com.sleepycat.je.rep.impl.networkRestore

Class FeederManager

java.lang.Object

java.lang.Thread

com.sleepycat.je.utilint.StoppableThread

com.sleepycat.je.rep.impl.networkRestore.FeederManager

All Implemented Interfaces:

Runnable

public class FeederManager
extends StoppableThread

Manages the multiple log file feeders that may be servicing requests from multiple clients requesting log files.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

Thread.State, Thread.UncaughtExceptionHandler

Field Summary

Fields

Modifier and Type	Field and Description
static String	FEEDER_SERVICE
int	leaseRenewalCount

Fields inherited from class com.sleepycat.je.utilint.StoppableThread

envImpl

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors

Constructor and Description
FeederManager(ServiceDispatcher serviceDispatcher, EnvironmentImpl envImpl, NameIdPair nameIdPair) Creates a FeederManager but does not start it.

Method Summary

Modifier and Type	Method and Description
void	clearedCachedFileChecksum(String fileName) Clears the cached checksum for a file when it may be overwritten (e.g., entries may be erased).
int	getActiveFeederCount() Returns the number of feeders that are currently active with this node.
int	getLeaseCount() Returns the number of leases that are currently outstanding.
long	getLeaseDuration()
int	getLeaseRenewalCount() Returns the number of times the lease was actually renewed.
protected Logger	getLogger()
protected int	initiateSoftShutdown() Threads that use shutdownThread() must define this method.
void	run() The dispatcher method that starts up new log file feeders.
void	setLeaseDuration(long leaseDuration)
void	shutdown()

Methods inherited from class com.sleepycat.je.utilint.StoppableThread

cleanup, getSavedShutdownException, getTotalCpuTime, getTotalUserTime, handleUncaughtException, isShutdown, saveShutdownException, shutdownDone, shutdownThread

Methods inherited from class java.lang.Thread

activeCount, checkAccess, clone, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Field Detail

leaseRenewalCount

public int leaseRenewalCount

FEEDER_SERVICE

public static final String FEEDER_SERVICE

See Also:

Constant Field Values

Constructor Detail

FeederManager

public FeederManager(ServiceDispatcher serviceDispatcher,
                     EnvironmentImpl envImpl,
                     NameIdPair nameIdPair)

Creates a FeederManager but does not start it.

Parameters:

serviceDispatcher - The service dispatcher with which the FeederManager must register itself. It's null only in a test environment.

nameIdPair - The node name and id associated with the feeder

envImpl - the environment that will provide the log files

Method Detail

getLeaseRenewalCount

public int getLeaseRenewalCount()

Returns the number of times the lease was actually renewed.

getLeaseCount

public int getLeaseCount()

Returns the number of leases that are currently outstanding.

getActiveFeederCount

public int getActiveFeederCount()

Returns the number of feeders that are currently active with this node. Note that active leases are included in this count, since it's expected that the clients will try to reconnect.

getLeaseDuration

public long getLeaseDuration()

setLeaseDuration

public void setLeaseDuration(long leaseDuration)

clearedCachedFileChecksum

public void clearedCachedFileChecksum(String fileName)

Clears the cached checksum for a file when it may be overwritten (e.g., entries may be erased).

run

public void run()

The dispatcher method that starts up new log file feeders.

Specified by:

run in interface Runnable

Overrides:

run in class Thread

shutdown

public void shutdown()

initiateSoftShutdown

protected int initiateSoftShutdown()

Description copied from class: StoppableThread

Threads that use shutdownThread() must define this method. It's invoked by shutdownThread as an attempt at a soft shutdown. This method makes provisions for this thread to exit on its own. The technique used to make the thread exit can vary based upon the nature of the service being provided by the thread. For example, the thread may be known to poll some shutdown flag on a periodic basis, or it may detect that a channel that it waits on has been closed by this method.

Overrides:

initiateSoftShutdown in class StoppableThread

Returns:

the amount of time in ms that the shutdownThread method will wait for the thread to exit. A -ve value means that the method will not wait. A zero value means it will wait indefinitely.

getLogger

protected Logger getLogger()

Specified by:

getLogger in class StoppableThread

Returns:

a logger to use when logging uncaught exceptions.

See Also:

StoppableThread.getLogger()