Merge branch 'ipv6'

[nodemanager.git] / logger.py

diff --git a/logger.py b/logger.py
index c4f6ce6..b38c872 100644 (file)
--- a/logger.py
+++ b/logger.py
@@ -1,5 +1,3 @@
-# $Id$
-# $URL$
 
 """A very simple logger that tries to be concurrency-safe."""
 
@@ -9,21 +7,24 @@ import traceback
 import subprocess
 import select
 
-LOG_FILE = '/var/log/nm'
-LOG_SLIVERS = '/var/log/getslivers.txt'
+LOG_FILE    = '/var/log/nodemanager'
+LOG_SLIVERS = '/var/lib/nodemanager/getslivers.txt'
+LOG_DATABASE = '/var/lib/nodemanager/database.txt'
 
-# Thierry - trying to debug this for 4.2
 # basically define 3 levels
 LOG_NONE=0
 LOG_NODE=1
 LOG_VERBOSE=2
 # default is to log a reasonable amount of stuff for when running on operational nodes
-LOG_LEVEL=1
+LOG_LEVEL=LOG_NODE
 
 def set_level(level):
     global LOG_LEVEL
-    assert level in [LOG_NONE,LOG_NODE,LOG_VERBOSE]
-    LOG_LEVEL=level
+    try:
+        assert level in [LOG_NONE,LOG_NODE,LOG_VERBOSE]
+        LOG_LEVEL=level
+    except:
+        logger.log("Failed to set LOG_LEVEL to %s"%level)
 
 def verbose(msg):
     log('(v) '+msg,LOG_VERBOSE)
@@ -41,12 +42,25 @@ def log(msg,level=LOG_NODE):
         sys.stderr.write(msg)
         sys.stderr.flush()
 
+date_width=24
 def log_exc(msg="",name=None):
-    """Log the traceback resulting from an exception."""
-    if name: 
-        log("%s: EXCEPTION caught <%s> \n %s" %(name, msg, traceback.format_exc()))
-    else:
-        log("EXCEPTION caught <%s> \n %s" %(msg, traceback.format_exc()))
+    """Log traceback resulting from an exception."""
+    printout=""
+    if name: printout += "%s: "%name
+    printout += "EXCEPTION caught <%s> \n" %msg
+    for frame in traceback.format_exc().split("\n"):
+        printout+=(date_width+2)*" "+"%s\n"%frame
+    log(printout)
+
+def log_trace(msg="",name=None):
+    """Log current stack"""
+    printout=""
+    if name: printout += "%s: "%name
+    printout += "LOGTRACE\n"
+    for frame in traceback.format_stack():
+        printout += "..."+frame
+    log(printout)
+
 
 ########## snapshot data to a file
 # for some reason the various modules are still triggered even when the
@@ -55,7 +69,9 @@ def log_exc(msg="",name=None):
 def log_missing_data (msg,key):
     log("%s: could not find the %s key in data (PLC connection down?) - IGNORED"%(msg,key))
 
-def log_data_in_file (data, file, message=""):
+def log_data_in_file (data, file, message="",level=LOG_NODE):
+    if (level > LOG_LEVEL):
+        return
     import pprint, time
     try:
         f=open(file,'w')
@@ -65,21 +81,24 @@ def log_data_in_file (data, file, message=""):
         pp=pprint.PrettyPrinter(stream=f,indent=2)
         pp.pprint(data)
         f.close()
+        verbose("logger:.log_data_in_file Owerwrote %s"%file)
     except:
-        log_verbose('log_data_in_file failed - file=%s - message=%r'%(file,message))
+        log_exc('logger.log_data_in_file failed - file=%s - message=%r'%(file,message))
 
 def log_slivers (data):
     log_data_in_file (data, LOG_SLIVERS, "raw GetSlivers")
+def log_database (db):
+    log_data_in_file (db, LOG_DATABASE, "raw database")
 
 #################### child processes
-# avoid waiting until the process returns; 
+# avoid waiting until the process returns;
 # that makes debugging of hanging children hard
 
 class Buffer:
     def __init__ (self,message='log_call: '):
         self.buffer=''
         self.message=message
-        
+
     def add (self,c):
         self.buffer += c
         if c=='\n': self.flush()
@@ -92,14 +111,16 @@ class Buffer:
 # time out in seconds - avoid hanging subprocesses - default is 5 minutes
 default_timeout_minutes=5
 
+# returns a bool that is True when everything goes fine and the retcod is 0
 def log_call(command,timeout=default_timeout_minutes*60,poll=1):
     message=" ".join(command)
     log("log_call: running command %s" % message)
     verbose("log_call: timeout=%r s" % timeout)
     verbose("log_call: poll=%r s" % poll)
     trigger=time.time()+timeout
-    try: 
-        child = subprocess.Popen(command, bufsize=1, 
+    result = False
+    try:
+        child = subprocess.Popen(command, bufsize=1,
                                  stdout=subprocess.PIPE, stderr=subprocess.STDOUT, close_fds=True)
         buffer = Buffer()
         while True:
@@ -112,17 +133,19 @@ def log_call(command,timeout=default_timeout_minutes*60,poll=1):
             if returncode != None:
                 buffer.flush()
                 # child is done and return 0
-                if returncode == 0: 
-                    log("log_call: command completed (%s)" % message)
+                if returncode == 0:
+                    log("log_call:end command (%s) completed" % message)
+                    result=True
                     break
                 # child has failed
                 else:
-                    log("log_call: command return=%d (%s)" %(returncode,message))
-                    raise Exception("log_call: failed with returncode %d"%returncode)
+                    log("log_call:end command (%s) returned with code %d" %(message,returncode))
+                    break
             # no : still within timeout ?
             if time.time() >= trigger:
                 buffer.flush()
                 child.terminate()
-                raise Exception("log_call: terminated command - exceeded timeout %d s"%timeout)
+                log("log_call:end terminating command (%s) - exceeded timeout %d s"%(message,timeout))
+                break
     except: log_exc("failed to run command %s" % message)
-
+    return result