org.apache.hadoop.hive.metastore.txn.retry

Class SqlRetryHandler

java.lang.Object

org.apache.hadoop.hive.metastore.txn.retry.SqlRetryHandler

public class SqlRetryHandler
extends Object

Supports building resilient APIs by automatically retrying failed function calls.

Constructor Summary

Constructors

Constructor and Description
SqlRetryHandler(org.apache.hadoop.conf.Configuration conf, DatabaseProduct databaseProduct)

Method Summary

Modifier and Type	Method and Description
<Result> Result	executeWithRetry(SqlRetryCallProperties properties, SqlRetryFunction<Result> function) Executes the passed SqlRetryFunction and automatically retries the execution in case of failure.
static String	getMessage(Exception ex)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SqlRetryHandler

public SqlRetryHandler(org.apache.hadoop.conf.Configuration conf,
                       DatabaseProduct databaseProduct)

Method Detail

getMessage

public static String getMessage(Exception ex)

executeWithRetry

public <Result> Result executeWithRetry(SqlRetryCallProperties properties,
                                        SqlRetryFunction<Result> function)
                                 throws org.apache.thrift.TException

Executes the passed SqlRetryFunction and automatically retries the execution in case of failure. If there is a retry-call upper in the call hierarchy, SqlRetryCallProperties.withRetryPropagation(org.apache.hadoop.hive.metastore.txn.retry.RetryPropagation) can be used to control wether to join it or create a nested retry-call.

Type Parameters:

Result - Type of the result

Parameters:

properties - SqlRetryCallProperties instance used to fine-tune/alter the execution-mechanism.

function - The SqlRetryFunction to execute.

Returns:

Returns with the result of the execution of the passed SqlRetryFunction.

Throws:

MetaException - Thrown in case of execution error.

org.apache.thrift.TException