Package org.apache.catalina.tribes.membership.cloud

Class KubernetesMembershipProvider

java.lang.Object

org.apache.catalina.tribes.membership.MembershipProviderBase

org.apache.catalina.tribes.membership.cloud.CloudMembershipProvider

org.apache.catalina.tribes.membership.cloud.KubernetesMembershipProvider

All Implemented Interfaces:

ChannelListener, Heartbeat, MembershipProvider

public class KubernetesMembershipProvider
extends CloudMembershipProvider

A MembershipProvider that uses Kubernetes API to retrieve the members of a cluster.

Field Summary

Fields inherited from class org.apache.catalina.tribes.membership.cloud.CloudMembershipProvider

connectionTimeout, CUSTOM_ENV_PREFIX, expirationTime, headers, localIp, port, readTimeout, sm, startTime, streamProvider, url

Fields inherited from class org.apache.catalina.tribes.membership.MembershipProviderBase

executor, membership, membershipListener, service

Constructor Summary

Constructors

Constructor	Description
KubernetesMembershipProvider()	Default constructor.

Method Summary

Modifier and Type	Method	Description
protected Member[]	fetchMembers()	Fetch current cluster members from the cloud orchestration.
protected void	parsePods(Reader reader, List<MemberImpl> members)	Parses the pod data from the given reader and populates the members list.
void	start(int level)	Start the membership provider.
boolean	stop(int level)	Stop the membership provider.

Methods inherited from class org.apache.catalina.tribes.membership.cloud.CloudMembershipProvider

accept, digest, getEnv, getNamespace, heartbeat, init, messageReceived, updateMember

Methods inherited from class org.apache.catalina.tribes.membership.MembershipProviderBase

getMember, getMembers, hasMembers, setMembershipListener, setMembershipService

Methods inherited from class java.lang.Object

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

Constructor Details

KubernetesMembershipProvider

public KubernetesMembershipProvider()

Default constructor.

Method Details

start

public void start(int level)
           throws Exception

Description copied from interface: MembershipProvider

Start the membership provider.

Specified by:

start in interface MembershipProvider

Overrides:

start in class CloudMembershipProvider

Parameters:

level - the readiness level

• Channel.DEFAULT - will start all services
• Channel.MBR_RX_SEQ - starts the membership receiver
• Channel.MBR_TX_SEQ - starts the membership broadcaster

Throws:

Exception - if an error occurs

stop

public boolean stop(int level)
             throws Exception

Description copied from interface: MembershipProvider

Stop the membership provider.

Specified by:

stop in interface MembershipProvider

Overrides:

stop in class CloudMembershipProvider

Parameters:

level - the readiness level

• Channel.DEFAULT - will stop all services
• Channel.MBR_RX_SEQ - stops the membership receiver
• Channel.MBR_TX_SEQ - stops the membership broadcaster

Returns:

true if successful

Throws:

Exception - if an error occurs

fetchMembers

protected Member[] fetchMembers()

Description copied from class: CloudMembershipProvider

Fetch current cluster members from the cloud orchestration.

Specified by:

fetchMembers in class CloudMembershipProvider

Returns:

the member array

parsePods

protected void parsePods(Reader reader,
 List<MemberImpl> members)

Parses the pod data from the given reader and populates the members list.

Parameters:

reader - The reader with pod data

members - The list to populate with members