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Shows how to use Azure Functions with Java to analyze Event Hub events and store results in a Cosmos DB. |
sample |
Shows how to use Azure Functions with Java to handle Event Hub events and store analysis results in a Cosmos DB.
This sample accompanies Tutorial: Create an Azure function in Java with an Event Hub trigger and Cosmos DB output binding.
Navigate to the folder containing the repo and run the following commands. Replace the <value>
placeholders with appropriate resource names and location.
RESOURCE_GROUP=<value>
EVENT_HUB_NAMESPACE=<value>
EVENT_HUB_NAME=<value>
EVENT_HUB_AUTHORIZATION_RULE=<value>
COSMOS_DB_ACCOUNT=<value>
STORAGE_ACCOUNT=<value>
FUNCTION_APP=<value>
LOCATION=<value>
az group create \
--name $RESOURCE_GROUP \
--location $LOCATION
az eventhubs namespace create \
--resource-group $RESOURCE_GROUP \
--name $EVENT_HUB_NAMESPACE
az eventhubs eventhub create \
--resource-group $RESOURCE_GROUP \
--name $EVENT_HUB_NAME \
--namespace-name $EVENT_HUB_NAMESPACE \
--message-retention 1
az eventhubs eventhub authorization-rule create \
--resource-group $RESOURCE_GROUP \
--name $EVENT_HUB_AUTHORIZATION_RULE \
--eventhub-name $EVENT_HUB_NAME \
--namespace-name $EVENT_HUB_NAMESPACE \
--rights Listen Send
az cosmosdb create \
--resource-group $RESOURCE_GROUP \
--name $COSMOS_DB_ACCOUNT
az cosmosdb database create \
--resource-group-name $RESOURCE_GROUP \
--name $COSMOS_DB_ACCOUNT \
--db-name TelemetryDb
az cosmosdb collection create \
--resource-group-name $RESOURCE_GROUP \
--name $COSMOS_DB_ACCOUNT \
--collection-name TelemetryInfo \
--db-name TelemetryDb \
--partition-key-path '/temperatureStatus'
az storage account create \
--resource-group $RESOURCE_GROUP \
--name $STORAGE_ACCOUNT \
--sku Standard_LRS
az functionapp create \
--resource-group $RESOURCE_GROUP \
--name $FUNCTION_APP \
--storage-account $STORAGE_ACCOUNT \
--consumption-plan-location $LOCATION \
--runtime java
AZURE_WEB_JOBS_STORAGE=$( \
az storage account show-connection-string \
--name $STORAGE_ACCOUNT \
--query connectionString \
--output tsv)
echo $AZURE_WEB_JOBS_STORAGE
EVENT_HUB_CONNECTION_STRING=$( \
az eventhubs eventhub authorization-rule keys list \
--resource-group $RESOURCE_GROUP \
--name $EVENT_HUB_AUTHORIZATION_RULE \
--eventhub-name $EVENT_HUB_NAME \
--namespace-name $EVENT_HUB_NAMESPACE \
--query primaryConnectionString \
--output tsv)
echo $EVENT_HUB_CONNECTION_STRING
COSMOS_DB_CONNECTION_STRING=$( \
az cosmosdb keys list \
--resource-group $RESOURCE_GROUP \
--name $COSMOS_DB_ACCOUNT \
--type connection-strings \
--query connectionStrings[0].connectionString \
--output tsv)
echo $COSMOS_DB_CONNECTION_STRING
az functionapp config appsettings set \
--resource-group $RESOURCE_GROUP \
--name $FUNCTION_APP \
--settings \
AzureWebJobsStorage=$AZURE_WEB_JOBS_STORAGE \
EventHubConnectionString=$EVENT_HUB_CONNECTION_STRING \
CosmosDBConnectionString=$COSMOS_DB_CONNECTION_STRING
mvn archetype:generate --batch-mode \
-DarchetypeGroupId=com.microsoft.azure \
-DarchetypeArtifactId=azure-functions-archetype \
-DappName=$FUNCTION_APP \
-DresourceGroup=$RESOURCE_GROUP \
-DgroupId=com.example \
-DartifactId=telemetry-functions
cd telemetry-functions
rm -r src/test
func azure functionapp fetch-app-settings $FUNCTION_APP
Run the sample locally:
mvn clean package
mvn azure-functions:run
Deploy to Azure:
mvn azure-functions:deploy
Clean up Azure resources when you are finished:
az group delete --name $RESOURCE_GROUP
For details, see Tutorial: Create an Azure function in Java with an Event Hub trigger and Cosmos DB output binding.
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