Examples with OperationsClient com.google.longrunning.OperationsClient used on opensource projects

Example 1 with OperationsClient

use of com.google.longrunning.OperationsClient in project java-automl by googleapis.

the class ListOperationStatusTest method setUp.

@Before
public void setUp() throws IOException, InterruptedException {
    bout = new ByteArrayOutputStream();
    out = new PrintStream(bout);
    originalPrintStream = System.out;
    System.setOut(out);
    // if the LRO status count more than 300, delete half of operations.
    try (AutoMlClient client = AutoMlClient.create()) {
        OperationsClient operationsClient = client.getOperationsClient();
        LocationName projectLocation = LocationName.of(PROJECT_ID, "us-central1");
        ListOperationsRequest listRequest = ListOperationsRequest.newBuilder().setName(projectLocation.toString()).build();
        List<String> operationFullPathsToBeDeleted = new ArrayList<>();
        for (Operation operation : operationsClient.listOperations(listRequest).iterateAll()) {
            // Filter: deleting already done operations.
            if (operation.getDone() && !operation.hasError()) {
                operationFullPathsToBeDeleted.add(operation.getName());
            }
        }
        if (operationFullPathsToBeDeleted.size() > 300) {
            System.out.println("Cleaning up...");
            for (String operationFullPath : operationFullPathsToBeDeleted.subList(0, operationFullPathsToBeDeleted.size() / 2)) {
                // retry_interval * (random value in range [1 - rand_factor, 1 + rand_factor])
                ExponentialBackOff exponentialBackOff = new ExponentialBackOff.Builder().setInitialIntervalMillis(60000).setMaxElapsedTimeMillis(300000).setRandomizationFactor(0.5).setMultiplier(1.1).setMaxIntervalMillis(80000).build();
                // delete unused operations.
                try {
                    operationsClient.deleteOperation(operationFullPath);
                } catch (ResourceExhaustedException ex) {
                    // exponential back off and retry.
                    long backOffInMillis = exponentialBackOff.nextBackOffMillis();
                    System.out.printf("Backing off for %d milliseconds " + "due to Resource exhaustion.\n", backOffInMillis);
                    if (backOffInMillis < 0) {
                        break;
                    }
                    System.out.println("Backing off" + backOffInMillis);
                    TimeUnit.MILLISECONDS.sleep(backOffInMillis);
                } catch (Exception ex) {
                    throw ex;
                }
            }
        } else {
            // Clear the list since we wont anything with the list.
            operationFullPathsToBeDeleted.clear();
        }
    }
}