Example usage for com.amazonaws.waiters PollingStrategy PollingStrategy

Introduction

In this page you can find the example usage for com.amazonaws.waiters PollingStrategy PollingStrategy.

Prototype

public PollingStrategy(RetryStrategy retryStrategy, DelayStrategy delayStrategy) 

Source Link

Document

Constructs a new PollingStrategy with RetryStrategy and DelayStrategy defined

Usage

From source file:org.springframework.integration.aws.metadata.DynamoDbMetaDataStore.java

License:Apache License

@Override
public void afterPropertiesSet() throws Exception {
    try {/*from www.  j ava2s .  co  m*/
        this.table.describe();
        createTableLatch.countDown();
        return;
    } catch (ResourceNotFoundException e) {
        if (logger.isInfoEnabled()) {
            logger.info("No table '" + this.table.getTableName() + "'. Creating one...");
        }
    }

    CreateTableRequest createTableRequest = new CreateTableRequest().withTableName(this.table.getTableName())
            .withKeySchema(new KeySchemaElement(KEY, KeyType.HASH))
            .withAttributeDefinitions(new AttributeDefinition(KEY, ScalarAttributeType.S))
            .withProvisionedThroughput(new ProvisionedThroughput(this.readCapacity, this.writeCapacity));

    this.dynamoDB.createTableAsync(createTableRequest,
            new AsyncHandler<CreateTableRequest, CreateTableResult>() {

                @Override
                public void onError(Exception e) {
                    logger.error(
                            "Cannot create DynamoDb table: " + DynamoDbMetaDataStore.this.table.getTableName(),
                            e);
                    DynamoDbMetaDataStore.this.createTableLatch.countDown();
                }

                @Override
                public void onSuccess(CreateTableRequest request, CreateTableResult createTableResult) {
                    Waiter<DescribeTableRequest> waiter = DynamoDbMetaDataStore.this.dynamoDB.waiters()
                            .tableExists();

                    WaiterParameters<DescribeTableRequest> waiterParameters = new WaiterParameters<>(
                            new DescribeTableRequest(DynamoDbMetaDataStore.this.table.getTableName()))
                                    .withPollingStrategy(new PollingStrategy(new MaxAttemptsRetryStrategy(25),
                                            new FixedDelayStrategy(1)));

                    waiter.runAsync(waiterParameters, new WaiterHandler<DescribeTableRequest>() {

                        @Override
                        public void onWaitSuccess(DescribeTableRequest request) {
                            DynamoDbMetaDataStore.this.createTableLatch.countDown();
                            DynamoDbMetaDataStore.this.table.describe();
                        }

                        @Override
                        public void onWaitFailure(Exception e) {
                            logger.error("Cannot describe DynamoDb table: "
                                    + DynamoDbMetaDataStore.this.table.getTableName(), e);
                            DynamoDbMetaDataStore.this.createTableLatch.countDown();
                        }

                    });
                }

            });
}

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