PublisherClient/SubscriberClient snippets (googleapis#1663)

adding snippets for PublisherClient, SubscriberClient

google-cloud-examples/src/main/java/com/google/cloud/examples/pubsub/snippets/MessageReceiverSnippets.java

@@ -16,8 +16,8 @@
 
 /*
  * EDITING INSTRUCTIONS
- * This file is referenced in Subscriber's javadoc. Any change to this file should be reflected in
- * PubSub's javadoc.
+ * This file is referenced in MessageReceiver's javadoc.
+ * Any change to this file should be reflected in MessageReceiver's javadoc.
  */
 
 package com.google.cloud.examples.pubsub.snippets;
@@ -28,6 +28,8 @@
 import com.google.pubsub.v1.PubsubMessage;
 import java.util.concurrent.BlockingQueue;
 
+/** This class contains snippets for the {@link MessageReceiver} interface. */
+
 public class MessageReceiverSnippets {
   private final BlockingQueue<PubsubMessage> blockingQueue;
 

google-cloud-examples/src/main/java/com/google/cloud/examples/pubsub/snippets/PublisherClientSnippets.java

@@ -0,0 +1,169 @@
+/*
+ * Copyright 2017 Google Inc. All Rights Reserved.
+ *
+ * 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
+ *
+ *       http://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.examples.pubsub.snippets;
+
+import com.google.cloud.Identity;
+import com.google.cloud.Role;
+import com.google.cloud.ServiceOptions;
+import com.google.cloud.pubsub.spi.v1.PagedResponseWrappers.ListTopicSubscriptionsPagedResponse;
+import com.google.cloud.pubsub.spi.v1.PagedResponseWrappers.ListTopicsPagedResponse;
+import com.google.cloud.pubsub.spi.v1.PublisherClient;
+import com.google.iam.v1.Binding;
+import com.google.iam.v1.Policy;
+import com.google.iam.v1.TestIamPermissionsResponse;
+import com.google.pubsub.v1.ListTopicSubscriptionsRequest;
+import com.google.pubsub.v1.ListTopicsRequest;
+import com.google.pubsub.v1.ProjectName;
+import com.google.pubsub.v1.Topic;
+import com.google.pubsub.v1.TopicName;
+import java.util.LinkedList;
+import java.util.List;
+
+/** This class contains a number of snippets for the {@link PublisherClient} interface. */
+public class PublisherClientSnippets {
+
+  private final String projectId;
+
+  public PublisherClientSnippets() {
+    this.projectId = ServiceOptions.getDefaultProjectId();
+  }
+
+  public String getProjectId() {
+    return projectId;
+  }
+
+  /** Example of creating a topic. */
+  public Topic createTopic(String topicId) throws Exception {
+    try (PublisherClient publisherClient = PublisherClient.create()) {
+      // [START createTopic]
+      TopicName topicName = TopicName.create(projectId, topicId);
+      Topic topic = publisherClient.createTopic(topicName);
+      // [END createTopic]
+      return topic;
+    }
+  }
+
+  /** Example of listing topics.  */
+  public ListTopicsPagedResponse listTopics() throws Exception {
+    try (PublisherClient publisherClient = PublisherClient.create()) {
+      // [START listTopics]
+      ListTopicsRequest listTopicsRequest =
+          ListTopicsRequest.newBuilder()
+              .setProjectWithProjectName(ProjectName.create(projectId))
+              .build();
+      ListTopicsPagedResponse response = publisherClient.listTopics(listTopicsRequest);
+      Iterable<Topic> topics = response.iterateAllElements();
+      for (Topic topic : topics) {
+        // do something with the topic
+      }
+      // [END listTopics]
+      return response;
+    }
+  }
+
+  /** Example of listing topics for a subscription. */
+  public ListTopicSubscriptionsPagedResponse listTopicSubscriptions(String topicId)
+      throws Exception {
+    try (PublisherClient publisherClient = PublisherClient.create()) {
+      // [START listTopicSubscriptions]
+      TopicName topicName = TopicName.create(projectId, topicId);
+      ListTopicSubscriptionsRequest request =
+          ListTopicSubscriptionsRequest.newBuilder()
+              .setTopicWithTopicName(topicName)
+              .build();
+      ListTopicSubscriptionsPagedResponse response =
+          publisherClient.listTopicSubscriptions(request);
+      Iterable<String> subscriptionNames = response.iterateAllElements();
+      for (String subscriptionName : subscriptionNames) {
+        // do something with the subscription name
+      }
+      // [END listTopicSubscriptions]
+      return response;
+    }
+  }
+
+  /** Example of deleting a topic. */
+  public TopicName deleteTopic(String topicId) throws Exception {
+    try (PublisherClient publisherClient = PublisherClient.create()) {
+      // [START deleteTopic]
+      TopicName topicName = TopicName.create(projectId, topicId);
+      publisherClient.deleteTopic(topicName);
+      // [END deleteTopic]
+      return topicName;
+    }
+  }
+
+  /** Example of getting a topic policy. */
+  public Policy getTopicPolicy(String topicId) throws Exception {
+    try (PublisherClient publisherClient = PublisherClient.create()) {
+      // [START getTopicPolicy]
+      TopicName topicName = TopicName.create(projectId, topicId);
+      Policy policy = publisherClient.getIamPolicy(topicName.toString());
+      if (policy == null) {
+        // topic iam policy was not found
+      }
+      // [END getTopicPolicy]
+      return policy;
+    }
+  }
+
+  /** Example of replacing a topic policy. */
+  public Policy replaceTopicPolicy(String topicId) throws Exception {
+    try (PublisherClient publisherClient = PublisherClient.create()) {
+      // [START replaceTopicPolicy]
+      String topicName = TopicName.create(projectId, topicId).toString();
+      Policy policy = publisherClient.getIamPolicy(topicName);
+      // add role -> members binding
+      Binding binding =
+          Binding.newBuilder()
+              .setRole(Role.viewer().toString())
+              .addMembers(Identity.allAuthenticatedUsers().toString())
+              .build();
+      // create updated policy
+      Policy updatedPolicy = Policy.newBuilder(policy).addBindings(binding).build();
+      updatedPolicy = publisherClient.setIamPolicy(topicName, updatedPolicy);
+      // [END replaceTopicPolicy]
+      return updatedPolicy;
+    }
+  }
+
+  /** Example of testing whether the caller has the provided permissions on a topic.
+   * Only viewer, editor or admin/owner can view results of pubsub.topics.get  */
+  public TestIamPermissionsResponse testTopicPermissions(String topicId) throws Exception {
+    try (PublisherClient publisherClient = PublisherClient.create()) {
+      // [START testTopicPermissions]
+      List<String> permissions = new LinkedList<>();
+      permissions.add("pubsub.topics.get");
+      TopicName topicName = TopicName.create(projectId, topicId);
+      TestIamPermissionsResponse testedPermissions =
+          publisherClient.testIamPermissions(topicName.toString(), permissions);
+      // [END testTopicPermissions]
+      return testedPermissions;
+    }
+  }
+
+  /** Example of getting a topic. */
+  public Topic getTopic(String topicId) throws Exception {
+    try (PublisherClient publisherClient = PublisherClient.create()) {
+      // [START getTopic]
+      TopicName topicName = TopicName.create(projectId, topicId);
+      Topic topic = publisherClient.getTopic(topicName);
+      // [END createTopic]
+      return topic;
+    }
+  }
+}

google-cloud-examples/src/main/java/com/google/cloud/examples/pubsub/snippets/PublisherSnippets.java

@@ -14,6 +14,12 @@
  * limitations under the License.
  */
 
+/*
+ * EDITING INSTRUCTIONS
+ * This file is referenced in Publisher's javadoc. Any change to this file should be reflected in
+ * Publisher's javadoc.
+ */
+
 package com.google.cloud.examples.pubsub.snippets;
 
 import com.google.api.gax.core.RpcFuture;
@@ -23,39 +29,37 @@
 import com.google.pubsub.v1.PubsubMessage;
 import com.google.pubsub.v1.TopicName;
 
+/** This class contains snippets for the {@link Publisher} interface. */
 public class PublisherSnippets {
   private final Publisher publisher;
 
   public PublisherSnippets(Publisher publisher) {
     this.publisher = publisher;
   }
 
-  /**
-   * Example of publishing a message.
-   */
+  /** Example of publishing a message. */
   // [TARGET publish(PubsubMessage)]
   // [VARIABLE "my_message"]
   public RpcFuture<String> publish(String message) {
     // [START publish]
     ByteString data = ByteString.copyFromUtf8(message);
     PubsubMessage pubsubMessage = PubsubMessage.newBuilder().setData(data).build();
     RpcFuture<String> messageIdFuture = publisher.publish(pubsubMessage);
-    messageIdFuture.addCallback(new RpcFutureCallback<String>() {
-      public void onSuccess(String messageId) {
-        System.out.println("published with message id: " + messageId);
-      }
+    messageIdFuture.addCallback(
+        new RpcFutureCallback<String>() {
+          public void onSuccess(String messageId) {
+            System.out.println("published with message id: " + messageId);
+          }
 
-      public void onFailure(Throwable t) {
-        System.out.println("failed to publish: " + t);
-      }
-    });
+          public void onFailure(Throwable t) {
+            System.out.println("failed to publish: " + t);
+          }
+        });
     // [END publish]
     return messageIdFuture;
   }
 
-  /**
-   * Example of creating a {@code Publisher}.
-   */
+  /** Example of creating a {@code Publisher}. */
   // [TARGET newBuilder(TopicName)]
   // [VARIABLE "my_project"]
   // [VARIABLE "my_topic"]