/*
 * 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.ignite.internal.processors.cache.persistence.metastorage;

import java.io.Serializable;
import java.util.Map;

import org.apache.ignite.IgniteCheckedException;
import org.apache.ignite.lang.IgnitePredicate;

/**
 *
 */
public interface ReadOnlyMetastorage {
    /** */
    Serializable read(String key) throws IgniteCheckedException;

    /**
     * Read all keys matching provided predicate.
     *
     * @param keyPred Key predicate.
     * @return Matched key-value pairs.
     * @throws IgniteCheckedException If failed.
     */
    Map<String, ? extends Serializable> readForPredicate(IgnitePredicate<String> keyPred) throws IgniteCheckedException;
}