Package io.hekate.cluster.split

Class JdbcConnectivityDetector

java.lang.Object

io.hekate.cluster.split.JdbcConnectivityDetector

All Implemented Interfaces:

SplitBrainDetector, ConfigReportSupport

public class JdbcConnectivityDetector
extends Object
implements SplitBrainDetector, ConfigReportSupport

JDBC connectivity-based detector.

This implementation of SplitBrainDetector utilizes Connection.isValid(int) method to check if some pre-configured JDBC database is reachable.

Note that it is possible to combine multiple detectors with the help of SplitBrainDetectorGroup.

See Also:

ClusterServiceFactory.setSplitBrainDetector(SplitBrainDetector)

Constructor Summary

Constructors

Constructor	Description
JdbcConnectivityDetector(DataSource ds, int timeout)	Constructs a new instance.

Method Summary

Modifier and Type	Method	Description
DataSource	datasource()	Datasource to check.
boolean	isValid(ClusterNode localNode)	Performs a split-brain check and returns true if local node can reach other members of the cluster.
void	report(ConfigReporter report)	Report configuration.
int	timeout()	Check timeout in seconds.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

JdbcConnectivityDetector

public JdbcConnectivityDetector(DataSource ds,
                                int timeout)

Constructs a new instance.

Parameters:

ds - Data source.

timeout - Timeout in seconds (see Connection.isValid(int)).

Method Detail

report

public void report(ConfigReporter report)

Description copied from interface: ConfigReportSupport

Report configuration.

Specified by:

report in interface ConfigReportSupport

Parameters:

report - Reporter.

datasource

public DataSource datasource()

Datasource to check.

Returns:

Datasource to check.

timeout

public int timeout()

Check timeout in seconds.

Returns:

Timeout in seconds.

isValid

public boolean isValid(ClusterNode localNode)

Description copied from interface: SplitBrainDetector

Performs a split-brain check and returns true if local node can reach other members of the cluster.

If this method returns false then HekateFatalErrorPolicy will be applied with ClusterSplitBrainException as a cause.

Specified by:

isValid in interface SplitBrainDetector

Parameters:

localNode - Local node (where the check is performed).

Returns:

true if local node can reach other members of the cluster.

toString

public String toString()

Overrides:

toString in class Object