Help needed regarding Assertion Error

Hi all,
Iam new to using weblogic.Iam using weblogic 5.1.Iam trying to develop a BMP.I
have a separate class for the primary key.I have implemented the equals and hashcode
methods as follows :
public boolean equals(Object o){
if (o instanceof PartitaPrenotataPK) {
PartitaPrenotataPK otherKey = PartitaPrenotataPK)o;
try {
boolean result =(utc.isUguale(otherKey.utc) && (contoCash.equals(otherKey.contoCash)));
System.out.println("RESULT IS : " + result);
return result;
} catch (Exception e) {
e.printStackTrace();
return false;
} else
return false;
the hashcode method :
public int hashCode() {
if (-1 == m_hashCode) {
m_hashCode = utc.hashCode() ^ contoCash.hashCode();
System.out.println("HASH CODE RESULT " + m_hashCode);
return m_hashCode;
Iam getting an Assertion error.What actually is an Assertion error.The stack trace
is :
weblogic.utils.AssertionError: ***** ASSERTION FAILED *****[ *** The EJB Lock
Manager has detectected that the implementation of:
public int hashCode();
or
public boolean equals(Object o);
in the class: it.sella.finanza.gestione_partite_prenotate.pphosthandler.PartitaPrenotataPK
is incorrect.
at weblogic.ejb.internal.LockManagerImpl.unlock(LockManagerImpl.java:187)
at weblogic.ejb.internal.StatefulEJBCache.unbind(StatefulEJBCache.java:555)
at weblogic.ejb.internal.StatefulEJBCache.releaseEJBContext(StatefulEJBCache.java:361)
at weblogic.ejb.internal.StatefulEJBHome.findOrCreateEJBObject(StatefulEJBHome.java:279)
at weblogic.ejb.internal.StatefulEJBHome.findOrCreateEJBObject(StatefulEJBHome.java:258)
at

There was a bug where this AssertionError was fired incorrectly. You
may wish to ensure you have the latest 5.1 service pack.
Otherwise, you'll have to show me your full pk class for me to tell you
if your equals and hashCode are implemented correctly.
-- Rob
chandrasekar wrote:
Hi all,
Iam new to using weblogic.Iam using weblogic 5.1.Iam trying to develop a BMP.I
have a separate class for the primary key.I have implemented the equals and hashcode
methods as follows :
public boolean equals(Object o){
if (o instanceof PartitaPrenotataPK) {
PartitaPrenotataPK otherKey = PartitaPrenotataPK)o;
try {
boolean result =(utc.isUguale(otherKey.utc) && (contoCash.equals(otherKey.contoCash)));
System.out.println("RESULT IS : " + result);
return result;
} catch (Exception e) {
e.printStackTrace();
return false;
} else
return false;
the hashcode method :
public int hashCode() {
if (-1 == m_hashCode) {
m_hashCode = utc.hashCode() ^ contoCash.hashCode();
System.out.println("HASH CODE RESULT " + m_hashCode);
return m_hashCode;
Iam getting an Assertion error.What actually is an Assertion error.The stack trace
is :
weblogic.utils.AssertionError: ***** ASSERTION FAILED *****[ *** The EJB Lock
Manager has detectected that the implementation of:
public int hashCode();
or
public boolean equals(Object o);
in the class: it.sella.finanza.gestione_partite_prenotate.pphosthandler.PartitaPrenotataPK
is incorrect.
at weblogic.ejb.internal.LockManagerImpl.unlock(LockManagerImpl.java:187)
at weblogic.ejb.internal.StatefulEJBCache.unbind(StatefulEJBCache.java:555)
at weblogic.ejb.internal.StatefulEJBCache.releaseEJBContext(StatefulEJBCache.java:361)
at weblogic.ejb.internal.StatefulEJBHome.findOrCreateEJBObject(StatefulEJBHome.java:279)
at weblogic.ejb.internal.StatefulEJBHome.findOrCreateEJBObject(StatefulEJBHome.java:258)
at

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Have the following code (Haven't written it my self and don't know much about how it does what it's supposed to do.):
#!/usr/bin/python
import sys
import os
import re
import logging
import json
if sys.version_info < (3, 0):
from urllib2 import Request
from urllib2 import urlopen
from urlparse import urlparse
else:
from urllib.request import Request
from urllib.request import urlopen
from urllib.parse import urlparse
raw_input = input
useragent = 'Mozilla/5.0'
headers = {'User-Agent': useragent}
intro = """
Usage: drdown.py url
This script finds the stream URL from a dr.dk page so you can
download the tv program.
def fetch(url):
"""Download body from url"""
req = Request(url, headers=headers)
response = urlopen(req)
body = response.read()
response.close()
# convert to string - it is easier to convert here
if isinstance(body, bytes):
body = body.decode('utf8')
return body
class StreamExtractor:
def __init__(self, url):
self.url = url.lower()
self.urlp = urlparse(self.url)
def get_stream_data(self):
"""supply a URL to a video page on dr.dk and get back a streaming
url"""
if self.urlp.netloc not in ('dr.dk', 'www.dr.dk'):
raise Exception("Must be an URL from dr.dk")
self.html = fetch(self.url)
logging.info("Player fetched: " + self.url)
# Standalone show?
if self.urlp.path.startswith('/tv/se/'):
return self.get_stream_data_from_standalone()
# Bonanza?
elif self.urlp.path.startswith('/bonanza/'):
return self.get_stream_data_from_bonanza()
# Live tv?
elif self.urlp.path.startswith('/tv/live'):
return self.get_stream_data_from_live()
else:
return self.get_stream_data_from_series()
def get_stream_data_from_rurl(self, rurl):
"""Helper method to parse resource JSON document"""
body = fetch(rurl)
resource_data = json.loads(body)
qualities = resource_data.get('links')
# sort by quality
qualities = sorted(qualities, key=lambda x: x['bitrateKbps'],
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stream_data = qualities[0]
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logging.info("Stream data fetched: " + stream_url)
playpath, filename = self.get_metadata_from_stream_url(stream_url)
stream_data = {'stream_url': stream_url,
'playpath': playpath,
'filename': filename,
'is_live': False}
return stream_data
def get_metadata_from_stream_url(self, stream_url):
"""Helper method to extacts playpath and filename suggestion from a
rtmp url"""
parsed = urlparse(stream_url)
playpath_s = parsed.path.split('/')[2:]
playpath = '/'.join(playpath_s)
# rerun to split the parameter
path = urlparse(parsed.path).path
filename = path.split('/')[-1]
return playpath, filename
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"""Extracts stream data from a normal single program page.
The data is hidden in a resource URL, that we need to download
and parse.
mu_regex = re.compile('resource: "([^"]+)"')
m = mu_regex.search(self.html)
if m and m.groups():
resource_meta_url = m.groups()[0]
return self.get_stream_data_from_rurl(resource_meta_url)
def get_stream_data_from_bonanza(self):
"""Finds stream URL from bonanza section. Just pick up the first RTMP
url.
stream_regex = re.compile('rtmp://.*?\.mp4')
m = stream_regex.search(self.html)
if m and m.group():
stream_url = m.group()
else:
raise Exception("Could not find Bonanza stream URL")
playpath, filename = self.get_metadata_from_stream_url(stream_url)
stream_data = {'stream_url': stream_url,
'playpath': playpath,
'filename': filename,
'is_live': False}
return stream_data
def get_stream_data_from_live(self):
stream_url = 'rtmp://livetv.gss.dr.dk/live'
quality = '3'
playpaths = {'dr1': 'livedr01astream',
'dr2': 'livedr02astream',
'dr-ramasjang': 'livedr05astream',
'dr-k': 'livedr04astream',
'dr-update-2': 'livedr03astream',
'dr3': 'livedr06astream'}
urlend = self.urlp.path.split('/')[-1]
playpath = playpaths.get(urlend)
filename = 'live.mp4'
if playpath:
playpath += quality
filename = urlend + '.mp4'
stream_data = {'stream_url': stream_url,
'playpath': playpath,
'filename': filename,
'is_live': True}
return stream_data
def get_stream_data_from_series(self):
"""dr.dk has a special player for multi episode series. This is the
fall back parser, as there seems to be no pattern in the URL."""
slug_regex = re.compile('seriesSlug=([^"]+)"')
m = slug_regex.search(self.html)
if m and m.groups():
slug_id = m.groups()[0]
else:
raise Exception("Could not find program slug")
logging.info("found slug: " + slug_id)
program_meta_url = 'http://www.dr.dk/nu/api/programseries/%s/videos'\
% slug_id
body = fetch(program_meta_url)
program_data = json.loads(body)
if not program_data:
raise Exception("Could not find data about the program series")
fragment = self.urlp.fragment
if fragment.startswith('/'):
fragment = fragment[1:]
fragment = fragment.split('/')
video_id = fragment[0]
logging.info("Video ID: " + video_id)
video_data = None
if video_id:
for item in program_data:
if item['id'] == int(video_id):
video_data = item
if not video_data:
video_data = program_data[0]
resource_meta_url = video_data.get('videoResourceUrl')
return self.get_stream_data_from_rurl(resource_meta_url)
def generate_cmd(self):
"""Build command line to download stream with the rtmpdump tool"""
sdata = self.get_stream_data()
if not sdata:
return "Not found"
filename = sdata['filename']
custom_filename = raw_input("Type another filename or press <enter> to keep default [%s]: " % filename)
if custom_filename:
filename = custom_filename
cmd_live = 'rtmpdump --live --rtmp="%s" --playpath="%s" -o %s'
cmd_rec = 'rtmpdump -e --rtmp="%s" --playpath="%s" -o %s'
if sdata['is_live'] is True:
cmd = cmd_live % (sdata['stream_url'], sdata['playpath'], filename)
else:
cmd = cmd_rec % (sdata['stream_url'], sdata['playpath'], filename)
return cmd
def main():
if len(sys.argv) > 1:
url = sys.argv[1]
extractor = StreamExtractor(url)
cmd = extractor.generate_cmd()
os.system(cmd)
else:
print(intro)
if __name__ == "__main__":
main()
When I run the script with an appropriate URL as parameter, I get this:
Traceback (most recent call last):
File "./drdown.py", line 243, in <module>
main()
File "./drdown.py", line 235, in main
cmd = extractor.generate_cmd()
File "./drdown.py", line 211, in generate_cmd
sdata = self.get_stream_data()
File "./drdown.py", line 65, in get_stream_data
return self.get_stream_data_from_standalone()
File "./drdown.py", line 123, in get_stream_data_from_standalone
return self.get_stream_data_from_rurl(resource_meta_url)
File "./drdown.py", line 87, in get_stream_data_from_rurl
reverse=True)
TypeError: 'NoneType' object is not iterable
I should note that I didn't expect it to work out of the box, but so far I've been unable even to figure out what the problem is, no less solve it.
I've tried my best to go through the code, looking for typos and such, but I haven't had any luck and much of what happens I don't really understand.
So please, if you can, I'd very much appreciate a little help.
Best regards.
NB:
Some might conclude that this script does something illegal. In actuality that is not so, just make that clear. Also, testing from outside Denmark, will probably not be possible.
Last edited by zacariaz (2013-11-08 18:00:33)

Trilby wrote:
zacariaz wrote:Have the following code (Haven't written it my self and don't know much about how it does what it's supposed to do.)
You know a lot more than we do: like where you then found this code, and what it is supposed to do.
My only first thought without looking through random code that allegedly serves some unknown purpose and comes from some unknown source is that the shebang is ambiguous: it may be a python 2 script while /usr/bin/python is now python 3.
I've pretty much concluded that python 3.3 is the right choice, sp that should not be a problem, as for what it does, it uses "rtmpdump" to record or "rip" video from a danish site "dr.dk", which is a public service television network.
I have it from reliable sources that this actually works, or at least did at some point, on Windows machines, but of course i'm on linux, and that complicated matters.
All in all, as I understand it, what the script really does, is retrieving the relevant rtmp link. The rest is up to "rmtpdump" which I should be able to manage.
In any case, I'm not really that concerned with learning what the script does at this point, but rather what the error mean.
The only actual error description I see is: "TypeError: 'NoneType' object is not iterable" and I haven't a clue what that implies. I've read through the script, but haven't been able to find any obvious flaws..

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