Add Support for Emulator Blob Storage

azure-spring-boot-samples/azure-storage-spring-boot-sample/src/main/resources/application.properties

@@ -2,3 +2,7 @@ azure.storage.account-name=put-your-azure-storage-account-name-here
 azure.storage.account-key=put-your-azure-storage-account-key-here
 azure.storage.container-name=put-your-azure-storage-container-name-here
 azure.storage.enable-https=true
+
+# Set the below property to true if you want to use the emulator
+azure.storage.use-emulator=false
+azure.storage.emulator-blob-host=put-your-emulator-blob-service-host-here

azure-spring-boot-starters/azure-storage-spring-boot-starter/README.md

@@ -26,6 +26,19 @@ azure.storage.container-name=put-your-azure-storage-container-name-here
 With above configuration, a `ServiceURL` and a `ContainerURL` bean will be created.
 `azure.storage.container-name` is optional, you can also create `ContainerURL` from `ServiceURL` by `ServiceURL#createContainerURL(String containerName)`.
 
+### Use storage emulators for non production environments
+
+If you intend to use [Azure Storage Emulator](https://docs.microsoft.com/en-us/azure/storage/common/storage-use-azurite) or [Azurite](https://github.com/Azure/Azurite) in non production environment, you can enable the emulator use and specify the blob service endpoint.
+Open 'application-dev.properties' file and add below property taken from your emulator configurations.
+
+```
+azure.storage.account-name=put-your-emulator-storage-account-name-here
+azure.storage.account-key=put-your-emulator-storage-account-key-here
+azure.storage.container-name=put-your-emulator-storage-container-name-here
+azure.storage.use-emulator=true
+azure.storage.emulator-blob-host=put-your-emulator-blob-service-host-here
+``` 
+
 ### Add auto-wiring code
 
 Add below alike code to auto-wire the `ServiceURL` bean and `ContainerURL` bean. For details usage, please reference this [document](https://docs.microsoft.com/en-us/azure/storage/blobs/storage-quickstart-blobs-java-v10#upload-blobs-to-the-container).

azure-spring-boot/src/main/java/com/microsoft/azure/spring/autoconfigure/storage/StorageAutoConfiguration.java

@@ -64,6 +64,10 @@ public ServiceURL createServiceUrl(@Autowired(required = false) PipelineOptions
     }
 
     private URL getURL() throws MalformedURLException {
+        if (properties.isUseEmulator()) {
+            LOG.debug("Using emulator address instead..");
+            return new URL(String.format("%s/%s", properties.getEmulatorBlobHost(), properties.getAccountName()));
+        }
         if (properties.isEnableHttps()) {
             return new URL(String.format(BLOB_HTTPS_URL, properties.getAccountName()));
         }

azure-spring-boot/src/main/java/com/microsoft/azure/spring/autoconfigure/storage/StorageProperties.java

@@ -25,6 +25,14 @@ public class StorageProperties {
     @Setter
     private String accountKey;
 
+    @Getter
+    @Setter
+    private boolean useEmulator = false;
+
+    @Getter
+    @Setter
+    private String emulatorBlobHost;
+
     @Getter
     @Setter
     private String containerName;

azure-spring-boot/src/test/java/com/microsoft/azure/spring/autoconfigure/storage/StoragePropertiesTest.java

@@ -16,10 +16,14 @@ public class StoragePropertiesTest {
     private static final String ACCOUNT_NAME_PROP = "azure.storage.account-name";
     private static final String ACCOUNT_KEY_PROP = "azure.storage.account-key";
     private static final String CONTAINER_NAME_PROP = "azure.storage.container-name";
+    private static final String USE_EMULATOR_PROP = "azure.storage.use-emulator";
+    private static final String EMULATOR_BLOB_HOST_PROP = "azure.storage.emulator-blob-host";
 
     private static final String ACCOUNT_NAME = "fakeStorageAccountName";
     private static final String ACCOUNT_KEY = "ZmFrZUFjY291bnRLZXk="; /* Base64 encoded for string fakeAccountKey */
     private static final String CONTAINER_NAME = "fakestoragecontainername";
+    private static final boolean USE_EMULATOR = true;
+    private static final String EMULATOR_BLOB_HOST = "http://127.0.0.1:1000";
 
     private ApplicationContextRunner contextRunner = new ApplicationContextRunner()
             .withConfiguration(AutoConfigurations.of(StorageAutoConfiguration.class));
@@ -36,6 +40,19 @@ public void canSetProperties() {
                 });
     }
 
+    @Test
+    public void canSetEmulatorProperties() {
+        contextRunner.withPropertyValues(propValuePair(ACCOUNT_NAME_PROP, ACCOUNT_NAME),
+                propValuePair(ACCOUNT_KEY_PROP, ACCOUNT_KEY), propValuePair(CONTAINER_NAME_PROP, CONTAINER_NAME),
+                propValuePair(USE_EMULATOR_PROP, Boolean.toString(USE_EMULATOR)),
+                propValuePair(EMULATOR_BLOB_HOST_PROP, EMULATOR_BLOB_HOST))
+                .run(context -> {
+                    final StorageProperties properties = context.getBean(StorageProperties.class);
+                    assertThat(properties.isUseEmulator()).isEqualTo(USE_EMULATOR);
+                    assertThat(properties.getEmulatorBlobHost()).isEqualTo(EMULATOR_BLOB_HOST);
+                });
+    }
+
     @Test
     public void emptySettingNotAllowed() {
         try {