com.h3c.util.persistence.cassandra.query

Class ReadQueryLoggingDecorator<T,C>

java.lang.Object

com.h3c.util.persistence.cassandra.query.ReadQueryDecorator<T,C>

com.h3c.util.persistence.cassandra.query.ReadQueryLoggingDecorator<T,C>

Type Parameters:

T - Type of the result of the query

C - The context to execute the query.

All Implemented Interfaces:

ReadQuery<T,C>

public class ReadQueryLoggingDecorator<T,C>
extends ReadQueryDecorator<T,C>

ReadQueryLoggingDecorator is a concrete decorator for Read Query operations. This decorator provides the ability to log queries as they are executed. The DataStoreManager should decorate the queries to use this decorator if logging is enabled.
This decorator extends an abstract ReadQueryDecorator that caters to all types of concrete decorators for a Read Query.

Field Summary

Fields inherited from class com.h3c.util.persistence.cassandra.query.ReadQueryDecorator

delegate, log

Constructor Summary

Constructors

Constructor and Description
ReadQueryLoggingDecorator(ReadQuery<T,C> query, org.slf4j.Logger log) Decorator for read query operations to avail logging support.

Method Summary

Methods

Modifier and Type	Method and Description
T	execute(C context) Execute ReadQuery with logging.

Methods inherited from class java.lang.Object

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

Constructor Detail

ReadQueryLoggingDecorator

public ReadQueryLoggingDecorator(ReadQuery<T,C> query,
                         org.slf4j.Logger log)

Decorator for read query operations to avail logging support.

Parameters:

query - Query to be executed

log - Instance of slf4j logger framework.

Method Detail

execute

public T execute(C context)
          throws Exception

Execute ReadQuery with logging.

Parameters:

context - Context of the query.

Returns:

Result of ReadQuery operation.

Throws:

NullPointerException - In case of context is null.

Exception - Throws Exception in case of any error in query execute.