chore(spanner): Update instance region (googleapis#3228)

Author: harshachinta

google-cloud-spanner/src/test/java/com/google/cloud/spanner/IntegrationTestEnv.java

@@ -147,7 +147,7 @@ protected void after() {
  private void initializeInstance(InstanceId instanceId) throws Exception {
  InstanceConfig instanceConfig;
  try {
- instanceConfig = instanceAdminClient.getInstanceConfig("regional-us-central1");
+ instanceConfig = instanceAdminClient.getInstanceConfig("regional-us-east4");
  } catch (Throwable ignore) {
  instanceConfig =
  Iterators.get(instanceAdminClient.listInstanceConfigs().iterateAll().iterator(), 0, null);

samples/native-image/src/main/java/com/example/spanner/InstanceOperations.java

@@ -35,7 +35,7 @@ static void createTestInstance(
 
  InstanceInfo instanceInfo =
  InstanceInfo.newBuilder(InstanceId.of(projectId, instanceId))
- .setInstanceConfigId(InstanceConfigId.of(projectId, "regional-us-central1"))
+ .setInstanceConfigId(InstanceConfigId.of(projectId, "regional-us-east4"))
  .setNodeCount(1)
  .setDisplayName(instanceId)
  .build();

samples/snippets/src/main/java/com/example/spanner/CreateInstanceExample.java

@@ -47,9 +47,9 @@ static void createInstance(String projectId, String instanceId) {
  .setDisplayName(displayName)
  .setNodeCount(nodeCount)
  .setConfig(
- InstanceConfigName.of(projectId, "regional-us-central1").toString())
+ InstanceConfigName.of(projectId, "regional-us-east4").toString())
  .build();
- 
+
  try (Spanner spanner =
  SpannerOptions.newBuilder()
  .setProjectId(projectId)
@@ -74,4 +74,4 @@ static void createInstance(String projectId, String instanceId) {
  }
  }
 }
-//[END spanner_create_instance]
+//[END spanner_create_instance]

samples/snippets/src/main/java/com/example/spanner/CreateInstanceWithAutoscalingConfigExample.java

@@ -45,7 +45,7 @@ static void createInstance(String projectId, String instanceId) {
  .getService();
  InstanceAdminClient instanceAdminClient = spanner.createInstanceAdminClient()) {
  // Set Instance configuration.
- String configId = "regional-us-central1";
+ String configId = "regional-us-east4";
  String displayName = "Descriptive name";
 
  // Create an autoscaling config.

samples/snippets/src/main/java/com/example/spanner/CreateInstanceWithProcessingUnitsExample.java

@@ -44,7 +44,7 @@ static void createInstance(String projectId, String instanceId) {
  InstanceAdminClient instanceAdminClient = spanner.createInstanceAdminClient()) {
 
  // Set Instance configuration.
- String configId = "regional-us-central1";
+ String configId = "regional-us-east4";
  // This will create an instance with the processing power of 0.2 nodes.
  int processingUnits = 500;
  String displayName = "Descriptive name";

samples/snippets/src/main/java/com/example/spanner/admin/archived/CreateInstanceExample.java

@@ -42,7 +42,7 @@ static void createInstance(String projectId, String instanceId) {
  InstanceAdminClient instanceAdminClient = spanner.getInstanceAdminClient();
 
  // Set Instance configuration.
- String configId = "regional-us-central1";
+ String configId = "regional-us-east4";
  int nodeCount = 2;
  String displayName = "Descriptive name";
 

samples/snippets/src/main/java/com/example/spanner/admin/archived/CreateInstanceWithAutoscalingConfigExample.java

@@ -44,7 +44,7 @@ static void createInstance(String projectId, String instanceId) {
  InstanceAdminClient instanceAdminClient = spanner.getInstanceAdminClient();
 
  // Set Instance configuration.
- String configId = "regional-us-central1";
+ String configId = "regional-us-east4";
  // Create an autoscaling config.
  AutoscalingConfig autoscalingConfig =
  AutoscalingConfig.newBuilder()

samples/snippets/src/main/java/com/example/spanner/admin/archived/CreateInstanceWithProcessingUnitsExample.java

@@ -42,7 +42,7 @@ static void createInstance(String projectId, String instanceId) {
  InstanceAdminClient instanceAdminClient = spanner.getInstanceAdminClient();
 
  // Set Instance configuration.
- String configId = "regional-us-central1";
+ String configId = "regional-us-east4";
  // This will create an instance with the processing power of 0.2 nodes.
  int processingUnits = 500;
  String displayName = "Descriptive name";