1. Reusing HttpConnection cause ResponseNotReady(see also http://stackoverflow.com/questions/3231543/python-httplib-responsenotready), fix this bug

2. Make compatible to resource manager which ha enabled
3. Add cases for new feature
4. Remove run tests in py32 py33 and add py34 py35
5. Bump version to 0.2.4

Author: tianjin.gutj

.travis.yml

@@ -7,7 +7,7 @@ script:
 env:
   - TOXENV=py26
   - TOXENV=py27
-  - TOXENV=py32
-  - TOXENV=py33
+  - TOXENV=py34
+  - TOXENV=py35
 after_success:
   coveralls

docs/conf.py

@@ -54,9 +54,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '0.2.3'
+version = '0.2.4'
 # The full version, including alpha/beta/rc tags.
-release = '0.2.3'
+release = '0.2.4'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.

setup.py

@@ -50,8 +50,8 @@ def find_version(*file_paths):
         'Operating System :: OS Independent',
         'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3.2',
-        'Programming Language :: Python :: 3.3',
+        'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.5',
         'Topic :: System :: Distributed Computing',
     ],
 )

tests/test_base.py

@@ -12,13 +12,6 @@
 
 
 class BaseYarnAPITestCase(TestCase):
-    def test_http_property_cache(self):
-        client = self.get_client()
-        http_conn1 = client.http_conn
-        http_conn2 = client.http_conn
-
-        self.assertIs(http_conn1, http_conn2)
-
     def test_request(self):
         client = self.get_client()
         with patch('yarn_api_client.base.HTTPConnection') as http_conn_mock:

tests/test_hadoop_conf.py

@@ -1,11 +1,25 @@
 # -*- coding: utf-8 -*-
 from tempfile import NamedTemporaryFile
 
+import mock
 from mock import patch
 from tests import TestCase
 
 from yarn_api_client import hadoop_conf
 
+
+_http_request_method = ''
+_http_getresponse_method = ''
+
+try:
+    from httplib import HTTPConnection, OK, NOT_FOUND
+    _http_request_method = 'httplib.HTTPConnection.request'
+    _http_getresponse_method = 'httplib.HTTPConnection.getresponse'
+except ImportError:
+    from http.client import HTTPConnection, OK, NOT_FOUND
+    _http_request_method = 'http.client.HTTPConnection.request'
+    _http_getresponse_method = 'http.client.HTTPConnection.getresponse'
+
 empty_config = '<configuration></configuration>'.encode('latin1')
 
 yarn_site_xml = """\
@@ -37,19 +51,104 @@ def test_parse(self):
             self.assertEqual(None, value)
 
     def test_get_resource_host_port(self):
+        with patch('yarn_api_client.hadoop_conf.parse') as parse_mock:
+            with patch('yarn_api_client.hadoop_conf._get_rm_ids') as get_rm_ids_mock:
+                parse_mock.return_value = 'example.com:8022'
+                get_rm_ids_mock.return_value = None
+
+                host_port = hadoop_conf.get_resource_manager_host_port()
+
+                self.assertEqual(('example.com', '8022'), host_port)
+                parse_mock.assert_called_with('/etc/hadoop/conf/yarn-site.xml',
+                                              'yarn.resourcemanager.webapp.address')
+
+                parse_mock.reset_mock()
+                parse_mock.return_value = None
+
+                host_port = hadoop_conf.get_resource_manager_host_port()
+                self.assertIsNone(host_port)
+
+    @mock.patch('yarn_api_client.hadoop_conf._get_rm_ids')
+    @mock.patch('yarn_api_client.hadoop_conf.parse')
+    @mock.patch('yarn_api_client.hadoop_conf._check_is_active_rm')
+    def test_get_resource_host_port_with_ha(self, check_is_active_rm_mock, parse_mock, get_rm_ids_mock):
+        get_rm_ids_mock.return_value = ['rm1', 'rm2']
+        parse_mock.return_value = 'example.com:8022'
+        check_is_active_rm_mock.return_value = True
+        host_port = hadoop_conf.get_resource_manager_host_port()
+
+        self.assertEqual(('example.com', '8022'), host_port)
+        parse_mock.assert_called_with('/etc/hadoop/conf/yarn-site.xml',
+                                      'yarn.resourcemanager.webapp.address.rm1')
+
+        parse_mock.reset_mock()
+        parse_mock.return_value = None
+
+        host_port = hadoop_conf.get_resource_manager_host_port()
+        self.assertIsNone(host_port)
+
+    def test_get_rm_ids(self):
+        with patch('yarn_api_client.hadoop_conf.parse') as parse_mock:
+            parse_mock.return_value = 'rm1,rm2'
+            rm_list = hadoop_conf._get_rm_ids(hadoop_conf.CONF_DIR)
+            self.assertEqual(['rm1', 'rm2'], rm_list)
+            parse_mock.assert_called_with('/etc/hadoop/conf/yarn-site.xml', 'yarn.resourcemanager.ha.rm-ids')
+
+            parse_mock.reset_mock()
+            parse_mock.return_value = None
+
+            rm_list = hadoop_conf._get_rm_ids(hadoop_conf.CONF_DIR)
+            self.assertIsNone(rm_list)
+
+    @mock.patch(_http_request_method)
+    @mock.patch(_http_getresponse_method)
+    def test_check_is_active_rm(self, http_getresponse_mock, http_conn_request_mock):
+        class ResponseMock():
+            def __init__(self, status, header_dict):
+                self.status = status
+                self.header_dict = header_dict
+
+            def getheader(self, header_key, default_return):
+                if header_key in self.header_dict:
+                    return self.header_dict[header_key]
+                else:
+                    return default_return
+
+        http_conn_request_mock.return_value = None
+        http_getresponse_mock.return_value = ResponseMock(OK, {})
+        self.assertTrue(hadoop_conf._check_is_active_rm('example2', '8022'))
+        http_getresponse_mock.reset_mock()
+        http_getresponse_mock.return_value = ResponseMock(OK, {'Refresh':"testing"})
+        self.assertFalse(hadoop_conf._check_is_active_rm('example2', '8022'))
+        http_getresponse_mock.reset_mock()
+        http_getresponse_mock.return_value = ResponseMock(NOT_FOUND, {'Refresh':"testing"})
+        self.assertFalse(hadoop_conf._check_is_active_rm('example2', '8022'))
+        http_conn_request_mock.side_effect = Exception('error')
+        http_conn_request_mock.reset_mock()
+        http_conn_request_mock.return_value = None
+        self.assertFalse(hadoop_conf._check_is_active_rm('example2', '8022'))
+        pass
+
+    def test_get_resource_manager(self):
         with patch('yarn_api_client.hadoop_conf.parse') as parse_mock:
             parse_mock.return_value = 'example.com:8022'
 
-            host_port = hadoop_conf.get_resource_manager_host_port()
+            host_port = hadoop_conf._get_resource_manager(hadoop_conf.CONF_DIR, None)
+
+            self.assertEqual(('example.com', '8022'), host_port)
+            parse_mock.assert_called_with('/etc/hadoop/conf/yarn-site.xml',
+                    'yarn.resourcemanager.webapp.address')
+
+            host_port = hadoop_conf._get_resource_manager(hadoop_conf.CONF_DIR, 'rm1')
 
             self.assertEqual(('example.com', '8022'), host_port)
             parse_mock.assert_called_with('/etc/hadoop/conf/yarn-site.xml',
-                                          'yarn.resourcemanager.webapp.address')
+                    'yarn.resourcemanager.webapp.address.rm1')
 
             parse_mock.reset_mock()
             parse_mock.return_value = None
 
-            host_port = hadoop_conf.get_resource_manager_host_port()
+            host_port = hadoop_conf._get_resource_manager(hadoop_conf.CONF_DIR, 'rm1')
             self.assertIsNone(host_port)
 
     def test_get_jobhistory_host_port(self):

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py26,py27,py32,py33
+envlist = py26,py27,py34,py35
 
 [testenv]
 deps =

yarn_api_client/__init__.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-__version__ = '0.2.3'
+__version__ = '0.2.4'
 __all__ = ['ApplicationMaster', 'HistoryServer', 'NodeManager',
            'ResourceManager']
 

yarn_api_client/base.py

@@ -30,9 +30,10 @@ def request(self, api_path, **query_args):
             path = api_path
 
         self.logger.info('Request http://%s:%s%s', self.address, self.port, path)
-        self.http_conn.request('GET', path)
-
-        response = self.http_conn.getresponse()
+        
+        http_conn = self.http_conn
+        http_conn.request('GET', path)
+        response = http_conn.getresponse()
 
         if response.status == OK:
             return self.response_class(response)
@@ -44,19 +45,13 @@ def construct_parameters(self, arguments):
         params = dict((key, value) for key, value in arguments if value is not None)
         return params
 
-
-    __http_conn = None
     @property
     def http_conn(self):
-        if self.__http_conn is None:
-            if self.address is None:
-                raise ConfigurationError('API address is not set')
-            elif self.port is None:
-                raise ConfigurationError('API port is not set')
-            self.__http_conn = HTTPConnection(self.address, self.port,
-                                              timeout=self.timeout)
-
-        return self.__http_conn
+        if self.address is None:
+            raise ConfigurationError('API address is not set')
+        elif self.port is None:
+            raise ConfigurationError('API port is not set')
+        return HTTPConnection(self.address, self.port, timeout=self.timeout)
 
     __logger = None
     @property

yarn_api_client/hadoop_conf.py

@@ -1,21 +1,64 @@
 # -*- coding: utf-8 -*-
 import os
 import xml.etree.ElementTree as ET
+try:
+    from httplib import HTTPConnection, OK
+except ImportError:
+    from http.client import HTTPConnection, OK
 
 CONF_DIR = '/etc/hadoop/conf'
 
 
-def get_resource_manager_host_port():
-    config_path = os.path.join(CONF_DIR, 'yarn-site.xml')
+def _get_rm_ids(hadoop_conf_path):
+    rm_ids = parse(os.path.join(hadoop_conf_path, 'yarn-site.xml'), 'yarn.resourcemanager.ha.rm-ids')
+    if rm_ids is not None:
+        rm_ids = rm_ids.split(',')
+    return rm_ids
+
+
+def _get_resource_manager(hadoop_conf_path, rm_id = None):
     prop_name = 'yarn.resourcemanager.webapp.address'
-    value = parse(config_path, prop_name)
-    if value is not None:
-        host, _, port = value.partition(':')
-        return host, port
+    if rm_id is not None:
+        rm_webapp_address = parse(os.path.join(hadoop_conf_path, 'yarn-site.xml'), '%s.%s' % (prop_name, rm_id))
+    else:
+        rm_webapp_address = parse(os.path.join(hadoop_conf_path, 'yarn-site.xml'), prop_name)
+    if rm_webapp_address is not None:
+        [host, port] = rm_webapp_address.split(':')
+        return (host, port)
     else:
         return None
 
 
+def _check_is_active_rm(rm_web_host, rm_web_port):
+    conn = HTTPConnection(rm_web_host, rm_web_port)
+    try:
+        conn.request('GET', '/cluster')
+    except:
+        return False
+    response = conn.getresponse()
+    if response.status != OK:
+        return False
+    else:
+        if response.getheader('Refresh', None) is not None:
+            return False
+        return True
+
+
+def get_resource_manager_host_port():
+    hadoop_conf_path = CONF_DIR
+    rm_ids = _get_rm_ids(hadoop_conf_path)
+    if rm_ids is not None:
+        for rm_id in rm_ids:
+            ret = _get_resource_manager(hadoop_conf_path, rm_id)
+            if ret is not None:
+                (host, port) = ret
+                if _check_is_active_rm(host, port):
+                    return host, port
+        return None
+    else:
+        return _get_resource_manager(hadoop_conf_path, None)
+
+
 def get_jobhistory_host_port():
     config_path = os.path.join(CONF_DIR, 'mapred-site.xml')
     prop_name = 'mapreduce.jobhistory.webapp.address'