1# Service Bus - Bicep Patterns
2 
3## Namespace
4 
5```bicep
6resource serviceBus 'Microsoft.ServiceBus/namespaces@2022-10-01-preview' = {
7  name: '${resourcePrefix}-sb-${uniqueHash}'
8  location: location
9  sku: {
10    name: 'Standard'
11    tier: 'Standard'
12  }
13}
14```
15 
16## Queue
17 
18```bicep
19resource queue 'Microsoft.ServiceBus/namespaces/queues@2022-10-01-preview' = {
20  parent: serviceBus
21  name: 'orders'
22  properties: {
23    maxDeliveryCount: 10
24    deadLetteringOnMessageExpiration: true
25    defaultMessageTimeToLive: 'P14D'
26    lockDuration: 'PT5M'
27  }
28}
29```
30 
31## Topic and Subscription
32 
33```bicep
34resource topic 'Microsoft.ServiceBus/namespaces/topics@2022-10-01-preview' = {
35  parent: serviceBus
36  name: 'events'
37  properties: {
38    defaultMessageTimeToLive: 'P14D'
39  }
40}
41 
42resource subscription 'Microsoft.ServiceBus/namespaces/topics/subscriptions@2022-10-01-preview' = {
43  parent: topic
44  name: 'order-processor'
45  properties: {
46    maxDeliveryCount: 10
47    deadLetteringOnMessageExpiration: true
48    lockDuration: 'PT5M'
49  }
50}
51```
52 
53## Subscription Filters
54 
55### SQL Filter
56 
57```bicep
58resource filterRule 'Microsoft.ServiceBus/namespaces/topics/subscriptions/rules@2022-10-01-preview' = {
59  parent: subscription
60  name: 'high-priority'
61  properties: {
62    filterType: 'SqlFilter'
63    sqlFilter: {
64      sqlExpression: 'priority = \'high\''
65    }
66  }
67}
68```
69 
70### Correlation Filter
71 
72```bicep
73resource correlationRule 'Microsoft.ServiceBus/namespaces/topics/subscriptions/rules@2022-10-01-preview' = {
74  parent: subscription
75  name: 'orders-only'
76  properties: {
77    filterType: 'CorrelationFilter'
78    correlationFilter: {
79      label: 'order'
80    }
81  }
82}
83```
84 
85## Managed Identity Access
86 
87### Service Bus Data Receiver (for triggers/consumers)
88 
89```bicep
90resource serviceBusReceiverRole 'Microsoft.Authorization/roleAssignments@2022-04-01' = {
91  name: guid(serviceBus.id, principalId, 'Azure Service Bus Data Receiver')
92  scope: serviceBus
93  properties: {
94    roleDefinitionId: subscriptionResourceId('Microsoft.Authorization/roleDefinitions', '4f6d3b9b-027b-4f4c-9142-0e5a2a2247e0')
95    principalId: principalId
96    principalType: 'ServicePrincipal'
97  }
98}
99```
100 
101### Service Bus Data Sender (for producers)
102 
103```bicep
104resource serviceBusSenderRole 'Microsoft.Authorization/roleAssignments@2022-04-01' = {
105  name: guid(serviceBus.id, principalId, 'Azure Service Bus Data Sender')
106  scope: serviceBus
107  properties: {
108    roleDefinitionId: subscriptionResourceId('Microsoft.Authorization/roleDefinitions', '69a216fc-b8fb-44d8-bc22-1f3c2cd27a39')
109    principalId: principalId
110    principalType: 'ServicePrincipal'
111  }
112}
113```
114 
115### Both Sender and Receiver
116 
117```bicep
118// Grant both sender and receiver roles for bidirectional messaging
119resource serviceBusReceiverRole 'Microsoft.Authorization/roleAssignments@2022-04-01' = {
120  name: guid(serviceBus.id, principalId, 'receiver')
121  scope: serviceBus
122  properties: {
123    roleDefinitionId: subscriptionResourceId('Microsoft.Authorization/roleDefinitions', '4f6d3b9b-027b-4f4c-9142-0e5a2a2247e0')
124    principalId: principalId
125    principalType: 'ServicePrincipal'
126  }
127}
128 
129resource serviceBusSenderRole 'Microsoft.Authorization/roleAssignments@2022-04-01' = {
130  name: guid(serviceBus.id, principalId, 'sender')
131  scope: serviceBus
132  properties: {
133    roleDefinitionId: subscriptionResourceId('Microsoft.Authorization/roleDefinitions', '69a216fc-b8fb-44d8-bc22-1f3c2cd27a39')
134    principalId: principalId
135    principalType: 'ServicePrincipal'
136  }
137}
138```
139 
140> 💡 **Role Selection:**
141> - Use **Data Receiver** for Function triggers or message consumers
142> - Use **Data Sender** for applications that send messages
143> - Use **both roles** for bidirectional communication
144> - Roles can be scoped to namespace (all queues/topics) or specific queue/topic
145