Add SetBidModifier example (#232)

* Add SetBidModifier example

* Rename example and add criterion param

* Add bidModifier param

Author: devchas

google-ads-examples/src/main/java/com/google/ads/googleads/examples/campaignmanagement/UpdateCampaignCriterionBidModifier.java

@@ -0,0 +1,152 @@
+// Copyright 2020 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.ads.googleads.examples.campaignmanagement;
+
+import com.beust.jcommander.Parameter;
+import com.google.ads.googleads.examples.utils.ArgumentNames;
+import com.google.ads.googleads.examples.utils.CodeSampleParams;
+import com.google.ads.googleads.lib.GoogleAdsClient;
+import com.google.ads.googleads.lib.utils.FieldMasks;
+import com.google.ads.googleads.v2.common.DeviceInfo;
+import com.google.ads.googleads.v2.enums.DeviceEnum.Device;
+import com.google.ads.googleads.v2.services.CampaignCriterionOperation;
+import com.google.ads.googleads.v2.errors.GoogleAdsError;
+import com.google.ads.googleads.v2.errors.GoogleAdsException;
+import com.google.ads.googleads.v2.resources.CampaignCriterion;
+import com.google.ads.googleads.v2.services.CampaignCriterionServiceClient;
+import com.google.ads.googleads.v2.services.MutateCampaignCriteriaResponse;
+import com.google.ads.googleads.v2.services.MutateCampaignCriterionResult;
+import com.google.ads.googleads.v2.utils.ResourceNames;
+import com.google.common.collect.ImmutableList;
+import com.google.protobuf.FloatValue;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+
+/** Updates a campaign criterion with a new bid modifier. */
+public class UpdateCampaignCriterionBidModifier {
+
+  private static class UpdateCampaignCriterionBidModifierParams extends CodeSampleParams {
+
+    @Parameter(names = ArgumentNames.CUSTOMER_ID, required = true)
+    private Long customerId;
+
+    @Parameter(names = ArgumentNames.CAMPAIGN_ID, required = true)
+    private Long campaignId;
+
+    @Parameter(names = ArgumentNames.CRITERION_ID, required = true)
+    private Long criterionId;
+
+    /** Specify the bid modifier value here or the default specified below will be used. */
+    @Parameter(names = ArgumentNames.BID_MODIFIER)
+    private Float bidModifier = 1.5f;
+  }
+
+  public static void main(String[] args) throws IOException {
+    UpdateCampaignCriterionBidModifierParams params =
+        new UpdateCampaignCriterionBidModifierParams();
+    if (!params.parseArguments(args)) {
+
+      // Either pass the required parameters for this example on the command line, or insert them
+      // into the code here. See the parameter class definition above for descriptions.
+      params.customerId = Long.parseLong("INSERT_CUSTOMER_ID_HERE");
+      params.campaignId = Long.parseLong("INSERT_CAMPAIGN_ID_HERE");
+      params.criterionId = Long.parseLong("INSERT_CRITERION_ID_HERE");
+      // Optional: To use a different bid modifier value from the default (1.5f), uncomment
+      // the line below and insert the desired bid modifier value.
+      // params.bidModifier = Float.parseFloat("INSERT_BID_MODIFIER_VALUE_HERE");
+    }
+
+    GoogleAdsClient googleAdsClient;
+    try {
+      googleAdsClient = GoogleAdsClient.newBuilder().fromPropertiesFile().build();
+    } catch (FileNotFoundException fnfe) {
+      System.err.printf(
+          "Failed to load GoogleAdsClient configuration from file. Exception: %s%n", fnfe);
+      return;
+    } catch (IOException ioe) {
+      System.err.printf("Failed to create GoogleAdsClient. Exception: %s%n", ioe);
+      return;
+    }
+
+    try {
+      new UpdateCampaignCriterionBidModifier().runExample(
+          googleAdsClient,
+          params.customerId,
+          params.campaignId,
+          params.criterionId,
+          params.bidModifier);
+    } catch (GoogleAdsException gae) {
+      // GoogleAdsException is the base class for most exceptions thrown by an API request.
+      // Instances of this exception have a message and a GoogleAdsFailure that contains a
+      // collection of GoogleAdsErrors that indicate the underlying causes of the
+      // GoogleAdsException.
+      System.err.printf(
+          "Request ID %s failed due to GoogleAdsException. Underlying errors:%n",
+          gae.getRequestId());
+      int i = 0;
+      for (GoogleAdsError googleAdsError : gae.getGoogleAdsFailure().getErrorsList()) {
+        System.err.printf("  Error %d: %s%n", i++, googleAdsError);
+      }
+    }
+  }
+
+  /**
+   * Runs the example.
+   *
+   * @param googleAdsClient the Google Ads API client.
+   * @param customerId the client customer ID.
+   * @param campaignId the campaign ID.
+   * @param criterionId the ID of the criterion to be updated.
+   * @param bidModifier the bid modifier for the campaign criterion.
+   * @throws GoogleAdsException if an API request failed with one or more service errors.
+   */
+  private void runExample(
+      GoogleAdsClient googleAdsClient,
+      long customerId,
+      long campaignId,
+      long criterionId,
+      float bidModifier) {
+    // Creates the criterion resource name.
+    String criterionResourceName =
+        ResourceNames.campaignCriterion(customerId, campaignId, criterionId);
+
+    // Creates the CampaignCriterion.
+    CampaignCriterion campaignCriterion = CampaignCriterion.newBuilder()
+        .setResourceName(criterionResourceName)
+        .setBidModifier(FloatValue.of(bidModifier))
+        .setDevice(DeviceInfo.newBuilder().setType(Device.MOBILE).build())
+        .build();
+
+    // Creates the operation.
+    CampaignCriterionOperation operation =
+      CampaignCriterionOperation.newBuilder()
+          .setUpdate(campaignCriterion)
+          .setUpdateMask(FieldMasks.allSetFieldsOf(campaignCriterion))
+          .build();
+
+    // Creates the CampaignCriterionServiceClient.
+    try (CampaignCriterionServiceClient campaignCriterionServiceClient =
+        googleAdsClient.getLatestVersion().createCampaignCriterionServiceClient()) {
+      // Adds the CampaignCriterion.
+      MutateCampaignCriteriaResponse response =
+          campaignCriterionServiceClient.mutateCampaignCriteria(
+              Long.toString(customerId), ImmutableList.of(operation));
+      for (MutateCampaignCriterionResult result : response.getResultsList()) {
+        System.out.printf("Campaign criterion with resource name '%s' was modified.%n",
+            result.getResourceName());
+      }
+    }
+  }
+}