public class SlaveMonitor
extends java.lang.Object
The SlaveMonitor manages slave connections to each remote slave, and provides synchronization facilities for the slave connections and for various other objects waiting to be notified when new slaves are available, space is available in a slave's job queue, an individual has been completed, etc.
The monitor provides functions to create and delete slaves (registerSlave(), unregisterSlave()), schedule a job for evaluation (scheduleJobForEvaluation(...)), block until all jobs have completed (waitForAllSlavesToFinishEvaluating(...)), test if any individual in a job has been finished (evaluatedIndividualAvailable()), and block until an individual in a job is available and returned (waitForindividual()).
Generally speaking, the SlaveMonitor owns the SlaveConnections -- no one else should speak to them. Also generally speaking, only MasterProblems create and speak to the SlaveMonitor.
Modifier and Type | Field and Description |
---|---|
static java.lang.String |
P_EVALCOMPRESSION |
static java.lang.String |
P_EVALMASTERPORT |
static java.lang.String |
P_MAXIMUMNUMBEROFCONCURRENTJOBSPERSLAVE |
static java.lang.String |
P_RESCHEDULELOSTJOBS |
static int |
SEED_INCREMENT |
java.net.ServerSocket |
servSock
The socket where slaves connect.
|
EvolutionState |
state |
boolean |
useCompression
Indicates whether compression is used over the socket IO streams.
|
Constructor and Description |
---|
SlaveMonitor(EvolutionState state,
boolean showDebugInfo,
MasterProblem problemPrototype)
Simple constructor that initializes the data structures for keeping track of the state of each slave.
|
Modifier and Type | Method and Description |
---|---|
boolean |
evaluatedIndividualAvailable() |
void |
notifyMonitor(java.lang.Object monitor) |
boolean |
registerSlave(EvolutionState state,
java.lang.String name,
java.net.Socket socket,
java.io.DataOutputStream out,
java.io.DataInputStream in)
Registers a new slave with the monitor.
|
void |
scheduleJobForEvaluation(EvolutionState state,
Job job)
Schedules a job for execution on one of the available slaves.
|
void |
shutdown()
Shuts down the slave monitor (also shuts down all slaves).
|
void |
unregisterSlave(ec.eval.SlaveConnection slave)
Unregisters a dead slave from the monitor.
|
void |
waitForAllSlavesToFinishEvaluating(EvolutionState state)
This method returns only when all slaves have finished the jobs that they were assigned.
|
QueueIndividual |
waitForIndividual()
Blocks until an individual comes available
|
boolean |
waitOnMonitor(java.lang.Object monitor) |
public static final java.lang.String P_EVALMASTERPORT
public static final java.lang.String P_EVALCOMPRESSION
public static final java.lang.String P_MAXIMUMNUMBEROFCONCURRENTJOBSPERSLAVE
public static final java.lang.String P_RESCHEDULELOSTJOBS
public static final int SEED_INCREMENT
public EvolutionState state
public java.net.ServerSocket servSock
public boolean useCompression
public SlaveMonitor(EvolutionState state, boolean showDebugInfo, MasterProblem problemPrototype)
public boolean waitOnMonitor(java.lang.Object monitor)
public void notifyMonitor(java.lang.Object monitor)
public boolean registerSlave(EvolutionState state, java.lang.String name, java.net.Socket socket, java.io.DataOutputStream out, java.io.DataInputStream in)
public void unregisterSlave(ec.eval.SlaveConnection slave)
public void shutdown()
public void scheduleJobForEvaluation(EvolutionState state, Job job)
public void waitForAllSlavesToFinishEvaluating(EvolutionState state)
public boolean evaluatedIndividualAvailable()
public QueueIndividual waitForIndividual()