1.. _example_setup_ctx:
2
3==============================
4Lookup from threads
5==============================
6
7This example shows how to use unbound module from a threaded program. 
8In this example, three lookup threads are created which work in background. 
9Each thread resolves different DNS record. 
10
11::
12
13	#!/usr/bin/python
14	from unbound import ub_ctx, RR_TYPE_A, RR_CLASS_IN
15	from threading import Thread
16	
17	ctx = ub_ctx()
18	ctx.resolvconf("/etc/resolv.conf")
19	
20	class LookupThread(Thread):
21		def __init__(self,ctx, name):
22			Thread.__init__(self)
23			self.ctx = ctx
24			self.name = name
25
26		def run(self):
27			print "Thread lookup started:",self.name
28			status, result = self.ctx.resolve(self.name, RR_TYPE_A, RR_CLASS_IN)
29			if status == 0 and result.havedata:
30				print "  Result:",self.name,":", result.data.address_list
31	
32	threads = []
33	for name in ["www.fit.vutbr.cz","www.vutbr.cz","www.google.com"]:
34		thread = LookupThread(ctx, name)
35		thread.start()
36		threads.append(thread)
37	    
38	for thread in threads:
39		thread.join()
40
41
42