com.mysql.cj.jdbc.ha.plugins

Class MonitorConnectionContext

java.lang.Object

com.mysql.cj.jdbc.ha.plugins.MonitorConnectionContext

public class MonitorConnectionContext
extends java.lang.Object

Monitoring context for each connection. This contains each connection's criteria for whether a server should be considered unhealthy. The context is shared between the main thread and the monitor thread.

Constructor Summary

Constructors

Constructor and Description
MonitorConnectionContext(IMonitor monitor, JdbcConnection connectionToAbort, Log log, int failureDetectionTimeMillis, int failureDetectionIntervalMillis, int failureDetectionCount) Constructor.

Method Summary

Modifier and Type	Method and Description
long	getExpectedActiveMonitoringStartTimeNano()
int	getFailureDetectionCount()
int	getFailureDetectionIntervalMillis()
int	getFailureDetectionTimeMillis()
IMonitor	getMonitor()
boolean	isActiveContext()
boolean	isNodeUnhealthy()
void	setInactive()
void	updateConnectionStatus(java.lang.String nodeName, long statusCheckStartNano, long statusCheckEndNano, boolean isValid) Update whether the connection is still valid if the total elapsed time has passed the grace period.

Methods inherited from class java.lang.Object

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

Constructor Detail

MonitorConnectionContext

public MonitorConnectionContext(IMonitor monitor,
                                JdbcConnection connectionToAbort,
                                Log log,
                                int failureDetectionTimeMillis,
                                int failureDetectionIntervalMillis,
                                int failureDetectionCount)

Constructor.

Parameters:

monitor - A reference to a monitor object.

connectionToAbort - A reference to the connection associated with this context that will be aborted in case of server failure.

log - A Log implementation.

failureDetectionTimeMillis - Grace period after which node monitoring starts.

failureDetectionIntervalMillis - Interval between each failed connection check.

failureDetectionCount - Number of failed connection checks before considering database node as unhealthy.

Method Detail

getFailureDetectionTimeMillis

public int getFailureDetectionTimeMillis()

getFailureDetectionIntervalMillis

public int getFailureDetectionIntervalMillis()

getFailureDetectionCount

public int getFailureDetectionCount()

getExpectedActiveMonitoringStartTimeNano

public long getExpectedActiveMonitoringStartTimeNano()

getMonitor

public IMonitor getMonitor()

isNodeUnhealthy

public boolean isNodeUnhealthy()

isActiveContext

public boolean isActiveContext()

setInactive

public void setInactive()

updateConnectionStatus

public void updateConnectionStatus(java.lang.String nodeName,
                                   long statusCheckStartNano,
                                   long statusCheckEndNano,
                                   boolean isValid)

Update whether the connection is still valid if the total elapsed time has passed the grace period.

Parameters:

nodeName - A node name for logging purposes.

statusCheckStartNano - The time when connection status check started in nanoseconds.

statusCheckEndNano - The time when connection status check ended in nanoseconds.

isValid - Whether the connection is valid.