org.wildfly.clustering.context.ContextualExecutor Maven / Gradle / Ivy

Go to download
/*
 * Copyright The WildFly Authors
 * SPDX-License-Identifier: Apache-2.0
 */

package org.wildfly.clustering.context;

import java.util.concurrent.Callable;
import java.util.concurrent.Executor;
import java.util.function.Supplier;

import org.wildfly.common.function.ExceptionRunnable;
import org.wildfly.common.function.ExceptionSupplier;

/**
 * Facility for contextual execution.
 * @author Paul Ferraro
 */
public interface ContextualExecutor extends Contextualizer, Executor {

    /**
     * Executes the specified runner.
     * @param  the exception type
     * @param runner a runnable task
     * @throws E if execution fails
     */
     void execute(ExceptionRunnable runner) throws E;

    /**
     * Executes the specified caller with a given context.
     * @param  the return type
     * @param caller a callable task
     * @return the result of the caller
     * @throws Exception if execution fails
     */
     T execute(Callable caller) throws Exception;

    /**
     * Executes the specified supplier with a given context.
     * @param  the return type
     * @param supplier a supplier task
     * @return the result of the supplier
     */
     T execute(Supplier supplier);

    /**
     * Executes the specified supplier with a given context.
     * @param  the return type
     * @param  the exception type
     * @param supplier a supplier task
     * @return the result of the supplier
     * @throws E if execution fails
     */
     T execute(ExceptionSupplier supplier) throws E;

    @Override
    default Runnable contextualize(Runnable runner) {
        return new Runnable() {
            @Override
            public void run() {
                ContextualExecutor.this.execute(runner);
            }
        };
    }

    @Override
    default  ExceptionRunnable contextualize(ExceptionRunnable runner) {
        return new ExceptionRunnable<>() {
            @Override
            public void run() throws E {
                ContextualExecutor.this.execute(runner);
            }
        };
    }

    @Override
    default  Callable contextualize(Callable caller) {
        return new Callable<>() {
            @Override
            public T call() throws Exception {
                return ContextualExecutor.this.execute(caller);
            }
        };
    }

    @Override
    default  Supplier contextualize(Supplier supplier) {
        return new Supplier<>() {
            @Override
            public T get() {
                return ContextualExecutor.this.execute(supplier);
            }
        };
    }

    @Override
    default  ExceptionSupplier contextualize(ExceptionSupplier supplier) {
        return new ExceptionSupplier<>() {
            @Override
            public T get() throws E {
                return ContextualExecutor.this.execute(supplier);
            }
        };
    }
}