foundation/org.eclipse.persistence.core/src/main/java/org/eclipse/persistence/internal/cache/AdvancedProcessor.java

/*
 * Copyright (c) 2015, 2020 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0,
 * or the Eclipse Distribution License v. 1.0 which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
 */

// Contributors:
//      Marcel Valovy - initial API and implementation
package org.eclipse.persistence.internal.cache;

/**
 * Processor for computable tasks.
 *
 * Concurrent.
 *
 * @author Marcel Valovy - marcel.valovy@oracle.com
 * @since 2.6
 */
public class AdvancedProcessor implements Processor, Clearable {

    private Memoizer<Object, Object> memoizer = new Memoizer<>();

    @Override
    public <A, V> V compute(ComputableTask<A, V> task, A taskArgument) {
        while (true) {
            try {
                //noinspection unchecked
                return (V) memoizer.compute((ComputableTask<Object, Object>) task, taskArgument);
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
            }
        }
    }

    @Override
    public void clear() {
        memoizer.forgetAll();
    }
}