App Engine Python SDK  v1.6.9 rev.445
The Python runtime is available as an experimental Preview feature.
Public Member Functions | Public Attributes | Static Public Attributes | List of all members
google.appengine.ext.mapreduce.input_readers.NamespaceInputReader Class Reference
Inheritance diagram for google.appengine.ext.mapreduce.input_readers.NamespaceInputReader:
google.appengine.ext.mapreduce.input_readers.InputReader google.appengine.ext.mapreduce.json_util.JsonMixin

Public Member Functions

def __init__
 
def to_json
 
def from_json
 
def validate
 
def split_input
 
def __iter__
 
def __str__
 
- Public Member Functions inherited from google.appengine.ext.mapreduce.input_readers.InputReader
def __iter__
 
def next
 
def from_json
 
def to_json
 
def split_input
 
def validate
 
- Public Member Functions inherited from google.appengine.ext.mapreduce.json_util.JsonMixin
def to_json_str
 
def from_json_str
 

Public Attributes

 ns_range
 

Static Public Attributes

string NAMESPACE_RANGE_PARAM = "namespace_range"
 
string BATCH_SIZE_PARAM = "batch_size"
 
- Static Public Attributes inherited from google.appengine.ext.mapreduce.input_readers.InputReader
 expand_parameters = False
 
string NAMESPACE_PARAM = "namespace"
 
string NAMESPACES_PARAM = "namespaces"
 

Detailed Description

An input reader to iterate over namespaces.

This reader yields namespace names as string.
It will always produce only one shard.

Member Function Documentation

def google.appengine.ext.mapreduce.input_readers.NamespaceInputReader.from_json (   cls,
  json 
)
Create new DatastoreInputReader from the json, encoded by to_json.

Args:
  json: json map representation of DatastoreInputReader.

Returns:
  an instance of DatastoreInputReader with all data deserialized from json.
def google.appengine.ext.mapreduce.input_readers.NamespaceInputReader.split_input (   cls,
  mapper_spec 
)
Returns a list of input readers for the input spec.

Args:
  mapper_spec: The MapperSpec for this InputReader.

Returns:
  A list of InputReaders.
def google.appengine.ext.mapreduce.input_readers.NamespaceInputReader.to_json (   self)
Serializes all the data in this query range into json form.

Returns:
  all the data in json-compatible map.
def google.appengine.ext.mapreduce.input_readers.NamespaceInputReader.validate (   cls,
  mapper_spec 
)
Validates mapper spec.

Args:
  mapper_spec: The MapperSpec for this InputReader.

Raises:
  BadReaderParamsError: required parameters are missing or invalid.

The documentation for this class was generated from the following file: