* Asyncore and asyncio-based APIs reworked to become functions.

* Asyncio and Twisted API moved entirely into high-level domain to
  be aligned with other high-level APIs. This WILL BREAK backward
  compatibility for those apps that use Twisted API.

1 files changed, 56 insertions, 0 deletions

diff --git a/examples/hlapi/twisted/manager/cmdgen/multiple-concurrent-async-queries.py b/examples/hlapi/twisted/manager/cmdgen/multiple-concurrent-async-queries.py
new file mode 100644
index 0000000..5349e97
--- /dev/null
+++ b/examples/hlapi/twisted/manager/cmdgen/multiple-concurrent-async-queries.py
@@ -0,0 +1,56 @@
+"""
+Concurrent queries
+++++++++++++++++++
+
+Send multiple SNMP GET requests at once using the following options:
+
+* with SNMPv2c, community 'public'
+* over IPv4/UDP
+* to an Agent at demo.snmplabs.com:161
+* for two instances of SNMPv2-MIB::sysDescr.0 and SNMPv2-MIB::sysLocation.0
+  MIB object,
+* based on Twisted I/O framework
+
+Functionally similar to:
+
+| $ snmpget -v2c -c public demo.snmplabs.com SNMPv2-MIB::sysDescr.0
+| $ snmpget -v2c -c public demo.snmplabs.com SNMPv2-MIB::sysLocation.0
+
+"""#
+from twisted.internet.defer import DeferredList
+from twisted.internet.task import react
+from pysnmp.hlapi.twisted import *
+
+def success((errorStatus, errorIndex, varBinds), hostname):
+    if errorStatus:
+        print('%s: %s at %s' % (
+                hostname,
+                errorStatus.prettyPrint(),
+                errorIndex and varBinds[int(errorIndex)-1][0] or '?'
+            )
+        )
+    else:
+        for varBind in varBinds:
+            print(' = '.join([ x.prettyPrint() for x in varBind ]))
+
+def failure(errorIndication, hostname):
+    print('%s failure: %s' % (hostname, errorIndication))
+
+def getSystem(reactor, hostname):
+    snmpEngine = SnmpEngine()
+
+    def getScalar(objectType):
+        d = getCmd(snmpEngine,
+                   CommunityData('public', mpModel=0),
+                   UdpTransportTarget((hostname, 161)),
+                   ContextData(),
+                   objectType)
+        d.addCallback(success, hostname).addErrback(failure, hostname)
+        return d
+
+    return DeferredList(
+        [getScalar(ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0))),
+         getScalar(ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysLocation', 0)))]
+    )
+
+react(getSystem, ['demo.snmplabs.com'])