blocks.

Specified by:

listen in interface Service

isRunning

public boolean isRunning(boolean traceError)

Description copied from interface: Service

Check if the service is running.

Specified by:

isRunning in interface Service

Parameters:

traceError - if errors should be written

Returns:

if the server is running

stop

public void stop()

Description copied from interface: Service

Stop the service.

Specified by:

stop in interface Service

stopServer

public static void stopServer(int port,
                              java.lang.String password,
                              int shutdownMode)

Stop a running server. This method is called via reflection from the STOP_SERVER function.

Parameters:

port - the port where the server runs, or 0 for all running servers

password - the password (or null)

shutdownMode - the shutdown mode, SHUTDOWN_NORMAL or SHUTDOWN_FORCE.

getAllowOthers

public boolean getAllowOthers()

Description copied from interface: Service

Check if remote connections are allowed.

Specified by:

getAllowOthers in interface Service

Returns:

true if remote connections are allowed

getType

public java.lang.String getType()

Description copied from interface: Service

Get the human readable short name of the service.

Specified by:

getType in interface Service

Returns:

the type

getName

public java.lang.String getName()

Description copied from interface: Service

Get the human readable name of the service.

Specified by:

getName in interface Service

Returns:

the name

shutdown

public static void shutdown(java.lang.String url,
                            java.lang.String password,
                            boolean force,
                            boolean all)
                     throws java.sql.SQLException

Stop the TCP server with the given URL.

Parameters:

url - the database URL

password - the password

force - if the server should be stopped immediately

all - whether all TCP servers that are running in the JVM should be stopped

Throws:

java.sql.SQLException

checkKeyAndGetDatabaseName

public java.lang.String checkKeyAndGetDatabaseName(java.lang.String db)

If no key is set, return the original database name. If a key is set, check if the key matches. If yes, return the correct database name. If not, throw an exception.

Parameters:

db - the key to test (or database name if no key is used)

Returns:

the database name

Throws:

DbException - if a key is set but doesn't match

isDaemon

public boolean isDaemon()

Description copied from interface: Service

Check if a daemon thread should be used.

Specified by:

isDaemon in interface Service

Returns:

true if a daemon thread should be used