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/*
* Copyright 2006 Amazon Technologies, Inc. or its affiliates.
* Amazon, Amazon.com and Carbonado are trademarks or registered trademarks
* of Amazon Technologies, Inc. or its affiliates. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.amazon.carbonado;
import java.util.concurrent.atomic.AtomicReference;
/**
* Standard interface for building up configuration and opening a {@link
* Repository} instance. All repository implementations should be constructable
* via a builder that implements this interface. Builders should follow a
* pattern where configuration is supplied via property access methods. With
* this design, each item can have extensive documentation and optional
* configuration can be ignored.
*
* <p>A builder design also offers advantages over constructors in that a
* different repository can be built depending on the specific
* configuration. This logic is hidden, making it easier to use repositories
* that would otherwise require complex steps to construct.
*
* @author Brian S O'Neill
*/
public interface RepositoryBuilder {
/**
* Builds a repository instance.
*
* @throws ConfigurationException if there is a problem in the builder's configuration
* @throws RepositoryException if there is a general problem opening the repository
*/
Repository build() throws ConfigurationException, RepositoryException;
/**
* Builds a repository instance.
*
* <p>If the repository is being wrapped by a parent repository, the child
* repository will need to know this fact for some operations to work
* correctly. Since the parent repository is not built yet, a reference is
* used instead.
*
* @param rootReference reference to root parent repository, to be set by
* parent repository upon being built
* @throws ConfigurationException if there is a problem in the builder's configuration
* @throws RepositoryException if there is a general problem opening the repository
*/
Repository build(RepositoryReference rootReference)
throws ConfigurationException, RepositoryException;
/**
* Returns the name of the repository.
*/
String getName();
/**
* Set name for the repository, which is required.
*/
void setName(String name);
/**
* Returns true if repository should assume the role of master, which is
* true by default. Repositories that link different repositories together
* will designate only one as the master.
*
* <p>A master repository is responsible for {@link Version version} and
* {@link Sequence sequence} properties. For insert operations, a master
* repository must set these properties if they are uninitialized. For
* updates, the version property is checked to see if an {@link
* OptimisticLockException} should be thrown.
*
* @see com.amazon.carbonado.repo.replicated.ReplicatedRepositoryBuilder
*/
boolean isMaster();
/**
* Set to false if repository should not assume the role of master. By
* default, this option is true. Repositories that link different
* repositories together will designate only one as the master.
*
* <p>A master repository is responsible for {@link Version version} and
* {@link Sequence sequence} properties. For insert operations, a master
* repository must set these properties if they are uninitialized. For
* updates, the version property is checked to see if an {@link
* OptimisticLockException} should be thrown.
*
* @see com.amazon.carbonado.repo.replicated.ReplicatedRepositoryBuilder
*/
void setMaster(boolean b);
public class RepositoryReference extends AtomicReference<Repository> {}
}
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