org.springframework.data.cassandra.core.cql

Class CassandraExceptionTranslator

java.lang.Object

org.springframework.data.cassandra.core.cql.CassandraExceptionTranslator

All Implemented Interfaces:

PersistenceExceptionTranslator, CqlExceptionTranslator

public class CassandraExceptionTranslator
extends Object
implements CqlExceptionTranslator

Simple PersistenceExceptionTranslator for Cassandra.

Convert the given runtime exception to an appropriate exception from the org.springframework.dao hierarchy. Preserves exception if it's already a DataAccessException and ignores non DriverExceptions returning null. Falls back to CassandraUncategorizedException in case there's no mapping to a more detailed exception.

Author:

Alex Shvid, Matthew T. Adams, Mark Paluch

Constructor Summary

Constructors

Constructor and Description
CassandraExceptionTranslator()

Method Summary

Modifier and Type	Method and Description
protected String	buildMessage(String task, String cql, RuntimeException ex) Build a message String for the given DriverException.
DataAccessException	translate(String task, String cql, RuntimeException exception) Translate the given RuntimeException into a generic DataAccessException.
DataAccessException	translateExceptionIfPossible(RuntimeException exception)

Methods inherited from class java.lang.Object

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

Constructor Detail

CassandraExceptionTranslator

public CassandraExceptionTranslator()

Method Detail

translateExceptionIfPossible

@Nullable
public DataAccessException translateExceptionIfPossible(RuntimeException exception)

Specified by:

translateExceptionIfPossible in interface PersistenceExceptionTranslator

translate

public DataAccessException translate(@Nullable
                                     String task,
                                     @Nullable
                                     String cql,
                                     RuntimeException exception)

Description copied from interface: CqlExceptionTranslator

Translate the given RuntimeException into a generic DataAccessException.

The returned DataAccessException is supposed to contain the original DriverException as root cause. However, client code may not generally rely on this due to DataAccessExceptions possibly being caused by other resource APIs as well. That said, a getRootCause() instanceof DataAccessException check (and subsequent cast) is considered reliable when expecting Cassandra-based access to have happened.

Specified by:

translate in interface CqlExceptionTranslator

Parameters:

task - readable text describing the task being attempted.

cql - CQL query or update that caused the problem (may be null).

exception - the offending DriverException.

Returns:

the DataAccessException, wrapping the RuntimeException.

See Also:

NestedRuntimeException.getRootCause()

buildMessage

protected String buildMessage(@Nullable
                              String task,
                              @Nullable
                              String cql,
                              RuntimeException ex)

Build a message String for the given DriverException.

To be called by translator subclasses when creating an instance of a generic DataAccessException class.

Parameters:

task - readable text describing the task being attempted

cql - the CQL statement that caused the problem (may be null)

ex - the offending DriverException

Returns:

the message String to use