public async Task <ResourcesZnode> GetResourcesAsync(Watcher childWatcher, Watcher dataWatcher)
{
var actionToPerform = "get the list of resources";
while (true)
{
await BlockUntilConnected(actionToPerform);
try
{
DataResult dataResult = null;
if (dataWatcher != null)
{
dataResult = await this.zookeeper.getDataAsync(this.resourcesPath, dataWatcher);
}
else
{
dataResult = await this.zookeeper.getDataAsync(this.resourcesPath);
}
ChildrenResult childrenResult = null;
if (childWatcher != null)
{
childrenResult = await this.zookeeper.getChildrenAsync(this.resourcesPath, childWatcher);
}
else
{
childrenResult = await this.zookeeper.getChildrenAsync(this.resourcesPath);
}
var resourcesZnodeData = JSONSerializer <ResourcesZnodeData> .DeSerialize(
System.Text.Encoding.UTF8.GetString(dataResult.Data));
if (resourcesZnodeData == null)
{
resourcesZnodeData = new ResourcesZnodeData();
}
return(new ResourcesZnode()
{
ResourceAssignments = resourcesZnodeData,
Resources = childrenResult.Children,
Version = dataResult.Stat.getVersion()
});
}
catch (KeeperException.NoNodeException e)
{
throw new ZkInvalidOperationException(
$"Could not {actionToPerform} as the resources node does not exist.", e);
}
catch (KeeperException.ConnectionLossException)
{
// do nothing, the next iteration will try again
}
catch (KeeperException.SessionExpiredException e)
{
throw new ZkSessionExpiredException($"Could not {actionToPerform} as the session has expired: ", e);
}
catch (Exception e)
{
throw new ZkInvalidOperationException($"Could not {actionToPerform} due to an unexpected error", e);
}
}
}
public ResourcesZnode()
{
ResourceAssignments = new ResourcesZnodeData();
}