feat: [discoveryengine] add search, autocomplete and schema services (#9374)

- [ ] Regenerate this pull request now.

feat: add unstructured document support (PDF/HTML)
docs: keep the API doc up-to-date with recent changes

PiperOrigin-RevId: 526041628

Source-Link: https://togithub.com/googleapis/googleapis/commit/cb802d9a404595943a080378a02f7eabdb111109

Source-Link: https://togithub.com/googleapis/googleapis-gen/commit/ce94886f16aedfea80d5cfb49f3eac8bbeddef66
Copy-Tag: eyJwIjoiamF2YS1kaXNjb3ZlcnllbmdpbmUvLk93bEJvdC55YW1sIiwiaCI6ImNlOTQ4ODZmMTZhZWRmZWE4MGQ1Y2ZiNDlmM2VhYzhiYmVkZGVmNjYifQ==

Author: gcf-owl-bot[bot]

java-discoveryengine/README.md

@@ -23,7 +23,7 @@ If you are using Maven with [BOM][libraries-bom], add this to your pom.xml file:
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>libraries-bom</artifactId>
-      <version>26.11.0</version>
+      <version>26.13.0</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>
@@ -201,7 +201,7 @@ Java is a registered trademark of Oracle and/or its affiliates.
 [kokoro-badge-link-5]: http://storage.googleapis.com/cloud-devrel-public/java/badges/google-cloud-java/java11.html
 [stability-image]: https://img.shields.io/badge/stability-preview-yellow
 [maven-version-image]: https://img.shields.io/maven-central/v/com.google.cloud/google-cloud-discoveryengine.svg
-[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-discoveryengine/0.10.0
+[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-discoveryengine/0.11.0
 [authentication]: https://github.com/googleapis/google-cloud-java#authentication
 [auth-scopes]: https://developers.google.com/identity/protocols/oauth2/scopes
 [predefined-iam-roles]: https://cloud.google.com/iam/docs/understanding-roles#predefined_roles

java-discoveryengine/google-cloud-discoveryengine/src/main/java/com/google/cloud/discoveryengine/v1beta/CompletionServiceClient.java

@@ -0,0 +1,278 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.discoveryengine.v1beta;
+
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.discoveryengine.v1beta.stub.CompletionServiceStub;
+import com.google.cloud.discoveryengine.v1beta.stub.CompletionServiceStubSettings;
+import java.io.IOException;
+import java.util.concurrent.TimeUnit;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Service Description: Service for Auto-Completion.
+ *
+ * <p>This class provides the ability to make remote calls to the backing service through method
+ * calls that map to API methods. Sample code to get started:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * try (CompletionServiceClient completionServiceClient = CompletionServiceClient.create()) {
+ *   CompleteQueryRequest request =
+ *       CompleteQueryRequest.newBuilder()
+ *           .setDataStore(
+ *               DataStoreName.ofProjectLocationDataStoreName(
+ *                       "[PROJECT]", "[LOCATION]", "[DATA_STORE]")
+ *                   .toString())
+ *           .setQuery("query107944136")
+ *           .setQueryModel("queryModel-184930495")
+ *           .setUserPseudoId("userPseudoId-1155274652")
+ *           .build();
+ *   CompleteQueryResponse response = completionServiceClient.completeQuery(request);
+ * }
+ * }</pre>
+ *
+ * <p>Note: close() needs to be called on the CompletionServiceClient object to clean up resources
+ * such as threads. In the example above, try-with-resources is used, which automatically calls
+ * close().
+ *
+ * <p>The surface of this class includes several types of Java methods for each of the API's
+ * methods:
+ *
+ * <ol>
+ *   <li>A "flattened" method. With this type of method, the fields of the request type have been
+ *       converted into function parameters. It may be the case that not all fields are available as
+ *       parameters, and not every API method will have a flattened method entry point.
+ *   <li>A "request object" method. This type of method only takes one parameter, a request object,
+ *       which must be constructed before the call. Not every API method will have a request object
+ *       method.
+ *   <li>A "callable" method. This type of method takes no parameters and returns an immutable API
+ *       callable object, which can be used to initiate calls to the service.
+ * </ol>
+ *
+ * <p>See the individual methods for example code.
+ *
+ * <p>Many parameters require resource names to be formatted in a particular way. To assist with
+ * these names, this class includes a format method for each type of name, and additionally a parse
+ * method to extract the individual identifiers contained within names that are returned.
+ *
+ * <p>This class can be customized by passing in a custom instance of CompletionServiceSettings to
+ * create(). For example:
+ *
+ * <p>To customize credentials:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * CompletionServiceSettings completionServiceSettings =
+ *     CompletionServiceSettings.newBuilder()
+ *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
+ *         .build();
+ * CompletionServiceClient completionServiceClient =
+ *     CompletionServiceClient.create(completionServiceSettings);
+ * }</pre>
+ *
+ * <p>To customize the endpoint:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * CompletionServiceSettings completionServiceSettings =
+ *     CompletionServiceSettings.newBuilder().setEndpoint(myEndpoint).build();
+ * CompletionServiceClient completionServiceClient =
+ *     CompletionServiceClient.create(completionServiceSettings);
+ * }</pre>
+ *
+ * <p>To use REST (HTTP1.1/JSON) transport (instead of gRPC) for sending and receiving requests over
+ * the wire:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+ * CompletionServiceSettings completionServiceSettings =
+ *     CompletionServiceSettings.newHttpJsonBuilder().build();
+ * CompletionServiceClient completionServiceClient =
+ *     CompletionServiceClient.create(completionServiceSettings);
+ * }</pre>
+ *
+ * <p>Please refer to the GitHub repository's samples for more quickstart code snippets.
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public class CompletionServiceClient implements BackgroundResource {
+  private final CompletionServiceSettings settings;
+  private final CompletionServiceStub stub;
+
+  /** Constructs an instance of CompletionServiceClient with default settings. */
+  public static final CompletionServiceClient create() throws IOException {
+    return create(CompletionServiceSettings.newBuilder().build());
+  }
+
+  /**
+   * Constructs an instance of CompletionServiceClient, using the given settings. The channels are
+   * created based on the settings passed in, or defaults for any settings that are not set.
+   */
+  public static final CompletionServiceClient create(CompletionServiceSettings settings)
+      throws IOException {
+    return new CompletionServiceClient(settings);
+  }
+
+  /**
+   * Constructs an instance of CompletionServiceClient, using the given stub for making calls. This
+   * is for advanced usage - prefer using create(CompletionServiceSettings).
+   */
+  public static final CompletionServiceClient create(CompletionServiceStub stub) {
+    return new CompletionServiceClient(stub);
+  }
+
+  /**
+   * Constructs an instance of CompletionServiceClient, using the given settings. This is protected
+   * so that it is easy to make a subclass, but otherwise, the static factory methods should be
+   * preferred.
+   */
+  protected CompletionServiceClient(CompletionServiceSettings settings) throws IOException {
+    this.settings = settings;
+    this.stub = ((CompletionServiceStubSettings) settings.getStubSettings()).createStub();
+  }
+
+  protected CompletionServiceClient(CompletionServiceStub stub) {
+    this.settings = null;
+    this.stub = stub;
+  }
+
+  public final CompletionServiceSettings getSettings() {
+    return settings;
+  }
+
+  public CompletionServiceStub getStub() {
+    return stub;
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Completes the specified user input with keyword suggestions.
+   *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+   * try (CompletionServiceClient completionServiceClient = CompletionServiceClient.create()) {
+   *   CompleteQueryRequest request =
+   *       CompleteQueryRequest.newBuilder()
+   *           .setDataStore(
+   *               DataStoreName.ofProjectLocationDataStoreName(
+   *                       "[PROJECT]", "[LOCATION]", "[DATA_STORE]")
+   *                   .toString())
+   *           .setQuery("query107944136")
+   *           .setQueryModel("queryModel-184930495")
+   *           .setUserPseudoId("userPseudoId-1155274652")
+   *           .build();
+   *   CompleteQueryResponse response = completionServiceClient.completeQuery(request);
+   * }
+   * }</pre>
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final CompleteQueryResponse completeQuery(CompleteQueryRequest request) {
+    return completeQueryCallable().call(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Completes the specified user input with keyword suggestions.
+   *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
+   * try (CompletionServiceClient completionServiceClient = CompletionServiceClient.create()) {
+   *   CompleteQueryRequest request =
+   *       CompleteQueryRequest.newBuilder()
+   *           .setDataStore(
+   *               DataStoreName.ofProjectLocationDataStoreName(
+   *                       "[PROJECT]", "[LOCATION]", "[DATA_STORE]")
+   *                   .toString())
+   *           .setQuery("query107944136")
+   *           .setQueryModel("queryModel-184930495")
+   *           .setUserPseudoId("userPseudoId-1155274652")
+   *           .build();
+   *   ApiFuture<CompleteQueryResponse> future =
+   *       completionServiceClient.completeQueryCallable().futureCall(request);
+   *   // Do something.
+   *   CompleteQueryResponse response = future.get();
+   * }
+   * }</pre>
+   */
+  public final UnaryCallable<CompleteQueryRequest, CompleteQueryResponse> completeQueryCallable() {
+    return stub.completeQueryCallable();
+  }
+
+  @Override
+  public final void close() {
+    stub.close();
+  }
+
+  @Override
+  public void shutdown() {
+    stub.shutdown();
+  }
+
+  @Override
+  public boolean isShutdown() {
+    return stub.isShutdown();
+  }
+
+  @Override
+  public boolean isTerminated() {
+    return stub.isTerminated();
+  }
+
+  @Override
+  public void shutdownNow() {
+    stub.shutdownNow();
+  }
+
+  @Override
+  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
+    return stub.awaitTermination(duration, unit);
+  }
+}