static void listInstanceConfigOperations() {

// TODO(developer): Replace these variables before running the sample.

String projectId = "my-project";

listInstanceConfigOperations(projectId);

}

static void listInstanceConfigOperations(String projectId) {

try (Spanner spanner =

SpannerOptions.newBuilder()

.setProjectId(projectId)

.build()

.getService();

InstanceAdminClient instanceAdminClient = spanner.createInstanceAdminClient()) {

final ProjectName projectName = ProjectName.of(projectId);

System.out.printf(

"Getting list of instance config operations for project %s...\n",

projectId);

final ListInstanceConfigOperationsRequest request =

ListInstanceConfigOperationsRequest.newBuilder()

.setParent(projectName.toString())

.setFilter("(metadata.@type=type.googleapis.com/"

+ "google.spanner.admin.instance.v1.CreateInstanceConfigMetadata)").build();

final Iterable<Operation> instanceConfigOperations =

instanceAdminClient.listInstanceConfigOperations(request).iterateAll();

for (Operation operation : instanceConfigOperations) {

CreateInstanceConfigMetadata metadata =

operation.getMetadata().unpack(CreateInstanceConfigMetadata.class);

System.out.printf(

"Create instance config operation for %s is %d%% completed.\n",

metadata.getInstanceConfig().getName(), metadata.getProgress().getProgressPercent());

}

System.out.printf(

"Obtained list of instance config operations for project %s...\n",

projectName);

} catch (InvalidProtocolBufferException e) {

System.out.printf(

"Error: Listing instance config operations failed with error message %s\n",

e.getMessage());

}

}