X-Git-Url: https://code.grnet.gr/git/ganeti-local/blobdiff_plain/fad50141719e1f8e0525265e62ceb09e0ce5efb4..8ee4dc80c0669b7c64c69d8a17aa7f52781910ce:/lib/luxi.py

diff --git a/lib/luxi.py b/lib/luxi.py
index f99a435..7ade2b5 100644
--- a/lib/luxi.py
+++ b/lib/luxi.py
@@ -31,20 +31,30 @@ The module is also be used by the master daemon.
 
 import socket
 import collections
-import simplejson
 import time
 import errno
 
-from ganeti import opcodes
 from ganeti import serializer
 from ganeti import constants
-
-
-KEY_REQUEST = 'request'
-KEY_DATA = 'data'
-REQ_SUBMIT = 'submit'
-REQ_ABORT = 'abort'
-REQ_QUERY = 'query'
+from ganeti import errors
+
+
+KEY_METHOD = 'method'
+KEY_ARGS = 'args'
+KEY_SUCCESS = "success"
+KEY_RESULT = "result"
+
+REQ_SUBMIT_JOB = "SubmitJob"
+REQ_WAIT_FOR_JOB_CHANGE = "WaitForJobChange"
+REQ_CANCEL_JOB = "CancelJob"
+REQ_ARCHIVE_JOB = "ArchiveJob"
+REQ_AUTOARCHIVE_JOBS = "AutoArchiveJobs"
+REQ_QUERY_JOBS = "QueryJobs"
+REQ_QUERY_INSTANCES = "QueryInstances"
+REQ_QUERY_NODES = "QueryNodes"
+REQ_QUERY_EXPORTS = "QueryExports"
+REQ_QUERY_CONFIG_VALUES = "QueryConfigValues"
+REQ_QUEUE_SET_DRAIN_FLAG = "SetDrainFlag"
 
 DEF_CTMO = 10
 DEF_RWTO = 60
@@ -82,6 +92,7 @@ class RequestError(ProtocolError):
 
   """
 
+
 class NoMasterError(ProtocolError):
   """The master cannot be reached
 
@@ -91,24 +102,6 @@ class NoMasterError(ProtocolError):
   """
 
 
-def SerializeJob(job):
-  """Convert a job description to a string format.
-
-  """
-  return simplejson.dumps(job.__getstate__())
-
-
-def UnserializeJob(data):
-  """Load a job from a string format"""
-  try:
-    new_data = simplejson.loads(data)
-  except Exception, err:
-    raise DecodingError("Error while unserializing: %s" % str(err))
-  job = opcodes.Job()
-  job.__setstate__(new_data)
-  return job
-
-
 class Transport:
   """Low-level transport class.
 
@@ -165,7 +158,7 @@ class Transport:
       except socket.timeout, err:
         raise TimeoutError("Connect timed out: %s" % str(err))
       except socket.error, err:
-        if err.args[0] == errno.ENOENT:
+        if err.args[0] in (errno.ENOENT, errno.ECONNREFUSED):
           raise NoMasterError((address,))
         raise
       self.socket.settimeout(self._rwtimeout)
@@ -261,39 +254,84 @@ class Client(object):
       address = constants.MASTER_SOCKET
     self.transport = transport(address, timeouts=timeouts)
 
-  def SendRequest(self, request, data):
+  def CallMethod(self, method, args):
     """Send a generic request and return the response.
 
     """
-    msg = {KEY_REQUEST: request, KEY_DATA: data}
-    result = self.transport.Call(serializer.DumpJson(msg, indent=False))
+    # Build request
+    request = {
+      KEY_METHOD: method,
+      KEY_ARGS: args,
+      }
+
+    # Send request and wait for response
+    result = self.transport.Call(serializer.DumpJson(request, indent=False))
     try:
       data = serializer.LoadJson(result)
     except Exception, err:
       raise ProtocolError("Error while deserializing response: %s" % str(err))
+
+    # Validate response
     if (not isinstance(data, dict) or
-        'success' not in data or
-        'result' not in data):
+        KEY_SUCCESS not in data or
+        KEY_RESULT not in data):
       raise DecodingError("Invalid response from server: %s" % str(data))
-    return data
-
-  def SubmitJob(self, job):
-    """Submit a job"""
-    result = self.SendRequest(REQ_SUBMIT, SerializeJob(job))
-    if not result['success']:
-      raise RequestError(result['result'])
-    return result['result']
-
-  def Query(self, data):
-    """Make a query"""
-    result = self.SendRequest(REQ_QUERY, data)
-    if not result['success']:
-      raise RequestError(result[result])
-    result = result['result']
-    if data["object"] == "jobs":
-      # custom job processing of query values
-      for row in result:
-        for idx, field in enumerate(data["fields"]):
-          if field == "op_list":
-            row[idx] = [opcodes.OpCode.LoadOpCode(i) for i in row[idx]]
+
+    result = data[KEY_RESULT]
+
+    if not data[KEY_SUCCESS]:
+      # TODO: decide on a standard exception
+      if (isinstance(result, (tuple, list)) and len(result) == 2 and
+          isinstance(result[1], (tuple, list))):
+        # custom ganeti errors
+        err_class = errors.GetErrorClass(result[0])
+        if err_class is not None:
+          raise err_class, tuple(result[1])
+
+      raise RequestError(result)
+
     return result
+
+  def SetQueueDrainFlag(self, drain_flag):
+    return self.CallMethod(REQ_QUEUE_SET_DRAIN_FLAG, drain_flag)
+
+  def SubmitJob(self, ops):
+    ops_state = map(lambda op: op.__getstate__(), ops)
+    return self.CallMethod(REQ_SUBMIT_JOB, ops_state)
+
+  def CancelJob(self, job_id):
+    return self.CallMethod(REQ_CANCEL_JOB, job_id)
+
+  def ArchiveJob(self, job_id):
+    return self.CallMethod(REQ_ARCHIVE_JOB, job_id)
+
+  def AutoArchiveJobs(self, age):
+    return self.CallMethod(REQ_AUTOARCHIVE_JOBS, age)
+
+  def WaitForJobChange(self, job_id, fields, prev_job_info, prev_log_serial):
+    timeout = (DEF_RWTO - 1) / 2
+    while True:
+      result = self.CallMethod(REQ_WAIT_FOR_JOB_CHANGE,
+                               (job_id, fields, prev_job_info,
+                                prev_log_serial, timeout))
+      if result != constants.JOB_NOTCHANGED:
+        break
+    return result
+
+  def QueryJobs(self, job_ids, fields):
+    return self.CallMethod(REQ_QUERY_JOBS, (job_ids, fields))
+
+  def QueryInstances(self, names, fields):
+    return self.CallMethod(REQ_QUERY_INSTANCES, (names, fields))
+
+  def QueryNodes(self, names, fields):
+    return self.CallMethod(REQ_QUERY_NODES, (names, fields))
+
+  def QueryExports(self, nodes):
+    return self.CallMethod(REQ_QUERY_EXPORTS, nodes)
+
+  def QueryConfigValues(self, fields):
+    return self.CallMethod(REQ_QUERY_CONFIG_VALUES, fields)
+
+
+# TODO: class Server(object)