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// Copyright (C) 2008 The Android Open Source Project
//
// 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.google.gerrit.server.project;
import com.google.gerrit.common.Nullable;
import com.google.gerrit.reviewdb.client.AccountGroup;
import com.google.gerrit.reviewdb.client.Project;
import java.io.IOException;
import java.util.Set;
/** Cache of project information, including access rights. */
public interface ProjectCache {
/** @return the parent state for all projects on this server. */
ProjectState getAllProjects();
/** @return the project state of the project storing meta data for all users. */
ProjectState getAllUsers();
/**
* Get the cached data for a project by its unique name.
*
* @param projectName name of the project.
* @return the cached data; null if no such project exists, projectName is null or an error
* occurred.
* @see #checkedGet(com.google.gerrit.reviewdb.client.Project.NameKey)
*/
ProjectState get(@Nullable Project.NameKey projectName);
/**
* Get the cached data for a project by its unique name.
*
* @param projectName name of the project.
* @throws IOException when there was an error.
* @return the cached data; null if no such project exists or projectName is null.
*/
ProjectState checkedGet(@Nullable Project.NameKey projectName) throws IOException;
/**
* Get the cached data for a project by its unique name.
*
* @param projectName name of the project.
* @param strict true when any error generates an exception
* @throws Exception in case of any error (strict = true) or only for I/O or other internal
* errors.
* @return the cached data or null when strict = false
*/
public ProjectState checkedGet(Project.NameKey projectName, boolean strict) throws Exception;
/** Invalidate the cached information about the given project. */
void evict(Project p);
/** Invalidate the cached information about the given project. */
void evict(Project.NameKey p);
/**
* Remove information about the given project from the cache. It will no longer be returned from
* {@link #all()}.
*/
void remove(Project p);
/**
* Remove information about the given project from the cache. It will no longer be returned from
* {@link #all()}.
*/
void remove(Project.NameKey name);
/** @return sorted iteration of projects. */
Iterable<Project.NameKey> all();
/**
* @return estimated set of relevant groups extracted from hot project access rules. If the cache
* is cold or too small for the entire project set of the server, this set may be incomplete.
*/
Set<AccountGroup.UUID> guessRelevantGroupUUIDs();
/**
* Filter the set of registered project names by common prefix.
*
* @param prefix common prefix.
* @return sorted iteration of projects sharing the same prefix.
*/
Iterable<Project.NameKey> byName(String prefix);
/** Notify the cache that a new project was constructed. */
void onCreateProject(Project.NameKey newProjectName);
}
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