Package org.apache.plc4x.java.utils.connectionpool2

Class CachedDriverManager

java.lang.Object

org.apache.plc4x.java.PlcDriverManager

org.apache.plc4x.java.utils.connectionpool2.CachedDriverManager

All Implemented Interfaces:

CachedDriverManagerMBean

public class CachedDriverManager
extends PlcDriverManager
implements CachedDriverManagerMBean

Driver Manager who Caches ONE Single Connection.

Usage Example: PlcDriverManager manager = new PlcDriverManager(); PlcDriverManager cached = new CachedDriverManager(url, () -> manager.getConnection(url)); Now you can use "cached" everywhere you need the corresponding connection.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	LONG_BORROW_WATCHDOG_TIMEOUT_MS

Fields inherited from class org.apache.plc4x.java.PlcDriverManager

classLoader

Constructor Summary

Constructors

Constructor	Description
CachedDriverManager(String url, PlcConnectionFactory connectionFactory)
CachedDriverManager(String url, PlcConnectionFactory connectionFactory, int timeoutMillis)

Method Summary

Modifier and Type	Method	Description
PlcConnection	getConnection(String url)	This call now waits (with the timeout given in constructor) until it fails or returns a valid connection in this window.
PlcConnection	getConnection(String url, PlcAuthentication authentication)
int	getNumberOfBorrows()
int	getNumberOfConnects()
int	getNumberOfRejections()
int	getNumberOfWachtdogs()
int	getQueueSize()
org.apache.plc4x.java.utils.connectionpool2.CachedDriverManager.ConnectionState	getState()
String	getStateString()
void	handleBrokenConnection()	used to signal, that the connection does not work and has to be re-established.
boolean	isConnectionAvailable()
void	returnConnection(PlcConnection activeConnection)
void	triggerReconnect()

Methods inherited from class org.apache.plc4x.java.PlcDriverManager

getDriver, getDriverForUrl, listDrivers

Methods inherited from class java.lang.Object

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

Field Details

LONG_BORROW_WATCHDOG_TIMEOUT_MS

public static final int LONG_BORROW_WATCHDOG_TIMEOUT_MS

See Also:

• Constant Field Values

Constructor Details

CachedDriverManager

public CachedDriverManager(String url,
 PlcConnectionFactory connectionFactory)

CachedDriverManager

public CachedDriverManager(String url,
 PlcConnectionFactory connectionFactory,
 int timeoutMillis)

Parameters:

url - Url that this connection is for

connectionFactory - Factory to create a suitable connection.

timeoutMillis - Time out in milliseconds

Method Details

returnConnection

public void returnConnection(PlcConnection activeConnection)

handleBrokenConnection

public void handleBrokenConnection()

used to signal, that the connection does not work and has to be re-established.

isConnectionAvailable

public boolean isConnectionAvailable()

getConnection

public PlcConnection getConnection(String url)
                            throws PlcConnectionException

This call now waits (with the timeout given in constructor) until it fails or returns a valid connection in this window.

Overrides:

getConnection in class PlcDriverManager

Throws:

PlcConnectionException - if connection cannot be established

getConnection

public PlcConnection getConnection(String url,
 PlcAuthentication authentication)
                            throws PlcConnectionException

Overrides:

getConnection in class PlcDriverManager

Throws:

PlcConnectionException

getState

public org.apache.plc4x.java.utils.connectionpool2.CachedDriverManager.ConnectionState getState()

getStateString

public String getStateString()

Specified by:

getStateString in interface CachedDriverManagerMBean

getNumberOfConnects

public int getNumberOfConnects()

Specified by:

getNumberOfConnects in interface CachedDriverManagerMBean

getNumberOfBorrows

public int getNumberOfBorrows()

Specified by:

getNumberOfBorrows in interface CachedDriverManagerMBean

getNumberOfRejections

public int getNumberOfRejections()

Specified by:

getNumberOfRejections in interface CachedDriverManagerMBean

getNumberOfWachtdogs

public int getNumberOfWachtdogs()

Specified by:

getNumberOfWachtdogs in interface CachedDriverManagerMBean

getQueueSize

public int getQueueSize()

Specified by:

getQueueSize in interface CachedDriverManagerMBean

triggerReconnect

public void triggerReconnect()

Specified by:

triggerReconnect in interface CachedDriverManagerMBean