} else {
LOG.error("Resource " + resourceId + " does not have a valid provisioner class!");
break;
}
}
TargetProvider targetProvider = _targetProviderMap.get(resourceId);
ContainerProvider containerProvider = _containerProviderMap.get(resourceId);
final Cluster cluster = event.getAttribute("Cluster");
final ClusterDataCache cache = event.getAttribute("ClusterDataCache");
final Collection<Participant> participants = cluster.getParticipantMap().values();
// If a process died, we need to mark it as DISCONNECTED or if the process is ready, mark as
// CONNECTED
Map<ParticipantId, Participant> participantMap = cluster.getParticipantMap();
for (ParticipantId participantId : participantMap.keySet()) {
Participant participant = participantMap.get(participantId);
ContainerConfig config = participant.getContainerConfig();
if (config != null) {
ContainerState containerState = config.getState();
if (!participant.isAlive() && ContainerState.CONNECTED.equals(containerState)) {
// Need to mark as disconnected if process died
LOG.info("Participant " + participantId + " died, marking as DISCONNECTED");
updateContainerState(cache, accessor, keyBuilder, cluster, null, participantId,
ContainerState.DISCONNECTED);
} else if (participant.isAlive() && ContainerState.CONNECTING.equals(containerState)) {
// Need to mark as connected only when the live instance is visible
LOG.info("Participant " + participantId + " is ready, marking as CONNECTED");
updateContainerState(cache, accessor, keyBuilder, cluster, null, participantId,
ContainerState.CONNECTED);
} else if (!participant.isAlive() && ContainerState.HALTING.equals(containerState)) {
// Need to mark as connected only when the live instance is visible
LOG.info("Participant " + participantId + " is has been killed, marking as HALTED");
updateContainerState(cache, accessor, keyBuilder, cluster, null, participantId,
ContainerState.HALTED);
}
}
}
// Participants registered in helix
// Give those participants to targetprovider
// Provide the response that contains, new containerspecs, containers to be released,
// containers to be stopped
// call the respective provisioner to allocate and start the container.
// Each container is then started its state is changed from any place.
// The target provider is given the state of container and asked for its new state. For each
// state there is a corresponding handler function.
// TargetProvider should be stateless, given the state of cluster and existing participants
// it should return the same result
final TargetProviderResponse response =
targetProvider.evaluateExistingContainers(cluster, resourceId, participants);
// allocate new containers
for (final ContainerSpec spec : response.getContainersToAcquire()) {
final ParticipantId participantId = spec.getParticipantId();
if (!cluster.getParticipantMap().containsKey(participantId)) {