com.jcabi.dynamo

Class ScanValve

java.lang.Object

com.jcabi.dynamo.ScanValve

All Implemented Interfaces:

Valve

@Immutable
 @Loggable(value=1)
public final class ScanValve
extends Object
implements Valve

Scan-based valve.

Since:

0.1

Version:

$Id: b65ea98c5a4b92b906eb26f2144bfa5358cf7283 $

Author:

Yegor Bugayenko (yegor@tpc2.com)

Constructor Summary

Constructors

Constructor and Description
ScanValve() Public ctor.

Method Summary

Modifier and Type	Method and Description
int	count(Credentials credentials, String table, Map<String,com.amazonaws.services.dynamodbv2.model.Condition> conditions) Count items.
Dosage	fetch(Credentials credentials, String table, Map<String,com.amazonaws.services.dynamodbv2.model.Condition> conditions, Collection<String> keys) Fetch the first dosage.
ScanValve	withAttributeToGet(String... names) With these extra attributes to pre-fetch.
ScanValve	withAttributeToGet(String name) With this extra attribute to pre-fetch.
ScanValve	withLimit(int lmt) With given limit.

Methods inherited from class java.lang.Object

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

Constructor Detail

ScanValve

public ScanValve()

Public ctor.

Method Detail

fetch

public Dosage fetch(Credentials credentials,
                    String table,
                    Map<String,com.amazonaws.services.dynamodbv2.model.Condition> conditions,
                    Collection<String> keys)
             throws IOException

Description copied from interface: Valve

Fetch the first dosage.

Specified by:

fetch in interface Valve

Parameters:

credentials - Credentials to AWS

table - Table name

conditions - Conditions

keys - Keys of the table

Returns:

Dosage

Throws:

IOException - In case of DynamoDB failure

count

public int count(Credentials credentials,
                 String table,
                 Map<String,com.amazonaws.services.dynamodbv2.model.Condition> conditions)

Description copied from interface: Valve

Count items.

Specified by:

count in interface Valve

Parameters:

credentials - Credentials to AWS

table - Table name

conditions - Conditions

Returns:

Total count of the

withLimit

public ScanValve withLimit(int lmt)

With given limit.

Parameters:

lmt - Limit to use

Returns:

New query valve

withAttributeToGet

public ScanValve withAttributeToGet(String name)

With this extra attribute to pre-fetch.

Parameters:

name - Name of attribute to pre-load

Returns:

New query valve

withAttributeToGet

public ScanValve withAttributeToGet(String... names)

With these extra attributes to pre-fetch.

Parameters:

names - Name of attributes to pre-load

Returns:

New query valve