private class ApplyRivers implements RiverClusterStateListener {
@Override
public void riverClusterChanged(RiverClusterChangedEvent event) {
DiscoveryNode localNode = clusterService.localNode();
RiverClusterState state = event.state();
// first, go over and delete ones that either don't exists or are not allocated
for (final RiverName riverName : rivers.keySet()) {
RiverRouting routing = state.routing().routing(riverName);
if (routing == null || !localNode.equals(routing.node())) {
// not routed at all, and not allocated here, clean it (we delete the relevant ones before)
closeRiver(riverName);
// also, double check and delete the river content if it was deleted (_meta does not exists)
try {
client.prepareGet(riverIndexName, riverName.name(), "_meta").setListenerThreaded(true).execute(new ActionListener<GetResponse>() {
@Override
public void onResponse(GetResponse getResponse) {
if (!getResponse.isExists()) {
// verify the river is deleted
client.admin().indices().prepareDeleteMapping(riverIndexName).setType(riverName.name()).execute(new ActionListener<DeleteMappingResponse>() {
@Override
public void onResponse(DeleteMappingResponse deleteMappingResponse) {
// all is well...
}
@Override
public void onFailure(Throwable e) {
logger.debug("failed to (double) delete river [{}] content", e, riverName.name());
}
});
}
}
@Override
public void onFailure(Throwable e) {
logger.debug("failed to (double) delete river [{}] content", e, riverName.name());
}
});
} catch (IndexMissingException e) {
// all is well, the _river index was deleted
} catch (Exception e) {
logger.warn("unexpected failure when trying to verify river [{}] deleted", e, riverName.name());
}
}
}
for (final RiverRouting routing : state.routing()) {
// not allocated
if (routing.node() == null) {
logger.trace("river {} has no routing node", routing.riverName().getName());
continue;
}