org.postgresql.clusterhealthy

Class ClusterHeartBeat

java.lang.Object

org.postgresql.clusterhealthy.ClusterHeartBeat

Direct Known Subclasses:

ClusterHeartBeatFailureCluster, ClusterHeartBeatFailureMaster, ClusterHeartBeatMaster

public class ClusterHeartBeat
extends Object

Heartbeat detection, active detection of the primary node, and maintenance of cache after failure The next contest pair active detection of the failed node, detection of the cluster where the primary node has failed, and maintenance of the latest information to the cache set。

Field Summary

Fields

Modifier and Type	Field and Description
static Map<HostSpec,Set<Properties>>	CLUSTER_PROPERTIES

Constructor Summary

Constructors

Constructor and Description
ClusterHeartBeat()

Method Summary

Modifier and Type	Method and Description
void	addClusterNode(HostSpec hostSpecs, HostSpec... value) Perform cache maintenance on cluster nodes connected to hosts
void	addNodeRelationship(HostSpec key, HostSpec[] value, Properties properties) Adding Cluster Information
void	addProperties(HostSpec hostSpec, Set<Properties> properties)
void	cacheProcess(HostSpec hostSpec, Set<HostSpec> slaves, Set<Properties> props, Integer frequency) Post-processing after the primary node fails
void	clear()
HostSpec	findMasterNode(Set<HostSpec> hostSpecSet, Set<Properties> properties) Locate the host on the standby computer
Map<HostSpec,Set<HostSpec>>	getClusterRelationship()
Set<HostSpec>	getClusterSalveNode(HostSpec hostSpec) Get the cluster slave node
Set<Properties>	getProperties(HostSpec hostSpec) get parsed/defaulted connection properties
QueryExecutor	getQueryExecutor(HostSpec hostSpec, Set<Properties> propSet) the node probes the activity by reflecting the tryConnect() method.
void	initPeriodTime()
void	masterNodeProbe() heartbeat task thread.
boolean	nodeRoleIsMaster(QueryExecutor queryExecutor) Check whether the node is the primary node
void	removeClusterNode(HostSpec key, HostSpec newKey, Set<HostSpec> slaves) Update the cluster node relationship
void	removeProperties(HostSpec hostSpec, Properties properties)
void	updateDetection()

Methods inherited from class java.lang.Object

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

Field Detail

CLUSTER_PROPERTIES

public static final Map<HostSpec,Set<Properties>> CLUSTER_PROPERTIES

Constructor Detail

ClusterHeartBeat

public ClusterHeartBeat()

Method Detail

masterNodeProbe

public void masterNodeProbe()

heartbeat task thread.

updateDetection

public void updateDetection()

initPeriodTime

public void initPeriodTime()

getProperties

public Set<Properties> getProperties(HostSpec hostSpec)

get parsed/defaulted connection properties

Parameters:

hostSpec - ip and port

Returns:

properties set

getClusterRelationship

public Map<HostSpec,Set<HostSpec>> getClusterRelationship()

addNodeRelationship

public void addNodeRelationship(HostSpec key,
                                HostSpec[] value,
                                Properties properties)

Adding Cluster Information

Parameters:

key - master

value - secondary list

properties - the parsed/defaulted connection properties

addProperties

public void addProperties(HostSpec hostSpec,
                          Set<Properties> properties)

Parameters:

hostSpec - ip and port

properties - the parsed/defaulted connection properties

removeClusterNode

public void removeClusterNode(HostSpec key,
                              HostSpec newKey,
                              Set<HostSpec> slaves)

Update the cluster node relationship

Parameters:

key - old master

newKey - new master

slaves - slaves set

addClusterNode

public void addClusterNode(HostSpec hostSpecs,
                           HostSpec... value)

Perform cache maintenance on cluster nodes connected to hosts

Parameters:

hostSpecs - the parsed/defaulted connection properties

value - slaves set

getClusterSalveNode

public Set<HostSpec> getClusterSalveNode(HostSpec hostSpec)

Get the cluster slave node

Parameters:

hostSpec - the parsed/defaulted connection properties

Returns:

slaves set

removeProperties

public void removeProperties(HostSpec hostSpec,
                             Properties properties)

Parameters:

hostSpec - ip and port

properties - the parsed/defaulted connection properties

clear

public void clear()

getQueryExecutor

public QueryExecutor getQueryExecutor(HostSpec hostSpec,
                                      Set<Properties> propSet)
                               throws SQLException

the node probes the activity by reflecting the tryConnect() method.

Parameters:

hostSpec - ip and port.

propSet - the parsed/defaulted connection properties

Returns:

QueryExecutor

Throws:

SQLException - new sql exception

nodeRoleIsMaster

public boolean nodeRoleIsMaster(QueryExecutor queryExecutor)

Check whether the node is the primary node

Parameters:

queryExecutor - queryExector

Returns:

true/false

cacheProcess

public void cacheProcess(HostSpec hostSpec,
                         Set<HostSpec> slaves,
                         Set<Properties> props,
                         Integer frequency)

Post-processing after the primary node fails

Parameters:

hostSpec - master ip and port

slaves - slaves set

props - the parsed/defaulted connection properties

findMasterNode

public HostSpec findMasterNode(Set<HostSpec> hostSpecSet,
                               Set<Properties> properties)

Locate the host on the standby computer

Parameters:

hostSpecSet - slaves set

properties - the parsed/defaulted connection properties

Returns:

new master node