FD_ALL2

java.lang.Object
- org.jgroups.stack.Protocol
- - org.jgroups.protocols.FailureDetection
  - - org.jgroups.protocols.FD_ALL2

```
public class FD_ALL2
extends FailureDetection
```
Failure detection based on simple heartbeat protocol. Every member periodically (interval ms) multicasts a heartbeat. Every member also maintains a table of all members (minus itself). When data or a heartbeat from P is received, we set the flag associated with P to true. Periodically, we check for expired members, and suspect those whose flag is false (no heartbeat or message received within timeout ms).

Version:

3.5

Author:

Bela Ban

Nested Class Summary
- Nested classes/interfaces inherited from class org.jgroups.protocols.FailureDetection
  FailureDetection.HeartbeatHeader

Field Summary

Fields
Modifier and Type Field Description

protected java.util.Map<Address,java.util.concurrent.atomic.AtomicBoolean> timestamps
- Fields inherited from class org.jgroups.protocols.FailureDetection
  HAS_HEADER, has_suspected_mbrs, heartbeat_sender, interval, local_addr, lock, mcast_sent, members, num_heartbeats_received, num_heartbeats_sent, num_suspect_events, suspect_history, suspected_mbrs, timeout, timeout_checker, timer
- Fields inherited from class org.jgroups.stack.Protocol
  after_creation_hook, down_prot, ergonomics, id, log, stack, stats, up_prot

Constructor Summary

Constructors
Constructor Description

FD_ALL2()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected java.lang.String`	`_printTimestamps()`
`protected java.lang.String`	`getTimeoutCheckerInfo()`
`protected long`	`getTimeoutCheckInterval()`
`protected java.util.Map<Address,?>`	`getTimestamps()`
`protected <T> boolean`	`needsToBeSuspected(Address mbr, T value)`
`java.lang.String`	`printTimestamps()`
`protected void`	`update(Address sender, boolean log_msg, boolean skip_if_exists)`

Methods inherited from class org.jgroups.protocols.FailureDetection
createTimeoutChecker, down, down, getHeartbeatsReceived, getHeartbeatsSent, getInterval, getLocalAddress, getMembers, getSuspectedMembers, getSuspectEventsSent, getTimeout, handleViewChange, init, isHeartbeatSenderRunning, isRunning, isTimeoutCheckerRunning, printSuspectHistory, resetStats, retainKeys, setInterval, setTimeout, startFailureDetection, startHeartbeatSender, startTimeoutChecker, stop, stopFailureDetection, stopHeartbeatSender, stopTimeoutChecker, suspect, unsuspect, up, up

Methods inherited from class org.jgroups.stack.Protocol
accept, afterCreationHook, destroy, enableStats, getConfigurableObjects, getDownProtocol, getDownServices, getId, getIdsAbove, getLevel, getLog, getName, getProtocolStack, getSocketFactory, getThreadFactory, getTransport, getUpProtocol, getUpServices, getValue, isErgonomics, level, parse, providedDownServices, providedUpServices, requiredDownServices, requiredUpServices, resetStatistics, setDownProtocol, setErgonomics, setId, setLevel, setProtocolStack, setSocketFactory, setUpProtocol, setValue, start, statsEnabled, up

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

timestamps

protected final java.util.Map<Address,java.util.concurrent.atomic.AtomicBoolean> timestamps

Constructor Detail
- FD_ALL2
```
public FD_ALL2()
```

Method Detail

getTimestamps
```
protected java.util.Map<Address,?> getTimestamps()
```
Specified by:

getTimestamps in class FailureDetection

getTimeoutCheckInterval
```
protected long getTimeoutCheckInterval()
```
Specified by:

getTimeoutCheckInterval in class FailureDetection

printTimestamps

public java.lang.String printTimestamps()

update

protected void update(Address sender,
                      boolean log_msg,
                      boolean skip_if_exists)

Specified by:: update in class FailureDetection

needsToBeSuspected

protected <T> boolean needsToBeSuspected(Address mbr,
                                         T value)

Specified by:: needsToBeSuspected in class FailureDetection

getTimeoutCheckerInfo
```
protected java.lang.String getTimeoutCheckerInfo()
```
Specified by:

getTimeoutCheckerInfo in class FailureDetection

_printTimestamps

protected java.lang.String _printTimestamps()