org.postgresql.clusterchooser

Class GlobalClusterStatusTracker

java.lang.Object

org.postgresql.clusterchooser.GlobalClusterStatusTracker

public class GlobalClusterStatusTracker
extends Object

Keeps track of HostSpec targets in a global map.

Constructor Summary

Constructors

Constructor and Description
GlobalClusterStatusTracker()

Method Summary

Modifier and Type	Method and Description
static Iterator<ClusterSpec>	getClusterFromHostSpecs(HostSpec[] hostSpecs, Properties info) Split the clusters in the url, get the master cluster first when there are dual clusters.
static ClusterStatus	getClusterStatus(HostSpec[] hostSpecs)
static String	getMasterClusterkey(String key, boolean block) If block is set to true, waiting will be prevented if the master cluster cannot be found.
static boolean	isVaildPriorityServers(Properties props) Determine whether the configuration to support disaster recovery switching is effective.
static String	keyFromClusterSpec(ClusterSpec clusterSpec) Returns a key representing the cluster based on clusterSpec.
static void	refreshProperties(Properties props) Submit the cluster information in props.
static void	reportClusterStatus(ClusterSpec clusterSpec, ClusterStatus clusterStatus) Store the actual observed cluster status.
static void	reportMasterCluster(Properties props, ClusterSpec clusterSpec) The actual primary cluster in the storage cluster.

Methods inherited from class java.lang.Object

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

Constructor Detail

GlobalClusterStatusTracker

public GlobalClusterStatusTracker()

Method Detail

reportClusterStatus

public static void reportClusterStatus(ClusterSpec clusterSpec,
                                       ClusterStatus clusterStatus)

Store the actual observed cluster status.

Parameters:

clusterSpec - The cluster whose status is known.

clusterStatus - Latest known status for the cluster.

reportMasterCluster

public static void reportMasterCluster(Properties props,
                                       ClusterSpec clusterSpec)

The actual primary cluster in the storage cluster.

Parameters:

props -

clusterSpec -

getClusterStatus

public static ClusterStatus getClusterStatus(HostSpec[] hostSpecs)

Parameters:

hostSpecs -

Returns:

refreshProperties

public static void refreshProperties(Properties props)

Submit the cluster information in props. And try to get the information of the master cluster from the refreshed results.

Parameters:

props - Connection properties.

getMasterClusterkey

public static String getMasterClusterkey(String key,
                                         boolean block)

If block is set to true, waiting will be prevented if the master cluster cannot be found.

Parameters:

key - Key in the connection string.

block - Concurrency lock.

Returns:

isVaildPriorityServers

public static boolean isVaildPriorityServers(Properties props)

Determine whether the configuration to support disaster recovery switching is effective. if the disaster tolerance switch function is used, the value of this parameter should be a number, and the value should be greater than 0 and less than the number of nodes in the connection string.

Return true if the above conditions are met, otherwise, return false.

Parameters:

props - Connection properties

Returns:

getClusterFromHostSpecs

public static Iterator<ClusterSpec> getClusterFromHostSpecs(HostSpec[] hostSpecs,
                                                            Properties info)

Split the clusters in the url, get the master cluster first when there are dual clusters.

Parameters:

hostSpecs - Specification information of all hosts in the cluster.

info - the parsed/defaulted connection properties

Returns:

keyFromClusterSpec

public static String keyFromClusterSpec(ClusterSpec clusterSpec)

Returns a key representing the cluster based on clusterSpec.

Parameters:

clusterSpec - Nodes in the cluster.

Returns:

Key representing the cluster.