Chilkat2-Python

Azure Service Bus - Unlock Message

See more Azure Service Bus Examples

Shows how to unlock a message for processing by other receivers on a specified queue or subscription. This operation deletes the lock object, causing the message to be unlocked.

For more information, see https://docs.microsoft.com/en-us/rest/api/servicebus/unlock-message

Chilkat2-Python

import sys
import chilkat2

success = False

# Note: Requires Chilkat v9.5.0.65 or greater.

# This requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# Make the initial connection.
# A single REST object, once connected, can be used for many Azure Service Bus REST API calls.
# The auto-reconnect indicates that if the already-established HTTPS connection is closed,
# then it will be automatically re-established as needed.
rest = chilkat2.Rest()
bAutoReconnect = True
success = rest.Connect("<yournamespace>.servicebus.windows.net",443,True,bAutoReconnect)
if (success != True):
    print(rest.LastErrorText)
    sys.exit()

# Let's load a previously computed SAS token and use it.
# See Azure Shared Access Signature for an example to genenerate an Azure SAS token.
sbToken = chilkat2.StringBuilder()
sbToken.LoadFile("qa_data/tokens/serviceBusSas.txt","utf-8")

# Tell the REST object to use the Azure Shared Access Signature for authorization.
sbToken.Prepend("SharedAccessSignature ")
rest.AddHeader("Authorization",sbToken.GetAsString())

# ----------------------------------------------------------------------------------------------
# The code above this comment could be placed inside a function/subroutine within the application
# because the connection does not need to be made for every request.  Once the connection is made
# the app may send many requests..
# ----------------------------------------------------------------------------------------------

# To unlock a message, we'll need either the SequenceNumber or MessageId.
# When the message was locked, the SequenceNumber and MessageId of the locked message
# was returned in the HTTP response header named "BrokerProperties, which contained
# JSON such as the following:

# 	{
# 	  "DeliveryCount": 2,
# 	  "EnqueuedSequenceNumber": 3000003,
# 	  "EnqueuedTimeUtc": "Wed, 07 Dec 2016 17:42:48 GMT",
# 	  "Label": "M2",
# 	  "LockToken": "0a13ee8a-be32-4458-89e0-5e1401caa6a0",
# 	  "LockedUntilUtc": "Wed, 07 Dec 2016 18:13:12 GMT",
# 	  "MessageId": "7bea513a6ddb49089e07bfbee26d85bd",
# 	  "SequenceNumber": 3,
# 	  "State": "Active",
# 	  "TimeToLive": 922337203685.47754
# 	}

# The path for unlocking a message is constructed as follows, depending on
# whether it is a message on a queue or subscription:
# 
# (for a queue)
# /{queuePath}/messages/{messageId|sequenceNumber}/{lockToken}
# 
# (for a subscription)
# /{topicPath}/subscriptions/{subscriptionName}/messages/{messageId|sequenceNumber}/{lockToken}

# This example will build a path to unlock a message contained in a subscription.
topicName = "gilaMonster"
subscriptionName = "feedings"
messageId = "7bea513a6ddb49089e07bfbee26d85bd"
lockToken = "0a13ee8a-be32-4458-89e0-5e1401caa6a0"

# Build the path..
sbPath = chilkat2.StringBuilder()
sbPath.Append("/{topicPath}/subscriptions/{subscriptionName}/messages/{messageId|sequenceNumber}/{lockToken}")
numReplaced = sbPath.Replace("{topicPath}",topicName)
numReplaced = sbPath.Replace("{subscriptionName}",subscriptionName)
numReplaced = sbPath.Replace("{messageId|sequenceNumber}",messageId)
numReplaced = sbPath.Replace("{lockToken}",lockToken)

# Add a timeout parameter.
rest.AddQueryParam("timeout","20")

# Use the PUT HTTP verb to unlock the message.
sbResponseBody = chilkat2.StringBuilder()
success = rest.FullRequestNoBodySb("PUT",sbPath.GetAsString(),sbResponseBody)
if (success != True):
    print(rest.LastErrorText)
    sys.exit()

print("Response Status Code = " + str(rest.ResponseStatusCode))

# Check for a success response.
if (rest.ResponseStatusCode != 200):
    print(rest.LastRequestStartLine)
    print(rest.LastRequestHeader)
    print(sbResponseBody.GetAsString())
    print("Failed.")
    sys.exit()

# If successful, the response body would be empty..
print("Success.")