private static FsPath ParameterOrConfigured(FsPath path, Configuration config, ConfigOption <string> option)
{
if (path != null)
{
return(path);
}
var configValue = config.GetString(option);
try
{
return(configValue == null ? null : new FsPath(configValue));
}
catch (IllegalArgumentException)
{
throw new IllegalConfigurationException("Cannot parse value for " + option.Key +
" : " + configValue + " . Not a valid path.");
}
}
private static FsPath ValidatePath(FsPath path)
{
var scheme = path.Scheme;
var pathPart = path.Path;
// some validity checks
if (scheme == null)
{
throw new IllegalArgumentException("The scheme (hdfs://, file://, etc) is null. " +
"Please specify the file system scheme explicitly in the URI.");
}
if (pathPart == null)
{
throw new IllegalArgumentException("The path to store the checkpoint data in is null. " +
"Please specify a directory path for the checkpoint data.");
}
if (pathPart.Length == 0 || pathPart.Equals("/"))
{
throw new IllegalArgumentException("Cannot use the root directory for checkpoints.");
}
return(path);
}
protected AbstractFileStateBackend(FsPath baseCheckpointPath, FsPath baseSavepointPath, Configuration configuration)
{
BaseCheckpointPath = baseCheckpointPath == null ? null : ParameterOrConfigured(baseCheckpointPath, configuration, CheckpointingOptions.CheckpointsDirectory);
BaseSavepointPath = baseSavepointPath == null ? null : ValidatePath(baseSavepointPath);
}
/// <summary>
/// Creates a backend with the given optional checkpoint- and savepoint base directories.
/// </summary>
/// <param name="baseCheckpointPath">The base directory for checkpoints, or null, if none is configured.</param>
/// <param name="baseSavepointPath">The default directory for savepoints, or null, if none is set.</param>
protected AbstractFileStateBackend(FsPath baseCheckpointPath = default, FsPath baseSavepointPath = default)
{
BaseCheckpointPath = baseCheckpointPath == null ? null : ValidatePath(baseCheckpointPath);
BaseSavepointPath = baseSavepointPath == null ? null : ValidatePath(baseSavepointPath);
}