Added S3Manager.load() method.

src/integrationTest/java/app/mealsmadeeasy/api/s3/MinioS3ManagerTests.java

@@ -36,14 +36,36 @@ public class MinioS3ManagerTests {
     @Test
     public void simpleStore() {
         try (final InputStream hal9000 = MinioS3ManagerTests.class.getResourceAsStream("HAL9000.svg")) {
-            final String result = this.s3Manager.store(
+            final String objectName = this.s3Manager.store(
                     "test-images",
                     "HAL9000.svg",
                     "image/svg+xml",
                     hal9000,
                     27881L
             );
-            assertEquals("HAL9000.svg", result);
+            assertEquals("HAL9000.svg", objectName);
+        } catch (IOException ioException) {
+            throw new RuntimeException(ioException);
+        }
+    }
+
+    @Test
+    public void simpleLoad() {
+        try (final InputStream hal9000 = MinioS3ManagerTests.class.getResourceAsStream("HAL9000.svg")) {
+            if (hal9000 == null) {
+                throw new RuntimeException("HAL9000.svg could not be found");
+            }
+            final String objectName = this.s3Manager.store(
+                    "test-images",
+                    "HAL9000.svg",
+                    "image/svg+xml",
+                    hal9000,
+                    27881L
+            );
+            try (final InputStream loadedObject = this.s3Manager.load("test-images", objectName)) {
+                final byte[] stored = loadedObject.readAllBytes();
+                assertEquals(27881L, stored.length);
+            }
         } catch (IOException ioException) {
             throw new RuntimeException(ioException);
         }

src/main/java/app/mealsmadeeasy/api/s3/MinioS3Manager.java

@@ -22,6 +22,22 @@ public class MinioS3Manager implements S3Manager {
     @Value("${app.mealsmadeeasy.api.minio.secretKey}")
     private String secretKey;
 
+    @Override
+    public InputStream load(String bucket, String objectName) throws IOException {
+        try (final MinioClient client = MinioClient.builder()
+                .endpoint(this.endpoint)
+                .credentials(this.accessKey, this.secretKey)
+                .build()
+        ) {
+            return client.getObject(GetObjectArgs.builder()
+                    .bucket(bucket)
+                    .object(objectName)
+                    .build());
+        } catch (Exception e) {
+            throw new IOException(e);
+        }
+    }
+
     @Override
     public String store(
             String bucketName,

src/main/java/app/mealsmadeeasy/api/s3/S3Manager.java

@@ -5,6 +5,11 @@ import java.io.InputStream;
 
 public interface S3Manager {
 
+    InputStream load(
+            String bucket,
+            String objectName
+    ) throws IOException;
+
     /**
      * @param bucket the target bucket in which to store the content
      * @param filename the filename to store, usually a uuid + appropriate extension