com.jcabi.dynamo.Valve Maven / Gradle / Ivy
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package com.jcabi.dynamo;
import com.amazonaws.services.dynamodbv2.model.Condition;
import com.jcabi.aspects.Immutable;
import java.io.IOException;
import java.util.Collection;
import java.util.Map;
/**
* Provider of dosages of DynamoDB items.
*
* @since 0.7.21
*/
@Immutable
public interface Valve {
/**
* Fetch the first dosage.
* @param credentials Credentials to AWS
* @param table Table name
* @param conditions Conditions
* @param keys Keys of the table
* @return Dosage
* @throws IOException In case of DynamoDB failure
* @checkstyle ParameterNumber (5 lines)
*/
Dosage fetch(Credentials credentials, String table,
Map conditions, Collection keys)
throws IOException;
/**
* Count items.
* @param credentials Credentials to AWS
* @param table Table name
* @param conditions Conditions
* @return Total count of the
* @throws IOException In case of DynamoDB failure
*/
int count(Credentials credentials, String table,
Map conditions) throws IOException;
}