v6: Backups

README.md

@@ -710,6 +710,64 @@ client.collections.update("Songs_Alias", "PopSongs");
 client.collections.delete("Songs_Alias");
 ```
 
+### Managing collection backups
+
+> [!CAUTION]
+> Weaviate does not support concurrent backups. Await one backup's completion before starting another one.
+
+```java
+// Start a backup:
+Backup backup = client.backup.create(
+  "backup_1", "filesystem",
+  bak -> bak
+    .includeCollections("Songs", "Artists")
+    .compressionLevel(CompressionLevel.BEST_COMPRESSION)
+    .cpuPercentage(30)
+);
+
+// By default, the client does not monitor the backup status.
+// The above method returns as soon as the server acknowledges
+// the request and starts to process it.
+//
+// Now you can poll backup status to know when it is succeedes (or fails).
+
+Backup status = client.backup.getCreateStatus(backup.id(), backup.backend());
+if (status.status() == BackupStatus.SUCCESSFUL) {
+    System.out.println("Yay!");
+    System.exit(0);
+}
+
+// Backups may take a write to complete. To block the current thread until
+// the execution completes, call Backup::waitForCompletion(WeaviateClient).
+//
+// Notice that, while we use `backup` object we can also call it on the `status`,
+// as both will have sufficient information to identify the backup operation.
+
+try {
+    Backup completed = backup.waitForCompletion(client);
+    assert completed.errors() == null : "completed with errors";
+} catch (TimeoutException e) {
+    System.out.exit(1);
+}
+
+// List exists backups:
+List<Backup> allBackups = client.backup.list();
+
+// Restore from the first backup:
+var first = allBackups.getFirst();
+client.backup.restore(first.id(), first.backend());
+
+// Similarly, wait until the restore is complete using Backup::waitForCompletion.
+// It is possible to set a custom timeout and polling interval using a familiar Tucked Builder pattern:
+
+var restoring = client.backup.getRestoreStatus(first.id(), first.backend());
+var restored = restoring.waitForCompletion(client, wait -> wait
+     .timeout(Duration.ofMinutes(30))
+     .interval(Duration.ofMinutes(5)));
+
+assert restored.errors() == null : "restored with errors";
+```
+
 ## Useful resources
 
 - [Documentation](https://weaviate.io/developers/weaviate/current/client-libraries/java.html).

src/it/java/io/weaviate/containers/Weaviate.java

@@ -137,6 +137,12 @@ public Builder withOffloadS3(String accessKey, String secretKey) {
       return this;
     }
 
+    public Builder withFilesystemBackup(String fsPath) {
+      addModules("backup-filesystem");
+      environment.put("BACKUP_FILESYSTEM_PATH", fsPath);
+      return this;
+    }
+
     public Builder enableTelemetry(boolean enable) {
       environment.put("DISABLE_TELEMETRY", Boolean.toString(!enable));
       return this;

src/it/java/io/weaviate/integration/AliasITest.java

@@ -12,7 +12,7 @@
 import io.weaviate.containers.Container;
 
 public class AliasITest extends ConcurrentTest {
-  private static WeaviateClient client = Container.WEAVIATE.getClient();
+  private static final WeaviateClient client = Container.WEAVIATE.getClient();
 
   @Test
   public void test_aliasLifecycle() throws IOException {

src/it/java/io/weaviate/integration/BackupITest.java

@@ -0,0 +1,251 @@
+package io.weaviate.integration;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionException;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeoutException;
+import java.util.stream.IntStream;
+
+import org.assertj.core.api.Assertions;
+import org.assertj.core.api.InstanceOfAssertFactories;
+import org.junit.Test;
+
+import io.weaviate.ConcurrentTest;
+import io.weaviate.client6.v1.api.WeaviateClient;
+import io.weaviate.client6.v1.api.backup.Backup;
+import io.weaviate.client6.v1.api.backup.BackupStatus;
+import io.weaviate.client6.v1.api.backup.CompressionLevel;
+import io.weaviate.client6.v1.api.collections.Property;
+import io.weaviate.containers.Weaviate;
+
+public class BackupITest extends ConcurrentTest {
+  private static final WeaviateClient client = Weaviate.custom()
+      .withFilesystemBackup("/tmp/backups").build()
+      .getClient();
+
+  @Test
+  public void test_lifecycle() throws IOException, TimeoutException {
+    // Arrange
+    String nsA = ns("A"), nsB = ns("B"), nsC = ns("C"), nsBig = ns("Big");
+    String backup_1 = ns("backup_1").toLowerCase();
+    String backend = "filesystem";
+
+    // Start writing data in the background so it's ready
+    // by the time we get to backup #3.
+    var spam = spamData(nsBig);
+
+    client.collections.create(nsA);
+    client.collections.create(nsB);
+    client.collections.create(nsC);
+
+    // Insert some data to check restore later
+    var collectionA = client.collections.use(nsA);
+    collectionA.data.insert(Map.of());
+
+    // Act: start backup
+    var started = client.backup.create(backup_1, backend,
+        backup -> backup
+            .includeCollections(nsA, nsB)
+            .compressionLevel(CompressionLevel.BEST_SPEED));
+
+    // Assert
+    Assertions.assertThat(started)
+        .as("created backup operation")
+        .returns(backup_1, Backup::id)
+        .returns(backend, Backup::backend)
+        .returns(BackupStatus.STARTED, Backup::status)
+        .returns(null, Backup::error)
+        .extracting(Backup::includesCollections, InstanceOfAssertFactories.list(String.class))
+        .containsOnly(nsA, nsB);
+
+    // Act: await backup competion
+    var completed = started.waitForCompletion(client);
+
+    // Assert
+    Assertions.assertThat(completed)
+        .as("await backup completion")
+        .returns(backup_1, Backup::id)
+        .returns(backend, Backup::backend)
+        .returns(BackupStatus.SUCCESS, Backup::status)
+        .returns(null, Backup::error);
+
+    // Act: create another backup
+    String backup_2 = ns("backup_2").toLowerCase();
+    client.backup.create(backup_2, backend).waitForCompletion(client);
+
+    // Assert: check the second backup is created successfully
+    var status_2 = client.backup.getCreateStatus(backup_2, backend);
+    Assertions.assertThat(status_2).as("backup #2").get()
+        .returns(BackupStatus.SUCCESS, Backup::status);
+
+    // Act: create and cancel
+    // Try to throttle this backup by creating a lot of objects,
+    // limiting CPU resources and requiring high compression ratio.
+    // This is to avoid flaky tests and make sure we can cancel
+    // the backup before it completes successfully.
+    String backup_3 = ns("backup_3").toLowerCase();
+    spam.join();
+    var cancelMe = client.backup.create(backup_3, backend,
+        backup -> backup
+            .includeCollections(nsA, nsB, nsC, nsBig)
+            .cpuPercentage(1)
+            .compressionLevel(CompressionLevel.BEST_COMPRESSION));
+    cancelMe.cancel(client);
+    cancelMe.waitForStatus(client, BackupStatus.CANCELED, wait -> wait.interval(500));
+
+    // Assert: check the backup is cancelled
+    var status_3 = client.backup.getCreateStatus(backup_3, backend);
+    Assertions.assertThat(status_3).as("backup #3").get()
+        .returns(BackupStatus.CANCELED, Backup::status);
+
+    // Assert: all 3 backups are present
+    var all = client.backup.list(backend);
+    Assertions.assertThat(all).as("all backups")
+        .extracting(Backup::id)
+        .contains(backup_1, backup_2, backup_3);
+
+    // Act: delete data and restore backup #1
+    client.collections.delete(nsA);
+    client.backup.restore(backup_1, backend, restore -> restore.includeCollections(nsA));
+
+    // Assert: object inserted in the beginning of the test is present
+    var restore_1 = client.backup.getRestoreStatus(backup_1, backend)
+        .orElseThrow().waitForCompletion(client);
+    Assertions.assertThat(restore_1).as("restore backup #1")
+        .returns(BackupStatus.SUCCESS, Backup::status);
+    Assertions.assertThat(collectionA.size()).as("after restore backup #1").isEqualTo(1);
+  }
+
+  @Test
+  public void test_lifecycle_async() throws ExecutionException, InterruptedException, Exception {
+    // Arrange
+    String nsA = ns("A"), nsB = ns("B"), nsC = ns("C"), nsBig = ns("Big");
+    String backup_1 = ns("backup_1").toLowerCase();
+    String backend = "filesystem";
+
+    try (final var async = client.async()) {
+      // Start writing data in the background so it's ready
+      // by the time we get to backup #3.
+      var spam = spamData(nsBig);
+
+      CompletableFuture.allOf(
+          async.collections.create(nsA),
+          async.collections.create(nsB),
+          async.collections.create(nsC))
+          .join();
+
+      // Insert some data to check restore later
+      var collectionA = async.collections.use(nsA);
+      collectionA.data.insert(Map.of()).join();
+
+      // Act: start backup
+      var started = async.backup.create(backup_1, backend,
+          backup -> backup
+              .includeCollections(nsA, nsB)
+              .compressionLevel(CompressionLevel.BEST_SPEED))
+          .join();
+
+      // Assert
+      Assertions.assertThat(started)
+          .as("created backup operation")
+          .returns(backup_1, Backup::id)
+          .returns(backend, Backup::backend)
+          .returns(BackupStatus.STARTED, Backup::status)
+          .returns(null, Backup::error)
+          .extracting(Backup::includesCollections, InstanceOfAssertFactories.list(String.class))
+          .containsOnly(nsA, nsB);
+
+      // Act: await backup competion
+      var completed = started.waitForCompletion(async).join();
+
+      // Assert
+      Assertions.assertThat(completed)
+          .as("await backup completion")
+          .returns(backup_1, Backup::id)
+          .returns(backend, Backup::backend)
+          .returns(BackupStatus.SUCCESS, Backup::status)
+          .returns(null, Backup::error);
+
+      // Act: create another backup
+      String backup_2 = ns("backup_2").toLowerCase();
+      async.backup.create(backup_2, backend)
+          .thenCompose(bak -> bak.waitForCompletion(async))
+          .join();
+
+      // Assert: check the second backup is created successfully
+      var status_2 = async.backup.getCreateStatus(backup_2, backend).join();
+      Assertions.assertThat(status_2).as("backup #2").get()
+          .returns(BackupStatus.SUCCESS, Backup::status);
+
+      // Act: create and cancel
+      // Try to throttle this backup by creating a lot of objects,
+      // limiting CPU resources and requiring high compression ratio.
+      // This is to avoid flaky tests and make sure we can cancel
+      // the backup before it completes successfully.
+      String backup_3 = ns("backup_3").toLowerCase();
+      spam.join();
+      async.backup.create(backup_3, backend,
+          backup -> backup
+              .includeCollections(nsA, nsB, nsC, nsBig)
+              .cpuPercentage(1)
+              .compressionLevel(CompressionLevel.BEST_COMPRESSION))
+          .thenCompose(cancelMe -> cancelMe.cancel(async)
+              .thenCompose(__ -> cancelMe.waitForStatus(async, BackupStatus.CANCELED,
+                  wait -> wait.interval(500))))
+          .join();
+
+      // Assert: check the backup is cancelled
+      var status_3 = async.backup.getCreateStatus(backup_3, backend).join();
+      Assertions.assertThat(status_3).as("backup #3").get()
+          .returns(BackupStatus.CANCELED, Backup::status);
+
+      // Assert: all 3 backups are present
+      var all = async.backup.list(backend).join();
+      Assertions.assertThat(all).as("all backups")
+          .extracting(Backup::id)
+          .contains(backup_1, backup_2, backup_3);
+
+      // Act: delete data and restore backup #1
+      async.collections.delete(nsA).join();
+      async.backup.restore(backup_1, backend, restore -> restore.includeCollections(nsA)).join();
+
+      // Assert: object inserted in the beginning of the test is present
+      var restore_1 = async.backup.getRestoreStatus(backup_1, backend)
+          .thenCompose(bak -> bak.orElseThrow().waitForCompletion(async))
+          .join();
+      Assertions.assertThat(restore_1).as("restore backup #1")
+          .returns(BackupStatus.SUCCESS, Backup::status);
+      Assertions.assertThat(collectionA.size().join()).as("after restore backup #1").isEqualTo(1);
+    }
+  }
+
+  @Test(expected = IllegalStateException.class)
+  public void test_waitForCompletion_unknown() throws IOException, TimeoutException {
+    var backup = new Backup("#1", "/tmp/bak/#1", "filesystem", List.of("Things"), BackupStatus.STARTED, null,
+        null);
+    backup.waitForCompletion(client);
+  }
+
+  /** Write 10_000 entries with a UUID[10] property. */
+  private CompletableFuture<Void> spamData(String collectionName) {
+    return CompletableFuture.supplyAsync(() -> {
+      try {
+        client.collections.create(collectionName,
+            c -> c.properties(Property.uuidArray("uuids")));
+
+        var spam = client.collections.use(collectionName);
+        for (int i = 0; i < 10_000; i++) {
+          var uuids = IntStream.range(0, 10).mapToObj(j -> UUID.randomUUID()).toArray();
+          spam.data.insert(Map.of("uuids", uuids));
+        }
+      } catch (IOException e) {
+        throw new CompletionException(e);
+      }
+      return null;
+    });
+  }
+}

src/it/java/io/weaviate/integration/DataITest.java

@@ -29,7 +29,7 @@
 import io.weaviate.containers.Container;
 
 public class DataITest extends ConcurrentTest {
-  private static WeaviateClient client = Container.WEAVIATE.getClient();
+  private static final WeaviateClient client = Container.WEAVIATE.getClient();
   private static final String COLLECTION = unique("Artists");
   private static final String VECTOR_INDEX = "bring_your_own";
 

src/it/java/io/weaviate/integration/ORMITest.java

@@ -23,7 +23,7 @@
 import io.weaviate.containers.Container;
 
 public class ORMITest extends ConcurrentTest {
-  private static WeaviateClient client = Container.WEAVIATE.getClient();
+  private static final WeaviateClient client = Container.WEAVIATE.getClient();
 
   @Collection("ORMITestThings")
   static record Thing(

src/it/java/io/weaviate/integration/PaginationITest.java

@@ -25,7 +25,7 @@
 import io.weaviate.containers.Container;
 
 public class PaginationITest extends ConcurrentTest {
-  private static WeaviateClient client = Container.WEAVIATE.getClient();
+  private static final WeaviateClient client = Container.WEAVIATE.getClient();
 
   @Test
   public void testIterateAll() throws IOException {

src/it/java/io/weaviate/integration/TenantsITest.java

@@ -18,7 +18,7 @@ public class TenantsITest extends ConcurrentTest {
           .build(),
       Container.MINIO);
 
-  private static WeaviateClient client = compose.getClient();
+  private static final WeaviateClient client = compose.getClient();
 
   @Test
   public void test_tenantLifecycle() throws Exception {