Adding ResourceManagerExample

Author: Ajay Kannan

gcloud-java-examples/README.md

@@ -33,7 +33,7 @@ To run examples from your command line:
 
 1. Login using gcloud SDK (`gcloud auth login` in command line)
 
-2. Set your current project using `gcloud config set project PROJECT_ID`
+2. If you are running an example other than `ResourceManagerExample`, set your current project using `gcloud config set project PROJECT_ID`. If you are running `ResourceManagerExample`, unset your project by using `gcloud config unset project`.
 
 3. Compile using Maven (`mvn compile` in command line from your base project directory)
 
@@ -56,7 +56,16 @@ To run examples from your command line:
   $mvn exec:java -Dexec.mainClass="com.google.gcloud.examples.StorageExample" -Dexec.args="list <bucket_name>"
   $mvn exec:java -Dexec.mainClass="com.google.gcloud.examples.StorageExample" -Dexec.args="download <bucket_name> test.txt"
   $mvn exec:java -Dexec.mainClass="com.google.gcloud.examples.StorageExample" -Dexec.args="delete <bucket_name> test.txt"
-```
+  ```
+
+  Here's an example run of `ResourceManagerExample`.
+
+  Be sure to change the placeholder project ID "my-project-id" with your own globally unique project ID.
+  ```
+  $mvn exec:java -Dexec.mainClass="com.google.gcloud.examples.ResourceManagerExample" -Dexec.args="create my-project-id"
+  $mvn exec:java -Dexec.mainClass="com.google.gcloud.examples.ResourceManagerExample" -Dexec.args="list"
+  $mvn exec:java -Dexec.mainClass="com.google.gcloud.examples.ResourceManagerExample" -Dexec.args="get my-project-id"
+  ```
 
 Troubleshooting
 ---------------

gcloud-java-examples/src/main/java/com/google/gcloud/examples/ResourceManagerExample.java

@@ -0,0 +1,147 @@
+/*
+ * Copyright 2015 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.gcloud.examples;
+
+import com.google.gcloud.resourcemanager.ProjectInfo;
+import com.google.gcloud.resourcemanager.ResourceManager;
+import com.google.gcloud.resourcemanager.ResourceManagerOptions;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * An example of using the Google Cloud Resource Manager.
+ * <p>
+ * This example creates, gets, and lists projects.
+ * <p>
+ * Steps needed for running the example:<ol>
+ * <li>login using gcloud SDK - {@code gcloud auth login}.</li>
+ * <li>compile using maven - {@code mvn compile}</li>
+ * <li>run using maven - {@code mvn exec:java
+ * -Dexec.mainClass="com.google.gcloud.examples.ResourceManagerExample"
+ * -Dexec.args="[create|get|list projectId]"}</li>
+ * </ol>
+ */
+public class ResourceManagerExample {
+
+  private static final String DEFAULT_ACTION = "list";
+  private static final Map<String, ResourceManagerAction> ACTIONS = new HashMap<>();
+
+  private interface ResourceManagerAction {
+    void run(ResourceManager resourceManager, String... args);
+    String getRequiredParams();
+  }
+
+  private static class CreateAction implements ResourceManagerAction {
+    @Override
+    public void run(ResourceManager resourceManager, String... args) {
+      if (args.length > 0) {
+        String projectId = args[0];
+        ProjectInfo project = resourceManager.create(ProjectInfo.builder(projectId).build());
+        System.out.printf(
+            "Successfully created project '%s': %s.%n", projectId, projectDetails(project));
+      } else {
+        System.out.println("Error: must supply a globally unique project ID for your new project.");
+      }
+    }
+
+    @Override
+    public String getRequiredParams() {
+      return "projectId";
+    }
+  }
+
+  private static class GetAction implements ResourceManagerAction {
+    @Override
+    public void run(ResourceManager resourceManager, String... args) {
+      if (args.length > 0) {
+        String projectId = args[0];
+        ProjectInfo project = resourceManager.get(projectId);
+        if (project != null) {
+          System.out.printf(
+              "Successfully got project '%s': %s.%n", projectId, projectDetails(project));
+        } else {
+          System.out.printf("Could not find project '%s'.%n", projectId);
+        }
+      } else {
+        System.out.println(
+            "Error: must supply a project ID corresponding to a project for which you have viewing"
+            + " permissions. You can create a project and then call get using the same project ID"
+            + " if you have no other projects to use in this test.");
+      }
+    }
+
+    @Override
+    public String getRequiredParams() {
+      return "projectId";
+    }
+  }
+
+  private static class ListAction implements ResourceManagerAction {
+    @Override
+    public void run(ResourceManager resourceManager, String... args) {
+      System.out.println("Projects you can view:");
+      for (ProjectInfo project : resourceManager.list().values()) {
+        System.out.println(projectDetails(project));
+      }
+    }
+
+    @Override
+    public String getRequiredParams() {
+      return "";
+    }
+  }
+
+  static {
+    ACTIONS.put("create", new CreateAction());
+    ACTIONS.put("get", new GetAction());
+    ACTIONS.put("list", new ListAction());
+  }
+
+  private static String projectDetails(ProjectInfo project) {
+    return "{projectId:" + project.projectId() + ", projectNumber:" + project.projectNumber()
+        + ", createTimeMillis:" + project.createTimeMillis() + ", state:" + project.state() + "}";
+  }
+
+  public static void main(String... args) {
+    String actionName = args.length > 0 ? args[0].toLowerCase() : DEFAULT_ACTION;
+    ResourceManagerAction action = ACTIONS.get(actionName);
+    if (action == null) {
+      StringBuilder actionAndParams = new StringBuilder();
+      for (Map.Entry<String, ResourceManagerAction> entry : ACTIONS.entrySet()) {
+        actionAndParams.append(entry.getKey());
+        String param = entry.getValue().getRequiredParams();
+        if (param != null && !param.isEmpty()) {
+          actionAndParams.append(' ').append(param);
+        }
+        actionAndParams.append('|');
+      }
+      actionAndParams.setLength(actionAndParams.length() - 1);
+      System.out.printf(
+          "Usage: %s [%s]%n", ResourceManagerExample.class.getSimpleName(), actionAndParams);
+      return;
+    }
+
+    // If you want to access a local Resource Manager emulator (after creating and starting the
+    // LocalResourceManagerHelper), use the following code instead:
+    // ResourceManager resourceManager = LocalResourceManagerHelper.options().service();
+    ResourceManager resourceManager = ResourceManagerOptions.defaultInstance().service();
+    args = args.length > 1 ? Arrays.copyOfRange(args, 1, args.length) : new String[] {};
+    action.run(resourceManager, args);
+  }
+}