com.h3c.util.persistence.cassandra.query

Class TransReadQueryDecorator<T extends TransportObject<? super T,?>>

java.lang.Object

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

com.h3c.util.persistence.cassandra.query.TransReadQueryDecorator<T>

Type Parameters:

T - Type of the result of the query.

All Implemented Interfaces:

ReadQuery<T,DataStoreContext>

public class TransReadQueryDecorator<T extends TransportObject<? super T,?>>
extends ReadQueryDecorator<T,DataStoreContext>

TransReadQueryDecorator is a concrete decorator for read queries.
It provides the ability to lock the data during the read operation for the purposes of isolation.

Field Summary

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

delegate, log

Constructor Summary

Constructors

Constructor and Description
TransReadQueryDecorator(ReadQuery<T,DataStoreContext> query)

Method Summary

Methods

Modifier and Type	Method and Description
T	execute(DataStoreContext context) This is the single execute method provided by the ReadQuery interface.

Methods inherited from class java.lang.Object

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

Constructor Detail

TransReadQueryDecorator

public TransReadQueryDecorator(ReadQuery<T,DataStoreContext> query)

Method Detail

execute

public T execute(DataStoreContext context)
                                               throws Exception

Description copied from interface: ReadQuery

This is the single execute method provided by the ReadQuery interface. The application/business logic prepares a read query and as the last step, calls this method to transmit data to the underlying tiers. This data is read using DAO and Entity Manager.

Parameters:

context - - The DataStore context. Provides the context to the query.

Returns:

Transport object that has been read.

Throws:

Exception