def main():
'''Sample usage of Music.'''
kwargs = {'host': 'localhost'}
music = Music(**kwargs)
print "Music version %s" % music.version()
# Randomize the name so that we don't step on each other.
keyspace = 'NewVotingApp' + str(current_time_millis() / 100)
music.create_keyspace(keyspace)
print "Created keyspace: %s" % keyspace
# Create the table
kwargs = {
'keyspace': keyspace,
'table': 'votecount',
'schema': {
'name': 'text',
'count': 'varint',
'PRIMARY KEY': '(name)'
}
}
music.create_table(**kwargs)
# Candidate data
data = {'Trump': 5, 'Bush': 7, 'Jeb': 8, 'Clinton': 2, 'Bharath': 0}
# Create an entry in the voting table for each candidate
# and with a vote count of 0.
kwargs = {'keyspace': keyspace, 'table': 'votecount'}
for name in data.iterkeys():
kwargs['values'] = {'name': name, 'count': 0}
music.create_row(**kwargs)
# Update each candidate's count atomically.
kwargs = {'keyspace': keyspace, 'table': 'votecount', 'pk_name': 'name'}
for name, count in data.iteritems():
kwargs['pk_value'] = name
kwargs['values'] = {'count': count}
music.update_row_atomically(**kwargs)
# Read all rows
kwargs = {'keyspace': keyspace, 'table': 'votecount'}
print music.read_all_rows(**kwargs)
# Delete Clinton, read Trump
kwargs = {'keyspace': keyspace, 'table': 'votecount', 'pk_name': 'name'}
kwargs['pk_value'] = 'Clinton'
music.delete_row_eventually(**kwargs)
kwargs['pk_value'] = 'Trump'
print music.read_row(**kwargs)
# Read all rows again
kwargs = {'keyspace': keyspace, 'table': 'votecount'}
print music.read_all_rows(**kwargs)
# Cleanup.
music.drop_keyspace(keyspace)
music.delete_all_locks()
