@Override
public List<String> getOnlineShardServers(boolean useCache, String cluster) {
if (useCache) {
synchronized (_onlineShardsNodes) {
Map<String, List<String>> map = _onlineShardsNodes.get();
if (map != null) {
List<String> shards = map.get(cluster);
if (shards != null) {
return shards;
}
} else {
_onlineShardsNodes.set(new ConcurrentHashMap<String, List<String>>());
watchForOnlineShardNodes(cluster);
}
}
}
LOG.info("trace getOnlineShardServers");
try {
return _zk.getChildren(
ZookeeperPathConstants.getClustersPath() + "/" + cluster + "/online/shard-nodes", false);
} catch (KeeperException e) {
throw new RuntimeException(e);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
@Override
public List<String> getClusterList() {
LOG.info("trace getClusterList");
try {
return _zk.getChildren(ZookeeperPathConstants.getClustersPath(), false);
} catch (KeeperException e) {
throw new RuntimeException(e);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
@Override
public List<String> getShardServerList(String cluster) {
LOG.debug("trace getShardServerList");
try {
return _zk.getChildren(
ZookeeperPathConstants.getClustersPath() + "/" + cluster + "/shard-nodes", false);
} catch (KeeperException e) {
throw new RuntimeException(e);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
private void watchForClusters() {
clusterWatch =
new WatchChildren(_zk, ZookeeperPathConstants.getClustersPath()).watch(new Clusters());
}