org.jgroups.protocols

Class MULTI_PING

java.lang.Object

org.jgroups.stack.Protocol

org.jgroups.protocols.Discovery

org.jgroups.protocols.MULTI_PING

public class MULTI_PING
extends Discovery

Protocol to invoke multiple discovery protocols in the same stack. All discovery protocols needs to be _below_ this one, e.g.

     
     
     
     
     
     
     
      ...
 

Since:

4.0.8

Author:

Bela Ban

Nested Class Summary

Nested classes/interfaces inherited from class org.jgroups.protocols.Discovery

Discovery.DiscoveryCacheDisseminationTask

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.List<Discovery>	discovery_protocols

Fields inherited from class org.jgroups.protocols.Discovery

async_discovery, async_discovery_use_separate_thread_per_request, break_on_coord_rsp, cluster_name, current_coord, discovery_rsp_expiry_time, is_coord, is_leaving, is_server, local_addr, max_members_in_discovery_request, max_rank_to_reply, num_discovery_requests, ping_responses, return_entire_cache, send_cache_on_join, sends_can_block, stagger_timeout, timer, transport_supports_multicasting, use_disk_cache, use_ip_addrs, view, WHITESPACE

Fields inherited from class org.jgroups.stack.Protocol

after_creation_hook, down_prot, ergonomics, id, log, stack, stats, up_prot

Constructor Summary

Constructors

Constructor and Description
MULTI_PING()

Method Summary

Modifier and Type	Method and Description
Responses	findMembers(java.util.List<Address> members, boolean initial_discovery, boolean async)
protected void	findMembers(java.util.List<Address> members, boolean initial_discovery, Responses responses) Fetches information (e.g.
protected void	findMembers(java.util.List<Address> members, boolean initial_discovery, Responses rsps, boolean async)
java.lang.String	getDiscoveryProtocols()
void	init() Called after instance has been created (null constructor) and before protocol is started.
boolean	isDynamic()
void	weedOutCompletedDiscoveryResponses() Removes responses which are done or whose timeout has expired (in the latter case, an expired response is marked as done)

Methods inherited from class org.jgroups.protocols.Discovery

addDiscoveryResponseToCaches, addResponse, addResponse, addressAsString, addToCache, breakOnCoordResponse, breakOnCoordResponse, deserialize, discoveryRequestReceived, discoveryRspExpiryTime, disseminateDiscoveryInformation, down, dumpCache, findInitialMembersAsString, getCurrentCoord, getNumberOfDiscoveryRequestsSent, getView, getViewId, handleConnect, handleDisconnect, handleDiscoveryResponse, isCoord, isMergeRunning, marshal, providedUpServices, read, readPingData, resetStats, returnEntireCache, returnEntireCache, sendCacheInformation, sendDiscoveryResponse, serializeWithoutView, staggerTimeout, staggerTimeout, start, startCacheDissemination, stop, up, up, useDiskCache, useDiskCache, write

Methods inherited from class org.jgroups.stack.Protocol

accept, afterCreationHook, destroy, down, enableStats, getConfigurableObjects, getDownProtocol, getDownServices, getId, getIdsAbove, getLevel, getLog, getName, getProtocolStack, getSocketFactory, getThreadFactory, getTransport, getUpProtocol, getUpServices, getValue, isErgonomics, level, parse, providedDownServices, requiredDownServices, requiredUpServices, resetStatistics, setDownProtocol, setErgonomics, setId, setLevel, setProperties, setProtocolStack, setSocketFactory, setUpProtocol, setValue, statsEnabled, up

Methods inherited from class java.lang.Object

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

Field Detail

discovery_protocols

protected final java.util.List<Discovery> discovery_protocols

Constructor Detail

MULTI_PING

public MULTI_PING()

Method Detail

getDiscoveryProtocols

public java.lang.String getDiscoveryProtocols()

isDynamic

public boolean isDynamic()

Specified by:

isDynamic in class Discovery

init

public void init()
          throws java.lang.Exception

Description copied from class: Protocol

Called after instance has been created (null constructor) and before protocol is started. Properties are already set. Other protocols are not yet connected and events cannot yet be sent.

Overrides:

init in class Discovery

Throws:

java.lang.Exception - Thrown if protocol cannot be initialized successfully. This will cause the ProtocolStack to fail, so the channel constructor will throw an exception

weedOutCompletedDiscoveryResponses

public void weedOutCompletedDiscoveryResponses()

Description copied from class: Discovery

Removes responses which are done or whose timeout has expired (in the latter case, an expired response is marked as done)

Overrides:

weedOutCompletedDiscoveryResponses in class Discovery

findMembers

protected void findMembers(java.util.List<Address> members,
                           boolean initial_discovery,
                           Responses responses)

Description copied from class: Discovery

Fetches information (e.g. physical address, logical name) for the given member addresses. Needs to add responses to the Responses object. If Discovery.async_discovery is true, this method will be called in a separate thread, otherwise the caller's thread will be used.

Specified by:

findMembers in class Discovery

Parameters:

members - A list of logical addresses (typically UUIDs). If null, then information for all members is fetched

initial_discovery - Set to true if this is for the initial membership discovery. Some protocols (e.g. file based ones) may return only the information for the coordinator(s).

responses - The list to which responses should be added

findMembers

public Responses findMembers(java.util.List<Address> members,
                             boolean initial_discovery,
                             boolean async)

Overrides:

findMembers in class Discovery

findMembers

protected void findMembers(java.util.List<Address> members,
                           boolean initial_discovery,
                           Responses rsps,
                           boolean async)