/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.brooklyn.core.internal.storage;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentMap;
import com.google.common.annotations.VisibleForTesting;
public interface DataGrid {
/**
* If a map already exists with this id, returns it; otherwise creates a new map stored
* in the datagrid.
*/
<K,V> ConcurrentMap<K,V> getMap(String id);
/**
* Deletes the map for this id, if it exists; otherwise a no-op.
*/
void remove(String id);
/**
* Terminates the DataGrid. If there is a real datagrid with multiple machines running, it doesn't mean that the
* datagrid is going to be terminated; it only means that all local resources of the datagrid are released.
*/
void terminate();
Map<String, Object> getDatagridMetrics();
/** Returns snapshot of known keys at this datagrid */
@VisibleForTesting
Set<String> getKeys();
}