Support Cosmos DB emulator in spring-cloud-azure-docker-compose

[Copilot]

Cosmos DB was the only service supported in spring-cloud-azure-testcontainers but missing from spring-cloud-azure-docker-compose.

Changes

• CosmosDockerComposeConnectionDetailsFactory — new factory matching images containing cosmosdb/linux/azure-cosmos-emulator; wires endpoint (https://<host>:8081/), the well-known emulator key, GATEWAY connection mode, and endpointDiscoveryEnabled=false. Database is intentionally null so users configure it via spring.cloud.azure.cosmos.database.

• ConfigurationWithConnectionDetailsBean — only overrides database when ConnectionDetails.getDatabase() returns non-null, preserving user-configured values when connection details don't supply a database.

• pom.xml — adds azure-cosmos as an optional compile dependency (required for ConnectionMode).

• spring.factories — registers CosmosDockerComposeConnectionDetailsFactory.

• Test + docker-compose YAML — CosmosDockerComposeConnectionDetailsFactoryTests verifies the factory produces correct connection details when the emulator is running.

Usage

# docker-compose.yaml
services:
  cosmos:
    image: mcr.microsoft.com/cosmosdb/linux/azure-cosmos-emulator:latest
    ports:
      - "8081"
    environment:
      AZURE_COSMOS_EMULATOR_PARTITION_COUNT: 3
      AZURE_COSMOS_EMULATOR_ENABLE_DATA_PERSISTENCE: false

# application.properties
spring.cloud.azure.cosmos.database=mydb

Spring Boot auto-detects the running Cosmos emulator service and populates AzureCosmosConnectionDetails automatically.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>[FEATURE REQ] Support Cosmos in spring-cloud-azure-docker-compose</issue_title>
<issue_description>Is your feature request related to a problem? Please describe.

Current status

Service	Supported in spring-cloud-azure-docker-compose	Supported in spring-cloud-azure-testcontainers
Service Bus	✅	✅
Cosmos	❌	✅
EventHubs	✅	✅
StorageBlob	✅	✅
StorageQueue	✅	✅

Describe the solution you'd like
Support Cosmos in spring-cloud-azure-docker-compose

Additional context
Link to related comment: #41321 (comment)

Information Checklist
Kindly make sure that you have added all the following information above and checkoff the required fields otherwise we will treat the issuer as an incomplete report

• Description Added
• Expected solution specified
  </issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes [FEATURE REQ] Support Cosmos in spring-cloud-azure-docker-compose #48079

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[rujche]

Closing this PR. Current implementation can not solve this problem: unable to find valid certification path to requested target. I tried to use Copilot to fix this problem, but failed.