/**
* Returns the time when this computer last became idle.
*
* <p>If this computer is already idle, the return value will point to the time in the past since
* when this computer has been idle.
*
* <p>If this computer is busy, the return value will point to the time in the future where this
* computer will be expected to become free.
*/
public final long getIdleStartMilliseconds() {
long firstIdle = Long.MIN_VALUE;
for (Executor e : oneOffExecutors) {
firstIdle = Math.max(firstIdle, e.getIdleStartMilliseconds());
}
for (Executor e : executors) {
firstIdle = Math.max(firstIdle, e.getIdleStartMilliseconds());
}
return firstIdle;
}
/** Decrease the count of slaves being "provisioned". */
private void decrementAmiSlaveProvision(String ami) {
synchronized (provisioningAmis) {
int currentProvisioning;
try {
currentProvisioning = provisioningAmis.get(ami);
} catch (NullPointerException npe) {
return;
}
provisioningAmis.put(ami, Math.max(currentProvisioning - 1, 0));
}
}