nifi-registry-core/nifi-registry-framework/src/main/java/org/apache/nifi/registry/provider/ProviderFactory.java

/*
 * 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.nifi.registry.provider;

import java.util.List;

import org.apache.nifi.registry.extension.ExtensionBundlePersistenceProvider;
import org.apache.nifi.registry.flow.FlowPersistenceProvider;
import org.apache.nifi.registry.hook.EventHookProvider;

/**
 * A factory for obtaining the configured providers.
 */
public interface ProviderFactory {

    /**
     * Initialize the factory.
     *
     * @throws ProviderFactoryException if an error occurs during initialization
     */
    void initialize() throws ProviderFactoryException;

    /**
     * @return the configured FlowPersistenceProvider
     */
    FlowPersistenceProvider getFlowPersistenceProvider();

    /**
     * @return the configured FlowHookProviders
     */
    List<EventHookProvider> getEventHookProviders();

    /**
     * @return the configured ExtensionBundlePersistenceProvider
     */
    ExtensionBundlePersistenceProvider getExtensionBundlePersistenceProvider();

}